Medical Definition of coprophilia. : marked interest in excrement; especially : the use of feces or filth for sexual excitement.
A scramjet (supersonic-combustion ramjet) is a ramjet engine in which the airflow through the whole engine remains supersonic. The highest speed attained by a rocket-powered airplane, NASA's X-15 aircraft, was Mach 6.7. The fastest air-breathing, manned vehicle, the SR-71, achieved slightly more than Mach 3. The X-43A more than doubled the top speed of the jet-powered SR-71.
But it wasnât until the 1960s that scramjets were actually tested in the lab. To date, NASA still holds the scramjet speed record for its X-43a experimental aircraft which achieved Mach 9.68 on November 16, 2004. X-51A Waverider, U.S. Air Force graphic (Credit: Wikipedia) âCompared to a Boeing 747, if you look at designs for hypersonic aircraft they really donât have very much wing surface area at all,â said Goyne.