airbrake question

"miso" wrote...
Does the airbrake put it's force on the center of gravity of the
plane? If not, how does the pilot compensate for the force?

In some airplanes there is a cable interconnect between the airbrake and the
elevators that will compensate for pitching moments caused by the airbrakes.
Otherwise the pilot simply uses the stick/yoke to compensate for small changes.
After a pilot has flown a particular airplane type for a while, he naturally
adjusts when he uses the airbrakes.

Thanks to both replies. I was thinking of the F15, so I thought it
might be the center of gravity. I'm going to see if I can find photos
of the other models mentioned.

"John R Weiss" wrote in message news:La2zb.392545$HS4.3201917@attbi_s01...
"miso" wrote...
Does the airbrake put it's force on the center of gravity of the
plane? If not, how does the pilot compensate for the force?

In some airplanes there is a cable interconnect between the airbrake and the
elevators that will compensate for pitching moments caused by the airbrakes.
Otherwise the pilot simply uses the stick/yoke to compensate for small changes.
After a pilot has flown a particular airplane type for a while, he naturally
adjusts when he uses the airbrakes.

"miso" wrote in message
om...
Thanks to both replies. I was thinking of the F15, so I thought it
might be the center of gravity. I'm going to see if I can find photos
of the other models mentioned.

Yes, a fighter speed brake is completely different from most of the replies
you got. A fighter has the speed brake on the fue forward of the tail and
it is only similar in name to a "spoiler deployed as a speedbrake".

On Wed, 3 Dec 2003 08:39:19 -0800, "Tarver Engineering"
wrote:


"miso" wrote in message
. com...
Thanks to both replies. I was thinking of the F15, so I thought it
might be the center of gravity. I'm going to see if I can find photos
of the other models mentioned.

Yes, a fighter speed brake is completely different from most of the replies
you got. A fighter has the speed brake on the fue forward of the tail and
it is only similar in name to a "spoiler deployed as a speedbrake".

John, once again you illustrate the problem with usenet. "on the fue"?
"spoiler deployed as a speedbrake"?

Seriously, the 102 and 106 certainly didn't have it deployed "forward
of the tail" and those are the airplanes you were involved with in the
FAT ANG. The 105 didn't have it "forward of the tail" and the F-16
among current equippage doesn't have it "forward of the tail" either.

Some do. The F-15 certainly is forward and the F-111 was certainly
forward.

As for "spoiler deployed as a speedbrake"--that doesn't happen on any
fighter type that I've encountered. Certainly some tactical aircraft
used spoilers, primarily as a design counter to adverse yaw, but none
with spoilers have a choice of control surface or speed brake
function. Airliners do.

Tell me again about your fighter experience.

Speed brakes on fighters are single function surfaces.

"Ed Rasimus" wrote in message
...
On Wed, 3 Dec 2003 08:39:19 -0800, "Tarver Engineering"
wrote:


"miso" wrote in message
. com...
Thanks to both replies. I was thinking of the F15, so I thought it
might be the center of gravity. I'm going to see if I can find photos
of the other models mentioned.

Yes, a fighter speed brake is completely different from most of the
replies
you got. A fighter has the speed brake on the fue forward of the tail
and
it is only similar in name to a "spoiler deployed as a speedbrake".

John, once again you illustrate the problem with usenet. "on the fue"?
"spoiler deployed as a speedbrake"?

Seriously, the 102 and 106 certainly didn't have it deployed "forward
of the tail" and those are the airplanes you were involved with in the
FAT ANG. The 105 didn't have it "forward of the tail" and the F-16
among current equippage doesn't have it "forward of the tail" either.

Some do. The F-15 certainly is forward and the F-111 was certainly
forward.

As does the F-18.

As for "spoiler deployed as a speedbrake"--that doesn't happen on any
fighter type that I've encountered.

That does cause one to wonder why there was such a lengthly discussion of
airliner type speedbrakes.

Certainly some tactical aircraft
used spoilers, primarily as a design counter to adverse yaw, but none
with spoilers have a choice of control surface or speed brake
function. Airliners do.

The selection capability is however there for those tactical aircraft using
an actual "speed brake", as opposed to a "spoiler deployed as a speedbrake".

Tell me again about your fighter experience.

Speed brakes on fighters are single function surfaces.

Exactly as I wrote, but thanks for playing.

From: Ed Rasimus

On Wed, 3 Dec 2003 08:39:19 -0800, "Tarver Engineering"
wrote:


"miso" wrote in message
.com...
Thanks to both replies. I was thinking of the F15, so I thought it
might be the center of gravity. I'm going to see if I can find photos
of the other models mentioned.

Yes, a fighter speed brake is completely different from most of the replies
you got. A fighter has the speed brake on the fue forward of the tail and
it is only similar in name to a "spoiler deployed as a speedbrake".

John, once again you illustrate the problem with usenet. "on the fue"?
"spoiler deployed as a speedbrake"?

Seriously, the 102 and 106 certainly didn't have it deployed "forward
of the tail" and those are the airplanes you were involved with in the
FAT ANG. The 105 didn't have it "forward of the tail" and the F-16
among current equippage doesn't have it "forward of the tail" either.

Some do. The F-15 certainly is forward and the F-111 was certainly
forward.

As for "spoiler deployed as a speedbrake"--that doesn't happen on any
fighter type that I've encountered. Certainly some tactical aircraft
used spoilers, primarily as a design counter to adverse yaw, but none
with spoilers have a choice of control surface or speed brake
function. Airliners do.

Tell me again about your fighter experience.

Speed brakes on fighters are single function surfaces.

The term "fue" was to prove he's in the right clique I guess.

As for his fighter experience he was a engine mechanic on F-106s which, with
his EE degree, makes him an expert on everything aerospace, automotive etc as
he is fond of saying in several newsgroups.

Dan, U.S. Air Force, retired