Forum: F-22A Raptor

Negative AoA? All fighter airplanes can do that. Just fly by inverted.

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Elite Joined: Jul 22, 2005 Posts: 915 Status: Offline

johnwill wrote:

Negative AoA? All fighter airplanes can do that. Just fly by inverted.

I think he's referring to the fact that the B-52 his a bit of a nose-down attitude with the wings are at a low AoA. "Technically" it might be considered a negative AoA but it's certainly not the kind of thing anybody here was talking about.

I was referring (I thought obviously) to strykerxo's post wanting to see a negative AoA pass. Are you thinking I was referring to a B-52? Ridiculous!

As for the B-52, sure it flies around nose-down, but only with flaps down. Flaps-up, it looks like any other airplane, fuselage slightly nose-up. The flaps are huge and generate very large lift and nose-down pitch moment, forcing the airplane to fly nose down to keep from climbing.

And yes, a wing can generate positive lift at a negative angle of attack. All it takes is a highly cambered wing, like the B-52 with flaps down.

Elite Joined: Jul 22, 2005 Posts: 915 Status: Offline

johnwill wrote:

I was referring (I thought obviously) to strykerxo's post wanting to see a negative AoA pass. Are you thinking I was referring to a B-52? Ridiculous!

I know what you meant I was referring to Checksixx's post.

Good. It is fun to watch a B-52 takeoff and come off the rear mains first, then land on forward mains first.

Elite Joined: Jul 20, 2005 Posts: 1021 Status: Offline

My B-52 reference was simple and directed at wanting to see a negative AoA pass. Would anyone like to point out a fighter that can perform a negative AoA pass, at airshow altitude, with no flaps and not inverted? I'm pretty sure most would decend.

Harrier, AV-8A, AV-8B.

Elite Joined: Jul 20, 2005 Posts: 1021 Status: Offline

Johnwill...please re-read my post and try again.

Ok, I re-read your post. You want to see a fighter (Harrier, AV-8A, AV-8B) perform a negative AoA pass (nose down hover, with some forward motion) at airshow altitude (maybe 200 ft) with no flaps (flaps up) not inverted (no problem, they can't do it inverted). I'm almost certain that meets your wish. Enjoy. And if you wait a few more months, you could ask to see the F-35B do it.

Where am I going wrong, Checksixx?

Elite Joined: Jul 20, 2005 Posts: 1021 Status: Offline

Never seen a Harrier do that without flaps...ever.

Which means it can't be done, right? You only asked for someone to point out a fighter that "can" do it.

Elite Joined: Jul 20, 2005 Posts: 1021 Status: Offline

Well when the jet goes into STOVL mode of any kind the flaps are down...so I'm still trying to figure out why you referenced Harrier.

Because it can do what you asked to see. OUT

Elite Joined: Jul 20, 2005 Posts: 1021 Status: Offline

Lol...stonewall me even though you clearly know what I said. Fine.

No one will see a F-22 negative AoA pass at an airshow...question answered.

I saw this article as well as a couple of pictures, of the 22 inverted doing a AOA m/v. Maybe some confusion over inverted or negative AOA, but this is what I would like to see. About half way down the page, written by Jon Beesley

http://www.codeonemagazine.com/archives ... f22_1.html

Forum: F-22A Raptor

F-22 Airshow maneuvers