Cirrus Major

Cirrus Major

The Cirrus Major started life as a development of the original Cirrus series of aircraft engines which progressed through a number of variants Cirrus I, II, & III. Each with slightly different displacement and power. Later Cirrus was bought by Hermes Engine Company and they produced the Cirrus Hermes I, II, III and IV. Again each differing slightly in displacement and power.

In 1934 Cirrus was bought again by the Blackburn Aircraft company and later that year the Cirrus Minor was produced and in 1935 the Cirrus Major was produced.


;Cirrus Major II:150hp variant.;Cirrus Major III:Higher compression engine with an increase in output to 150hp (116kW).

pecifications (Cirrus Major)


type=inline air cooled inverted 4 cylinder
bore=120 mm (4.72 in)
stroke=130 mm (5.12 in)
displacement=386.1 cu in (6.33 L)
length=1,075 mm (42¼ in)

width=433 mm (17 in)
height=747 mm (29½ in)
weight=147 kg (325 lb)
valvetrain=1 inlet and 1 exhaust valve per cylinder
fuelsystem=1 Claudel-Hobson carburetor
fueltype=70 octane
power=148 hp (110 kW) @ 2,450 rpm
power/weight=0.336 hp/lb @ cruise speed


* Hendy 302
* Miles Aerovan
* Miles Gemini
* Miles Messenger
* Miles Mercury
* Simmonds Spartan
* Stampe SV.4



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