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Lent by Dryden Flight Research Center
The XLR-11 four-chamber liquid-propellant rocket served as a workhorse
for the early X-plane research aircraft program of the later 1940s and
early 50s. It used ethyl alcohol and liquid oxygen as propellants to
generate a maximum thrust of 6,000 lbs. The XLR-11 was the first
liquid-fuel rocket engine developed in the United States for use on
airplanes. The engine was first used in famous the Bell X-1. This was
the first airplane to fly faster than the speed of sound, the X-1 named
"Glamorous Glennis" being flown beyond the sound barrier by Chuck Yeager
on October 14th, 1947. This engine also powered the X-1A, X-1B, XF-91,
X-15, and several wingless lifting body research vehicles.
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