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The Supermarine Sea Urchin was an unbuilt British racing biplane flying boat designed by the Supermarine Aviation Works to compete in the 1924 Schneider Trophy. It was to be a single seat biplane, powered by a Rolls-Royce Condor V-12 water-cooled engine buried in the fuselage, driving a pusher propeller mounted on the upper wing via geared shafts. It was abandoned without being built owing to problems with the engine and the transmission required to drive the propeller.

Specifications (Sea Urchin - estimated)

Data from Supermarine Aircraft Since 1914

General characteristics

• Crew: 1
• Powerplant: 1 × Rolls-Royce Condor V-12 water-cooled piston engine, 600 hp (450 kW) driving the propeller through bevel gearboxes and a transmission shaft
• Propellers: 4-bladed fixed-pitch pusher propeller

See also

• List of flying boats and floatplanes

References

1. ^ Andrews & Morgan 1981, pp. 174–175, 356.

Sources

• Andrews, Charles Ferdinand; Morgan, Eric B. (1981). Supermarine Aircraft since 1914. London: Putnam. ISBN 978-03701-0-018-0.

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• 1920s British sport aircraft
• Flying boats
• Supermarine aircraft
• Single-engined pusher aircraft
• Biplanes
• Schneider Trophy
• Mid-engined aircraft
• 1920s aircraft stubs