MV-22 Osprey

[Matt308]

Wonder if there are any hydraulic lockouts to prevent improper blade position during weight-on-wheels rotorerotor/turbine rotation.

Mkloby?

[mkloby]

Originally Posted by Matt308

Wonder if there are any hydraulic lockouts to prevent improper blade position during weight-on-wheels rotorerotor/turbine rotation.

Mkloby?

You mean to prevent the nacelles from going to the full fwd position in landing configuration? I would think that there must be, either activated by a WoW switch like you said, or a downlock/uplock switch. Like I said, I don't have the NATOPS for the MV-22 yet, I won't get one until I get back to Pensacola, which will be about April/May and finish up the helicopter syllabus. Then I'll be able to give you specific answers.

Guys - the wife has started labor, so we'll be going to the hospital soon. See ya in a few days!

[Matt308]

Good for you Matt.

I know there has to be an interlock to prevent the forward flight translation of the nacelles/rotors while WoW. What I'm wondering is if there is another system constraint that has logic that states:

IF WoW=Yes & Engine N1=0 & Ground Speed=0 and Rotor is in position X (where a blade is at 0 degrees);
THEN Move Engine/Nacelle/Rotor parallel with "flight axis".

or:

IF WoW=Yes & Engine N1=0 and Ground Speed=0 and Rotor is NOT in position X (where blade is at any other degree deemed to cause ground contact);
THEN DO NOT MOVE Engine/Rotor translation parallel to "flight axis".

Or do they have to just shut down the aircraft and then physically rotate the rotors to ensure that nacelle translation will not result in rotor contact with the ground?

[DerAdlerIstGelandet]

I dont think they will shut down, but rather not allow you to move them.

It is off topic but this is why I dont think it will let you move them rather than shut them off. The Blackhawks WOW switch disconnects electrical switches so that you can not jettison your external stores such as the ESSS while on the ground. That is just one function of the WOW switch on it.

[the lancaster kicks ass]

gentlemen please, it's black magic, and that alone will suffice.........

[Matt308]

British engineering at it's finest.

[DerAdlerIstGelandet]

Then it would not work...

[Matt308]

Oh c'mon Adler. The Comet, the Brabazon, TSR...

[the lancaster kicks ass]

Isambard Kingdom Brunell

[Matt308]

Gesundheit.

[DerAdlerIstGelandet]

I would have shot my parents if they had named me that.

[twoeagles]

Quoted from "Inside the Navy":
V-22 DESERT TESTING FINDS PROBLEMS THAT HURT MISSION EFFECTIVENESS: The V-22 Osprey, which may deploy to Iraq with Marines this year, suffered problems that hurt its mission effectiveness when the Air Force tested it for a month in the New Mexico desert, according to a new report from the Pentagon's top weapons tester. The problems are described in the latest annual report from the Defense Department's operational testing directorate, led by Charles McQueary. The V-22 is a helicopter-plane hybrid developed by Bell Helicopter Textron and Boeing. During an "operational utility evaluation" conducted last summer in the desert at Kirtland Air Force Base, NM, the effectiveness of the Osprey for training missions and potential combat missions was "degraded by poor aircraft availability," says the report, issued January 18. "Frequent part and system failures, limited supply support, and high false alarm rates in the built-in diagnostic systems caused frequent flight delays and an excessive maintenance workload," the report says. Some of the reliability problems "may be attributable to the extended exposure to the desert operating environment" where the assessment occurred, says the report. The Osprey provided only "marginal operational availability" during the 41 flights (74 flight hours), the report says. The report urges the V-22 program to correct the deficiencies noted in the "operational utility evaluation" before the CV-22 begins its initial operational testing and evaluation in FY08. The report also calls on the program to monitor the operational suitability of the Marine Corps' Block B version of the Osprey, which is due to deploy this year, to determine the "discrepancy" between the solid performance reported in the operational evaluation of the Marine Corps version and the problems now coming to light. James Darcy, the Navy's spokesman for the V-22 program, said program officials do not believe these issues will delay fielding plans for the Marine Corps or Air Force versions of the Osprey. (Christopher J. Castelli, Inside The Navy – 1/22)

[DerAdlerIstGelandet]

As I suspected (and the reason I am not a fan of her) she is a maintaners nightmare.

[twoeagles]

It makes you wonder just what the Marines were doing different in their
OPEVAL than the Air Force...Is the USAF CV-22 very different than the
USMC V-22 that would cause so many negatives in their desert testing?

[DerAdlerIstGelandet]

I dont think that there can be much of a difference. An Osprey is an Osprey.