Universal Curiosity on X: "Pratt & Whitney R-4360 Radial "Corn Cob" Engine. this is an amazing old airplane engine, it's 4 radial piston banks - total of 28 pistons! https://t.co/3fW3YbzO0G" / X
Pratt & Whitney R-2800 Double Wasp - Wikipedia
Pratt & Whitney Twin Wasp R-1830-92 Radial Engine | National Air and Space Museum