[Farmall] Tachometer

[Jim Rohr]

Let's see how many are paying attention///

Sorry for the errrrrrrrrrrrrr

Jim 

-----Original Message-----
From: Jim Rohr [mailto:jimships at yahoo.com] 
Sent: Monday, December 20, 2004 4:31 PM
To: 'Farmall/IHC mailing list'
Subject: RE: [Farmall] Tachometer

Hi,

I have used them all. I like reed tachs. They are simple, reliable and work
every time as long as you do not need to know the RPM to the last digit.
There is two types...in the can types and variable stick slide types. I use
the stick slide types because I can read from 10 RPM to 10,000 RPM on a
gauge set that would fit in my shit pocket. About 30 bucks total.

The strobe types are cool as long as you can mark the item. So is infrared.
They are no touch and do not need any markers. Expensive...$200 used/

Something to consider. 

Jim Rohr

-----Original Message-----
From: farmall-bounces at lists.antique-tractor.com
[mailto:farmall-bounces at lists.antique-tractor.com] On Behalf Of E. John
Puckett
Sent: Monday, December 20, 2004 12:38 PM
To: Farmall/IHC mailing list
Subject: Re: [Farmall] Tachometer

I don't think I made my self clear.  I didn't mean total number of times it
saw the blades pass, rather the frequency of the passage.  If it did that
when using a 3 bladed prop you would have to divide the readout by 3.

soffiler at myeastern.com wrote:

> 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
> 
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> 
> 

--
John
another one of them
*.?-!.* cub owners
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