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Subject: Prop-pitch
From: (Stan Griffiths)
Date: Fri, 17 Jan 1997 02:28:44 -0800 (PST)
>I recently obtained a used prop-pitch motor. I believe it to be a
>"small" prop-pitch based on the attached metal tag which states the
>gear reduction to be 9576:1
>I've partially disassembled it and my question is how to determine
>if this prop-pitch has the dreaded "modification" that changes the
>rotation speed at the expense of the units braking torque?? I'm
>assuming this to be a change of some type to the gear mechanism. 
>73 de Phil NA4M

I'd put about 10 volts AC on it and see how long it takes to make one
revolution.  If it has been modified, it will turn about 1 rpm with 10 volts
AC on it.  If it is not modified, it will take about 35 volts AC to make it
go 1 rpm.


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