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Old 19th January 2008 | 17:10
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Graviman
 
Joined: Nov 2004
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From: Cambridgeshire, UK
X-49 "Speedhawk"
The helicopter is the subject of a US$26.1 million U.S. Navy-sponsored project that consists of a Sikorsky YSH-60F helicopter modified by Piasecki as a testbed to test the "Vectored Thrust Ducted Propeller" (VTDP) system. One YSH-60F will be converted to test the feasibility of VTDP under an advanced technology demonstration program.

The X-49A flight demonstrator is being developed with funding from the US Army's Aviation Applied Technology Division to demonstrate the ability to increase the speed of existing helicopters to 200 kt (360 km/h) or more. The flight demonstrator has been updated with a lifting wing taken from an Aerostar FJ-100 business jet. A ring tail has been added and the helicopter drive train modified to accommodate VTDP. Piasecki conducted integrated tests of the modified drive train at the Navy's helicopter transmission test facility.
http://blog.flightstory.net/126/siko...light-in-june/
http://en.wikipedia.org/wiki/Piasecki_X-49


Video here:
http://uk.youtube.com/watch?v=Yu2CwHwxJYA
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