| The Pratt & Whitney R-2800 Double Wasp, 18 cylinder (double-row 9) air cooled radial engines were rated at 2,000 HP (takeoff). Dash 21 engines were built by the Ford Motor Company under license from Pratt and Whitney. Many Invaders were equipped with dash 79 engines. |
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| Pratt and Whitney R-2800 Double Wasp |