[MilCom] Raptor--Low speed stability

[Joe Cobb]

When i saw the Raptor under normal conditions last
week at Tyndall just taking off conventionally the
plane turned away from me and he was making one heck
of a racket without his afterburners.  He sounded what
other a/c sounded like with the burners on.  Maybe he
had them on prior to the turn and then cut them off
but climbing out over the gulf he was rocking.  Those
Pratts are very powerful.  I'm impressed and i didn't
see any airshow version.  I just hope the demo guys in
2008 come within a reasonable drive of me.

Joe
Nashville, Tn.
--- baycomm at earthlink.net wrote:

> 
> 
> > Subject: The New F/A-22
> > 
> >  Fast (super-cruise*) and stealthy, and integrated
> avionics are cool, 
> > but what’s really impressive is the F/A-22s low
> speed stability and 
> > maneuverability.  In the late 40s and to early 60s
> aeronautical 
> > engineers were going nuts on how to shape intakes
> to handle both 
> > subsonic and super-sonic air flows, without
> stagnation or compressor 
> > stalls.  Supersonic in itself was a big challenge
> because you had to use 
> > shock waves to slow the intake air mass to
> sub-sonic before it hit the 
> > compressor blades, or they would stall.  The
> engineers figured it out, 
> > but the solution was keeping a lot of air going in
> the front end to make 
> > sure the all hot air kept going out the back end. 
> As you watch this 
> > Mach 2 airplane suspend motionless in air and do
> tail slides, be aware 
> > of the truly amazing performance of the engines
> and intakes. 
> > 
> > Some used to think the Su-27 / Su-31 “Cobra”
> maneuver was the epitome of 
> > 3rd to 4th generation fighter maneuverability. 
> That snap maneuver 
> > doesn’t hold a candle to what this
> two-dimensional vectored-thrust 
> > fighter with fat independent horizontal stabs can
> do at low speed.  
> > There must be far more tricks up its sleeve in the
> high subsonic 
> > dogfight speed range. 
> > 
> > The video is about 5 minutes long but the last
> 30-40 seconds are priceless.
> > 
> >
>
http://www.f22-raptor.com/media/video_gallery/videos/F22_AirShow_Langley.wmv
> 
> > 
> > 
> > ACC recently approved the Raptors new DEMO
> profile.  This was the first 
> > show.  Five minute video.
> > 
> > Watch the elevators of the airplane in this demo. 
> They work 
> > independently.  It also has vectored thrust.
> > 
> > ACC = Air Combat Command (for the non-Air Force
> folks)
> > 
> > *Supercruise:  The F/A-22 can sustain supersonic
> flight without the use 
> > of fuel-gulping afterburners.
> 
>
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