RC India

RC Models => Electric Planes => Topic started by: VC on June 24, 2012, 11:23:29 PM



Title: Avispad Build Log
Post by: VC on June 24, 2012, 11:23:29 PM
I've been contemplating building the Avispad. It seems to be a great flyer. I was nitpicking and got stuck on a few 'missing' measurements. I know I could have taken the easier way out by taking short cuts, after all, the others who have built this model - successfully produced great flyers.

My apologies to the original designer/s, I hope I am NOT infringing on any copyrights.

Anyway, here are my two penny bits of 'rectifications' and I hope this helps all concerned.





Title: Avispad Build Log
Post by: VC on June 24, 2012, 11:25:30 PM
These plans remain unchanged.

I know these minor clarifications won't make a difference to an already proven design, but then, what the hell - it may help another nitpicking individual when he decides to build this model......... :giggle:


Title: Avispad Build Log
Post by: samlikespad on June 25, 2012, 01:00:05 AM
That was real nice of you VC  :salute: I have built and helped many but never thought about doing this! Well done and for sure this will help any one who wants to build this great trainer!


Title: Avispad Build Log
Post by: VC on June 25, 2012, 10:47:47 AM
Thanks Sam. I would request others who have built the Avispad to comment if these measurements are correct or do we need to make any further alterations as I am about to start cutting today.

Thanks and Regards.


Title: Avispad Build Log
Post by: amit_delhi on June 25, 2012, 03:40:18 PM
  :thumbsup: looking forward to a great beginner model detailed build log with pictures and videos, following this thread for my own build....


Title: Avispad Build Log
Post by: VC on July 05, 2012, 12:43:43 AM
Krish, Ved, Ritz, Sam -

What is the AUW (Airframe + Motor + Prop+ RX + Battery + ESC + Servos + Push Rods + Wheels = EVERYTHING!) of your model?

Cheers!



Title: Avispad Build Log
Post by: samlikespad on July 05, 2012, 10:56:22 AM
VC, in my case they were 1.2kg with a Turnigy 3542 1450kv motor (which was an overkill), 60A plush esc (again an over kill), Turnigy 2200 3S 20C and mini sized HK servos. I could have gone way low if I had the right motor/esc to mount.


Title: Avispad Build Log
Post by: VC on July 05, 2012, 11:06:41 AM
Thanks a ton Sam! In your opinion, what should be the ideal AUW? Also please suggest a motor + Prop combo. How would the 1250 Kv CF 2822 do with a 8X4 prop?


Title: Avispad Build Log
Post by: samlikespad on July 05, 2012, 11:08:48 AM
As per the designer I think its 1.2 to 1.3kg. And it was very floaty within that weight range.


Title: Avispad Build Log
Post by: VC on July 06, 2012, 11:18:28 PM
Build in progress. Not getting enough confidence to cut a notch on the completed wing / wing spar and squirting hot glue into it to create the required dihedral. I have built the wing as a single piece and don't want to ruin it. Any suggestions?


Title: Avispad Build Log
Post by: samlikespad on July 06, 2012, 11:28:47 PM
You could sandwich the center with lite ply pieces. And VC, if its for you, do you really need a dihedral ;) since it floats pretty good, having low rates and some expo is all that needed to get this to behave good. I tried a semi symmetrical straight wing and loved it!

Edit: Oh sorry, I think I missed some thing. You already have the wing built as one piece. In that case I dont know whether you could use some thing like a lite ply piece to strengthen the spar center :(


Title: Avispad Build Log
Post by: VC on July 06, 2012, 11:51:43 PM
Sam my saviour.

I too have accidentally created semi symmetrical wings. Aimed at a flat bottom though! I am a novice flyer and would prefer a dihedral. Should I try this technique, will it hold? I fear it may unfold in flight. However, since this has been uploaded by the designer, it should be practical, what say? I just don't have his (Bex's) confidence.

I miss Izmile.


Photos courtesy (and my personal gratitude to them) www.spadworld.net and http://bexspadgroup.blogspot.in/ and www.rcgroups.com

http://spadworld.net/forum/viewtopic.php?t=15648&postdays=0&postorder=asc&start=0

http://bexspadgroup.blogspot.in/2008/07/avispad-build.html

http://www.rcgroups.com/forums/showthread.php?t=893170


Title: Avispad Build Log
Post by: samlikespad on July 06, 2012, 11:59:13 PM
I have tried Bex's method and back in Kottayam I once had a wing fold mid air (was bit windy). Some how I managed to land it without much damage. Any how, the way I do it is to put either lite ply or an additional piece of 4mm coro on both sides to sandwich the spar at the middle. Since the AUW of this bird is so low, this should hold. Please dont forget to double the spar at the middle for additional strength. If you have enough width at the middle of the spar, you could try Bex's method by cutting a little in the middle and filling it with hot glue. However, I always make sure to use additional pieces of either lite ply or coro as doublers.


Title: Avispad Build Log
Post by: VC on July 07, 2012, 12:01:30 AM
Now that the wing is ready and glued in a piece, adding additional reinforcement is going to be pain. Anyway, thanks for your help and encouragement at this hour. God bless.


Title: Avispad Build Log
Post by: samlikespad on July 07, 2012, 01:55:15 AM
Lets hope for the best and good luck with the build. Kindly post pics and videos.


Title: Avispad Build Log
Post by: VC on July 07, 2012, 10:32:04 PM
In the past, I have posted some build threads only after the model was completed. This time I've decided to go with an actual build process while the model is still under construction and I will try to keep updating this thread till I maiden her.

I am trying to post a detailed build log, I hope others find it useful. Wouldn't want to bore people with a rambling narration as the pictures should be self explanatory. However, I would welcome any queries / questions about specific steps.

All construction from 3 mm (white)and 4 mm (yellow) coro.

Here goes.


Title: Avispad Build Log
Post by: VC on July 07, 2012, 10:38:29 PM
Must thank Krish,Ved, Ritz, Sam and all the others who inspired me to build this baby. Thanks Guys  :hatsoff:!


Title: Avispad Build Log
Post by: VC on July 07, 2012, 10:43:18 PM
Could the Admin Team please change the title of this thread to Avispad Plans and Build Log?

Thanks.


Title: Avispad Build Log
Post by: VC on July 07, 2012, 10:53:01 PM
A failed attempt at trying to create a wing dihedral using hot glue. I wasn't confident about it. Perhaps I needed a different grade of glue stick. In hindsight, I am fortunate that this didn't work out. It would have probably collapsed in mid flight.


Title: Avispad Build Log
Post by: VC on July 07, 2012, 11:03:31 PM
Squirted Hot Glue (ugly job) and let it set for the night. This morning when I gave it a stress test, it just gave way. Had the wing wrap reinforcement been in place, maybe it would have held.


