A later variant, the F2A-2, of which 43 were ordered by the U.S. Navy, included a more powerful R-1820-40 engine, a better propeller, and integral flotation gear, but still lacked pilot armor and self-sealing tanks. The increase in engine power was welcomed, but to some extent offset by the increased loaded weight (5,942 lb/2,701 kg) of the aircraft; while top speed was increased to a respectable 323 mph (520 km/h) at 16,500 ft (5,029 m), initial climb rate dropped to 2,500 ft/min. Both the F2A-1 and the F2A-2 variants of the Brewster were liked by early Navy and Marine pilots, including Pappy Boyington, who praised the good turning and maneuvering abilities of the aircraft. Boyington is alleged to have opined "...the early models, before they weighed it all down with armor plate, radios, and other they were pretty sweet little ships. Not real fast, but the little [aircraft could turn and roll in a phone booth." as he stated in his autobiography "Baa Baa black sheep" This might be expected from the low wing loading, in earlier versions comparable with the Mitsubishi A6M Zero's 22 pounds per square foot.