Added flat-bottom thermo aerofoil to the flat coro wing. Also, the wing now has a 3^o dihedral.

And now it's a high wing too!

What is the current weight of the a/c?

It must be around 800 gm or less...

you still need to lose weight i guess. Because i also tried to make a coro a/c one it had no extra parts to it, not even wheels still it didnt fly, but again the thrust to weight ratio was bad, i really suggest you find out the thrust to weight ratio. Because of the motor setup i have i know that the assembly alone doesnt have a 1:1 thrust to weight ratio. Thats why i used depron and "airfoil".

Check out http://www.rcgroups.com/forums/showthread.php?t=1377724 for a discussion on Flat Wing Aerodynamics vs Airfoil

Power to weight ratio = 243/1.76 = 138 Watts per pound.

Thanks for the link!

According to one of the people i discussed this matter (long time back) 138W per pound is comfortable.
Also find out the wing loading using this http://adamone.rchomepage.com/design.htm
And compare with http://en.wikipedia.org/wiki/Wing_loading (you'll have to change the units)
What values come?

Attached pic of the wing loading (weight taken as 700g).

The cubic loading comes out to be 8.73 oz/cu.ft. And the range for  trainer/ sport type models given on the website is 7 to 9 oz/cu.ft.

Thanks for the links again! 

here's the wing loading data...

Hi swapnil!

Great Build! isn't the airfoil too flat in the front??? I think it could be rounded a lil more??

I know, but the the airfoil base is made of coro and can't be rounded. Also, it's a close-up shot, it looks O.K in real.

  all the best for the flight! 

Happy Landings! 

Thanks!
It's rainy/ windy here all the time these days. Hope to maiden it soon.
And thanks for the advice, I'm not much into maths or deep-study of aircrafts.
Just wanna fly!

hey swapnil. I just remembered a great idea, which i used to do. It really helps.
Remove the break-able parts of the a/c, replace with equivalent weights, now if u want to find something of the equivalent weight, use a 30cm ruler, place your known weight on one side and a dead weight on the other, and try to balance everything keeping 15cm as the pivot. u can use cells, tubes or anything as dead weights.
Now strap all the dead weight on the 1/3 line and launch it (gently). u can tape the elevators up a bit, and its your choice where u want to land it, ground, grass or any person's hands.
This will accomplish one very important thing if the battery fails, will the a/c land safely or will it fall like stone. You will also be able to see how the airfoil effects the flight.

Really good idea, will certainly try it. Can't do it right now as I don't have enough space indoors and everything's wet outside.
Thanks and keep the tips coming!