RC India

My first RC Model was an IHC Apple Box, circa 1986 or so. It had a power pod, on which I had mounted an old Fox .09 belonging to my cousin

Since then, I've always been fascinated , by, but never really got down to either flying or building one of these graceful models

Plans here: http://www.outerzone.co.uk/plan_details.asp?ID=6789

Brief Specs: 74"Span, ~1.5 kg, power by 10 nitro equivalent

I would rate this as a difficult build in corro

It is fairly complex, lots of angles everywhere  :D :D

Landing Gear is extraordinary, hand constructed

Lots of adaptation needed from plans

Wing has a double sweep (front and back,) and steep dihedral

(http://s25.postimg.cc/i9jg4ulhb/IMG_20160603_200406.jpg)

(http://s25.postimg.cc/jxiljhzcv/IMG_20160603_070527.jpg)

(http://s25.postimg.cc/nbw6lw5dr/IMG_20160603_071240.jpg)

(http://s25.postimg.cc/i6zki0htr/IMG_20160603_072040.jpg)

(http://s25.postimg.cc/6vwwtnayn/IMG_20160605_104832.jpg)

(http://s25.postimg.cc/6qt5jz3nj/IMG_20160605_163026.jpg)

Hand made cowling  ;)

(http://s25.postimg.cc/62kb114xr/IMG_20160605_163124.jpg)

Great one sir

Thanks Satish

(http://s25.postimg.cc/8k58zs3lr/IMG_20160605_201419.jpg)

Landing Gear Mount Plate

(http://s25.postimg.cc/t5k0rol6n/IMG_20160605_182656.jpg)

Main LG, single strut, 2 mm Spring Steel

(http://s25.postimg.cc/5aqttbfi7/IMG_20160605_182639.jpg)

(Washers soldered on main LG to act as one side stopper)

(http://s25.postimg.cc/98iowgrpb/IMG_20160605_182719.jpg)

Servo mounts

(http://s25.postimg.cc/tkvakp73z/IMG_20160605_201653.jpg)

(http://s25.postimg.cc/k5ff7hp33/IMG_20160606_061853.jpg)

(http://s25.postimg.cc/xiika3txb/IMG_20160606_061844.jpg)

Nice built another one coming up.

Thank you Saurabh.
Are you also building one?

Sent from my Mi 4i using Tapatalk

(http://s25.postimg.cc/98iowgrpb/IMG_20160605_182719.jpg)


Hatch Cover

(http://s25.postimg.cc/ubsm47yv3/IMG_20160606_192534.jpg)

(http://s25.postimg.cc/5wke35zy7/IMG_20160606_193633.jpg)

(http://s25.postimg.cc/3zs9cbynz/IMG_20160607_201051.jpg)

(http://s25.postimg.cc/vkl33lg73/IMG_20160607_201029.jpg)

Cockpit

(http://s25.postimg.cc/jriolmudb/IMG_20160607_061457.jpg)

(http://s25.postimg.cc/cctct98hr/IMG_20160607_192401.jpg)

(http://s25.postimg.cc/vymf370an/IMG_20160607_192413.jpg)

Next: the Cowl Cheeks (Air Intakes)

(http://s25.postimg.cc/60e7jf5fj/IMG_20160607_195513.jpg)

I think I've found the secret behind the success of Rai Saheb's models:

1. They have a pilot
2. The pilot has instruments

Congrats on your choice of another really classic plane.

Thanks Iyer sir

You forgot (deliberately? ;) ) to mention I make the pilots look like you  :D :D :giggle:

Good plane sir

Beautifull sirji

Thanks Manoj

Long way to go still  :-[

Thanks Prabal  :thumbsup:

Sanjay
The Fournier is on my to do list and have the same plan from RCM (before it went bust). Good flyer but my intent is to power with an OS 20 FS not the electric. Have also been eyeing MRM 1/4 scale kit that would be a good candidate for the OS 60 Open rocker 

Good effort on your part and I am sure it would be a good flyer.

