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The Coffman engine starter (also known as a "shotgun starter") was a starting system used on many piston engines in aircraft and armored vehicles of the 1930s and 1940s. It used a cordite cartridge to move a piston, which cranked the engine.
The Coffman starter was an explosive cartridge operated device, the burning gases either operating directly in the cylinders to rotate the engine or operating through a geared drive. First introduced on the Junkers Jumo 205 diesel engine in 1936 the Coffman starter was not widely used by civil operators due to the expense of the cartridges. [11]
Data from Aircraft Diesels: Chapter 3 - The Guiberson Diesel General characteristics Type: 9-cylinder air-cooled radial diesel piston engine Bore: 5.125 in (130.18 mm) Stroke: 5.5 in (139.70 mm) Displacement: 1,021 cu in (16.73 L) Length: 38.6 in (980 mm) including starter Diameter: 47.125 in (1,197.0 mm) Dry weight: 653 lb (296 kg) Designer: F. A. Thaheld Components Valvetrain: two pushrod ...
Coffman cartridge starter. First version of Merlin to use 30/70% glycol/water coolant with reinforced construction, able to use constant boost pressure of up to +12 psi (83 kPa) using 100 octane fuel. [8] First production Merlin XII, 2 September 1939. [6] [9] Merlin XX (RM 3SM) 1,280 hp (954 kW) at 3,000 rpm
A teardrop shaped blister for a Coffman cartridge starter can be seen just behind the propeller. This aircraft carries a 30-gallon "slipper" drop tank under the fuselage. In the early months of 1942, with the clear superiority of the Focke-Wulf Fw 190 over the Spitfire Mk Vb, there was much pressure to get Spitfires into production using the ...
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The first Canberra B.2 prototype, VX165. The Air Ministry specification B.3/45 had requested the production of four prototypes. On 9 January 1946, English Electric received a contract to produce four prototypes, which received the Society of British Aerospace Companies designation A.1; work commenced on the construction of these prototype aircraft in that same year, which were all built on ...
Coffman's 34-year Marine Corps career included being awarded a Purple Heart and two Bronze Stars.