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1. 09:52 AM - Re: Starter ring drive ratios (Grant Corriveau)
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| Subject: | Re: Starter ring drive ratios |
--> Engines-List message posted by: Grant Corriveau <grantc@ca.inter.net>
> What does it mean for a starter ring/flywheel assembly to have a 1.91:1 drive
> or a 3.25:1 drive?
It looks like an expression of the ratio of the rpms of the two gearwheels -
one on the starter, the other on the motor (flywheel). That would mean that
the starter motor will turn 1.91 revs for each rev of the flywheel (or 3.25
revolutions in the second example). This also translates to the number of
teeth on the starter motor as a ratio of the number on the flywheel.
I imagine this is important because some engines require more mechanical
advantage so that that electric motor can push them through the compression.
OR maybe there's an ideal speed for spinning the engine during starting?
This gets beyond me but I'm sure other's will provide more indepth
responses.
fwiw
--
Grant Corriveau
C-GHTF / HDS / CAM100
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