See Armstrong-Siddeley.

“Siddeley-Deasy Logo”

-Logo taken from the front of a “Phaëton” car of this brand.  At a Barcelona-Sitges Rally.

-The factory built vehicles as the Siddeley-Deasy Motor Car Company.

-The facilities were in Coventry. It was a company of Sir W.G. Armstrong Whitworth.

“Plan and photo of the Puma”

-As we already know from the chapter by Armstrong-Siddeley and Deasy -sometimes written Deasey-, this company began aeronautical motor activity by building BHP's Puma engine in the effort of the Great War. (WWI)

-The “Puma”, designed and tested by BHP (Beardmore-Halford-Pullinger), was also built at that time by Galloway Engineering Co.

-It was a necessary engine at that time to counter German aircraft equipped with modern engines.

-The Puma was the closest engine that the British had at that time.

-They continued to develop it with techniques such as increasing compression, etc. proving success.

“Puma”

-The Puma had six cylinders in line, with 18.8 liters of displacement and 240 HP initially, increasing to 310 HP for the high compression model, the 1918 version.

-They were the British engines built in the greatest number at that time.

-Other engines came from this brand such as the Jaguar, Pacific, Atlantic, etc.

-Later Siddeley-Deasy merged with Armstrong-Whitworth (see), creating Armstrong-Siddeley Motors.

“Siddeley Jaguar, on display”

-Later it joined the Hawker group as Hawker-Siddeley in the year 1954.

-In 1959, it was submerged in Bristol Aero Engines and was renamed Bristol-Siddeley.

-And eventually, everything became part of Rolls-Royce.

-Before its merger with Armstrong-Whitworth, special engines were still made for bombers such as the Siddeley-Deasy “Pacific”, a V12 derived from the Puma, which used its cylinder rows (500 HP).

“Siddeley-Deasy, Tiger”

-The Tiger was another V12 that gave 600 HP. It was water cooled, and it had cylinder blocks from the Puma, but it rotated at a higher rpm. The V was at 60°.

“Two other views of the Tiger”

-We see an almost frontal view with the superimposed gear and a rear view with the distribution transmissions and the water pump with two branches that enter each block.

-Neither the Pacific nor the Tiger achieved great success.

-There were formulas for certain airplanes with double mounts. They had two Siddeley-Deasy Pumas. One as a puller and the other as a pusher. They were installed on the Bristol Braemar I.

“Double-Puma Assembly”

-For more details see also Beardmore, Armstrong-Siddeley, Galloway and BHP.