The second aircraft, the Bristol Type 75 was powered by the preferred Jupiter engine, which was mounted forward of a fireproof bulkhead, with the entire engine installation (or ""power-egg"") capable of being swung open like a gate to allow easy access to the rear of the engine. The Type 75 was designed to accommodate eight passengers and two crew. This aircraft, registered "G-EBEV", first flew in July 1922. A third aircraft, the Bristol Type 79 was ordered by the Air Council to meet a requirement (Specification 32/22) for a single-engined ambulance landplane for the Royal Air Force. It was fitted with wings of greater chord, and had accommodation for three stretchers and an attendant or two stretchers and four sitting patients.