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TarJak · 01-07-09, 09:28 PM

You only need to count the number of revs for 10 secs then multiply by 6 to tell the RPM.

Start the stopwatch as you start to count. If it is too fast to count then it's really moving and you don't have much hope of catching it.

01-07-09, 09:28 PM	#6
TarJak Fleet Admiral Join Date: Jul 2006 Location: Sydney, Australia Posts: 17,052 Downloads: 150 Uploads: 8	You only need to count the number of revs for 10 secs then multiply by 6 to tell the RPM. Start the stopwatch as you start to count. If it is too fast to count then it's really moving and you don't have much hope of catching it.