The Douglas A-4 Skyhawk only achieves top speeds of .5 the speed of sound.
 Airliners of the World
Stall speed: 97 mph (156 km/h, 84 kn) at landing weightRange: 5,635 mi (9,069 km, 4,897 nmi) , max fuel, 15,310 lb (6,940 kg) payload at 274 mph (238 kn; 441 km/h) at 15,000 ft (4,600 m) with no allowances4,635 mi (7,459 km; 4,028 nmi), max payload with no allowancesService ceiling: 21,700 ft (6,600 m) at max A

