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 Firing interval
| n (number of cylinders) |  (four stroke) |
(two stroke) |
| One-cylinder | 720° | 360° |
| Two-cylinder | 360° | 180° |
| Three-cylinder | 240° | 120° |
| Four-cylinder | 180° | 90° |
| Five-cylinder | 144° | |
| Six-cylinder | 120° | |
| Eight-cylinder | 90° | |
| Ten-cylinder | 72° | |
| Twelve-cylinder | 60° | |
| Sixteen-cylinder | 45° | |
The ignition intervall is the angle that the crankshaft turns from one cylinder-ignition to the next.
| 720° |
 =
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| n |
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Important
There are engines which have a more or less uneven ignition angle, e.g., V10-cylinder engines in the previous Formula-1 rule book and in the field of motorcycles with "two-stroke"-crankshafts (KTM ).
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Translator: Don Leslie -
Email: lesdon@t-online.de | |
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