The Douglas C-1 was the first in the long family of Douglas transport aircraft and was a biplane transport capable of carrying eight passengers or 2,500lb of cargo.
The Douglas C-74 Globemaster I was developed during the Second World War to serve as a very long range transport, but didn't enter production until just after VJ Day, and only a handful were ever completed.
The Bell XV-3 (Model 200) was a convertiplane powered by rotors mounted at the end of the wings, which could switch between vertical and horizontal positions. Although it was produced in the 1950s, it was also an early step in the development of the Bell Boeing V-22 Osprey, which entered development in the 1980s and service in the 2000s.
The Bell XV-15 was a successful experiment into tilt-rotor technology and played a major role in the development of the Bell Boeing V-22 Osprey.
The Bell Model 65 ATV was an experimental jet powered VTOL aircraft that successfully hovered and flew level, but never converted between the two.
The Bell X-22 was an experimental aircraft designed to test out the potential of a ducted-fan powered VTOL aircraft.
The Bell X-5 was an experimental swept wing aircraft inspired by the wartime Messerschmitt P.1011.
The Bell X-14 was a jet powered VTOL aircraft that was used extensively for tests and experiments between 1957 and 1981.
The Bell X-1 was an experimental rocket powered aircraft that was the first to breach the sound barrier in level flight.
The Bell X-2 was an experimental swept-wing rocket plane that was designed to explore the effects of flying at very high speeds above Mach 3, but both aircraft were lost before any significant work had been done
The Bell L-39 was the designation given to two P-63 Kingcobras when they were given experimental swept wings.
The Convair X-6 was a design for a version of the massive B-36 that would have been powered by nuclear turbojet engines. It was abandoned at an early stage.
The Bell FM-1 Airacuda was a twin engined escort fighter developed to operate with the B-17, but that never entered service due to its poor performance and limited manoeuvrability.
The Bell P-63 Kingcobra closely resembled the P-39 Airacobra, but was actually a new aircraft and not simply a modified P-39. Very few were used by the US, but a large number did serve in the Soviet Union.
The Consolidated B-32 Dominator was produced to the same specifications as the B-29 Superfortress, but took far longer to develop and was only ever produced in small numbers.
The Consolidated B-36 Peacekeeper was developed in response to the early German victories in 1939-40, but development was slow, and it ended up being Strategic Air Command's main long range bomber during the 1950s.
The Consolidated XC-99 was a transport aircraft based on the massive B-36 bomber, but only a single example was ever completed.The Consolidated XC-99 was a transport aircraft based on the massive B-36 bomber, but only a single example was ever completed.
The Consolidated C-109 was a fuel tanker produced from the B-24 Liberator and mainly used on the 'hump' between India and China.
The Consolidated C-87 'Liberator Express' was a transport version of the B-24 Liberator bomber that was produced in reasonable numbers and saw service with the USAAF, US navy, RAF and RAAF.
The Consolidated XA-11 was a two seat single engined attack aircraft developed from the Detroit/ Lockheed P-24, but only a handful of aircraft were produced.
The Consolidated P-25 was a two-seat single engined fighter that was produced in prototype form and then ordered into production as the Consolidated P-30.
The Consolidated P-30/ PB-2 was the only two man single engined fighter to see service with the USAAC between the wars, and was based on the P-25, itself a development of the Detroit/ Lockheed P-24.
The Consolidated PT-6 was a training aircraft based on the Fleet 2 civilian biplane.
The Consolidated XB2Y-1 was a design for a dive bomber produced for the US Navy, but that didn't get past the prototype stage.
The Consolidated Y1C-22 was the designation given to three Model 17 Fleetster transport aircraft ordered after the success of the similar Y1C-11.
The Consolidated N2Y was a version of the Fleet tandem-two seat trainer that was used for familiarization training for skyhook pilots operating with the airships USS Akron and USS Macon.
