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Apr 19, 2010



The walls of a wadi, a dry river or stream bed, can be very steep and could cause exactly the sort of effect I describe here: http://pogoblog.typepad.com/pogo/2010/04/air-force-investigating-class-a-osprey-mishap-from-march.html#comment-6a00d8341c68bf53ef01347fe68381970c

This effect is not acknowledged by the DoD or any of the amature websites on V-22 problems. They do not even generally acknowledge the fact that V-22's are not allowed to land with the tail toward a wall or any other surface discontinuity that would divert the aft flowing stream of air exiting the rotor wash area up, creating a vertical version of a vortex ring state that is instantly catastrophic. Once that aft wash of air is free of the coriolis effect holding it to the ground, it can very quickly be sucked into the low pressure area above either rotor causing a complete loss of lift on that side.

They might blame that V-22 crash on the pilot, but this is not the pilot's fault. The fact of the matter is, this is the fault of the 85% of the US armed forces that polish seats with thier asses, not that of the 15% that actually fight wars. In military terminology, however, to the winner go the spoils, and obviously the 85% have a lot more political clout than the 15%. Thus it is we are asked to believe that the bureaucratic 85% are our gift from God even though they can't get a single program on-budget or on-schedule, and the 15% who actually fight our wars are bumbling idiots somewhat akin to the keystone cops who cannot follow the elaborate procedures required to keep their crappy weapons from failing them.

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