[PAR] [TLE] Walter HWK 509 [SEP] The Walter HWK 109-509 was a German liquid-fuel bipropellant rocket engine that powered the Messerschmitt Me 163 Komet and Bachem Ba 349 aircraft.  It was produced by Hellmuth Walter Kommanditgesellschaft (HWK) commencing in 1943. [PAR] [TLE] Messerschmitt Me 163 Komet [SEP] The Messerschmitt Me 163 Komet was a German rocket-powered fighter aircraft.  Designed by Alexander Lippisch, it is the only rocket-powered fighter aircraft ever to have been operational and the first piloted aircraft of any type to exceed 1000 km/h (621 mph) in level flight.  Its design was revolutionary and its performance unprecedented.  German test pilot Heini Dittmar in early July 1944 reached 1130 km/h , an unofficial flight airspeed record unmatched by turbojet-powered aircraft for almost a decade.  Over 300 aircraft were built, but the Komet proved ineffective in its dedicated role as an interceptor aircraft and was responsible for the destruction of only about nine to eighteen Allied aircraft against ten losses.  Aside from combat losses many pilots were killed during testing and training.
[PAR] [TLE] Walter HWK 509 [ SEP ] The Walter HWK 109 - 509 was a German liquid - fuel bipropellant rocket engine that powered the Messerschmitt Me 163 Komet and Bachem Ba 349 aircraft . It was produced by Hellmuth Walter Kommanditgesellschaft ( HWK ) commencing in 1943 . [PAR] [TLE] Messerschmitt Me 163 Komet [ SEP ] The Messerschmitt Me 163 Komet was a German rocket - powered fighter aircraft . Designed by Alexander Lippisch , it is the only rocket - powered fighter aircraft ever to have been operational and the first piloted aircraft of any type to exceed 1000 km / h ( 621 mph ) in level flight . Its design was revolutionary and its performance unprecedented . German test pilot Heini Dittmar in early July 1944 reached 1130 km / h , an unofficial flight airspeed record unmatched by turbojet - powered aircraft for almost a decade . Over 300 aircraft were built , but the Komet proved ineffective in its dedicated role as an interceptor aircraft and was responsible for the destruction of only about nine to eighteen Allied aircraft against ten losses . Aside from combat losses many pilots were killed during testing and training .
The Walter HWK 109-509 powered the first piloted aircraft of any type to exceed how many MPH in level flight?
The Walter HWK 109 - 509 powered the first piloted aircraft of any type to exceed how many MPH in level flight ?
621
621