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From: skip@ubvax.UUCP (Skip Addison Jr)
Newsgroups: net.bicycle
Subject: Re: Stationary Trainers, Rollers, Winter
Message-ID: <371@ubvax.UUCP>
Date: Wed, 27-Nov-85 20:57:22 EST
Article-I.D.: ubvax.371
Posted: Wed Nov 27 20:57:22 1985
Date-Received: Sat, 30-Nov-85 06:46:31 EST
References: <1327@sphinx.UChicago.UUCP> <319@mmm.UUCP>
Reply-To: skip@ubvax.UUCP (Skip Addison)
Organization: Ungermann-Bass, Inc., Santa Clara, Ca.
Lines: 25

In article <319@mmm.UUCP> schley@mmm.UUCP (Steve Schley) writes:
> ...
>One way to do this is to hook a motor/generator up to the rear wheel,
>through a roller contact or something.  Let the computer (anything but
>a PC!  Oh, sorry, got off the subject there...) monitor speed through
>crank and wheel sensors, and dynamically adjust an electrical load to
>simulate wind resistance, acceleration inertia, hills, et cetera.  One
>could even simulate deceleration inertia by putting energy _into_ the
>motor.
>
>Another approach would be to use frictional loading, controlling some
>caliper brakes with a stepper motor or some such affair.  This would be
>simpler, but not as flexible.
>-- 
>	Steve Schley
>
>	ihnp4!mmm!schley

Both acceleration and deceleration inertia would best be handled by 
some mass, like a fly-wheel.  Save a lot on the cost of the generator.

Leave it to a physicist ....

-- Skip Addison
   amd!ubvax!skip