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.
XA2D Skyshark 500 mph+. The world's fastest single engine turboprop. Flew from 1950 to 1954. Fastest Aircraft of the 1940's: Grumman F9F Panther 575 mph. It was Grumman's first production jet fighter, deployed from 1949 to 1958. MiG-15 670 mph. It was the fastest Soviet military fighter aircraft of the Korean War and was deployed from 1949 to 1969.