Dornier Delphin

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Delphin
Bundesarchiv Bild 102-05956, Dornier-Flugboot "Delphin III".jpg
Delphin III in 1928
Role Commercial flying boat
Manufacturer Dornier Flugzeugwerke
First flight 1920

The Dornier Delphin (en: Dolphin) was a 1920s German single-engine commercial flying boat built by Dornier Flugzeugwerke. As well as commercial users, single examples were acquired by the United States Navy and the British Royal Navy for evaluation.

Development[edit]

The Delphin I was developed in 1920. It was an all-metal single-engine high-wing monoplane flying boat. It had an enclosed cabin for four-passengers with the wing mounted above, and the nacelle-mounted engine above that. It was powered by a 138 kW (185 hp) BMW IIIa inline engine. The pilot had an open cockpit on the upper surface of the hull behind the engine, which gave him a limited view forward. It first flew on the 24 November 1920. Dornier first tested the design concept and spontoons in place of wingtip floats, with a small three-seater named the Dragon Fly[1]

An improved version, the Delphin II, first flew on 15 February 1924, and was powered by either a 186 kW (250 hp) BMW engine or a 194 kW (260 hp) Rolls-Royce Falcon III engine. The enclosed cabin now had room for two crew and five passengers.

Following the success of the Delphin II, a larger version, the Delphin III was developed from 1927. It was powered by a 447 kW (600 hp) BMW VI engine and had a separate flight deck for the two-man crew and a cabin for ten passengers.

A Delphin I was acquired by the United States Navy, and a Delphin III by the Royal Navy, both of whom were interested in evaluating the metal construction.

Variants[edit]

Delphin I
Four-passenger version with open cockpit, powered by a 138 kW (185 hp) BMW IIIa inline engine
Delphin II
Five-passenger version, powered by either a 186 kW (250 hp) BMW engine or a 194 kW (260 hp) Rolls-Royce Falcon III engine.
Delphin III
Ten-passenger version, powered by 447 kW (600 hp) BMW VI engine

Specifications (Delphin III)[edit]

General characteristics

  • Crew: two
  • Capacity: ten passengers
  • Length: 14.35 m (47 ft 1 in)
  • Wingspan: 19.60 m (64 ft 3¾ in)
  • Height: 4.05 m (13 ft 3½ in)
  • Wing area: 62 m2 (667.38 ft2)
  • Empty weight: 2,900 kg (6,393 lb)
  • Gross weight: 3,900 kg (8,598 lb)
  • Powerplant: 1 × BMW VI inline piston engine, 447 kW (600 hp)

Performance

  • Maximum speed: 180 km/h (112 mph)
  • Service ceiling: 4,500 m (14,765 ft)

See also[edit]

Related lists

References[edit]

  1. ^ "The Dornier Dragon Fly Flying Boat" FLIGHT, October 20, 1921