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Bell's V-280 Valor is Rockin and Rollin

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posted on May, 2 2018 @ 12:55 PM
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The tail propulsor is clutchable, not just variable pitch or "feathered". A tilt-rotor has higher comparable losses due to downwash on the wing/fuselage along with much higher disc loading, with all associated problems. The three engines on a King Stallion aren't providing variable power to another shaft, just set rate to the tail-rotor and variable to one main -rotorhead. Same with the relatively simple cross-shafting on a V-22 which doesn't provide different power or RPM to port and starboard engine when engaged, and also isn't being stressed throughout the flight. I don't really know where to begin.

They will probably have scalability problems with the transmission raising height or eating cabin space and material science/quality -control on the rigid rotor, but they seem to think it is manageable.




posted on May, 2 2018 @ 01:20 PM
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a reply to: RadioRobert

I can see the variable power thing being an issue, though I'd argue the duty cycle on the V-22's cross shaft is probably harder (with the caveat being that at least in any scenario where it actually performs as-designed, they'll consider themselves lucky if they even have a salvageable aircraft to rebuild the transmissions on when all is said and done).

The clutch just seems to me like another complication/possible failure point when a prop that feathers completely would accomplish the same thing, unless they're really *that* desperate to save a percentage point or two of powertrain efficiency. Like I said though, it seems like Sikorsky designed a hot rod that will struggle to carry passengers/cargo, while Bell built a flying truck that will struggle mightily as a more nimble/survivable attack platform.



posted on May, 2 2018 @ 02:21 PM
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At least we've moved from, "it's easy and a knock off. I don't like it" to "it sounds more complicated, difficult, and novel. I don't like it".



posted on May, 2 2018 @ 03:15 PM
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a reply to: RadioRobert

I'm mostly angry with Sikorsky for shattering the Westland Lynx's speed records with a goddamned compound helicopter and then having the nerve to go bragging about it.

Oh, and fwiw I think the idea of building a tough, survivable attack helicopter out of a tiltrotor is an alternatingly silly and terrifying fantasy that probably needs to stay on the screen during Avatar movies where it actually belongs.
edit on 2-5-2018 by Barnalby because: (no reason given)



posted on May, 16 2018 @ 02:08 PM
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posted on Jun, 15 2018 @ 01:34 PM
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Next week, a team from Textron Inc. and Bell Helicopter will demonstrate the maneuverability of its experimental V-280 Valor helicopter, a platform that may one day replace the U.S. military's UH-60 Black Hawk fleet.

The June 18 demonstration comes six months after the V-280's first test flight as a technology demonstrator in the Army's Future Vertical Lift program.

"It's not just a flight test, it's actually a demonstration of what we have been able to achieve so far," retired Army Maj. Gen. Jeff Schloesser, executive vice president for strategic pursuits at Bell, told Military.com.

"What you will see is the aircraft go through a variety of maneuvers. ... One of the things we want to demonstrate is just how able you are to quickly reposition the aircraft in flight," he said. "When you are on the objective area, you are not flying fast, but what you do have to do is do tail maneuvers, turn maneuvers, roll and pitch maneuvers in a very accelerated way."




www.military.com...




 
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