this is my first attempt to build a rc plane.....i have got some pics of that......specifications are ---
lenght=63cms
wingspan=80cms.
pl people let me know what else is required to make it fly??

you made this? what all did you consider before making it?
I did not understand what you mean by

Maserati, that bird looks odd man. By odd I mean the ratios of the dimensions of your plane (chord to nose, chord to tail etc). The horizontal and vertical stabilizers are too small as compared to the size (i.e area) of the wing.
Could you post pics of the plane from other angles and details of the power setup you are using?

Please use meaningful topic names for your topics, and not just "help needed".  A large percent of the topics here involve some looking for help, so that as a topic name would be too generic.

And +1 to Swapnil... please post more details on the plane, so that others can make valid inferences. 

Kudos for trying to build it yourself though !

in your thread
http://www.rcindia.org/electric-planes/help-with-selection-of-parts-for-beginner-plane/
Swapnil posted
Even i posted

Did you use the info posted there to build the a/c?

You can also use the preflight tests
http://www.rcindia.org/wiki/Preflight_tests
i wrote that page if you have any confusion you can ask.

Hey Great work as a first timer . Do you have any one near you who fly ? Best thing is to get the help of a flier who can guide you to modify a little bit on the tail part and check th CG etc. All the best.

Nice work and great to see another 'builder'.

Anyway, as the folks are saying the dimensions do not appear correct. So in case you need assistance, do drop in at Noida field on Sunday and am sure we would be able to help

Pankaj
 

here are  some more pics.and thank you guys for your reply...

Good going...
Some more things to keep in mind-
Your control rods need to be straight and stiff.
You need to increase the size of the horizontal stabilizer and the elevator.
Where is your CG?

please let me knw the correct method of finding CG of my plane?amd how to balance it?
thanks...

Here's what I noticed:
1) The airfoil shape needs to be corrected (from what I can see in the 1st pic). Could you post a side view?
2) The wing seems to be drooping a bit.
3) I can't see any ailerons. Are you planning to add them later?

For determining CG, check this site out:
http://adamone.rchomepage.com/design.htm

It will also help you in correcting the dimensions of the horizontal and vertical stabilizers.

what can be done to keep the wings in straight position?
thanks

Just try to balance the a/c at a distance of 1/3rd chord from the leading edge.

Use reinforcements like wooden spar, carbon fiber etc.

cycle spokes too can help sometimes

thnk you all for replyng...iwl fix it and wll post sm pics for ur further suggestion

also can anyone let me knw whether i can get a readymade wing from anywhere?
thanks

Readymade wing? Why don't you simply get an ARF instead?

lol

i have a eco six balance charger....i wanted to that,when i charged my lipo  with it giving it 12v 2amp  dc supply,there came an error on its screen.as a result my battery didnt charged...pl help
thanks

Could you give details of battery?

it is zippy 20c 3cell  series and 1800mah.

I think there is a problem in your dc power supply.May be the output of ur dc supply is not sufficient to charge the battery.Try another dc power supply of 12v and higher than 2 amp.

here are 2 more pics...i have made some modifications.added dihedral angle to the wings..
im  nt able to attach tail wheel..dnt know what kind of wheel..websites are offering really costly ones..pl help..
thanks..

From what I can see in the pic (016), the dihedral angle is more than required for an efficient wing.
Dihedral angle should be between 3^o to 5^o. Too much dihedral results in less lift.

@maserati, maybe you should go through a couple of articles on aerodynamics and model-airplane building; that would save you both time and effort.

Good to see yet another aeromdeller in the circuit, just check if your wings are balanced. I see excessive duct tape on one side.
Just my 2 cents!

thank you all for your replies......
im a beginner, i just want to mke this thing perfect so that it flies.it will give me confidence so that next time im able to design a better one.
pl let me know the substitute of costly rear landing wheel...
thanks

try a DIY landing gear,
Attaching a picture for you to get an idea!
Things you will need include a plastic plate, a spare wheel and superglue.

THANKS for ur reply....it will surely help me..

Hi,

Attached is the picture of Cessna foam wing which is almost brand new.

It is having aileron function to make your plane 4 ch.

Friends..its a great article...helped a lots...thank you all..

