Hello all, i'm very new to rc planes and have got myself a firebird xl which i am really enjoying flying but.........

i can get the plane to about 40' high, and at this height it will happily cruise around on 1/2 throttle until the battery runs out, but when i apply more throttle to climb higher the nose goes up and it then stalls and i lose altitude.

i have tried everything the manual says with no luck, could this be a problem with the CG?

i am tempted to move the battery back a little but i need th o know what you guys think.

thanks in advance.