Thunderbolt, America's fighter (P.47) was operating from British bases, it had a span of 41 ft., length 32 ft., and weighed 13,500lb. Its powerful armament consisted of eight 0.5 in', machine-guns, having a combined rate of fire of 6,400 rounds a minute. A single-seat, low-wing monoplane, it was designed for high altitude performance and was powered by a 2,000 h.p. engine giving a speed of about 400 m,p.h. 1: Thunderbolts in flight. 2: Four guns in each wing give this plane a deadly-punch. 3: The Thunderbolt's nose. 4: Taking off. .