bobby crashes my planes

i want to build a gp spectra but i want to change the wing first i want to only use the dihedrial (sp) from the center of the wing seconed i want to put alerions on it and third i want to put spoilers on it i have it all planed on how to do it but i wanted to see what other people thought i think it will work but i would like to here what you think thanks

BMatthews

With ailerons yes it'll be fine. Something to consider is that the fin and rudder is sized for the polyhedral wing. It may well be a little large for the reduced dihedral. If it is the what you'll find is that once put into a turn that the model wants to tighten up unless you hold a little to a lot of outside aileron for the whole turn. This is called being spirally unstable and actually comes from too large a fin area on too long a tail moment. So keep that in mind and if it turns out to happen to you then you can make the model more neutral by cutting down the size of the rudder and fin. When it's just right the model will tend to level itself from shallow banked turns and only need a little bit of "top" aileron in steep banked turns.

If you go too far the other way then you'll find that the model wants to hang the tail low and sort of skid or side slip in the turns and you'll see more signs of adverse yaw when using the ailerons to roll into a turn.

bobby crashes my planes

thanks for the input when i start building i'll post some pics so you can check it out any ideas on spoilers i think they will make the plane eaiser to land because the one that i have noe when i flair it about 3 inches off the ground it starts to fly again thanks again

Mike Ledbetter

The tail moment on the Spectra seems very short to me.

Does anyone know if a Spirit Elite Wing will fit a Spectra fuselage?

bobby crashes my planes

i'm not positive but i think there the same i'd go to www.greatplanes.com and look at the specks for them

bobby crashes my planes

well it's done check out my gallery for pics