Re: [ATM] How to Reduce Bearing Friction

[hermit <hermit@outofoptions.org>]

I think there was some criticism when this came out about whether or not
the modeling really was applicable to what we do.  Is this the one with
inclined planes?  A simple scale will let you measure forces that you
need to push or pull your own dob around.

Ken

Mark Holm wrote:

>Nils Olof Carlin wrote:
>
>  
>
>>But it demonstrates the complexity of the matter - the 
>>real-life friction of Teflon against laminate just isn't well described by 
>>the common, simplified model of a constant friction coefficient.
>>    
>>
>
>Check out
>
>Better Dobsonian Bearings
>Martin Lewis; Sky & Telescope (Archives); Oct 2003; 122
>
>for an investigation of friction vs. velocity for various Dob bearing
>materials:  Real experimental data, not just textbook theory.
>
>or
>
>http://pqasb.pqarchiver.com/skyandtelescope/access/886745961.html?dids=886745961:886745961&FMT=PAGE&FMTS=CITE:PAGE&date=Oct+2003&author=Martin+Lewis&desc=Better+Dobsonian+Bearings
>
>if you are willing to pay S&T a few bucks instead of having to rummage
>through your piles of magazines to find that issue.
>
>Mark Holm
>mdholm@telerama.com
>
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>  
>

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