S1039 was one of two Southamptons that undertook a flight from the UK to Egypt to demonstrate the capabilities of the new flying boat. Photo from: Imperial War Museums

J7782 Hawker Hornbill probably seen here in July 1926 at Brooklands in its final configuration of one central radiator. Only one Hornbill was ever built and made its final flight in May 1933. From my collection.

A nice photo from the 1926 German seaplane contest, assumed taken at the host site, Warnemünde. Photo from: ETH-Bibliothek Zürich

The Heinkel HE 1 (E for Eindecker or monoplane) was designed by Ernst Heinkel as the Caspar S.1 before Heinkel started his own business at Warnemünde in 1922. In Sweden the Heinkel seaplanes were called 'Hansa' as they looked similar to Heinkel's earlier designs for Hansa-Brandenburg. Photo from: ETH-Bibliothek Zürich

Udet contender for German seaplane competition. Crashed at Lake Starnberg, Bavaria in October 1926. Photo from: ETH-Bibliothek Zürich

Napier Lion-engined prototype of the Heinkel HE 5, successfully flown during the 1926 German seaplane competition and probably photographed at Warnemünde which hosted the event. A Rohrbach Robbe is seen in the background. The HE 5 was to play an important role in the Swedish air force, designated S5 and nicknamed Hansa due to its resemblance to older Hansa-Brandenburg types designed by Ernst Heinkel. Photo from: ETH-Bibliothek Zürich

Adolf Rohrbach's company produced some impressive all-metal aircraft but faced tough competition from Dornier and Junkers. Two examples were built of the Robbe I, designed by Kurt Tank. Photo from: ETH-Bibliothek Zürich

The first prototype of the Junkers W33, first flown on 17 June 1926 from the river Elbe near Dessau. One month later two W33s took part in a seaplane competition at Warnemünde and D-921 took second prize. Photo from: ETH-Bibliothek Zürich