Re: [CR] Now Montreal 76 'drome and left hand drive


To: mrndlmn@toad.net
Date: Sun, 16 Mar 2003 15:15:22 -0800
Subject: Re: [CR] Now Montreal 76 'drome and left hand drive
From: "Mark A. Perkins" <bicyclemark@juno.com>
cc: classicrendezvous@bikelist.org

Martin:

Well, I guess there's something to that part of his argument. Not being an engineer, I wouldn't have any idea where to start in order to make such calculations. I was just using logic as it relates to the necessity for each of the pedals to be the same distance from the center plane of the bike, or better yet the center of the rider's seat. I wasn't thinking about inertia and all of that engineering stuff.

"Bicycle Mark" Perkins Fresno Cycling Club - Historian Fresno, California, U.S.A.

On Sun, 16 Mar 2003 17:39:25 -0500 Martin Needleman <mrndlmn@toad.net> writes:
> Mark,
>
> You're correct. This _was_ one of Pino's arguments for left hand drive,
> however, so I suspect that reversing the threads on the cog and lockring
> was not all there was to it in terms of modification. His second
> argument is true without doubt but there's a question in my mind as to
> its significance. Argument two is that the chain, chainring, cog and
> lockring being now closer to the center of the track, during the race
> their weight is moved for a smaller distance than if they
> were on the right side. Remember that Pino was the worlds biggest weight
> weenie. The story is that he performed calculations for various
> distances and concluded the "virtual" weight saved by left hand drive
> could be significant over the long haul.
>
> Martin Needleman
> Annapolis, Maryland