Just want to add something; when you are trying to exit on the downline (last 1/4 of the loop), you will need about 1/4 throtle (no throtle, no recover) if the plane has a fair amount of fuse area, if not, maybe 1/2 throtle is needed, also, don´t use 45 deg elevator with 45deg rudder or your plane will want to snap, a little less elevator may help

Daniel