Spinning an Airliner
#52
How about a Hawker 800XP snap roll multiple times on a ferry flight at the hands of contract pilots:
Hawker 800XP....snap rolled 3-4 times - PPRuNe Forums
Hawker 800XP....snap rolled 3-4 times - PPRuNe Forums
#53
#54
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#55
It takes some practice but it's very simple.
Click on the link above and watch Bob Hoover do a very nice smooth 1 g roll. Bob proves that being smooth is obtainable even for a fighter pilot. I know it sounds strange that a fighter guy could be smooth but it's possible.
#56
I don't see how a small number of rolls could make such dimples as we see here. It would have to be an amazingly hard acceleration one way then the other in the longitude to torque it so. There are no forces opposing the roll axis within the fuselage itself besides than the mass of the fuselage. It would seem to indicate some fantastic jerks one way and the other and I can't imagine such forces unless they were flying well above maneuvering speed.
#57
I don't see how a small number of rolls could make such dimples as we see here. It would have to be an amazingly hard acceleration one way then the other in the longitude to torque it so. There are no forces opposing the roll axis within the fuselage itself besides than the mass of the fuselage. It would seem to indicate some fantastic jerks one way and the other and I can't imagine such forces unless they were flying well above maneuvering speed.
#58
Are we there yet??!!
Joined APC: Apr 2006
Posts: 2,010
I don't see how a small number of rolls could make such dimples as we see here. It would have to be an amazingly hard acceleration one way then the other in the longitude to torque it so. There are no forces opposing the roll axis within the fuselage itself besides than the mass of the fuselage. It would seem to indicate some fantastic jerks one way and the other and I can't imagine such forces unless they were flying well above maneuvering speed.
2. A snap roll involves no aileron and its a quite violent maneuver initiated by stalling the elevator and stomping the rudder. So yeah, there are quite a bit of torsion forces involved espically when aileron is used to stop the maneuver. A-la fuselage twist.
#59
I don't see how a small number of rolls could make such dimples as we see here. It would have to be an amazingly hard acceleration one way then the other in the longitude to torque it so. There are no forces opposing the roll axis within the fuselage itself besides than the mass of the fuselage. It would seem to indicate some fantastic jerks one way and the other and I can't imagine such forces unless they were flying well above maneuvering speed.
#60
The word jerk is actually a physics term; velocity differentiated with respect to time gives acceleration while acceleration differentiated w.r.t time gives jerk. I suppose if we rapidly accelerate those bad pilots we have to get rid of them for bending tin we also achieve high rates of jerk in those pilots by doing so- and you could say they were jerks on multiple levels.
Wiki-"jerk"
Wiki-"jerk"
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