Re: [CR]Curved crank sets...Why

(Example: Component Manufacturers:Campagnolo)

Date: Sun, 02 Jul 2006 08:21:55 -0500
From: "John Thompson" <JohnThompson@new.rr.com>
Organization: The Crimson Permanent Assurance
To: classicrendezvous@bikelist.org
Subject: Re: [CR]Curved crank sets...Why
References: <MONKEYFOODxq1kv33SM0000364c@monkeyfood.nt.phred.org> <001401c69cd6$5bc4db00$d6277ad5@com>
In-Reply-To: <001401c69cd6$5bc4db00$d6277ad5@com>


NIGEL LAND wrote:
> from my early engineering training I recall that curved spokes in cast
> wheels were that way to avoid casting cracks, when the molten metal cooled.
> Cast iron, in particular, has little strength in tension, and the curves
> gave just enough flexibility to, as you observe, relieve the stresses in the
> cooled casting. They also look more decorative and would appeal to Victorian
> aesthetics.

Not being an engineer or metallurgist of any type, I have to wonder if this has relevance to forged parts? Or is it simply aesthetics?

--

-John Thompson (john@os2.dhs.org)
Appleton WI USA