The aircraft was airborne when the wing dipped, and the Heinkel stalled and went into a horizontal cartwheel (akin to a ground loop, but at low altitude). It crashed and exploded in flames, killing Wever and his flight engineer. That same day, the RLM issued the Bomber A heavy bomber specification and design competition for what would become the Luftwaffe's only wartime heavy bomber in production and frontline service, the Heinkel He 177.[2]