BMW 802
The BMW 802 was an air-cooled aircraft engine with 18 cylinders, which were arranged in two 9-cylinder stars one behind the other ( double radial engine ). Like the related BMW 801, the bore and stroke were each 156 mm. The displacement was accordingly 53.67 l.
As with almost all multiple radial engines , the rear star was offset in such a way that its cylinders were not covered by those of the front star. The cooling air could also flow directly to the cylinders of the rear star.
A single-stage, mechanically driven three-speed charger provided a starting power of 2,600 hp. At an altitude of 12,000 m, the power was still 1,600 hp. The power was transmitted via a four-blade adjustable propeller with a diameter of 3.80 m. In addition, BMW developed an engine cover that enabled improved aerodynamics on the inside and outside . This fairing was derived from a similar project of the BMW 801. However, it was not used. The project was discontinued towards the end of the Second World War on the orders of the Reich Aviation Ministry (RLM).
P.8011
The engine was based on the BMW 802, but had two exhaust gas turbochargers and powered two counter-rotating three-blade propellers. The take-off power was 2,800 to 2,900 hp.