Title: Avispad Build Log
Post by: VC on July 07, 2012, 11:11:57 PM
So  now the only option left was to cut out a window and use additional reinforcement (soft yet strong Chinese decorative wooden beats - available in Furniture manufacturing units) made out of wood on either side of the coro spar. This time I used Epoxy - Fevitite Rapid. Bingo! :thumbsup:


Title: Avispad Build Log
Post by: VC on July 07, 2012, 11:23:12 PM
Again created the dihedral by placing a 3" piece of thermocole below the right wing tip and laying the left wing flat on the floor weighted down with bricks. Also applied a generous layer of Epoxy to the 'v' formed  on the top surface of the wing joint line, caused by the dihedral.


Title: Avispad Build Log
Post by: VC on July 07, 2012, 11:26:52 PM
Turtle Deck and Wing Wrap.


Title: Avispad Build Log
Post by: VC on July 07, 2012, 11:32:44 PM
Attaching the wing wrap (4" wide with flutes running span wise) starting from mid section of wing bottom and continuing to the bottom trailing edge - upwards to the wing upper trailing edge - to the upper leading edge - back down to meet at the mid section under the wing. Confusing? Just check the photos........


Title: Avispad Build Log
Post by: samlikespad on July 08, 2012, 01:18:45 AM
Good going VC !!! About the wing giving way, you are supposed to squirt hotglue only at the v joint of the spar: not on the whole cord! Once you have the spar done, a wing wrap is what should hold every thing together. Anyway, glad you have sorted it out already. Well done!


Title: Avispad Build Log
Post by: VC on July 08, 2012, 11:41:25 AM
Thanks Sam!

I gave it the works. Squirted hot glue at the spar joint, held it down at the dihedral angle. After it had set, I sealed the cut that I had made on the wing chord with hot glue again. Anyway, now with epoxy and wooden braces, it is way stronger.


Title: Avispad Build Log
Post by: samlikespad on July 08, 2012, 12:18:51 PM
VC, two things I noticed about the wings from the pics:

1: The LE seems to be very blunt! You could have easily created a nice curve there. I think you added an extra score line and it bent from there. Next time, you could use a long ruler or aluminium flat piece  close to the LE to pin/hold the bottom piece to the ground while you curve the upper piece and glue. Hold it using weights ( I use tables or chairs and some times I ask my little ones to sit on the chair :D ) on both ends of the wing until the glue dries.
2: The TE seems like glued with hotglue/epoxy. Hot glue might not hold and either one of them could add a lot of weight. CA can do the job if you clean/sand the surface and apply moderately.


Title: Avispad Build Log
Post by: VC on July 08, 2012, 12:30:06 PM
1. That is a smashing idea and I must try that on my next build. Unfortunately, I don't have any little ones - just one big monster who is my helping hand when it comes to building. She knows her ESC's and Prop Dias and is invaluable when it comes to things like soldering. Just showing off, a proud Dad after all. :)

2. The T.E. has been joined with C.A. I just wanted some added strength so was trying to weld the coro.

As per your advice, I am way below the ideal A.U.W. of 1.2 - 1.5 kgs. At the moment I am maxing out at about a Kg, therefore taking my chances with additional reinforcements.

Trying to build an ugly plane that I won't be too scared of crashing. After all, SPADs die hard!

Your observations / comments are a GREAT help, please continue as I post. :thumbsup:


Title: Avispad Build Log
Post by: samlikespad on July 08, 2012, 01:03:39 PM
Indeed nice to have a helping hand :) VC, the blunt LE bothers me :( may be our forum heroes can enlighten us on that part). By the way, what is the power setup you intend to use?


Title: Avispad Build Log
Post by: VC on July 08, 2012, 01:10:32 PM
Shooting it back to you - what is your opinion of the CF 2822 motor @ 1250 Kv spinning a 8 X 4 prop? Good enough? Or else a 900 Kv with a 9 X 5 prop?

Master you have me worried about the LE now  :banghead:. Let me see if I can rectify it or else I'll just take my chances. Have seen worse flying beautifully............. :giggle:


Title: Avispad Build Log
Post by: manojswizera on July 08, 2012, 01:14:44 PM
Vc sir , just a small suggestion.
bend a cycle spoke according to the dihederal angle ( 2 spokes ) put one above the wing and other at the botom.
pass it through the white flutes ( the joiner at junction of wings ). and just hot glue it.
This will help the wing to stay in its dihederal shape, and if the wing collapse also. it will hold it due to the tension of the wire.
and will not add much weight.

manoj


Title: Avispad Build Log
Post by: VC on July 08, 2012, 01:20:57 PM
Thanks Manoj. Have tried that technique on my earlier Coro builds and it worked very well. This time I did not want to deviate from the techniques suggested by the designer Bex.


Title: Avispad Build Log
Post by: samlikespad on July 08, 2012, 01:37:59 PM
Shooting it back to you - what is your opinion of the CF 2822 motor @ 1250 Kv spinning a 8 X 4 prop? Good enough? Or else a 900 Kv with a 9 X 5 prop?


VC bhai, that might be a bit under powered and you might end up fighting to balance the plane. I have the bad habit of over powering my planes and last time I remember putting a 3542 1450kv on it  :giggle: IMHO a 2826 should be a better option. Its a 3 pound plane and you need some thing like 300W (or plus  >:D ) for decent performance.


Title: Avispad Build Log
Post by: VC on July 08, 2012, 02:01:19 PM
Thanks, I have a 1500 kv DYS (250 watts) sitting around somewhere. If I can keep the weight to 1 Kg, that should suffice.

These calculations are based on over estimation of weights:

Basic airframe : less than 450 grams - ACTUAL.
Battery (2200mAh 3S) : 190
Motor : 60 grams (if I choose a heavy motor)
Esc : 30 gms
Rx : 15 gms
3 X 9 gm servos = 30 gms
Landing gear = 100 gms (heavy!!!) Giggle :giggle:

Other accessories = 100 gms (motor mount, push rods, servo horns etc)

AUW is still under a Kg. (975 grams)




Title: Avispad Build Log
Post by: samlikespad on July 08, 2012, 02:09:06 PM
Wow VC, thats an amazing AUW  {:)} But keep an eye on the balancing part.


Title: Avispad Build Log
Post by: VC on July 08, 2012, 02:21:14 PM
Wilco! That's why I took the liberty of strengthening the fuselage with additional bulkheads made out of high density thermocole.


Title: Avispad Build Log
Post by: samlikespad on July 08, 2012, 02:31:23 PM
Interesting!  :salute:


Title: Avispad Build Log
Post by: VC on July 12, 2012, 12:30:30 AM
I have sent 2 PM's to the honourable Administrator to rename this thread as the "Avispad Build Log". He must have missed them. However, construction continues, more pictures soon. Please bear with me.


