PPRuNe Forums - View Single Post - Pratt & Whitney R-1830 Twin Wasp radial piston firing order
Old 18th Nov 2008, 15:32
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Aerials
 
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Some questions from an Avionic bloke

Please indulge my passing interest in this thread, perhaps my questions are relevant and will help someone else.

Firstly. Which is designated the Number One cylinder? I would hazard a guess that it is the one at 12 o'clock, but are there any engines that don't have one in this position? How is No 1 ascertained in that case?

Secondly. In which direction is the crankshaft viewed for the purposes of finding the second and subsequent cylinders?

Best regards, Aerials
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