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Old 9th Jan 2006, 10:48
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last third
 
Join Date: Jul 2005
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Re: Blackhawk Question

Nick is pretty much spot on here.

We have practiced this EP many times in the Ozzy Black Hawk sim with good results. The S-70 is capable of dumping fuel and ESSS and external load jettisons hence if you can reduce AUW this will also require less power required to maintain level and hence less TQ. At low AUW it is possible in certain circumstances to stretch the glide and manouevre to a position where a flared attitude running landing with PCL chop can be effected. Good Crew coordination and CRM are essential for the termination. If the termination area cannot suppport a flared attitude running landing then a standard auto neds to be flown due obstacles and terrain.

As for magic airspeeds and formulas there are none. Concepts are the key. Airspeed ~ 100 + kts to keep the 1/2 row v2 over the vertical fin and just enough TQ to stretch the glide while reducing AUW, Left and forward cyclic for side slip and descent (shallow descent).

If you have enough training, experience and a suitable termination area then you may be able to send all concerned an e-mail to let us know the secret.

At the point of t/r loss of thrust or drive shaft failure there will also be a vibe felt in the machine, a yaw to the right and a potential pitch up as components of the t/r are lost/fail and C of G changes.

The great thing about the Black Hawk family is the ability of the under carriage to absorb high Rates of descent (typically 2500 ft/min) and keep the fusalage and crew in one piece.



Best of luck.

Np formulas or numbers apply known concepts!

Lasty.
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