Title: Avispad Build Log
Post by: KALYANPRODHAN on July 12, 2012, 03:34:28 AM
All changed but the last as that you can, VC sir the Grate. Just Modify.
And I suggest APC Prop with 2826 motor
http://hobbysea.com/products.php?18&cPath=14&sid=05ef41b8ced06d6cf1b0b39876c78aa4
320 watt.
You can get unlimited vertical even for 1.5 kg too. with prop adapter (Not prop saver and best suited for APC Prop) And low cost too

But surely you have similar one


Title: Avispad Build Log
Post by: rcpilotacro on July 12, 2012, 04:24:46 AM
VC
great going!! could you add just enough coro to the foam consignment so that i can give it a go ?


Title: Avispad Build Log
Post by: VC on July 12, 2012, 09:27:39 AM
Thanks Kalyan. I have the same motor, however, will a 7X4 prop generate enough wash for this model?

Wilco Sir. One sheet of 6' X 4' Coro added.


Title: Avispad Build Log
Post by: samlikespad on July 12, 2012, 10:59:14 AM
An APC or APC style HK 8x4 with this motor is a good combo IMO while a 7x4 would do for a less than a kilo trainer. We want pictures :D


Title: Avispad Build Log
Post by: allthatido on July 12, 2012, 01:34:31 PM
Hi VC

Excellent build from you (as always).  As far as the CF2822 motor is concerned it will definitely be underpowered. I used the same motor with a 9x4.7 and 10x4.7 on my TB-20. The static thrust values were 600 grms and 730 grms respectively. So avoid that motor for the avispad.

All the best for the rest of the build and maiden. Subscribed. Paint her a beauty like your boats. :)

Regards
Ankur


Title: Avispad Build Log
Post by: VC on July 12, 2012, 01:47:56 PM
Thanks Guys. I'm really in a dilemma with the powerplant now. CF2822 (1250Kv)can accommodate a bigger prop with a smaller ESc, but the 2826 (2200 Kv) can only take a smaller prop with a much bigger ESC. AUW is going to be just about a kg, and I want to get the power right the first time.


Title: Avispad Build Log
Post by: sundaram on July 12, 2012, 01:56:00 PM
Your avispad is going to be a slow flyer. You should go with the lesser KV brushless you will get better control over its flying. Go with larger prop and 1250 KV.

Though if you are planning on loops and some aeros you should go in for 2836 same KV.


Title: Avispad Build Log
Post by: VC on July 12, 2012, 02:11:12 PM
Sandy, too much of stuff stockpiled and forgotten at the time of need. Just found this motor in my collection, thereby adding another possible combination. Now tell me:

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8622


Title: Avispad Build Log
Post by: samlikespad on July 12, 2012, 02:18:09 PM
VC, It might barely get the plane up if you could keep the AUW say just about 800 to 900g. It still is very under powered. 2826 is much suited (though I had a lower kv in mind) and you have one lying around. You could change it with a lower kv motor once you have one. Just my opinion :)


Title: Avispad Build Log
Post by: rcpilotacro on July 12, 2012, 07:39:26 PM
VC
2826-2200 kv in spad, motor will overheat (Due to high drag and low forward speed), this is more of a radjet/ scratch built fighter motor.high KV high draw for same watt, for spad ? you are win win with low kv


Title: Avispad Build Log
Post by: VC on July 12, 2012, 07:46:17 PM
Aye Aye Cap'n! Now do you think I should give the 900Kv a shot?


Title: Re: Avispad Build Log
Post by: izmile on July 13, 2012, 03:34:51 AM
Hi VC,

Nice build thread. Please post pictures of the model. I am sure its going to be a great flyer.

BTW, as everyone suggested this will be a slow flyer. So, go for a low KV motor on this one.

-Ismail


Title: Re: Avispad Build Log
Post by: rcpilotacro on July 13, 2012, 06:34:22 AM
Aye Aye Cap'n! Now do you think I should give the 900Kv a shot?
absolutely, with a matching prop, she will fly well, rolling take off and off you go, can do some real cool slow approach and landing. 


Title: Re: Avispad Build Log
Post by: manojswizera on July 13, 2012, 08:45:29 AM
Your avispad is going to be a slow flyer.
Just for knowledge.
Sir how you decide whether it will be a slow flyer or fast one ?


Title: Re: Avispad Build Log
Post by: rcpilotacro on July 13, 2012, 09:37:20 AM
Lift, Thrust and Drag, drag comprises of Zero Lift Drag (mainly governed by total wetted area) and Lift Dependent drag (High Lift aerofoil, swept back aerofoil, high angle of attack) High Lift (High camber, low speed required to support the weight)

For more explanation read Basic AD thread


Title: Re: Avispad Build Log
Post by: VC on July 13, 2012, 09:52:18 AM
Thanks all. Build progressing rather slowly for the last few days. Will update soon.


Title: Re: Avispad Build Log
Post by: VC on July 16, 2012, 09:48:37 PM
Where should the landing gear be placed? How many millimeters from the nose? How close to the CG is ideal? Does it make a big difference?


Title: Re: Avispad Build Log
Post by: sundaram on July 16, 2012, 11:13:30 PM
This power plant would be the ideal for yours with 10x6 prop on 3 S.

http://www.rcindia.org/for-sale/for-sale-turnigy-d28369-950kv-brushless-outrunner-motor/msg109213/#new

If tail drager I would say, under carriage at 1/3 the distance of CG from nose ahead of CG.


Title: Re: Avispad Build Log
Post by: VC on July 16, 2012, 11:33:42 PM
Undercarriage position noted.

Motor is too expensive since I already have a lot of choices to experiment with. Further the seller is asking for Rs.1400/- for a Rs.684/- product (instead of trying to merely recover his money, as explained in his post -"Bought it for a friend and now he does not needs one.. shucks"  ;) )  and the reviews are not too hot anyway. Will let this one pass.


Title: Re: Avispad Build Log
Post by: KALYANPRODHAN on July 17, 2012, 08:48:38 AM
VC, Check aeroworks.


Title: Re: Avispad Build Log
Post by: samlikespad on July 17, 2012, 02:29:06 PM
VC, there is a smaller version of this bird called the avipark. Your earlier mentioned motor seems well suited for it just in case ;)


Title: Re: Avispad Build Log
Post by: VC on July 18, 2012, 11:41:34 AM
Undercarriage assembly. Bicycle spokes through coro flutes. Wheel struts reinforced with a carbon fibre spar embedded in coro.


Title: Re: Avispad Build Log
Post by: VC on July 18, 2012, 11:54:55 AM
The build process. The centre coro spar has a CF rod embedded in it and the entire thing is hot glued in place. I think I will remove the hot glue from  one side of the joint and strengthen it with epoxy.


