Originally posted by klgan
Hi
I've just scratch built a fun-fly plane (40-size).
When I apply full-rudder on leveled upright flight, the plane started to flat-spin a little but then quickly go into a roll!
What makes a 3D plane flat spin?
Appreciate any tip!
Thanks.
Flat spin . .
Get into a good spin (that is, one that started with the wing stalled and the engine idling) using a bit of aileron in the same direction as the full rudder (and full up elevator). Slowly move the aileron in the opposite direction to the rudder, slowly opening the throttle, while it's spinning like crazy.
You should find the spin flattens out, if it's capable of it,.
An inverted flat spin is the same, but with full down elevator.
Mind the ground!!
-David C.