The all-metal design was increasing in popularity, and the Delphin was also important for the development of the Dornier Komet and Merkur land planes.

It had an enclosed cabin for four-passengers with the wing mounted above, and the nacelle-mounted engine above that.

The pilot had an open cockpit on the upper surface of the hull behind the engine, which gave him a limited view forward.

[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.

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.