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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]
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
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 ...
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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 ...
If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1252 ahead. Let's start with a few hints.