The Consolidated XBY-1 Fleetster was a single example of a Naval bomber based on the Model 17 Fleetster civil transport, and was the first Consolidated aircraft to have all metal wings.
The Consolidated Y1C-11 Fleetster was a single example of the commercial Model 17 Fleetster passenger aircraft used as a VIP transport by the USAAC.
The Consolidated PT-11/ BT-6 was an improved version of the PT-3 trainer, but was only produced in small numbers.
The Consolidated PT-12/ BT-7 was an improved version of the PT-1/ PT-3/ NY family of trainers, but only ten were ordered.
The Consolidated O-17 Courier was an advanced gunnery, photographic and radio trainer based on the Consolidated PT-3 trainer.
The Consolidated N4Y was the designation given to four Consolidated Model 21s used by the US Coast Guard and Navy.
The Consolidated NY was a Naval version of the Consolidated PT-1 trainer, and was produced in significant numbers in the mid 1920s.
The Consolidated XN3Y was a single example of the NY training aircraft powered by a 200-220hp Wright R-790-A engine
The Consolidated XPT-5 was a version of the PT-3 that used a Curtiss Challenger engine.
The Consolidated PT-8 was an experimental version of the PT-3/ O-17 family powered by a Packard diesel engine.
The Consolidated PT-3 'Husky' was an updated version of the PT-1 trainer that used the same Wright J-5 engine as the Navy's Consolidated NY trainers.
The Consolidated XPT-4 was a version of the PT-3 that used an experimental Fairchild-Caminez engine in place of the 220hp Wright J-5 (R-790) Whirlwind nine-cylinder air-cooled radial engine.
The Boulton Paul P.124 was a jet trainer designed to replace the Percival Provost, but that didn't enter production.
The Boulton Paul P.125 was a jet version of the P.108 Balliol, designed to replace the Percival Provost, but that didn't enter production.
The Boulton Paul P.131 was a design for a jet trainer, designed in response to Specification O.R.AIR/37, but that didn’t enter production.
The Consolidated PT-1 'Trusty' was an excellent training aircraft that laid the foundations for the Consolidated Aircraft Company.
The Consolidated PT-2 was a single example of a PT-1 that was powered by the same Wright J-5 engine that was used in the Navy's Consolidated NY family.
The Boulton Paul P.122 was a design for a rocket powered interceptor, designed in response to Specification F.124T.
The Boulton Paul P.123 was a design for a radio guided surface-to-surface missile, produced to fill a gap between the entry into service of the post-war 'V' bombers.
The Boulton Paul P.120 was a modified version of the delta winged P.111, briefly used to test an all-moving horizontal tail, before being lost in a crash.
The Boulton Paul P.121 was a design for a supersonic fighter that was produced with fixed or variable sweep wings.
The Supermarine Swift was the first British swept wing jet to enter service, the first RAF aircraft to use power-operated ailerons and the first to be armed with guided missiles, it served for a fighter for about a year then became a low level reconnaissance aircraft
The Supermarine Type 545 was a design for a jet fighter to replace the Supermarine Swift.
The Boulton Paul P.116 was a design for a primary trainer to replace the Tiger Moth.
The Boulton Paul P.119 was a private venture jet trainer that reached the mock-up stage but got no further.
The Supermarine Attacker was the first jet fighter to enter first line service with the Fleet Air Arm, but it was something of a interim design, with wings developed for the piston engined Spiteful, and had a fairly short front line career.
The Supermarine Scimitar was the first swept wing single seat jet fighter to be produced for the Fleet Air Arm, and was the first FAA aircraft to be capable of supersonic flight and to carry an atomic bomb.
The Boulton Paul P.112 was a design for a basic trainer to replace the Percival Prentice.
The Boulton Paul P.115 was a design for a primary trainer to replace the Tiger Moth and Percival Prentice.
The Supermarine Seafang was the naval version of the Spiteful, produced as a replacement for the Spitfire and Seafire. Like the Spiteful only a handful of aircraft were ever produced.
