I believe that the later cylinder is smaller. Now while this is a bit
counter-intuitive it is none the less important.
In an hydraulic system a smaller diameter cylinder will exert a higher
pressure for the same (for lack of a better term) volume of fluid
moved. Thereby making a smaller cylinder capable of exerting a greater
pressure on the brake drums, per Boyles Law (I think). I do not recall
the exact math tho. Nor am I sure this is the correct "Law". But I do
recall the principal when working for Caterpillar on hydraulic
cylinders and diesel fuel injectors.
From http://dbhs.wvusd.k12.ca.us/GasLaw/Gas-Boyle.html:
> Discovered by Robert Boyle in 1662. On the continent of Europe, this
> law is attributed to Edme Mariotte, therefore those counties tend to
> call this law by his name. Mariotte, however, did not publish his work
> until 1676.
>
> This link takes you to a discussion of the experiment Boyle performed,
> the data he gathered and his picture.
>
> His law gives the relationship between pressure and volume if
> temperature and amount are held constant.
>
> If the volume of a container is increased, the pressure decreases.
>
> If the volume of a container is decreased, the pressure increases.
Larry
On Oct 13, 2003, at 11:06 AM, Robert E. Shlafer wrote:
> Larry M. writes, in part...
>
> "I also seem to recall that if the spring rates are higher, then weight
> transfer to
> the front under braking is lessened. To
> what extent I don't recall".
>
> Which falls right in with Bob VK's remark
> on higher capacity rear wheel cylinders
> to the extent the factory engineers thought
> higher capacity rear braking was required
> on the heavier 1500.
>
>
>
>
> Cap'n. Bob
> '60 :{)
>
--
Larry B. Macy, Ph.D.
macy@bbl.med.upenn.edu
System Administrator/Manager
Neuropsychiatry Section
Department of Psychiatry
University of Pennsylvania
3400 Spruce St. - 1015 Gates
Philadelphia, PA 19104
I have great faith in fools - my friends call it self-confidence.
- Edgar Allen Poe
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