Title: Re: Avispad Build Log
Post by: rcpilotacro on July 18, 2012, 11:55:54 AM
VC
you will need a anti rotation bend which will go into the fuse, parallel to Normal axis. See image


Title: Re: Avispad Build Log
Post by: VC on July 18, 2012, 12:01:10 PM
Thanks. Anti rotation bend has been done. Uploading in a while.


Title: Re: Avispad Build Log
Post by: VC on July 18, 2012, 12:03:59 PM
Schematic showing the Anti Rotation Bend.


Title: Re: Avispad Build Log
Post by: samlikespad on July 18, 2012, 12:10:17 PM
Wow! VC your build looks very nice  {:)} Another method for the cycle spoke kind of LG is to have two pieces of it through the coro to both ends but joined at both sides in a "V" (or "Y") shape. This has proven quite good even for a full size SPAD Deb for me.


Title: Re: Avispad Build Log
Post by: VC on July 18, 2012, 12:12:30 PM
Thanks Sam. Any pics?


Title: Re: Avispad Build Log
Post by: samlikespad on July 18, 2012, 12:13:57 PM
Let me try to draw one for you.


Title: Re: Avispad Build Log
Post by: VC on July 18, 2012, 12:16:24 PM
Was wondering how to give her a tail wheel, when my daughter came up with a good suggestion of modifying a Coke bottle cap. Will give it a try, though I am still looking for a wheel cannibalised from a broken toy car.


Title: Re: Avispad Build Log
Post by: Mjet on July 18, 2012, 12:34:05 PM
Pl see the picture for LG.


Title: Re: Avispad Build Log
Post by: samlikespad on July 18, 2012, 12:35:17 PM
VC, forgive me for the crappy drawing I just made :( . But hope that will give you an idea to consider in your future projects. If you tie a piece of rubber band in between them, it gives you an effective shock absorbing system too ( I recommend this as this adds strength too)


Title: Re: Avispad Build Log
Post by: samlikespad on July 18, 2012, 12:37:07 PM
Mjet, thats an excellent way too if the iron rod wont bent. I devised this way as the one I had was a bit soft.


Title: Re: Avispad Build Log
Post by: VC on July 18, 2012, 12:38:43 PM
Thanks will definitely try this on future builds.

Mjet, that spoke is definitely thicker than what I am using. Where does one get Kevlar from?


Title: Re: Avispad Build Log
Post by: rcpilotacro on July 18, 2012, 02:19:02 PM
Where does one get Kevlar from?

Thin muslin, denatured alcohol, Epoxy, you got yourself a bullet proof materiel

here is one
Carbon Fiber and Kevlar-29 Cloth (180g/m2) 1mtr  (http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10756)


Title: Re: Avispad Build Log
Post by: manojswizera on July 18, 2012, 03:58:57 PM
Sir looking beautiful

Was wondering how to give her a tail wheel


Sir u can have this idea. If he suits you. here is the link
http://www.rcindia.org/tools-materials-and-building-techniques/tail-wheel-an-easy-build/

manoj


Title: Re: Avispad Build Log
Post by: samlikespad on July 18, 2012, 04:28:22 PM
I use a triangular piece of lite ply epoxied under the tail section. Before its epoxied, I will have a piece of high temper wire (usually use HK control rod piece) for mounting the tail wheel and its steerable. Later I found out that HK has a similar thing  

For smaller models like the avi, you could pass the rod straight up the rudder hinge line and epoxy into the first flute. Never had a problem.

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8004


Title: Re: Avispad Build Log
Post by: Mjet on July 18, 2012, 05:15:42 PM
Hope these pictures may helps u to fix tail wheel.


Title: Re: Avispad Build Log
Post by: Mjet on July 18, 2012, 05:16:45 PM
one more..


Title: Re: Avispad Build Log
Post by: izmile on July 18, 2012, 05:34:35 PM
Hi VC,

Nice looking bird you have up there.

I am a bit apprehensive on the landing gear that you made with bicycle spokes. I doubt they would withstand a hard landing. I like Mjet's suggestion and that is what I have done on may of my smaller planes (< ~3Kg). Sam's idea will also work but I do that for more heavier models (> ~3Kg).

The other thing is, if possible use spring steel for the landing gear. You will save a lot of grief fixing the LG made of bicycle spokes. Check with your local automobile garage. Most of them make springs for suspension etc..

-Ismail


Title: Re: Avispad Build Log
Post by: rastsaurabh on July 18, 2012, 07:23:25 PM
Hi Mjet,

With those nice examples of tail wheels we see very nicely finished Planes.....
would like you to show some pics..... and describe the foam material it looks good. and place to get it.

saurabh


Title: Re: Avispad Build Log
Post by: VC on July 18, 2012, 07:24:58 PM
Mjet - thanks a ton for taking all the effort.

Maestro - Too late to change anything now, will keep my fingers crossed and hope for the best. However, I have placed a weight of 2kgs on the fuselage and left it there for the last 4 hours. So far so good.


Title: Re: Avispad Build Log
Post by: KALYANPRODHAN on July 19, 2012, 01:32:39 AM
VC, Use complete spoke/Al Wire or Umbrella Spoke (Large) and get fold after inserting through flute like below. Please check pictures of my earlier post with more detailed pics.


Title: Re: Avispad Build Log
Post by: VC on July 19, 2012, 09:30:17 PM
Thanks to all especially Mjet, I managed to craft a satisfactory tail wheel from spare servo accessories. Used two of them and joined them together for aesthetic appeal and increased surface area.


Title: Re: Avispad Build Log
Post by: VC on July 19, 2012, 09:33:33 PM
Tail wheel attached to the fuselage.


Title: Re: Avispad Build Log
Post by: VC on July 19, 2012, 09:34:55 PM
Final.


Title: Re: Avispad Build Log
Post by: maserati on July 19, 2012, 09:47:15 PM
vc sir,
very nice built..i could have helped you with rear landing gear issue.i had internet issue at my place.
got to see your build just now..
regards.
hitesh..


Title: Re: Avispad Build Log
Post by: VC on July 19, 2012, 09:49:36 PM
Thanks Hitesh, all the best for your build. Upload your photos soon.


Title: Re: Avispad Build Log
Post by: rcpilotacro on July 20, 2012, 06:23:23 AM
am i getting to maiden this beauty ?

PS
Did you get it ? both


Title: Re: Avispad Build Log
Post by: S_K on July 20, 2012, 09:11:54 AM
Great build VC...
I'm just starting in this hobby and have extensively gone through the beginners' area.. Since you've made the landing gears and tail wheel assembly yourself (i.e. not the one bought from a rc seller), I would like to know the way in which you have placed the wheels on the metal wire? I mean, what mechanism holds the wheels to the metal wire/spring steel, while allowing the wheel to rotate freely - any special type of mini nut-bolt or the like?
Thanks..


