Now...what vehicle could this find a home in?
Google translate wrote:Pratt & Whitney R-8720 (5600 XBSAP) - air cooled four-term 7000-star 56-star 56 cylinder (56 cylinders) with a volume of 143 liters and a power of 7000 hp.
It is essentially a double large Pratt & Whitney R-4360 Wasp Major, designed and produced during World War II. It was the last type of Wasp engines and the peak of piston engines production. The war ended before the engine could be deployed in combat, yet it powered the last generation of piston planes ahead of jet and turbovtul aircraft. It was a four-star engine with 28 cylinder (7 in each star); each row was slightly off than the previous one, so the engine was arranged with a screws to make each row cooled better. The engine content was 4 cubic inch (71,488 liter). From the radial cylinder and the engine volume specified in cubic thumbs, the type designation R-4360. The first version developed a power of 3 hp (2 kW), but the last type already 4 300 hp (3 206,5 kW). The engine weighed from 1 579 to 1 kg, which was a lot, but only a few other engines matched its power to weight ratio. Thanks to the cylinder arrangement, the engine got the nickname corncob (corn clas). The R-4360 was produced between 1944 and 1955 and 18 were 697 units. It was originally supposed to drive B-29 Superfortress bombers, but after stocking these engines was marked to B-50. The title photo comes from the famous Reno Air Races 2013.
Imagine trying to fault-find a misfire in that
