Dual engine failure in CV-22

[ron-powell]

Here's a couple of links.

http://www.commondreams.org/news2005/1025-04.htm

http://www.washingtonpost.com/wp-dyn...102501511.html

[and Tompkins]

Interesting to note:

"Darcy said the CV-22 -- a prototype that was not equipped with the de-icing equipment that will be standard on operational aircraft -- began flying on instruments after hitting severe thunderstorms and icing conditions."

DUH! However, with moisture evident in the air and at low temps, they shouldn't have been flying there anyway!

I'm sure our good friend Mr. Lappos is willing to give his $0.02 on why Sikorsky products ... errrr helicopters in general ... are superior!

[BossEyed]

In the interests of fairness, given the thread title, the second link includes:

...but the U.S. Navy denies the engines stalled or that the crew was in danger.

[ron-powell]

Bosseyed:

Yeah, I should have thought through the thread title. Maybe a question mark at the end?

Anyway, your "fairness" point is why I included both links.

Ron Powell

[CRAZYBROADSWORD]

Come on guys give them a chance, can you imagine what was said when the first helicopter took to the sky's. When tilt rotor aircraft start coming good it will be a great day for us as we can finaly say that the only advantage of fixed wing aircraft I.E. the speed thing is no longer an issue.

[Above Datums]

I sat through a brief on tilt rotors and was informed by some engineering type boffin that, tilt rotor craft were the way forward due to the faster airspeeds they can achieve and that the approach angle to a HLS can be steeper. It kind of spoiled it when he went on to explain that vortex ring happens at a higher airspeed with lesser rates of descent making steeper approaches more dangerous. Tilt rotors: definately something there but when Westlands are producing a rotor with a tip speed of Mach 1+, allowing helos to travel at 200kts+ do we really need them?

"Lifting!"

AD

[21st Century]

Above Datums:

He should have said that, 'vortex ring state happens at GREATER rates of descent in Tiltrotors' compared to helicopters.
(ask Nick)
Projected top speed for the BA609 is 293kts.

[ShyTorque]

Forget the icing problem, that can be designed / de-iced out.

This is the thing to be more concerned about from the first report:

"In the event of a single engine failure, V-22 flight procedures require the pilot to transition to aircraft mode".

And if this isn't possible, such as on take-off from a restricted area?

Any info published yet on the Performance A / Class 1 requirements?

This aircraft CAN'T replace helicopters because it is specialised / optimised for the higher speed envelope, not the low speed environment where true helicopters will remain superior. It is like asking a greyhound to pull a heavy dog sleigh - it doesn't have the low speed grunt to replace the husky.

[Above Datums]

21st

umm come to think of it he did, my bad!