ADC Cirrus engines were originally built by ADC Aircraft until Cirrus Aero Engines Limited was formed in 1927. Cirrus I on the left Cirrus II on the right. These engines are in the Finnish Air Force Museum. Photograph by Yanor Dinkov.
The company became Cirrus-Hermes in 1931 when it was bought by the Cirrus Hermes Engineering Company and later became the Cirrus Engine Section of Blackburn & General Aircraft Limited in 1934, and operated as a separate division until production ended in the post-World War II era.
Cirrus's first product was the 90 hp (67 kW) Cirrus I, which passed its 50-hour type rating in 1925. It was the first air-cooled inline engine, a design by Frank Halford that proved extremely popular for light aircraft. In early 1927 it was re-engined with an 85 hp (63 kW) ADC Cirrus engine as the Type 581A and sold to Bert Hinkler- above.
Production aircraft were designated Type 594 and were built in a number of versions, mainly powered by Cirrus engines.
On display at the Science Museum, London
Commenting on this remarkable achievement, Major Halford points out that comparing the performance with that of the average car engine, the mileage flown (51,000) represents about 5 years (at 10,000 miles per annum) of car mileage, incidentally, without failure, without overhaul and without even decarbonising.
Page 32, December 1929 Motorsport Magazine
LIGHT PLANE POWER PLANTS.
The Air-Cooled Four-in-Line is the Pioneer of Post-War Low-Powered Engines with many Records to its Credit.
In the late 1920s, the famous pilot, Marcel Desoutter formed the Desoutter Aircraft Company to follow up his marketing idea to licence manufacture the Dutch aircraft Koolhoven F.K.41. This aircraft had drawn a lot of attention due to its modern design. The licence was obtained and Desoutter set up a production unit at Croydon Aerodrome in the former ADC Aircraft factory. This Mk 1 is powered by Cirrus Hermes engine, 28 were built.
This airplane registered G-AAPZ is a flyable Desoutter I and is in the Shuttleworth Collection, UK.
Bert Hinkley (1892-1933) was an Australian pioneer aviator (dubbed "Australian Lone Eagle") and inventor. Here he is with his Avro Avian with an 85 hp (63 kW) ADC Cirrus engine as the Type 581A. Bert made the first solo flight between England and Australia, using Avro 581 Avian G-EBOV. Leaving London/Croydon on 7 February, he arrived at his home town of Bundaberg, Queensland, on 27 February. The flight took 128 flying hours and in the process Hinkler had smashed the old record time between the two countries from 28 to just over 15 days.
May 1927 saw the improved successor model Avro 594 Avian II . Six machines were built and also equipped with the Cirrus II. The machines differed from the 594 Avian I by the retractable wings and the modified chassis, they were equipped with the Hinkler patent, which this had first installed in the Avro 581 . One of these machines won the altitude competition at the Copenhagen Flying Meeting in Kastrup, Denmark, reaching 3886 meters in 90 minutes on 4 September 1927. On the return flight to Hamble, the pilot faltered due to compass failure and had to close the machine due to lack of fuel near the Isle of Wight. Photo courtesy of Brian Richards taken 1998 Cranfield PFA Rally, privately owned.
Summer 1928 – Amelia bought an Avro Avian, a plane famous because Lady Mary Heath, Britain’s foremost woman pilot, had flown it solo from Capetown, South Africa, to London. A link to the official Amelia Earhart is in the links below.
Maldives stamp produced on 23rd March 2017 to commemorate the disappearance of Amelia Earhart 80 years on. How lovely.
Discovery of a 1927 AVRO AVIAN aircraft under a house in Brisbane sparked the idea of retracing Queenslander Bert Hinkler’s fabulous 1928 flight. In a similar AVIAN, Hinkler became the first man to cover the 14,000 miles from England to Australia totally alone and 1998 was a very appropriate year in which to honour one of the greatest feats of aviation pioneering.
Lang Kidby flying in his 70th Anniversary Re-Enactment of Bert Hinkler’s 1928 First Solo Flight from England to Australia 1998