X-29A GRUMMAN
The Grumman X-29 explored a number of new technologies, the most immediately obvious being the forward swept wings and canard control surface.

Scale: 1/40
Wing Span: 8 1/2" Length: 16"

X-36 TEST A/C BOEING
The McDonnell Douglas X-36 Tailless Fighter Agility Research Aircraft was a subscale prototype jet designed to fly without the traditional tail surfaces common on most aircraft.

Scale: 1/15
Wing Span: 8 3/4" Length: 13 3/8"

X-33 VENTURE STAR LOCKHEED-MARTIN
The X-33 was a technology demonstrator for NASA's "next-generation" of space launch vehicle named Venture Star.

Scale: 1/50
Wing Span: 18 1/4" Length: 16 5/8"

X-1 BELL
The first aircraft to fly faster than the speed of sound, which was at the time, thought to be impossible, the Bell X-1 was an experimental aircraft designated for testing of new technologies and usually kept highly secret. U.S. Air Force pilot Charles “Chuck” Yeager flew the Bell X-1 on October 14, 1947.

Scale: 1/32
Wing Span: 10 1/2" Length: 12 3/4"

X-1A
The first aircraft to fly faster than the speed of sound, which was at the time, thought to be impossible, the Bell X-1 was an experimental aircraft designated for testing of new technologies and usually kept highly secret. U.S. Air Force pilot Charles "Chuck" Yeager flew the Bell X-1 on October 14, 1947.

Scale: 1/32
Wing Span: 10 1/2" Length: 13 1/4"

X-2 STARBUSTER
The Bell X-2 Starbuster was an American research aircraft built to investigate flight characteristics in the Mach 2-3 range.

Scale: 1/32
Wing Span: 13" Length: 16 1/4"

X-3 STILETTO DOUGLAS
The X-3 made its first test flight at Edwards AFB, California on October 20, 1952 and flew supersonically in June 1953.

Scale: 1/32
Wing Span: 8 1/2" Length: 25 1/4"

X-4 BANTAM NORTHROP
The No. 1 aircraft was first flown by Northrop on December 16, 1948, and the second X-4 made its initial flight on June 7, 1949.

Scale: 1/32
Wing Span: 10 1/4" Length: 9 3/4"

X-5 BELL
The X-5 was the world's first airplane to vary the sweepback of its wings in flight. It was built to prove the theory that by increasing the sweepback of an airplane's wings after takeoff.

Scale: 1/32
Wing Span: 7 3/4" Length: 12 3/4"

XF-92A CONVAIR
First flown on September 18, 1948 at Edwards AFB, California. Only one XF-92A was built; it was delivered to the Museum in 1969 from the University of the South, Sewanee, Tennessee.

Scale: 1/32
Wing Span: 12" Length: 18"

D-558-1 SKYSTREAK DOUGLAS
The Douglas Skystreak (the D-558-1) was designed in 1945 by the Douglas Aircraft Company for the U.S. Navy Bureau of Aeronautics, in conjunction with the National Advisory Committee for Aeronautics (NACA).

Scale: 1/32
Wing Span: 9 1/2" Length: 13 1/4"

X-33 VENTURE STAR LOCKHEED-MARTIN
The X-33 was a technology demonstrator for NASA's "next-generation" of space launch vehicle named Venture Star.

Scale: 1/100
Wing Span: 9 1/8" Length: 8 3/8"

X-15 NORTH AMERICAN
The North American X-15 rocket plane was perhaps the most important of the USAF/USN X-series of experimental aircraft.

Scale: 1/32
Wing Span: 8 1/4" Length: 18 3/4"

X-38 SPACE ESCAPE SHUTTLE NASA
The X-38 was a program under leadership of NASA Johnson Space Center to build a series of incremental flight demonstrators for the proposed Crew Return Vehicle (CRV) for the International Space Station.

Scale: 1/30
Wing Span: 5 3/4" Length: 9 3/4"

X-45B GREY BOEING
The Boeing X-45 UCAV (Unmanned Combat Air Vehicle) is a concept demonstrator for a next generation of completely autonomous fighter aircraft, developed by Boeing's Phantom Works (a Skunk Works-like division acquired through McDonnell Douglas).

Scale: 1/48
Wing Span: 11 1/4" Length: 8 1/4"

D-558-2 SKYROCKET
The Douglas Skyrocket (the D-558-2) was a rocket-powered research aircraft built by the Douglas Aircraft Company for the U.S. Navy.

Scale: 1/32
Wing Span: 9 1/4" Length: 18 1/2"