Tail spin

[GoogleCodeExporter]

What steps will reproduce the problem?

1.APM 2.5 with Arduplane 2.78b on HK Sky Eye => Tail spin and negative pitch 
till crash in stabilize & auto mode

2.The recovery action only by putting the APM in manual mode 

3.My suggest to fix that issue in APM code: When fly in any flight mode except 
manual mode, when the pitch value exceeds a set negative value ( let's say 
minus 75-80 degrees descent rates - in other words, the plane put the nose down 
and spin ) the code should disable the command (the compensation ) to the 
aileron channel (by putting the aileron in manual mode) , until the pitch value 
reach a decent value for a normal fligh . In that way , I say that the APM will 
do exactly the action that I do to recover when the plane is in tail spin => 
Fast change to manual mode and try to level the plane using the elevator. 

BTW , I had the same issue at all flight controlers that I used, but in this 
case, using the open source APM's feature, maybe we can get rid of this problem 
flight.

Best regards,
SOLOM Gheorghe
Constanta, Romania

Original issue reported on code.google.com by ggsolom on 5 Apr 2014 at 5:26