I am trying to get this arf balanced out correctly. i moved the firewall back about an inch 1/4 to fit a saito 80 on it. i'm using an onboard glow ignitor. i have all this equipment up front as far as i can and it still is way tail heavy. This is at the recommended 8 cm on the wingtip/ last rib. Does anyone know what the cg should be at the fuselage? This bit of info would make my balacing life alot easier. Thanks in advance.

ttt

[link]http://www.rcuniverse.com/forum/m_1366941/anchors_1366941/mpage_1/key_Seagull%252CZero/anchor/tm.htm[/link]

Try this thread. There is extensive discussion about the CG.

Mine flew fine with the CG 1" behind the main spar at the fuselage.

Good luck

I am building one of the zero fighters from seagull and I have some questions for those of you who have built and flown it. Did you split the rudder and tail wheel like the instructions call for? How did that work out.? Did you try using another servo for the tail wheel? Also did you use the supplied hardware? Have any of you cut the engine mounting box down to install a larger engine? I find that the OS 70 will not fit the supplied motor mount and am changing that to one of the fiber type. Did you change the upside vertical mounting of your engine to a side or offset mounting? Appreciate any and all help you can give me. Thanks