The Vickers No 1 was based on a REP design, but used originally designed wings. It was powered by a 5-cylinder, air cooled REP engine developing 60 h.p. The second airframe was sold to Douglas Mawson for possible use in an Antarctic expedition, but was badly damaged in a crash landing at Adelaide in October 1911. The remains (the fuselage and engine) were used by the expedition as a motorized sledge or "air tractor", but engine problems made it more or less useless. The remains are buried in the ice at Cape Denison, where efforts have been made to retrieve it.