Hey, looks like rcelectro.com now offers custom laser cutting service! Maybe you can get a readymade wing from them.
Check it out here:
http://www.rcelectro.com/
 

thanks for your help.....

Swapnil..i tried to many links got from our forum to get a ARF kit for a plane..but i couldnt find a way to purchase..will you give me some idea to buy some materials from any outlets..is that due to my basic internet connection..?will you help me once...?

hi,

check the post under sellers

Most popular / best price is  www.hobbyking.com in hongkong.

or leadershobby or www.ebay.com

there are many indian retailers also check the head

thank you Sir..as i do not have any credit card..looking for an option off India is not an option...so i tried to make some orders in Indian sights..but no one is responding...oh..no...

Roopesh sir, I haven't purchased an ARF kit yet from any Indian shop. But I have purchased electronics and building materials from RCDhamaka, RCelectro, rchobbyaddict, rcforall etc and I can help you with that. If you need help buying an ARF kit you'll have to ask a senior (say Augustine sir).

Thank you Swapnil..i will contact some seniors, just Augestine Sir, or VC Sir once to clear my doubt..thanks for the advice..

Like mentioned on the field today....

1) The wing is too soft. If you hold up the wings from tips it nearly fold up. So some serious stiffeners are required
2) The dimension of the tail fins are too small compared to the wing area - keep it at 20% of wing area
3) Battery is too big for this bird. Should not be more than 1000mAH

Maserti
You are wasting your time on this bird. Scrap it. Build it from a plan, whole lot of'em on the net. Once you gain confidence inflying and building go for self design. Hopefully by then you'll understand stuff. Sorry to break it you, brutally

sir ,thank you for your reply..i will definitely do so..

With all due apologies to Gusty:

Once upon a time, a poor Bumble Bee, who could not afford to go to school, was happily buzzing around doing whatever the bees and birds do. He sees a curious group of children staring at him, they were students from a nearby school. He asked them if anything was the matter. They gasped in astonishment, "What a surprise Bumble Bee, you can fly!"

Bumble bee was taken aback, "What is so surprising about that?"

The students hemmed and hawed, till one little boy spoke up and said, "Well you see, our Physics teacher told us that your body was too fat, you weighed too much, your wings were too small and couldn't provide any lift to your overweight body. In fact, he told us, it would be IMPOSSIBLE for you to fly by all the laws of Aerodynamics!"

Bumble bee smiled and replied, "Thank God, I never went to school, or else I would have been WALKING up and down wondering why God gave me wings in the first place. I would have never TRIED to FLY."

Maserati, Augustinev is a champion aeromodeller and a crack fighter pilot. While I think you should heed his advice very strongly, I also feel that you should definitely go ahead and give this baby one try before tossing her away.

Or else, you will wonder all your life, "Was I that wrong? Could she have flown - just a little bit?"

The best way is to FIND OUT FOR YOURSELF.

All the best!

sir thaks for boosting my moral..

Masseratti..fixing a tail wheel on to an aircraft is not a serious issue...buy a simple Chinese toy car, with soft plastic wheel,that you can find in many type and sizes, costs around 10, or 20 Rupees, and remove one of the wheel, and buy some steel wire, used to bind umbrella hubs, can get from good hardware shop, will be thinner but strong. you can fix this wheel, by making an angle at the tip of the wire, and can fix the wheel by adding two simple piece of ball pen reffil with epoxy.fix other end on a piece of soft wood and glue to the fuselage.

VC, I have seen this bird and I'll go with augustinev.

I would agree with you. All I am saying is give this bloke a chance. Atleast guide him on what the dimensions should be. If the Horizontal stab area has to be increased  - tell him by how much. If the bird needs a bigger tail, how much? If the distance between the TE of the wing and the LE of the Horiz Stab is too big, how much should it be?

I wish I was confident of my knowledge, I would have called him up and helped him. That is what I am sad about today.

masarati, with due respect to all the others who is trying to help you, I have seen a guy flying a plane made similar to yours but with a wing made of soft form wrapped in insulation tape. At first I thought the guy is a joke, but realized my mistake once I saw it flying. But in his case, the wing was sturdy and had an airfoil shape. I suggest you to reconsider a more appropriate material (foam, corugated plastic, etc.) and you could try an under cambered wing to make it weigh less. You definitely have to reconsider the size of your horizontal stab as its too small. All the best man... keep going

All that I am saying is that sometimes, our eyes and our natural instincts get fooled due to the inputs from our brain and our acquired knowledge. If these can fly, then maybe Maserati’s bird can fly too – at the very least it looks like an aeroplane!

thank you once again sir for your ur kind support......

