lovely model, my son loves it. Thanks for the plan
have a look at these videos, 10 year old flying this lovely model
http://www.rcpak.com/index.php/video...ime-of-my-life

http://www.rcpak.com/index.php/video...rab-and-let-go

I just built this model using 1.3# 6 mm EPP foam. It turned out really flimsy and would have been better using 1.9# 9 mm foam but the 6mm is all I had on hand. It weighs 185 grams including 2s battery. I flew it today for the first time out in front of the house and gave the neighbor kids a thrill. It flies great.

I wish my kid would get into flying the one I built for him but alas it seems RC can't hold a candle to Xbox for a 12 year old. On a plus side that is some great flying from your son there Turbo.

Sorry for bringing up an old thread, but I just wanted to drop by and say thank you to Spitfire for the plan. I am a beginner 450 size heli flyer, and have no experience with planes at all other than computer sims. I managed to build this sbach with KF stepped airfoil and have successfully maidened her!!!

Thank you!!!

Dollar Tree foamboard scratch build SBach 342 maiden flight (9 min 37 sec)

Specs:
Wingspan: 840mm
Length: 889mm
KF two-stepped airfoil at approx. 40% chord length
Flying weight including battery: 430g
CG: 263mm from tip of fuse (not tip of motor or prop)
Control surface throws: 40 degrees for all.
150W motor with 8x4 prop
Hovers at approx. 55% throttle (0-100 scale)
High alpha moving around at approx. 40-45% throttle


Materials:

Airframe:
2 x 20*30" Dollar Tree foamboard @ $2
1 x 3mm carbon fiber spar @ $3
A few popsicle sticks for control surface horns
Small length of galvanized steel wire as push rods.

Electronics:
1 x Zippy Compact 1000mah 3S 35C battery @ $5.5
1 x Turnigy D2822 1450kv motor @ $8
1 x 30A generic ESC from Ebay @ $7
1 x FlySky 6ch receiver @ $9
4 x HK15178 10g 1.4kg servos @ $8 ($2 each)

Radio:
Turnigy 9X v2 with open9x firmware.