Fairey III - Development and Design

Development and Design

The prototype of the Fairey III was the N.10 floatplane, which was designed and built in 1917 by Fairey Aviation (along with the smaller N.9) to meet Admiralty Specification N.2(a) for a carrier-based seaplane for the Royal Naval Air Service during the First World War. N.10, also known by its constructer's number F.128 was a two-bay biplane with folding wings and powered by a 260 hp (190 kW) Sunbeam Maori engine. It first flew from the Port Victoria seaplane station on the Isle of Grain, Kent on 14 September 1917.

Following tests both as a floatplane and with a conventional wheeled undercarriage, production orders were placed for two versions both powered by the Maori, the IIIA and IIIB, with 50 and 60 aircraft planned, respectively. The Fairey IIIA was a reconnaissance aircraft intended to operate from aircraft carriers, and as such was fitted with a wheeled or skid undercarriage, while the IIIB was intended as a floatplane bomber, with larger span (increased from 46 ft 2 in/14.19 m to 62 ft 9 in/19.13 m) upper wings and a bombload of three 230 lb (105 kg) bombs. While all 50 IIIAs were built, only 28 of the IIIBs were completed as intended, as a new improved bomber/reconnaissance floatplane, the Fairey IIIC was available, of which 36 were produced, which reverted to short equal-span wings like the IIIA but was powered by the much more powerful and reliable 375 hp (280 kW) Rolls-Royce Eagle VIII engine and could still carry a useful bombload. Many of the IIIBs were completed as IIICs.

The first major production model was the IIID, which was an improved IIIC, with provision for a third crewmember and capable of being fitted with either a floatplane or a conventional wheeled undercarriage. It first flew in August 1920, powered by a Rolls-Royce Eagle, and initial production for the Fleet Air Arm, together with aircraft produced for Australia and Portugal retained the Eagle, while later aircraft were powered by the more powerful Napier Lion. The naval variants were usually three-seaters; pilot, observer and gunner and the wings would could be folded back parallel to the fuselage for storage aboard ship. In floatplane configuration, carrier-borne Fairey IIIs would be launched from the deck using a trolley and would land on the water upon their return. The Fairey III floatplane could also be catapult-launched from a ship. The IIID had a wooden, fabric-covered fuselage and usually a wooden, two-blade, fixed-pitch propeller. One IIID was built with metal wings and floats. A total of 207 IIIDs were produced for the Fleet Air Arm and RAF, with a further 20 being built for export.

A Fairey III floatplane (G-EALQ) with a 450 hp Napier Lion was entered into the Air Ministry Commercial Amphibian Competition of September 1920.

The most prolific and enduring of the Fairey IIIs was the final model, the IIIF, which was designed to meet Air Ministry Specification 19/24 for a three-seat spotter/reconnaissance aircraft for the Fleet Air Arm and a two-seat general purpose aircraft for the Royal Air Force. The IIIF, which first flew on 20 April 1926, had a more streamlined engine installation and initially a fuselage of mixed metal and wooden construction, with similar wings to the IIID, although later production aircraft were fitted with an all-metal fuselages and wings.

Over 350 IIIFs were operated by the Fleet Air Arm, making it the most widely used type of aircraft in Fleet Air Arm service between the wars. In fact, of the British military aircraft in the inter-war years, only the Hawker Hart family was produced in greater numbers.

Three IIIFs were modified as a radio-controlled gunnery trainer, known as the Fairey Queen. The Fairey IIIF was also the basis for development of the Gordon and Seal.