Avro 501

Avro
Industry	Aerospace, Defence
Founded	1910
Headquarters	United Kingdom
Products	Aircraft

Template:Infobox aircraft The Avro Type H, also known as the Type 501 and Type 503, represented an early series of British military seaplanes. These aircraft evolved from the Avro 500 model and were initially designed as amphibious planes, featuring a single large main float with integrated wheels beneath the fuselage, accompanied by two smaller outrigger floats mounted under the wings.

Design and development

In January 1913, flight trials took place on Windermere. Subsequently, the aircraft was modified to adopt a twin-float layout and was acquired by the British Admiralty. However, due to excessive weight, it underwent another transformation into a landplane.^[1]

An enhanced variant, designated the 503, was presented to the Inspector of Naval Aircraft, who then ordered three units. The prototype was also showcased during seaplane trials for the Imperial German Navy in June 1913 and subsequently purchased by the German Empire government for assessment. Notably, this aircraft achieved the first aerial crossing of the North Sea, flying from Wilhelmshaven to Heligoland in September 1913. The manufacturer Gotha obtained a licence from Avro to produce this model under the name WD.1 (Wasser Doppeldecker – "Water Biplane").^[1]