Few things that I spotted in your previous posts
The Apple box was/is from Sharma and not IHC. IHC had the Orange box that was a design from UK. Plans available on outerzone.
The model has lot of curves not angles :) (and that is the reason why we love them curvy ones). Your biggest challenge will be the cowl rest is easy for some one like you. All the best

Thank you Captain  :salute:

My mistake: Apple Box is indeed Sharma's and the one I built was Orange Box

To the best of my (aging and fuzzy) memory, IHC had a tie-up with Mercury models of the UK, it's chief designer being Henry Nicholls

http://www.rcindia.org/rc-general-topics/remembering-henry-j-nicholls-the-mercury-man/msg176467/#msg176467

But I don't think the Orange Box was by Nicholls. The Outerzone credits  say:
Orange Box 
by Clive Smalley
from Aeromodeller
March 1979

Getting curves in a corro build is never easy. Let's see how it goes; fair bit of work done on the cowling, and turtle deck planned too

Thanks again for the encouragement Cap'n  :salute:

I am still eagerly waiting for the wings to come up Sir. Nice one.  :thumbsup:

Thanks Colonel saheb  :thumbsup:

Sanjay yes right, while there were a lot of classic Mercury and other models being kitted by Aurora not all were Mercury or HJN product.
For example the Schoolmaster by Ken Willard of US underwent a gender change with Aurora and became Schoolmarm   

That apart, besides all the Gnomes Mentors Marauders Magpies, there were also the beauty Queens: Miss Universe & Miss World  ;D Plus a decent Citabria

Now on the Fournier, the plans say 4"of Dihedral. It does appear that is each side, making a total of 8". Any ideas if that is correct? Also, in the RCM/Outerzone plans there are no ailerons, but I will be adding half-span ailerons. Should I reduce the dihedral or use the same 8"? Yes, it is needed for rudder turns, especially at lower speeds, and I typically use ailerons only for levelling the wings preferring to turn with rudder

Cheek Cowls (Air Intakes) plus cowl combine together

(http://s25.postimg.cc/7nclw4w8v/IMG_20160608_183303.jpg)

(http://s25.postimg.cc/5wtkunepr/IMG_20160608_061830.jpg)

(http://s25.postimg.cc/4j1xzcfgf/IMG_20160608_061824.jpg)

I've used an NTM 2836-1200 KV and plan a 10*6 prop. The original used an Astro 10, this is more powerful, 300 W on 3S compared to 200-220 W of the Astro 10

(http://s25.postimg.cc/so2nh1zr3/IMG_20160608_183822.jpg)

(http://s25.postimg.cc/kwlxihvlr/IMG_20160608_183250.jpg)

Trial fit

(http://s25.postimg.cc/m1kl1m7gf/IMG_20160608_192202.jpg)

After a couple of coats of Sand Sealer and some sanding with #400 grit

Girish says it looks like a plucked chicken.I say he has a fowl mind ;)

(http://s25.postimg.cc/dxcgwvl1b/IMG_20160609_062937.jpg)

Sir, I am a vegetarian and pardon me,  >:D it looked the same as was told by Girish, and that too before going through the comment  ;D ... I have seen them so many times at the Charminar area during the Ramzaan season. I could not control the laughter  :giggle: :giggle: after going through the comment !!!! :rofl: :rofl:

Yes that is 4" under each wing tip and do not forget the washout.
Since you are using ailerons you can safely reduce the dihedral. With a dihedral wing the rudder induces a rolling moment as well. How much to reduce? I would suggest to to 2 1/2" or even 2" under each wing or look for other Fournier plans with ailerons to see what dihedral they have and interpolate from there. Remember with the original dihedral the aileron will have very reduced authority
Some reference material, hope these help
http://www.rcgroups.com/forums/showthread.php?t=431446
and
http://www.modelflying.co.uk/forums/postings.asp?th=33894&p=3
As for the cowl cheeks above are you planning to hollow them from inside? I suggest you can if you do not need nose weight. You can go really thin and line the inside with glass cloth and epoxy    

Thanks Captain

I was planning to go with 3"each side, but will review again

The Alpavia, based on the RF3, has a 56"span, no ailerons, and 4 1/2"dihedral each side

For the turtle deck, I'm using 400 gsm chart paper, spray painted one side

(http://s25.postimg.cc/uz5ayyzwf/IMG_20160609_132614.jpg)

That may not be an apt comparison, as the dihedral will also depend on the fin/rudder size. If you refer the plan for 56 inch Fournier  by Peter Miller on Outer zone you will see the dihedral is 1 3/4 each wing and the model is aileron equipped as well.  

