With a designed speed of 128 mph, the fastest of these rides is Kingda Ka at Six Flags in New Jersey
... fastest coaster, Kingda Ka is a heart-pounding attraction located at Six 
Flags ... it drops riders 418-feet at a terrifying 90 angle at speeds of up to 128 
mph,... [DOC] [TLE] 10 Highest Roller Coasters on Earth - Entertainment Designer [PAR] Sep 20, 2010 ...