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State Police Helo Crash Charlottesville Virginia

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State Police Helo Crash Charlottesville Virginia

Old 14th May 2020, 14:49
  #41 (permalink)  
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Join Date: Jun 2001
Location: Rockytop, Tennessee, USA
Posts: 5,660
The NTSB has opened the accident docket with interviews, photos, diagrams and other findings:

https://t.co/Khz5R5pmIB?amp=1

NTSB Factual Report (previously linked above):

https://t.co/cBeA0IyOPv?amp=1
Airbubba is online now  
Old 15th May 2020, 05:27
  #42 (permalink)  
 
Join Date: Apr 2000
Location: EGDC
Posts: 7,767
When recovering from a vortex ring state condition, the pilot tends first to try to stop the descent by increasing collective pitch. The traditional recovery is accomplished by increasing airspeed, and/or partially lowering collective to exit the vortex. In most helicopters, lateral cyclic thrust combined with an increase in power and lateral antitorque thrust will produce the quickest exit from the hazard. Vortex Ring State Training According to the FAA's Helicopter Instructor's Handbook (FAA-H-8083-4), vortex ring state (also known as settling with power) can safely be introduced and practiced at altitudes allowing distance to recover. The handbook also states the following: Ensure the student understands that settling with power can occur as a result of attempting to descend at an excessively low airspeed in a downwind condition, or by attempting to hover OGE at a weight and density altitude greater than the helicopter's performance allows…. Recovery is accomplished by…if altitude allows, reducing collective and lowering the nose to increase forward speed. This moves a helicopter out of its downwash and into translational lift. When the helicopter is clear of the disturbed air, or downwash, confirm a forward speed indication and initiate a climb to regain the lost altitude.
Interesting that there is still reference to vortex ring being the same as settling with power and a mix of recovery techniques, one of which is the Vuichard one in all but name. No wonder pilots get confused when this comes from the authority.
crab@SAAvn.co.uk is offline  

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