Supermarine Aircraft Spitfire Aircraft company and produce all-Australian homebuild aircraft kits. In the event, the constant-speed, four-blade propeller would be obtained from a specialist firm in New Zealand. Supermarine Aircraft is not related to the original British Supermarine company, although the owners of the Supermarine marque have given their permission for the name to be used. The first production model was named the Spitfire Mk25 and was a 75% scale replica of the original Supermarine Spitfire design. The stressed skin structure consists of 2024 aluminium alloy skins, formers and longerons with some fibre-glass mouldings for parts such as fairings and air scoops. The
British military aircraft designation systems by Manufacturer Name and Specification Number. If accepted they would get a service name. For example, the "Fairey 6/22"; this being the 6th specification issued in the year 1922 that was accepted as the "Fairey Flycatcher". Later, a preceding letter was added to the Specification Number to identify the type of aircraft; e.g. the "Bristol B.28/35", a bomber aircraft, the 28th specification of the year 1935, which would become the Bristol Blenheim. From about 1910, the largest single designer of aircraft for the British Army's Royal Flying Corps was the Royal Aircraft Factory. The Royal Aircraft Factory designated its types