Title: Re: Avispad Build Log
Post by: VC on July 20, 2012, 10:16:17 AM
Rcpa (too long a handle!) - yes got everything thanks. With your permission, I would like to maiden this baby. I've kept three better models for you to maiden.

S_K - The wheel is held between the bend in the bicycle spoke and the threaded nut. Will try and post a close up picture to explain.


Title: Re: Avispad Build Log
Post by: maserati on July 20, 2012, 10:25:32 AM
@S_K,,
just have a look at this picture .
you can make this entire structure from a single spoke.

regards..
hitesh


Title: Re: Avispad Build Log
Post by: S_K on July 20, 2012, 10:41:08 AM
Thanks Hitesh, the pic very much answered my query..
But one query still remains, at one end of the wheel, there is the spoke - but the other end is open... It is quite possible that wheel may come off from that end... So, (if we dont get the right nut) can we use some hot glue over there - after ensuring that the wheel is perfectly moving/spinning - so as to secure the other end?

@ VC - really awesome build, and waiting for that threaded nut's pic.. Is it available at any general hardware shop?


Title: Re: Avispad Build Log
Post by: maserati on July 20, 2012, 10:57:47 AM
S_K,
there are many things around which can be used to keep the wheel intact.i use to put small piece of pen refill and seal it with CA.this works really well with small planes.yes you can also use suitable size nut and seal it with CA.there are many things around us which can be used as alternatives,it ultimately saves money..
otherwise there are wheel collets  available in various hobby shops,based on your axels's diameter you can always get one..

regards..
hitesh
 


Title: Re: Avispad Build Log
Post by: VC on July 20, 2012, 11:06:36 AM
This is what a bicycle spoke looks like. One end is threaded and comes with a nut (you don't have to buy it separately) and the other end has a bend that needs to be chopped off. Hope this helps.

Maserati, it may be possible to make it out of a single spoke as you have pictorially depicted, however, that will result in a small undercarriage. For larger models it is advisable to use 2 spokes with adequate anti rotation bends.


Title: Re: Avispad Build Log
Post by: girishsarwal on July 20, 2012, 11:31:33 AM
@VC, your avispad looks great! Great going!

Here's a share of a steerable tail wheel for my next build, here's how I've done it-> The coro piece (yellow) that attaches to the fuselage is made up of two identical cutouts, one with flutes running vertically, and the other with flutes running horizontally (to provide some strength), glued together to give a block. I cut out a single flute from the vertical one (like we do to make a hinge) and this serves as a mundane tubing through which the gear shin passes. The washer to ensure the gear does not drop in the tubing, I think I will also add another washer and a small wire spring sometime later to add some shock absorption...

I am expecting comments/recommendations as well...


Title: Re: Avispad Build Log
Post by: rastsaurabh on July 20, 2012, 11:52:22 AM
Pictures by Mjet in this thread are worth seeing for people who need recommendations on tail wheel..... Post#75

Though he has not replied to my queries .... he has some brilliant models....


Title: Re: Avispad Build Log
Post by: Mjet on July 23, 2012, 03:16:40 PM
Hi all,
Sorry for delay in answer, because I am on tour and have limited excess to internet. The above models are not in my possession or made by be. I am a beginner and still struggling to build a first model.
Above are the ideas ( not my ideas) were collected for VC and I am trying to use one of them in my current build ( will post the pictures soon). Foam in pictures  is blue foam from  DOW chemicals , also available in india.
Thanks to all of you for your appreciation and moral boosting  :hatsoff:.

Regards
Mohan


Title: Re: Avispad Build Log
Post by: samlikespad on July 23, 2012, 03:37:50 PM
Mjet, you are an excellent researcher :) and a good human being. God bless! and  Good luck with your build.


Title: Re: Avispad Build Log
Post by: VC on July 24, 2012, 10:54:24 PM
Had been racking my brains to try and figure out a way to make a removable cowl so that I have easy access to the motor and the ESC. Rubber bands seemed too clumsy, screws would spoil the aesthetics as they would need washers and wooden beats to screw into. Finally came up with this solution and I am delighted with the overall effect and ease of removal. Basically it is a drawer. Two sheets of coro joined together slide into a pair of aluminium rails. Easy on, easy off.


Title: Re: Avispad Build Log
Post by: VC on July 24, 2012, 10:59:59 PM
Had bought an ESC (Budget 30 A) from coderbana which turned out to be busted as the motor would quit spinning at 3/4 throttle. Replaced that with a new Turnigy 25/30 A and all is well now.

I weighed the model and the AUW stands at 838 grams only (minus the push rods and horns). I guess I still have a 100 grams or so to play around with. Here are some more pics of the removable cowl cover.


Title: Re: Avispad Build Log
Post by: VC on July 24, 2012, 11:42:56 PM
Motor - EMax 2822 @ 1250 Kv
ESC - Turnigy 25/30 A
Prop - GWS type 9 X 6
Battery - Turnigy 1600mAh 3S 20 C
Servos - 3 X 9 gram Hextronics


Title: Re: Avispad Build Log
Post by: KALYANPRODHAN on July 25, 2012, 08:40:47 AM
Hi, VC Sir,If you have 1047 and /or 1138 prop, would you please post your experience, (Flight time, watt, thrust etc. As your baby is a very good floater for it's wing, and you are getting RCPA, JOINT measurement will be really helpful to us.

we are waiting for your video and experience please.


Title: Re: Avispad Build Log
Post by: manojswizera on July 25, 2012, 08:57:08 AM
Motor - EMax 2822 @ 1250 Kv
ESC - Turnigy 25/30 A
Prop - GWS type 9 X 6
Battery - Turnigy 1600mAh 3S 20 C
Servos - 3 X 9 gram Hextronics
Sir i think Cf2822 will be some under powered.


Title: Re: Avispad Build Log
Post by: Mjet on July 25, 2012, 12:43:51 PM
Hi VC,

I found some specs for this motor.

Features-

EMAX CF2822Outrunner Brushless Motors

It is the very high power delivered by these small and very robust, but light weight (39g) brushless motors with rotating case suitable for all models of 300-400 size .

Product details

-No. Of cells:2-3 Li-Poly
-RPM/V:1200RMP/V
-ZMax. efficiency 82%
-Max. efficiency current: 7 -16 A (>75%)
-No load current / 10 V : 0.9 A
-Current capacity :16 A/60 s
-Internal Resistance: 150 mohm
-Stator Dimensions: 22x10 mm
-Shaft diameter: 3 mm
-Weight: 39 g
-Recomended model weight :200 -600 g
-Recomended prop without gearbox : APC 7X4 /APC 8X3.8 /APC 9X4.5 /APC 10X5
-Propeller: 10X5
-Max Current:14.5A
-Max Trust: 710g/1.5lb.
Item Packing



Title: Re: Avispad Build Log
Post by: VC on July 26, 2012, 10:52:43 AM
Approaching the final stages of the build. Control horns cut out from plastic card (wanted this to be a SPAD in every respect, so I didn't use ready made horns), servos (HXT 900) mounted. Windshield attached.


