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Blackburne Tomtit


The Blackburne Tomtit was a 670 cc V-twin aero engine for light aircraft that was designed and produced by Burney and Blackburne Limited. Burney and Blackburne were based at Bookham, Surrey, England and was a former motorcycle manufacturer.

The Blackburne Tomtit engine was developed from Blackburne's motor-cycle engines. The first one adapted to aircraft use was the best performing engine at the Lympne light aircraft trials of 1923, despite the lack of refinement. The Tomtit was a modified version of the Lympne 696 cc V-twin, marketed specifically for flight.

The Tomtit could run upright or inverted and was the first British engine to fly inverted, in the ANEC I. The inverted configuration was more common, but the Avro 558 used it in the upright arrangement, and the Avro 560 flew with both upright and inverted Tomtits.

Avro 558
Avro 560
BICh-3 (the world's first flying wing)
Darmstadt D-11 Mohamed
de Havilland Humming Bird
Gloster Gannet
Gnosspelius Gull
Handley Page H.P.23
Heath Parasol
Parnall Pixie II
Reid biplane
Short Cockle
Wheeler Slymph


Type: Vee twin four stroke piston engine
Bore: 71 mm (2.80 in)
Stroke: 88 mm (3.46 in)
Displacement: 696 cc (42.5 cu in)
Dry weight: 34 kg (75 lb)
Power output: 16 hp (12 kW) at 2,400 rpm
Specific fuel consumption: 0.58 pint (0.33 litre) per hp per hour
Oil consumption: 0.035 pint (0.02 litre) per hp per hour



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