The de Havilland DH.81 Swallow Moth was aimed at the low-cost sporting aircraft market during the

Great Depression The Great Depression (19291939) was an economic shock that impacted most countries across the world. It was a period of economic depression that became evident after a major fall in stock prices in the United States. The economic contagio ...

. It was a single-engined two-seat low-wing monoplane; only one was built.

Development

The DH. 81 Swallow Moth was a low-wing cantilever monoplane. This arrangement and its plywood-covered fuselage and closely cowled 80 hp (60 kW) inline Gipsy IV engine gave it a very clean aerodynamic look. The wings carried ailerons that were horn-balanced at the wingtips and the empennage was of characteristic de Havilland form, with a balanced rudder. There was separate tandem seating for two, initially open, but later enclosed with a one-piece hinged cabin top. With this enclosure the aircraft was called the DH.81A and the top speed increased by 12 mph (19 km/h). The main undercarriage was simple, the legs reaching to mid-fuselage in front of the leading edge of the wing, with bracing struts fore and aft to the keel; the later Leopard Moth used a similar arrangement. A small tailskid completed the undercarriage. The Swallow Moth was first flown at Stag Lane Aerodrome by

Geoffrey de Havilland Captain Sir Geoffrey de Havilland, (27 July 1882 – 21 May 1965) was an English aviation pioneer and aerospace engineer. The aircraft company he founded produced the Mosquito, which has been considered the most versatile warplane ever built,D ...

on 21 August 1931. Some alteration to the fin followed and the flight testing continued until February 1932. During this time the class B marking ''E-7'' was allocated, but the Swallow Moth never reached the civil register. Its design influenced later de Havilland aircraft, particularly the 1938 Moth Minor.

Variants

;DH.81 :Original configuration with a two-seat open cockpit. ;DH.81A :Prototype modified with an enclosed cabin and flown from November 1932.

Specifications

References

Notes

Bibliography

* {{de Havilland aircraft 1930s British sport aircraft Swallow Moth Single-engined tractor aircraft Low-wing aircraft Aircraft first flown in 1931