One of the biggest problems during the NAA testing portion of the program occurred during the ground testing of the large engine, the XLR-99, installed in the X-15 airframe. This occurred at Edwards Air Force Base at the thrust stand facility. We were running complete static tests on the aircraft with the large engine prior to its first flight. The X-15 was completely fueled, Crossfield was in the cockpit, the canopy closed, all the test engineers were in the blockhouse, a situation that could make the pilot feel expendable [*], and all instrumentation had been installed and was checked out.He survived an explosive acceleration of 50 Gs: photos of the test aftermath are here [French translation].
The test director gave the pilot the go-ahead, and Scott proceeded to start the engine and advanced the throttle to a high thrust, then lowered the power. This was repeated several times. On about the second or third time, there was a tremendous explosion. The cockpit moved about 20 ft forward, the aft fuselage and tankage disappeared, and flames enveloped the whole area. While the flames were still roaring around, one of the ground crew members got Scott out of the cockpit, and fortunately with no personal injury to either party.
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Q. Okay, Mr. Crossfield, you said that people make a big deal of test pilots. The (pilots) are really just individuals. Would you comment on that please?
A. Well, we keep talking about test pilots but there is no such thing as a "test pilot." There are all kinds of people. There are tall people, small people. Some of them are functionally illiterate and some are intellectual. Some are moral. Some are immoral. They are all just people who incidentally do flight tests. It is a profession just like anything else. There is not, to my mind, any common thing called a test pilot.
Q. ...When you were speaking before, you said that the idea of the hero is really kind of silly.
A. The opportunity to be a test pilot...is there for all--and probably within the grasp of most. In my mind, we should divest ourselves of this idea of special people (being) heroes, if you please, because really they do not exist.
posted by grabbingsand at 12:01 PM on April 20, 2006