Mk VIs were built with the Coffman cartridge starter, with a small teardrop fairing just ahead of the compressor intake.
2.
The Coffman starter was the most common brand of cartridge starters during the mid-1930s, and the name was used as a generic description.
3.
The starter is usually an air turbine type, similar to the cartridge starter, but uses the APU's bleed air instead of the burning gases of the propellant cartridge.
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