Plan to start the wing tomorrow. Will sleep over it  ;)

Make sure you do not sleep over the wing once constructed. Sleeping with may still be ok ;)

Another nice build coming up Sanj.

Thanks Dee  :)

Sent from my Mi 4i using Tapatalk

Mater piece, sir
I love those cheek cowls.

Thanks so much Manoj. Still a long long way to go  ;)

The "Plucked Chicken"has now become "Tandoori Chicken" :giggle: :giggle:

(http://s25.postimg.cc/4ha36c11b/IMG_20160612_102535.jpg)

(http://s25.postimg.cc/ke8v31tfj/IMG_20160612_102559.jpg)

(http://s25.postimg.cc/x9gupt8ov/IMG_20160612_172403.jpg)

(http://s25.postimg.cc/k41cjpetb/IMG_20160612_172410.jpg)

Started the wing

Finally decided to go with 3-3 1/2" total dihedral

(http://s25.postimg.cc/3ms4y1ikf/IMG_20160610_123819.jpg)

(http://s25.postimg.cc/48cigeo8v/IMG_20160610_123830.jpg)

(http://s25.postimg.cc/yefi8xkjj/IMG_20160611_202421.jpg)

(http://s25.postimg.cc/ctaflbnsv/IMG_20160612_182230.jpg)

(http://s25.postimg.cc/4g4qqnolb/IMG_20160612_182245.jpg)

(http://s25.postimg.cc/8zgzc66gv/IMG_20160612_183622.jpg)

Note the 1/4"thick packing in the above picture to get the washout

Here's the washout post wing completion


(http://s25.postimg.cc/6yqfrcabj/IMG_20160613_043700.jpg)

(http://s25.postimg.cc/7lpcgv77j/IMG_20160613_043606.jpg)

(http://s25.postimg.cc/6yqfrcabj/IMG_20160613_043700.jpg)

Sir;
excellent and a very neat build.
looking forward to the maiden.

Regards

Sir  you are going to have another un maidened planes..... Cub (DFR) still waits for sky's.
I think this is the biggest Wing span of your creations.  Eagerly  awaiting for maiden.
29 or somewhere else?
What dihedral did u finalise.... Not clear in pics.

Saurabh

I don't think it will be unmaidened, and neither will the cub

I will fly this in 29

Dihedral is specified in reply # 49, and a picture is in reply # 52

Wing Skids

(https://s25.postimg.cc/l4sv0pxz3/IMG_20160613_200640+- Copy.jpg)

(https://s25.postimg.cc/6a49mjoe7/IMG_20160613_200647+- Copy.jpg)

Trial Assembly

(https://s25.postimg.cc/5lvf3lpof/IMG_20160613_201124+- Copy.jpg)

(https://s25.postimg.cc/an7eipmin/IMG_20160613_201147+- Copy.jpg)

(https://s25.postimg.cc/g9z62fznj/IMG_20160613_201134+- Copy.jpg)

(https://s25.postimg.cc/s31kkelhb/IMG_20160618_195628_HDR.jpg)

(https://s25.postimg.cc/gpf197ayn/IMG_20160618_195605_HDR.jpg)

(https://s25.postimg.cc/ldv14e05b/IMG_20160619_050019_HDR.jpg)

wow  :thumbsup:

Thanks Manoj  ;D

Thumbnails ahead. Click on the picture for full size

(https://s25.postimg.cc/3sx3t0tvf/IMG_20160619_113334_HDR.jpg) (https://postimg.cc/image/3sx3t0tvf/)

(https://s25.postimg.cc/xwbmkyx4v/IMG_20160619_113309_HDR.jpg) (https://postimage.cc)how do i print screen (https://postimage.cc/app.php)

(https://s25.postimg.cc/g8ttmrn7j/IMG_20160619_113435_HDR.jpg)

(https://s25.postimg.cc/c0z1e0lrz/IMG_20160619_113442_HDR.jpg)

(https://s25.postimg.cc/ewgpymf5r/IMG_20160619_113452_HDR.jpg)

Great craftmanship Sanjay sir, she looks too good {:)} {:)} {:)}

Prashant many  :thanks: for the kind words

Sanjayji as always this is a fantastic build.... At the same time I am completely confused which of your models should I choose to build....all are equally enticing to build.  Simply Awesome!!!!

