V-22 Flaps up or down?

[Cobrahistorian]

Hey all,

Asking this somewhat seriously, somewhat tongue in cheek, but what's the consensus, Osprey flaps up or down?

Jon

[Grey Ghost 531]

Do they even have flaps? They have to rotate the engines at least a good part of the way to helo mode in order to land, you'd think there'd be no need for flaps.

[Cobrahistorian]

Sure they do!

Question is, what position do they stay in on shutdown. For us, we zero out our stabilator so that it is parallel with the ground. Do they raise their flaps, do they bleed down over time, or are they left in the down position on shutdown?

Edited July 10, 2008 by Cobrahistorian

[Trigger]

Jon

The MV-22B on static display at P-Cola 11/06, I recall the flaps as being in the down position; I think they're left in the down position on shutdown.

V-22 Flaps up or down?, Also known as "do Ospreys have false canopies"

An Osprey cannot perform a Cobra, even if Alan Bussie is at the controls, if there is a Moai in the back.

Edited July 10, 2008 by Trigger

[Cobrahistorian]

An Osprey cannot perform a Cobra, even if Alan Bussie is at the controls, if there is a Moai in the back.

Yes, but Chuck Norris can.

[LemonJello]

I'm no expert, and I didn't stay in a Holiday Inn Express last night, but all the ones I've seen at New River sitting on the flightline and the few here at Quantico the flaps are up on them. Maybe I've just never seen them when they've had a chance to bleed off and droop?

Is there some way to lock them in place, so the nacelles/wing can fold up for storage aboard ship? They couldn't be allowed to drop in the stowed position, could they?

Edited July 10, 2008 by LemonJello

[phantom]

OK thats the flap question answered. Now, what about the false canopy?

[Joe Hegedus]

Sure they do!

Question is, what position do they stay in on shutdown. For us, we zero out our stabilator so that it is parallel with the ground. Do they raise their flaps, do they bleed down over time, or are they left in the down position on shutdown?

If the nacelles are vertical on a V-22, the flaps are down. They are raised, on the ground, when the wingstow function is selected as the wing will not stow with the flaps down (I seem to recall an incident several years ago when there was a problem with the timing and a flap was driven into the fuselage during the stow operation-I think it happened at the Arlington flight test facility but my memory is a bit hazy about that.)

[LemonJello]

If the nacelles are vertical on a V-22, the flaps are down. They are raised, on the ground, when the wingstow function is selected as the wing will not stow with the flaps down (I seem to recall an incident several years ago when there was a problem with the timing and a flap was driven into the fuselage during the stow operation-I think it happened at the Arlington flight test facility but my memory is a bit hazy about that.)

Makes sense to me.

[Joe Hegedus]

Makes sense to me.

The main reason the flaps are down with the nacelles vertical is to reduce the wing area that the rotor downwash impinges on to reduce the downforce on the wing which is working against the proprotors trying to lift the pig off the ground. So, bleeding hydraulics have naught to do with it; they are down by design.

[LemonJello]

The main reason the flaps are down with the nacelles vertical is to reduce the wing area that the rotor downwash impinges on to reduce the downforce on the wing which is working against the proprotors trying to lift the pig off the ground. So, bleeding hydraulics have naught to do with it; they are down by design.

That's what I thought would be the explanation after reading your previous post, Joe, but I do appreciate the amplification, it makes me feel like I actually have some idea of how the darn things work. Truth be told, I like to build the -22 because so many people rail and gnash their teeth over it, plus I think it's just a cool idea in many ways.

Well, it looks to be beer-thirty on the wall clock, so I'm headed out!