The Supermarine Spiteful was developed to replace the Spitfire, but by the time it was ready to enter service it was no longer needed, and only a handful were ever completed.
The Boulton Paul P.109 was a design for an advanced trainer powered by a Bristol Perseus engine.
The Boulton Paul P.111 was an experimental delta winged jet aircraft used for research into the performance of delta wings at high speed.
The Supermarine Nanok (Polar Bear)/ Solant was designed as a torpedo bomber for the Danish Navy, but was rejected and ended up being used as a pleasure craft by the Guinness family.
The Supermarine S.4, S.5, S.6 and S.6B were a series of Schneider Trophy winning floatplanes that were designed by R.J. Mitchell, and that played a part in the design of the Supermarine Spitfire by giving him experience of designing high speed stressed skin monoplanes.
The Boulton Paul P.107 was the company's last wartime design for a land based fighter. It was a two-seat long range escort fighter, powered by a Bristol Centaurus CE12SM engine.
The Boulton Paul P.108 Balliol was designed as a turboprop powered trainer but saw limited service as a standard piston engine powered trainer with the RAF and Fleet Air Arm.
The Supermarine Sheldrake was an amphibian aircraft produced for the British Air Ministry, but only one was ever built.
The Supermarine Swan was designed as a civilian airline, but the sole example was completed as a military reconnaissance aircraft.
The Boulton Paul P.105 was a design for a multi-use naval attack aircraft.
The Boulton Paul P.106 was a design for an elementary training aircraft, but that lost out to the Percival Prentice.
The Supermarine Scarab was an amphibian reconnaissance and bombing aircraft, produced in 1924 for the Spanish Navy.
The Supermarine Scylla was a flying boat originally designed to replace the Felixstowe F.5, but that was eventually used for taxing trials only.
The Boulton Paul P.103 was a design for a naval fighter based on the Defiant turret fighter.
The Boulton Paul P.104 was a design for a pusher naval fighter produced in response to Specification N.7/43.
The Supermarine Sea King was an amphibian scout and fighter aircraft that was produced in two variants, but didn't receive any orders. It did become the basis for the Sea Lion racing aircraft, and as the Sea Lion II won the 1922 Schneider Trophy.
The Supermarine Sea Lion was a racing version of the Sea King scout plane. Three versions were produced and were entered in the Schneider Trophy Races of 1919, 1922 and 1923, winning in 1922.
The Boulton Paul P.101 was a radical design for a staggered biplane fighter, produced in response to an Air Ministry specification for a manoeuvrable fighter with a high rate of climb.
The Boulton Paul P.102 was a project to fit a jet engine in an existing aircraft, but it suffered from high level indecision and was eventually cancelled.
The Supermarine N.1B was a single-seat scout designed to escort the RNAS's patrol flying boats.
The Supermarine Seal was an amphibian reconnaissance and fleeting spotting aircraft that served as the prototype for the successful Supermarine Seagull, which was itself the basis of the more famous Supermarine Walrus.
The Boulton Paul P.99 was a design for a twin-boom fighter produced in response to an Air Ministry specification for a manoeuvrable fighter.
The Boulton Paul P.100 was a design for a tail first fighter produced in response to an Air Ministry specification for a manoeuvrable fighter.
The Boulton Paul P.97 was a design for a twin engined night fighter produced after the Air Ministry decided that its F.18/40 specification couldn't be filled by a single engined fighter.
The Boulton Paul P.98 was a design for an advanced pusher fighter, produced in response to an Air Ministry specification for a manoeuvrable fighter with a high rate of climb.
The Boulton Paul P.95 was a design for a two man close support bomber that never progressed beyond the design stage.
The Boulton Paul P.96 was a series of designs for a night fighter produced in response to Air Ministry Specification F.18/40, for a two-seat aircraft armed with six 20mm cannon.