Title: Re: Avispad Build Log
Post by: VC on July 26, 2012, 10:58:09 AM
Wing stays made out of pencil dia bamboo.


Title: Re: Avispad Build Log
Post by: girishsarwal on July 26, 2012, 11:13:53 AM
Your Avispad looks great VC.

Some help from spadders - Is there a reason why most spads have the aileron servo mounted upright on the upper surface of the wing.

http://www.spadtothebone.net/SPAD/Spadet/Page2/Page19/Page20/Page36/page36.html
http://www.spadtothebone.net/SPAD/Debonair/Page29/page29.html

Doesn't this add to the drag, even if little? If on the other hand this was mounted on the underside, so it can be concealed withing the fuselage when the wing is strapped on (like in most balsa trainers). Is it done to provide clearance to the push rods connecting to the ailerons?


Title: Re: Avispad Build Log
Post by: VC on July 26, 2012, 11:26:00 AM
Good question Girish. I do it simply for the ease in adjusting the linkage rods. If the servo was on the ventral (wing bottom) side and concealed within the fuselage, it would be a little more difficult to get at.


Title: Re: Avispad Build Log
Post by: girishsarwal on July 26, 2012, 11:38:26 AM
Thanks VC, makes sense. unstrapping the wing to make adjustments is pretty bothersome..esp on the field with limited flying time

I will try to mount mine on the ventral (thanks for the new term, is the upper surface called dorsal in that case?) for the J3 build to keep the looks close to the orig. Besides this, do you feel there could be any other reasons...


Title: Re: Avispad Build Log
Post by: VC on July 26, 2012, 11:40:49 AM
Dorsal = Upper, Ventral = Lower - unless I got them mixed up............... :giggle: ???


Title: Re: Avispad Build Log
Post by: girishsarwal on July 26, 2012, 12:01:39 PM
Thanks VC, I'd always mix up the fore and aft. I've added the terms to the rc jargon list. Mod, please advise if that is the right place and if the explanations are correct.


Title: Re: Avispad Build Log
Post by: manojswizera on August 03, 2012, 08:48:28 AM
Waiting for the flight videos VC sir.  (:|~


Title: Re: Avispad Build Log
Post by: SunLikeStar on August 03, 2012, 09:11:02 AM
I will try to mount mine on the ventral (thanks for the new term, is the upper surface called dorsal in that case?) for the J3 build to keep the looks close to the orig. Besides this, do you feel there could be any other reasons...
One advantage of having the servo on the underside of the wing is that it becomes easier to fix the wing on the plane using rubber bands, otherwise you have to fish the band from under the push rods for every loop. Also i prefer to have two servos for ailerons; easier to build and you can program them to have differential throw to counter adverse yaw.


Title: Re: Avispad Build Log
Post by: girishsarwal on August 03, 2012, 10:46:00 AM
One advantage of having the servo on the underside of the wing is that it becomes easier to fix the wing on the plane using rubber bands, otherwise you have to fish the band from under the push rods for every loop.

Absolutely agreed.

Also i prefer to have two servos for ailerons; easier to build and you can program them to have differential throw to counter adverse yaw.
Just finished programming my 9x with the latest er9x. So now I can surely mix some stuff. :D. I also intend to mix some flaperons for this one.

@VC, flight videos sire...





Title: Re: Avispad Build Log
Post by: VinayakR on August 03, 2012, 11:24:26 AM
Quote
Just finished programming my 9x with the latest er9x. So now I can surely mix some stuff. :D. I also intend to mix some flaperons for this one.

Hi girish ,

Isn't stock firmware V2 of TG9x is capable for misixing ?  ??? Also can please let me know the advantage of er9x over stock ? I searched could find out only LCD backlight support and easy menu , low voltage alarm is in v2 also.  :headscratch:

-Vinayak

@VC sir : Sorry for putting this question in your log , but it's full of information  ;D like landing gear, servo mounting , flashing tx ..and more..



Title: Re: Avispad Build Log
Post by: girishsarwal on August 03, 2012, 12:34:44 PM
Vinayak sir,

I've started a new thread so we don't put this one off topic.
http://www.rcindia.org/radios-and-receivers/modded-turnigy-9x-for-er9x-firmware/msg110797/#new

Yes the stock fw is capabale of doing quite some mixing, but the er9x has much powerful mixing features and there is a whole list of other things that come with er9x. It wouldn't be justified to put all of it here. Both towards VC and er9x ;)

But here's a cool one - Program a switch to be the trim selector, on a maiden flight, take off, hold the model level using the sticks, and flip the switch. The stick values will be automatically copied to the subtrims. I think the stock fw menu is easier to navigate than er9x. I will compile a list of what I think (my opinion only) is better and post it in the other thread.



Title: Re: Avispad Build Log
Post by: Snehal.Samar on August 05, 2012, 12:19:28 AM
Hi guys, :)

I have a question in mind. What is the need of spar when wings can be made without them? Even i have tried a dihedral wing without spar and it worked fine.

Pic Ss0317 and Ss0316 shows wings without spar ...and  1.jpg shows wing with dihedral without spar.

Thnks
SS


Title: Re: Avispad Build Log
Post by: samlikespad on August 05, 2012, 02:03:46 AM
Snehal, I have had wings with spar collapse midair as the stress on them up there is tremendous. Your model looks nice, but once all up, if you try lifting it by the wing tips it might collapse right there. I would not dare to fly it with out proper support to the wing. But if you have devised a way to strengthen it with out spar, please share it with us ;)


Title: Re: Avispad Build Log
Post by: Snehal.Samar on August 05, 2012, 03:38:03 AM
The wings have suffered extreme hard crashes...bt they are gud to go.No method invented jst used glue gun.I would be glad if i could be of any use.
I wil post the procedure today morning.
Its 3:45 am and i woke up only coz i drank lot of water tonight ;D


Title: Re: Avispad Build Log
Post by: samlikespad on August 05, 2012, 04:15:48 AM
Thanks Snehal, what thickness of coro you used for the wing? and do you have ribs inside the wing?


Title: Re: Avispad Build Log
Post by: Snehal.Samar on August 05, 2012, 01:02:37 PM
Hi,
I dont know xact thickness coz i dont buy them...i collect them.
Measured it and came wid 2.5 mm( bet. 2 and 3 mm).

I made wing with no ones help...but one will be able to do it faster and efficiently with a helping hand.(one will hold wing and one will apply glue).

