2007-02-07 03:14:07 · 10 answers · asked by siddharth b 1 in Cars & Transportation ➔ Aircraft
Your question is very confusing. rephrase please. :)
2007-02-07 04:12:41 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Jack stall is associated with the hydraulic servos/jacks that operate the main rotor blades. In certain helicopter(AS350/355, Gazelle are ones that I know of), during hard maneuvering, the aerodynamic loads on the blades can become high enough to prevent the hydraulics from being able to move the blades further.
In the Gazelle, there is an uncommanded pitch up and roll to the right. Simply reducing the severity of the maneuver will reduce the load and free the controls.
2007-02-10 16:24:08 · answer #2 · answered by eferrell01 7 · 0⤊ 0⤋
part of stability and controllability - lateral
All control surfaces (except perhaps spoilers) tend to lose effectiveness at high Mach numbers and this is true whether the surface is manually operated or power operated. if very high hinge moments are experienced additionally, then the manual control becomes very heavy to operate and the powered control, depending on it's system design, may suffer JACK STALLING. this will be felt either as a sudden solid stop or as an ability to apply further control, without much of an increase in force, accompanied by no further response from the control. and you may also find something of the sort at http://www.rotor.com/Default.aspx?tabid=510&newsid905=49495&
hope i could help!!
2007-02-10 19:40:21 · answer #3 · answered by poojab 1 · 0⤊ 0⤋
That's a new one on me. Jack stall? I trained with the Air Force in 1961 and now have some 18,000 hours and never heard of it. Maybe you could enlighten me? If there is such a thing, I'd like to know about it. You're never too old to learn.
2007-02-07 08:18:10 · answer #4 · answered by Anonymous · 1⤊ 0⤋
need a stall to store the jack
2007-02-07 04:28:11 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Are you referring to the jack screw that repositions the stabilizer? In that case the jack screw became overloaded due to high aerodynamic pressures because of a mistrim situation. This was one of several factors that contributed to jet upset at high altitudes. Other than that I have no idea what you're talking about.
2007-02-07 12:39:32 · answer #6 · answered by Sul 3 · 1⤊ 0⤋
The stall is to keep hijackers in when there caught
2007-02-07 04:29:51 · answer #7 · answered by Golly Geewiz 4 · 0⤊ 0⤋
When an airfoil exceeds the critical angle of attack , it will stall
2007-02-07 07:18:12 · answer #8 · answered by cherokeeflyer 6 · 1⤊ 0⤋
Fortunately, all I have to deal with is "retreating blade stall".
2007-02-07 06:36:13 · answer #9 · answered by lowflyer1 5 · 1⤊ 0⤋
Never heard of it.
2007-02-07 05:57:25 · answer #10 · answered by RANDLE W 4 · 1⤊ 0⤋