not fitted with double stage supercharger 250 lb (113 kg) to 1,000 Ib (453 kg), a total of 1,500 lb (680 kg) on three hardpoints (one under the fuselage and two underwing) documented high accident rate on the ground 650 250 lb (113 kg) to 1,000 Ib (453 kg), a total of 1,500 lb (680 kg) on three hardpoints (one under the fuselage and two underwing) 29,000 360