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| OSPREY TROUBLES | |
January 22, 2001 |
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After this discussion of the Osprey's crashes and the allegations of
falsified maintenance records, Commandant
James Jones gives the Marine Corps perspective on the tilt-rotor
aircraft.
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RAY SUAREZ: We get two perspectives. Philip Coyle was the Defense Department's top weapons tester as director of its Office of Operational Test and Evaluation during the Clinton administration. James Furman was an army combat helicopter pilot from 1966 to 1986, and is now a lawyer representing the family of the V-22 pilot that crashed last April. Later, I'll speak to the commandant of the Marine Corps. James Furman, let me start with you. This latest story about the Osprey, the reports that maintenance records were being faked, how does that fit in with what you already believe about this aircraft and its airworthiness?
RAY SUAREZ: Well, Philip Coyle, you oversaw the overall testing of the airworthiness of this craft. Is it a particularly hard aircraft to keep air-ready? PHILIP COYLE: It has been. During the operational tests that we've overseen, the aircraft has not achieved its required reliability or maintainability. The V-22 was intended to be cheaper to maintain and easier to maintain than the helicopters it's to replace. So far it has not been. |
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| The Osprey flies like a helicopter and a plane | ||||||||||||||||||||
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RAY SUAREZ: Why is that? Is it because of the particular engineering demands of making an aircraft that both flies like a helicopter and a plane? PHILIP COYLE: Well, it is a complex aircraft and has lots of mechanical and hydraulic and electronic parts. That's part of it. RAY SUAREZ: So, your report on the Osprey concluded what about this plane and its future?
RAY SUAREZ: So, Mr. Furman, what do you need to know about this aircraft that you haven't been able to find out yet?
RAY SUAREZ: What are some of those limitations, Philip Coyle, on the approach and the landing and the landing speed for the Osprey as it's currently designed. PHILIP COYLE: Well, we know from the crash last April that if the rate of descent is too fast that the aircraft can enter into what's called vortex ring state. This is an aerodynamic phenomenon where the rotors can lose lift even with the increase of power. |
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| Testing the Osprey | ||||||||||||||||||||
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RAY SUAREZ: So they will be spinning but they won't hold you up in the air? PHILIP COYLE: Yes. So that's something that we didn't really understand before the April crash. Helicopters all can have this... can all experience this phenomenon, but it appears to be worse with the V-22. RAY SUAREZ: Have you been able to figure out why? PHILIP COYLE: The Navy has been doing a series of tests where they have, at high altitude, doing it at high altitude so they're way above the ground. The Navy has been doing a series of tests to try to determine the boundary, the flight envelope of where this vortex ring state condition can occur.
MAJOR JAMES FURMAN: Well, I think the aircraft is a great concept. You may recall back in the early '50s, they were talking about flying jeeps. There can be great concepts but they may not translate into practical usefulness. This aircraft is a combination aircraft. It is the first tilt rotor aircraft that's been put into production. It is supposed to go fast for a long range and carry a big payload. The problem is you can never have an aircraft that will... be an end-all and be-all for everything. And I believe that the Marine Corps needs to look at this very objectively and perhaps even outside the Marine Corps to ensure that there is an objective analysis and make a decision about whether the increased margin of usefulness of this aircraft, which I believe is very narrow, is justified by the very large cost and expenditures of taxpayer dollars and the lives of Marines that are not test pilots but are unit pilots out there flying the aircraft and the crew chiefs and the infantry men that have to get in the back and fly. RAY SUAREZ: James Furman, Philip Coyle. Thank you both very much. |
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