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Old 05-02-2010 | 01:27 PM
  #34  
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Spongebob
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From: Grumman Torture Device (weekends only)
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It's physically impossible for the NP2000 to pitchlock. It has no mechanism to do so. With a loss of hydraulic pressure the blades are free to rotate about their longitudinal axis and by design the airflow will drive the blades to feather (similar to a T-34C, except it has springs to help). What appears to be going on is there is an area in the envelope where this won't necessarily happen and the "will" becomes a "should". A windmilling NP2000 has significantly more drag than the 4-bladed one did (which was dumped because the overhaul capacity disappeared).

BTW, the Choctaw bird was one of the evil, evil, Group 1 TE-2C's. Once we found out everyone was safe, the community cheered that that thing burned up. Should have been scrapped at least 10 years prior.

Spongebob
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