Thanks buddy  :thumbsup:

Here's a suggestion - build all  ;D

Good one  {:)}

nice :hatsoff:

 :thanks:

Thanks Captain

Maiden  8)

(https://s25.postimg.cc/hjl35axj3/IMG_20160710_061541_HDR.jpg)

(https://s25.postimg.cc/dohp2qedb/IMG_20160710_061601_HDR.jpg)

(https://s25.postimg.cc/4hzefg94v/IMG_20160710_061947_HDR.jpg)

Very graceful model....... Both in looks and flying..... Guiding a 1.5 kg model is well achieved by 74 inch wings

I have seen the maiden video on what's app

Flight Report:

For a maiden, it was remarkably smooth. Just needed a little uptrim. I wanted to hand launch, but then decided to do a ground take-off in case I wanted to abort

Battery consumption is very low. I used a 3000 mAh (for CG reasons) and as per my wattmeter was left with 87% battery after 3:34 minutes. This was exclusive of initial testing. With this battery, 2-25 minute sorties are a reality :D

My aileron throws, at low rates just 12 mm up and 8 mm down, were too high!! Granted one needs time to get used to the model, but it could turn on a 1 naya paisa coin  ;)

Landing: knocked me for a Six! Just kept gliding on and on and on  :o  Finally landed in a puddle of keechad

But what a pleasure to fly. Fast, very fast. I was flying at less than 1/3rd throttle, but still fast! And graceful, very graceful. Really u-turned my concept of Gliders

Thanks Saurabh

And, here's the video: (watch in HD)

https://youtu.be/7YSm6pYuGDA

Great plane sir.

Many thanks to Prabal for the video recording, and resounding moral support  :thanks:

Thanks Maahin :D

Now I have to figure out the 'slip' method you advised to reduce speed and height for landing. Flaps of course can't be fitted

Great flight  :bow:

You are welcome sir!
though Videograpgy was not the best but is okay.
An excellent plane.
Tempting to try out the smaller version
Regards

Saw the video only now, as it didn't run beyond the first few seconds earlier.
Sirji,
Yeh to Glider kum, aur Fighter jyada lagta hai!
Not tried with power off yet?
Regards.

Thanks Rohit  :thanks:

Iyer sir

Thanks. Yes, it does fly pretty fast; except the take-off I was flying at less than half throttle!

Oh, and it glides - endlessly :D

Drove me crazy while landing -just went on and on and on!

@sanjayrai55,
Just went through the whole thread and video again.
Was thinking she flies more like my aerobatic Pilatus B4 than the Sunbird.
Was going to suggest you try aerobatics rather than soaring, but before that i Googled RF4.
Guess what i found?
The RF4 is the aerobatic version of the RF3 ;D

So, ladies and gentlemen,
In the next video from Rai saheb,
Expect shark teeth and inverted low passes at high speed with red and green smoke from wingtips...

 :rofl: :rofl:

I wish, Iyer sir, I wish  ;D

Many thanks to Kalyan-da Pradhan for updating the links

Sirji,
Since you liked that Turbine Fox so much, we await “inverted low passes at high speed with red and green smoke from wingtips...”

Iyer sir! At my age?  :giggle:

Enjoy, guys

https://www.youtube.com/watch?v=hVKZg842hZo

So far I’ve only seen pics of you in half pants...
And coupled with your numerous and prodigious builds,
I expect you are young enough for high speed inverted low passes...

Aah Iyer sir, if you think I am young (not younger ;) ) then you are a really nice man

A few years ago I would do crazy aerobatics. But now, I'm content with just building and flying

Flew this again after a long time

https://youtu.be/VAKvMZ1ndDY

Flew this again after a long time!

Here's the landing

https://youtu.be/VAKvMZ1ndDY

Ground is in a bit of a rough condition - no attention during the lockdown!

i missed this thread but excellent build sanjay sir

 :thanks: