RC India

hi all

       I have made one plane.i need your help for further electronics.
weight of plane about 120-150g(without electronics).I do have Tx & Rx.
Battery i am havin is 2s 800mAh.I need esc servo & motor selection help.
Is ESC is imp for connecting brushless motor?  :headscratch:
http://homemademachines.webs.com/projectlist.htm (http://homemademachines.webs.com/projectlist.htm)
The wing span is 720mm
Length is 680mm
chord length is 120mm
Flat base airfoil is used
for horizontal & vertical stabiliser i have used 3 mm coro
stick is Indian teak
wing made from Thermocol brought from local stationary
First i tried by rubber band power.
it fly 5-6mtr or little more

engineer .... electrical/electronics/civil  ???

Mechanical

i think you are one of electrical/electronics/civil

no iam not ...an esc is very much required to run a brushless motor , also try any motor with a minimum thrust of 400 to 500g ,
before you load on the electronics  calculated and mark the cg on ur model

ok sir thanks for helping
 :salute:

thermocol wings are very fragile, Learners should focus on a more durable item like EPP

what is EPP :headscratch:

http://www.lmgtfy.com/?q=EPP+material

 Hi rajesh

post some pics of ur model {:)}

yes sir i have already posted
http://homemademachines.webs.com/rcairplanes.htm (http://homemademachines.webs.com/rcairplanes.htm)

I do have propeller of 6x4 for this plane is it going to work or have to choose another one.

Hi Rajesh, I just saw the pics on your website. Good build!  :thumbsup: I liked the movable wing.

Like 'hangingtough' said, thermocol wings are fragile. And I think you don't have access to EPP either. Why don't you build a coro wing instead? It is strong and durable. I can tell you in detail how to build a light-weight coro wing if you want to try.

Also, to make the fuselage lighter, drill holes of appropriate diameter along the length of the 'teak-wood' stick. That's always worked for me.

yes definitly swap i was also thinking of drilled holes

if you tell me how to build coro wings it will helpful

Do you have 3mm coro or 4mm coro?

i do have 3 mm coro

For 3mm coro there is a standard method where you fold the coro sheet on itself and adhere a wooden stick parallel to the leading edge and standing on the coro at 30-40% chord to get a symmetrical-airfoil wing. But you'd get a bit heavy wing.
Instead of wood you can use a coro stick to get an even lighter wing. Coro stick can be built by joining two 1in. wide 4mm coro plates.
Then there is another method which gives even lighter wings if you want a KFm airfoil.

what is "KFm airfoil"

KFm airfoils are really simple designs. I've worked with the first three and they work good. KFm-2 has the second best flight characteristics after symmetrical airfoil. I've attached a pic.

Also, if you want details of the first method, watch the 4th video (i.e part4) at this link: http://www.rcindia.org/beginners-zone/spadstick-build-video-tutorials-(by-draftman3)/

thanks swap it was very helpful
i will try for coro
you do have 20A 2-3s ESC for sell
if anybuddy have plz tell me.

hello sir i need ur help m from nagpur i want to design plane please send me your contact no.. my no. is 8446573776

Sent you pm. Please check.

Thanks Swapnil on the KFm airfoils. I have copied that on one of my spads (yet to fly), having got the idea from one of my colleagues but needed some technical data to back it up. Your post did it.

Cool! Do post some pics of your plane so everyone can learn about KFm.
Also we'll be waiting for your maiden video! Good luck!  :thumbsup:

Sure Swapnil!