WSBK » Checa: Another incredible day!

The Spaniard makes it five wins from the last six races to be held at Imola as he moves ahead of Max Biaggi in the standings.

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MM - Unregistered

April 02, 2012 6:34 PM

While smaller pistons and valves can be made to move faster, even with the same rev limit you could get more power from a 4 cylinder engine 1000cc than a twin. Power depends on the ability to cram as much air into the engine as possible and the area to volume ratio is the determining factor. If you double the size of a 1cm cube, you increase area from to 24 while the volume goes from 1 cubic cm to 8. So the surface to volume ratio halves from 6/1 to 3/1. You'd have to go really small before the friction losses of restricted inlet and exhaust overcame the volumetric advantage, hence the 6 cylinder 250s of the past, but the sheer cost and complexity of a 36 cylinder 125 would be prohibitive too.

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