<VV> Early drums from Z car

[Kenneth E Pepke]

I stand corrected ... absorb would have been a better word
than store.
Ken P
++++++++++++++++++++++++++++++++++

On Wed, 05 Nov 2008 12:31:23 -0800 Chris & Bill Strickland
<lechevrier at earthlink.net> writes:
> 
> >... rapidly collected in the mass of the drum or disc then 
> dissipating that
> >heat into the air over a period of  time.  Reduction of the mass 
> reduces the
> >drum or discs ability to store heat. 
> >
> 
> maybe "absorb" heat would have been a better description, followed 
> by 
> "dissipate" heat -- both cast iron and aluminum are good at it, as 
> can 
> be noted by looking at the frying pans on your stove.
> 
> Now, by my limited understanding of 'big rig' truck brakes (one 
> emergency wheel bearing job and routine service on one or two 
> tractors), 
> they would prefer to have the extra metal rather than turn a really 
> ugly 
> surface heat cracked drum, so loss of material may be one of the 
> considerations on drum turning limits, as it is on disc brakes.
> 
> Bill Strickland
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