Page 10 - Aerotech News and Review, May 28, 2021

On this date ...

June 1, 1951: Air Force aeromedical research Maj. John P.
Stapp was strapped into a rocket sled which was poised on
a 2,000-foot deceleration track at North Base, Edwards AFB,
May 29, 1956: The Chance Vought Regulus II Calif. Moments later, 4,000 pounds of rocket thrust blasted
(XSSM-N-9) made its first flight after a 2.3 mile him down the track and into the braking system (from 88.6 June 4, 1969: Lockheed’s C-5A Galaxy Number Two, the world’s largest
takeoff run from the lakebed at Edwards Air Force mph to a full stop in 18 feet). For a brief instant, he endured transport aircraft, arrived at the Air Force Flight Test Center, Edwards Air
Base, Calif. This test version of the Navy jet-propelled 48 G’s, with a rate of onset of about 500 G’s per second. In Force Base, Calif., for joint Air Force-contractor Category I and II testing.
cruise missile was fitted with a tricycle landing gear other words, his body had absorbed an impact of more than
and, according to the Edwards history office it had four tons. Prior to Stapp’s sled experiments, conventional
a tendency to outrun its chase and airborne control medical wisdom had maintained that the human body could
aircraft. probably survive no more than 17-18 instantaneous Gs.

June 4, 1971: The Martin Marietta X-24A prototype aircraft
made its last flight on this day. After 28 flights, Air Force
June 3, 1949: The XF-90 made its first flight, flown by engineers redesigned and heavily modified the blunt-shaped
May 30, 1958: The Douglas DC-8 four-engine passenger liner Lockheed test pilot Tony LeVier. The XF-90 was Lockheed’s X-24A and renamed it the X-24B. Tne “B” model possessed
was flown for the first time, at Edwards Air Force Base, Calif., entry into the Air Force’s Penetration Fighter competition, a longer fuselage, increased width, and sharply changed
piloted by A.G. Heimerdinaer. but never went into production due to being underpowered. platform.

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