Cobrahistorian Posted July 10, 2008 Share Posted July 10, 2008 Hey all, Asking this somewhat seriously, somewhat tongue in cheek, but what's the consensus, Osprey flaps up or down? Jon Quote Link to post Share on other sites
Grey Ghost 531 Posted July 10, 2008 Share Posted July 10, 2008 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. Quote Link to post Share on other sites
Cobrahistorian Posted July 10, 2008 Author Share Posted July 10, 2008 (edited) 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 Quote Link to post Share on other sites
Trigger Posted July 10, 2008 Share Posted July 10, 2008 (edited) 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 Quote Link to post Share on other sites
Cobrahistorian Posted July 10, 2008 Author Share Posted July 10, 2008 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. Quote Link to post Share on other sites
LemonJello Posted July 10, 2008 Share Posted July 10, 2008 (edited) 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 Quote Link to post Share on other sites
phantom Posted July 10, 2008 Share Posted July 10, 2008 OK thats the flap question answered. Now, what about the false canopy? Quote Link to post Share on other sites
Joe Hegedus Posted July 11, 2008 Share Posted July 11, 2008 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.) Quote Link to post Share on other sites
LemonJello Posted July 11, 2008 Share Posted July 11, 2008 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. Quote Link to post Share on other sites
Joe Hegedus Posted July 11, 2008 Share Posted July 11, 2008 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. Quote Link to post Share on other sites
LemonJello Posted July 11, 2008 Share Posted July 11, 2008 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! Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.