In Ancient Greek, one of the final two or three syllables of a word carries an accent. Each syllable may contain one or two vocalic morae, but only one can be accented; accented morae are pronounced at a higher pitch.
US military to launch fastest-ever plane. By the time you finish reading this sentence, the Falcon HTV-2, the fastest plane ever built, could have flown 18 miles. It would get from London to Sydney in less than an hour, while withstanding temperatures of almost 2,000C, hotter than the melting point of steel.
View full size image. The world's fastest manned plane is the Lockheed SR-71 Blackbird. It set a record of 2,193.2 miles per hour (3,530 kilometers per hour) at Beale Air Force Base in California back in 1976. The U.S. Air Force used this manned aircraft from 1964 to 1998. The fastest unmanned plane is the NASA X-43, which flew at 7,000 mph (11,265 kph) in 2004 (that's Mach 9.8 if you're keeping track). The X-43 flies on the back of a winged booster rocket, called a stack, which is launched from a larger B52 bomber.