Very nice. At one point I was marginally involved with an overhaul of a The Pratt & Whitney R-4360 Wasp Major, a large 28-cylinder supercharged air-cooled four-row radial piston aircraft engine.

Pratt & Whitney Wasp R-1340 SC1, Radial 9 Engine National Air and Space Museum. Click to open image viewer. CC0 Usage Conditions Apply Click for more ... The Wasp R-1340 remained in production until ...

The Wasp Major was Pratt & Whitney Aircraft's last and largest piston engine. Its cylinders were in four rows, arranged in a spiral for better cooling. Initially producing 2,237 kW (3,000 shp), later ...

Radial engines weren't new (the Wright R-790 Whirlwind had already seen use), but this was an evolution. Named for the buzzing sound it emitted, the Wasp was a smoothly-operating engine enhanced ...

A few of the 56 sparkplugs can clearly be seen in this 1942-era Pratt & Whitney R-4360 radial "Wasp Major" aircraft engine. It is owned by Mike Nieman and is parked at his shop, 1132 Main St. in ...