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Old September 25th 06, 06:23 PM posted to rec.aviation.military.naval
nmg175
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Posts: 11
Default Check this Approach & Landing out!

With the computer landing the aircraft, the only thing keeping this thing
from making a hole in the ground is EPF (Extreme Pucker Factor) on the part
of the pilot who's just along for the ride --- and can't seeanything!. This
may be the future of carrier aircraft landings ... you don't have to fly the
"ball" because you can't SEE the ball!!! You can't even see the ship....
Automatic ejection rounds out the package...



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On April 29 at NAS Patuxent River , Maryland , the unique "Vector", X-31
made the world's first fully automated, 24-degree angle of attack (AoA)
thrust-vectored landing. The high AoA landing marked the final flight in the
Vector's three-year ESTOL (extremely short takeoff and landing) program. The
project was designed to demonstrate the viability of ESTOL thrust vectoring
and was carried out with a collaboration of the U.S. Navy, Germany 's
Federal Office of Defense Technology and Procurement, the European
Aeronautic Defense and Space Company (EADS) and Boeing Aerospace.

The 24-degree ESTOL landing also ended the X-31's career. It was first flown
in October 1990 as part of NASA's Enhanced Fighter Maneuverability Program
(EFM) that demonstrated the advantages of "post-stall" maneuvering using
vectored thrust. EFM was continued until 1995, when the X-31 was put into
storage. In 1999, the U.S. and German governments signed a "memorandum of
understanding" to relaunch the Vector under the ESTOL program.

Though the program's main mission was to prove the feasibility of high AoA,
thrust-vectored landings, the effort yielded other benefits: EADS was able
to test and validate its Flush Air Data System (FADS). Consisting of
12 tiny sensors arranged around the X-31's nose cone, FADS replaces
traditional pitot static-air measurement systems, which can be rendered
ineffective at high AoAs.

The X-31 usually lands at 12 degrees at 175 knots. The automated ESTOL
landing with 24 degrees AoA reduced its landing speed by 31 percent to
121 knots and shortened the rollout from 8,000 to 1,700 feet. Marine Corps
Maj. Cody Allee (one of the program's two test pilots) flew the final ESTOL
landing and described the approach as "almost sedate" in comparison to a
conventional X-31 landing.

The lower approach speeds made possible by ESTOL technology could increase
airframe life, lower wind-over-deck requirements for carrier landings and
result in greater bring-back capabilities for ordnance and fuel. Unmanned
aerial vehicles and the latest generation of manned tactical aircraft could
also benefit from the program's technology, including its GPS-based
Integrity Beacon Landing System and sophisticated flight-control software.

The X-31, perhaps the last of the true "X" airplanes, is now retired and
will likely go to one of Europe's or the U.S. 's many aviation museums.

Click "Play" and hang on..... note the "reverse flare" just prior to
touchdown...