Pratt & Whitney R-2800 Double Wasp Engine Full Scale Moving Cutaway Model @ USS midway navy ship
More on this motor here
Spent the day in San Diego CA on the USS midway navy ship museum. Well worth a visit if you in the airea. But give your self all day to explore the ship. Lots to see!!!
This was a full size working cutaway of this motor. It was really cool so see this cutaway moving. I would defiantly put this in my shop if I had room lol.