[Farmall] Tachometer

[soffiler at myeastern.com]

I don't know but strongly suspect it reads RPM directly.  If
it just counted the number of times the prop blade passed,
you'd see nothing but an ever-increasing number on the
readout as it passed by over and over and over.  That would
be useless, unless you also had a stopwatch and froze the
count reading at some particular point, then did the math. 
I can't believe anyone would find something like that even
remotely useful.  Therefore my hunch it reads RPM directly.

Steve O.


From: "E. John Puckett" <ejpuckett at centurytel.net>
To: Farmall/IHC mailing list
<farmall at lists.antique-tractor.com>
Subject: Re: [Farmall] Tachometer
Date: Mon, 20 Dec 2004 07:47:16 -0600

----- Original Message Follows -----
> I've been looking for something similar, but everything
> I've found ran in the  $75 to $150 range.  Does it give a
> reading of the number of times the prop blade  passes, or
> is their a scale that changes the counts to rpm.  might
> have to do a  little calculation to get rpm from a tractor
> engine.
> 
> Robert L. Holtzer wrote:
> >  From time to time there has been discussion of setting
> > engine idle,  etc.  Recently in a model airplane shop I
> > saw a $25 tachometer that had  an RPM range of 0 to
> > 30,000.  It detected RPM from the propeller -- 
> apparently something akin to a strobe.  It would probably
> > work off a  painted mark on a crank pulley.
> > 
> > Anyone have any experience with this type of equipment?
> > 
> > Bob Holtzer