VC Sir..its awesome...

I thought I will keep it simple. With all due respect to our poet VC ( VC ! Couldn't resist) and bumblebee stuff. In aviation , after an airplane is made. The best of the airframe designers, engine kingpins and avionics Guys are called. They go through the design, and give an independent view. If all of them unanimously pass the design, the airplane goes to the Tarmac. Else it goes back to the drawing board, . Maserati, you airframe is flawed, badly. Since you are on a budget I didn't want you to break your prop, mount and may be bend your motor shaft. The reason for telling you was simple ' save  money' , do flat outs. Plenty of plans on our forum and on the net. Sucesss rate is high. I wouldn't allow your airframe on the Tarmac. Bumble bee sounds poetic, in aviation you need to work from your head, while feeling good from the heart. Listen to the birds and bees, and you are sure make a mistake, worse, discouragement shouldn't take u away from the hobby.
Just a friendly advice.

sir can u tell me about kfm wing design......
thanks
hitesh

Go with flat outs like a Su 30 or something like that. Kfm? Later. Search this forum, you will find your answer. Keep it academically orentientd as far as Kline foggleman s concerned.

"poet VC"

Gusty, just you wait.............

"In aviation , after an airplane is made. The best of the airframe designers, engine kingpins and avionics Guys are called. They go through the design, and give an independent view. If all of them unanimously pass the design, the airplane goes to the Tarmac. Else it goes back to the drawing board"

If we were to follow all these parameters, we would be better off building static display models! What's life without a bit of experimentation and suspense, eh Gusty me boy?

Which airframe designer would ever dream of certifying this as airworthy? However, the proof is in the video....................

Hi Guys,

Just to break the suspense ... here goes....

Last week Maserati visited the Noida field to take suggestions and have the plane test flown ... I myself looked at the plane and due to the construction, way it was built, material used, battery etc etc ... it was totally non air worthy ( sorry to be so direct), just to pump the emotions I tried taking it in the air but boy was it like mission immposible, the wings would flex if you were to whistle at them leave alone taking the thrust from the spinning prop.... Maserati was given advise by Pankajc a superb scratch builder who visits the field often..... I told Maserati exactly what Augustinev had to say that is learn to fly understand the controls and the mechanics and then start building your stuff.... best of luck Maserati... I am always there if you need any help...

His plane might not be airworthy now...cant we help him fix it and give it a last try? A properly built wing (suggested under cambered to reduce weight) and a wider horizontal stab might make it airworthy. How good it might fly is some thing else...but it might fly once he fixes the probs (wing, horzntl stab, control rods, etc.).

Gusty sir, I'm curious about the KFm airfoils too. I couldn't find much about it here. It would be great if you could start a KFm dedicated tutorial thread when you get your net connection.
I tried building a KFm-4 wing. Please tell me if it's correct and what modifications I should make. Here's what it looks like:


 

Hitesh, I'm a beginner too and I faced the same problems when I started some time ago.

Then I stumbled across Vaibhav's 'Model 1' (1st pic). It's a rectangular planform and seemed really easy to build and fun to fly!
I built it that evening in 3-4 hours! And I've had a really great time flying it.

Now this sort of plane is not recommended for beginners as it can be difficult to control. But if you are really itching to get that awesome feel of flying you could try this one. Just make sure you have a couple of spare cheap props!

The first pic is Vaibhav's 'Model 1' (depron) and the 2nd one is mine (4 mm coro).

http://www.rcindia.org/rc-general-topics/kf-airfoil/

See the links in this thread (not just the first one).

Thanks, anwar sir! I guess I didn't search properly!

swapnil thanks for your help.......

Folks,
Have been on PM with Maserati for a few days. Have asked him to collect some information and raw materials and then plan to help him build a bird. The only issue here is that I am out on a tour and return after a couple of weeks
Pankaj

sad...  :

That's why i was advising him to not to take the bird up and waste money, poetic is fine, got to be pragmatic in aviation,