Anyways, take equal dimension 2 pc coro sanded with circle motion on the places where you will be sticking two pieaces(kalyan Daa's method)

http://www.rcindia.org/tools-materials-and-building-techniques/sticking-coro-how-to/

..and then bend one NOT along flutes (mark '1 inch less than half of coro and bend from there') for desired aerofoil shape(by desired means refer to pic 2)..then tell other hand to hold it while you apply hot glue(follow the pic 1 process) and hold for 10 minutes(needs lots of patience to hold :) ,get some music).Remember to insert aileron between those two sheets you will be sticking . (refer pic 3).

Other wing the same way but keep their aerofoils equal .
If you want detachable wing get 3 ribs(ply) for each wing and insert them inside wings( corners and middle or anyway u find efficient). Stick ribs with hot glue. Then with help of carbon rods or any rod attach them like an easystar.
You may also make dihedral with two wings. Just make the dihedral and hot glue between gaps(drops) and wrap with rectangular coro.

Done.
thnks

P.s. My Ms paint skills are hilarious.  ;D


Title: Re: Avispad Build Log
Post by: samlikespad on August 05, 2012, 02:09:18 PM
Hi Snehal, appreciate your effort and hope that VC bhai don't mind  :giggle: .

See, I am not new to SPAD building but your method of not using a spar was surprisingly news to me. Coro wings especially with 2mm/3mm coro flutes cord-wise, does not have the strength to hold without a strong spar. Well, atleast with models those weigh more than a kilo. I haven't built any SPAD which is less than a kilo. So basically my question/doubt was how you strengthened your wing without a spar and how much your plane weighs all up? And do you have a build thread of this plane with more pics and videos?


Title: Re: Avispad Build Log
Post by: Snehal.Samar on August 05, 2012, 05:08:12 PM
Hi Snehal, appreciate your effort and hope that VC bhai don't mind  :giggle: .


Oh no samlikespad ...you have jst pissed him off..you are a dead man ..and so am i  :giggle: :giggle:

jokes apart ..i get strength to wings with method i posted above..all hot glue magic.

I have made two models(self design) so far but haven't started any build thread. I didnt had time to start that thread at that time.

The AUW for first model(pic above) was 920gms which was flop model ..it flew but was not efficient

(my mom gave it to my cousin's children in my absence and they made it a passenger plane with them as passengers on it  :banghead:. Thank god she took out Esc motor and Battery before :))  ..even though those little devils destroyed my plane ,i love them(its a mama thing). let me post their pic(pic1) so dat u can see how  >:D they are.it can be seen from their face. I think i am too social.

Second model was made from wooden stick AUW 850gms (wid HK donkey motor) ..flew like knife on butter..gud model...disassembled it coz it was ugly .wanted to build something new.

pic 1 shows my second model and pic 2 and 3 shows its fantastic pilot(in blue).pic 2 is a touchdown.

Thanks
SS


Title: Re: Avispad Build Log
Post by: samlikespad on August 05, 2012, 05:19:03 PM
Adorable devils you have there ;) Your planes, the pilot and the co-pilot looks cool too. If you could find time, please start a thread on them so that we can leave VC in peace with out hijacking his thread ;)


Title: Re: Avispad Build Log
Post by: Snehal.Samar on August 05, 2012, 06:24:17 PM
Your planes, the pilot and the co-pilot looks cool too.
haha...made my day ;D

so that we can leave VC in peace with out hijacking his thread ;)
@samlikespad. now you are surely a dead man .... :giggle:

i wil try to start a thread wid my next models.

Thnks for asking.
Ss


Title: Re: Avispad Build Log
Post by: VC on August 05, 2012, 10:10:23 PM
Wait till I get you hijackers! :violent:

Those kids are awesome! :-* (the little ones!)

Btw, I have somewhat failed to meet one of targets that I had set for myself for the Avispad ( as posted by me in Page 2 under Post # 27 of this thread). However, I'll leave it for you guys to judge it and comment tomorrow. ;)


Title: Re: Avispad Build Log
Post by: Snehal.Samar on August 06, 2012, 12:03:14 AM
Aha! so VC need little ones(as per post #27)... But how can we suggest u on dat?!


Title: Re: Avispad Build Log
Post by: KALYANPRODHAN on August 06, 2012, 10:17:07 AM
Snehal,
As the thickness of wing is more, you got more strength. But higher AUW require reinforcement.
But with entire 3mm 36inch wingspan Coro cessna single coro wing, I have airframe weight of 325 gm only.
Build thread wil be available after completion of thread picture. Decoration and control gear fixing is pending only.

Thanks


Title: Re: Avispad Build Log
Post by: VC on August 06, 2012, 10:29:44 AM
Snehal you wicked fellow! You missed my point entirely. :giggle:

Pictures being uploaded shortly. Please stay tuned................


Title: Re: Avispad Build Log
Post by: Snehal.Samar on August 06, 2012, 11:49:54 AM
So kalyan daa ..if i have auw under 1kg is it ok to have no spar? I assumed, spar is mainly added for dihedral wings and it is useless to add spar for no dihedral wings.
I'll waitng for the thread daa.
Awaiting vc's avispad pics.


Title: Re: Avispad Build Log
Post by: samlikespad on August 06, 2012, 12:28:49 PM
VC, bring her out... let us have a look at the beauty ;)


Title: Re: Avispad Build Log
Post by: Snehal.Samar on August 06, 2012, 12:42:53 PM
@vc .its seems dat aapke avispad ko samlikespad ki nazar lagne wali hai....keep it safe. :giggle:



Title: Re: Avispad Build Log
Post by: samlikespad on August 06, 2012, 12:47:53 PM
@vc .its seems dat aapke avispad ko samlikespad ki nazar lagne wali hai....keep it safe. :giggle:



Cant blame me for that snehal.. from the initial pics VC posted, she really is a beauty! If this is how VC builds an ugly airframe, then.... I am just eager to see his next build ;)


Title: Re: Avispad Build Log
Post by: VC on August 06, 2012, 11:23:48 PM
Whew! Finally finished her and she is ready to fly. Decals / stickers are yet to be completed. Could have done a better job but she ain't all ugly (ref post # 27) is she? :giggle:


Title: Re: Avispad Build Log
Post by: VC on August 06, 2012, 11:26:19 PM
Some more.............


Title: Re: Avispad Build Log
Post by: samlikespad on August 06, 2012, 11:32:53 PM
Like I said, beauty! VC, wouldn't it be difficult for orientation with same color on both upper/under sides of the wing? Or do you have some stripes or anything at the wing tips?

Edit: It looks more like a store bought rtf trainer (looks more balsa than coro).  :hatsoff: to you for the looks VC


Title: Re: Avispad Build Log
Post by: VC on August 06, 2012, 11:35:50 PM
Firstly I don't plan doing any funny stunts with this baby, until she falls into the eager hands of   >:D rcpilotacro who will probably be the first one to put her through her paces! However, I do plan on doing 3" broad silver / black stripes on the top surfaces of the wing, the bottom can stay all red.

Sam you were the biggest inspiration for this build. I owe it you, big time!  :bow:


Title: Re: Avispad Build Log
Post by: VC on August 07, 2012, 12:01:37 AM
Oh by the way, I removed the single servo from the dorsal surface (wasn't getting adequate throws) and added two separate servos for the ailerons, to the ventral wing surface. Spliced them to form a Y cable. Works fine now. Girish, your observations (Reply # 105) proved to be prophetic!


Title: Re: Avispad Build Log
Post by: samlikespad on August 07, 2012, 05:11:44 AM
VC, your other name in my opinion is inspiration, which I am sure everyone will agree. I am glad if I were of any assistance and eager to see her spread her wings :)


Title: Re: Avispad Build Log
Post by: girishsarwal on August 07, 2012, 10:20:30 AM
It looks beautiful VC. Love the window decals and the red hints on the prop tips.


Title: Re: Avispad Build Log
Post by: VC on August 07, 2012, 11:46:38 AM
Thanks Guys! Wish me luck for the maiden, this weekend.


Title: Re: Avispad Build Log
Post by: rastsaurabh on August 07, 2012, 11:54:07 AM
VC ... fantastic job......
Just a small doubt the wing aerofoil shape looks symmetrical in Pics..... is it  intentional ???


Title: Re: Avispad Build Log
Post by: VC on August 07, 2012, 12:41:21 PM
Semi symmetrical......by accident   :giggle:


Title: Re: Avispad Build Log
Post by: koushik on August 07, 2012, 01:02:32 PM
beautiful plane you've made  {:)} ..
Just a minor tip, try to maiden under mild wind conditions. That motor (Emax 1200 KV by the looks of it) might struggle to push the plane up-wind (assuming your plane AUW is over 500 grams ) ..
All the best for your maiden and try to post the maiden video.

Koushik


Title: Re: Avispad Build Log
Post by: rastsaurabh on August 07, 2012, 05:22:21 PM
This accident happens when we do not put a stiffener on the lower coro before putting the aerofoil shape.
( Happened it with me too)
Anyway do not think that this will create an issue have a powerful motor to take it through...... even 3D planes have symmetrical aerofoil shape.


Title: Re: Avispad Build Log
Post by: VC on August 07, 2012, 09:42:07 PM
Now that the wing is semi symmetrical, how will it affect the performance of the model? Experienced flyers please comment..................

Saurabh, how does one put a 'stiffener' on the bottom surface?


Title: Re: Avispad Build Log
Post by: rastsaurabh on August 07, 2012, 10:04:02 PM
I havent tried it yet but the best thing which i could think was to use Icecream sticks....3 -4 on the wing span parallel to chord.
Creambell sticks are best  ;D


Title: Re: Avispad Build Log
Post by: VC on August 07, 2012, 10:06:59 PM
Thanks, now where does one get Creambell Ice cream?  :headscratch:

Found some answers here. It seems that the main problem will be the deceleration at the time of landing / slow speeds......

http://www.rcgroups.com/forums/showthread.php?t=204852


Title: Re: Avispad Build Log
Post by: samlikespad on August 07, 2012, 11:18:59 PM
VC, your model is already very low on the wing loading thanks to your building skills  {:)} IMHO there is no need to be alarmed and in fact its going to help you with inverted flying soon ;) AVISPAD is an excellent trainer with very predictable stall characteristics. Landings are smooth but do keep it a bit heavy on the nose for the first few flights and it will sort of land by itself with a little bit of flaring before touchdown.

Later if you want a somewhat perfectly shaped flat bottom wing, another way is to use 4mm bottom flutes span-wise, and glue 2mm top flutes cordwise exaclty like explained in STTB.net for the debonair wing. If you are careful at the time of bending and gluing the top piece, you could somewhat achieve this.


Title: Re: Avispad Build Log
Post by: umeshk on August 10, 2012, 01:14:27 PM
Beautiful build.... waiting for your maiden video..

All the best...


Title: Re: Avispad Build Log
Post by: VC on August 10, 2012, 01:43:38 PM
Thanks everybody.Orientation stripes added.  I think I will leave it at this.


Title: Re: Avispad Build Log
Post by: samlikespad on August 10, 2012, 11:51:48 PM
Thats by far the best looking AVISPAD I have ever seen  {:)}  :hatsoff:


Title: Re: Avispad Build Log
Post by: VC on August 11, 2012, 12:25:12 AM
Thank you Master!


Title: Re: Avispad Build Log
Post by: rastsaurabh on August 11, 2012, 10:00:45 AM
Hi VC how are flutes of Coro on wing ? Parallel to Chord or perpendicular.
In case of perpendicular how did you bend with accuracy?


Title: Re: Avispad Build Log
Post by: VC on August 11, 2012, 10:35:05 AM
Saurabh, I think you've got it the other way. The flutes run perpendicular to span and parallel to chord. I used a blunt point (back end of a small paint brush) to score a line on the inside of the wing surface and then bent the wing into shape. There are some fantastic coro build videos on Youtube. You could check them out.


Title: Re: Avispad Build Log
Post by: Mjet on September 10, 2012, 11:43:01 PM
VC sir,

I almost completed the copy of your spad ;D, but pl review the attached picture and know me the dimensions for circled part.

Thanks for ur all guidence, Will post Pictures very soon.

Thanks and Regards
Mohan


Title: Re: Avispad Build Log
Post by: VC on September 11, 2012, 11:13:46 AM
10 mm should be adequate.


Title: Re: Avispad Build Log
Post by: Mjet on September 14, 2012, 10:07:51 PM
Pl  updates for flight data and  video.


Title: Re: Avispad Build Log
Post by: sanjayrai55 on September 19, 2012, 05:14:14 PM
VC

I've been real busy with work, and with today's holiday finally browsed through RCIndia. Congratulations on a most excellent build, and all the best for the maiden. The spadder in me knows she'll fly like a charm!

Sanjay


Title: Re: Avispad Build Log
Post by: sanjayrai55 on July 08, 2013, 09:16:20 AM
Whatever happened to the maiden? :headscratch: :headscratch:


Title: Re: Avispad Build Log
Post by: shauviks on August 05, 2013, 08:58:15 PM
were's the video??????


Title: Re: Avispad Build Log
Post by: VC on August 05, 2013, 09:49:26 PM
Too busy building boats to fly planes..................soon..................soon...................I hope....................


Title: Re: Avispad Build Log
Post by: maahinberi on June 24, 2014, 02:15:37 PM
@VC Sir
Maidened yet?


Title: Re: Avispad Build Log
Post by: Priyum on July 01, 2014, 11:14:40 AM
Do you have a maiden video sir?


Title: Re: Avispad Build Log
Post by: prabal276 on September 25, 2015, 07:09:48 PM
maiden video sir??