ORIGINAL: santiagotor
I am flying a 27% Extra 300 with a DA-85 Engine and having the following problem. I am starting to try a littel more extreme manuvers as harrier, the wall etc... but.... alevator is untouchable, as soon as I try a hard elevator manuver, the plane snaprolls to the right violently. As soon as it stalls, the same thing. CG is Centerd
What could I be? Is this normal?
What test could I make, or is it just inexperince and neet to practice to control this behavior?
I disagree completely with anyone who says this is normal or due to inexperience
NO IT IS NOT NORMAL. If anything, a properly trimmed and aligned airplane should snap LEFT due to slipstream and p-factor. These usually over-rule the right yaw created by the gyroscopics unless you have a very heavy prop.
I suspect u have some rt yaw already built in somewhere. The first thing I'd try after re-checking for proper rigging etc in the tail group and wing is to start adding left rudder trim incrimentally, compensating with rt ail trim to keep the wings level, and repeat your hard pulls. Eventually you should reach a trim condition where it accelerated stalls go staight ahead and snaps one direction ot the other based on your whim, not the airplane's.
I have solved the problem of uncommanded snaps and hard rolling stalls on two models recently using this method.