There are a few models in both FMS and RCFS that you can invert and flat spin almost indefinately. Idle throttle and down elevator and they just drift like helium balloons. The 2000 version of RCFS would flip into an unrecoverable spin for models like Cap 232s and Pitts biplanes. Not quite how the real birds react. One (I can't recall which) had many models, warbirds included, that would land just beautifully every time if you cut throttle completely and applied full up elevator. Uh huh.

I must say the Sopwith Camel in the latest FMS is a handful (just as a scale model would be).

Worst part about FMS is that most of the WWI bipes seem to be electric and without . . . enthusiasm or charisma.

Sims also remove many pressures that can cloud judgement and complicate real flight. Imagine turning on your sim and seeing "frequency pin out - please wait 15 minutes and try again." Or, "Club loudmouth Joe Nemisis has just been overheard telling another flier that you fly like a lilly livered chicken turd and would NEVER try an inverted low pass in this much wind".