Learjet stall recovery with full aileron deflection

[hvogt]

In the video below (starting at 36:30), a brand new Learjet is stalled during a test flight. During recovery, the pilot makes rather violent and full aileron inputs, and I ask myself 'why'. My first guess was the crew wanted to ascertain the wings were indeed fully stalled. Seeing the scene again, it seems as if they attempted to neutralize the bank angle as quickly as possible, i.e. as soon as there was sufficient airflow over the ailerons, which contradicts what I have learned about stall recovery. Anybody more experienced than me care to share their thoughts?

[Cough]

I'm guessing that roll control on such a short winged aircraft probably include roll spoilers too... Thus the control remains conventional rather than reverse during stalls.

Large inputs due to lack of control effect at those airspeeds...

[hvogt]

I just found another thread with regard to the same question, apparently referring to the same documentary. Although the question regarding the full aileron inputs wasn't answered, user BrasiliaCaptain mentioned a fair point:

Originally Posted by BrasiliaCaptain

I have a friend who has produced some reality TV shows. They can (and do) cut, paste, and parse footage to make things look more dramatic and drawn out than they really are. So I wouldn't take this footage to be real-time documentation of what happened on that flight.

Even so, I still wonder what the pilots were doing.

[sycamore]

Overacting...?

[john_tullamarine]

I don't have any specific knowledge for the Lear so I leave it to you to look up the TCDS to find the frozen Design Standards and then look up the relevant rules.

Be aware that the rules have varied over the years and some Types use aileron to control roll for the certification stalls. That may be the source of your observations.

Yet another example of the designers and the line flyers not communicating all that effectively ...

[Pugilistic Animus]

The flight controls lose effectiveness at low airspeeds requiring larger deflection...lateral control in jet stall is through the ailerons and spoilers

[the heck]

note that is a test flight, those pilots are actually going after a full wing stall. and determine the stalling characteristics of the stall. they try to maintain wings level until the full stall is developed. If they cannot make the stall in a wings level attitude then the airplane is not satisfactory. also note they are doing the maneuvers with the engine synchronizer on, this will reduce any induce yaw from the engines and cause one wing stalling before the other.

I know that because I was the copilot in such a test flight when they replaced the leading edge for damage. scary experience.