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RPM Reading - 2 vs 3 blade

Old 07-12-2010, 08:53 PM
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T-ster
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Default RPM Reading - 2 vs 3 blade

I have an old tach and the labels have long since fallen off. When I'm checking the rpm, I'm not sure if I have it in the 2 or 3 blade mode (it has a switch than slides left and right). When I switch between the two settings, should the higher of the two numbers be in 2 or 3 blade mode?

Thanks.
Old 07-12-2010, 10:10 PM
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krayzc-RCU
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Default RE: RPM Reading - 2 vs 3 blade

2 is higher
Old 07-28-2010, 09:34 PM
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RVman
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Default RE: RPM Reading - 2 vs 3 blade

Point the tach at fluorescent light. It should read 2400RPM for 3 blade and 3600 for the 2 blade setting.

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