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22-06.-2008, 08:58 AM
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#31 |
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Guest
Posts: n/a
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Re: replacing center pull brakes with direct pull ones ?
landotter wrote:
> On Jun 21, 11:29 am, JG <j...@cox.net> wrote: >> Gentlemen, >> the change in mechanical advantage of a cantilever brake (It's not >> necessarily a reduction) between the point where the pads first touch >> the rim and full pad squishing, cable stretching, tube twisting, >> caliper bending glory is pretty inconseqential. Actually figuring out >> what it is, is difficult. >> > > This is a slide rule measuring contest...you in? I'm in. My K+E is about 265mm long! -- Andrew Muzi <www.yellowjersey.org/> Open every day since 1 April, 1971 ** Posted from http://www.teranews.com ** |
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24-06.-2008, 12:59 AM
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#32 |
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Guest
Posts: n/a
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Re: replacing center pull brakes with direct pull ones ?
A Muzi wrote:
> landotter wrote: >> On Jun 21, 11:29 am, JG <j...@cox.net> wrote: >>> Gentlemen, >>> the change in mechanical advantage of a cantilever brake (It's not >>> necessarily a reduction) between the point where the pads first touch >>> the rim and full pad squishing, cable stretching, tube twisting, >>> caliper bending glory is pretty inconseqential. Actually figuring out >>> what it is, is difficult. >>> >> >> This is a slide rule measuring contest...you in? > > I'm in. My K+E is about 265mm long! We have an old classroom demonstrator slide rule at the office, it's about six feet long. Do I win? Mark J. |
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24-06.-2008, 01:07 AM
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#33 |
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Guest
Posts: n/a
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Re: replacing center pull brakes with direct pull ones ?
On Jun 23, 10:59*am, Mark <mandmljNOS...@NOSPAM.comcast.net> wrote:
> A Muzi wrote: > > landotter wrote: > >> On Jun 21, 11:29 am, JG <j...@cox.net> wrote: > >>> Gentlemen, > >>> the change in mechanical advantage of a cantilever brake (It's not > >>> necessarily a reduction) between the point where the pads first touch > >>> the rim and full pad squishing, cable stretching, tube twisting, > >>> caliper bending glory is pretty inconseqential. *Actually figuring out > >>> what it is, is difficult. > > >> This is a slide rule measuring contest...you in? > > > I'm in. *My K+E is about 265mm long! > > We have an old classroom demonstrator slide rule at the office, it's > about six feet long. *Do I win? You don't get sand kicked in your face at the beach, that's for sure! |
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24-06.-2008, 09:11 AM
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#34 |
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Guest
Posts: n/a
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Re: replacing center pull brakes with direct pull ones ?
>>> JG <j...@cox.net> wrote:
>>>> the change in mechanical advantage of a cantilever brake (It's not >>>> necessarily a reduction) between the point where the pads first touch >>>> the rim and full pad squishing, cable stretching, tube twisting, >>>> caliper bending glory is pretty inconseqential. Actually figuring out >>>> what it is, is difficult. >> landotter wrote: >>> This is a slide rule measuring contest...you in? > A Muzi wrote: >> I'm in. My K+E is about 265mm long! Mark wrote: > We have an old classroom demonstrator slide rule at the office, it's > about six feet long. Do I win? You win. The nice thing about a slide rule is that it's always there - no one ever borrows it. No batteries is the bonus! -- Andrew Muzi <www.yellowjersey.org/> Open every day since 1 April, 1971 ** Posted from http://www.teranews.com ** |
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24-06.-2008, 06:31 PM
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#35 |
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Guest
Posts: n/a
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Re: replacing center pull brakes with direct pull ones ?
In article <9838b$485d9542$4431@news.teranews.com>,
A Muzi <am@yellowjersey.org> wrote: > landotter wrote: > > On Jun 21, 11:29 am, JG <j...@cox.net> wrote: > >> Gentlemen, > >> the change in mechanical advantage of a cantilever brake (It's not > >> necessarily a reduction) between the point where the pads first touch > >> the rim and full pad squishing, cable stretching, tube twisting, > >> caliper bending glory is pretty inconseqential. Actually figuring out > >> what it is, is difficult. > >> > > > > This is a slide rule measuring contest...you in? > > I'm in. My K+E is about 265mm long! This one is nominally 10 inch, and measures 9.8 inch = 248.9 mm. <http://foraker.research.att.com/~davek/slide/kne/decilon.html> The text says bad things because the author looks at it as a collector and he is off the mark anyway because it sells for little more dollars now than it did new. Here are close up pictures. <http://coleccion.reglasdecalculo.com/k+e/681100.html> The device itself is a treat to use, and it remains the best tool to list and compare gear ratios. The advanced scales solve a^x = b for x, given a and b. Not pictured are the ticks for converting between radians and degrees, for finding sin(x minutes), and finding sin(x seconds). -- Michael Press |
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