Re: [CR] Scheeren v. Weinmann balsa-filled rims.

(Example: Humor:John Pergolizzi)

From: "kevin sayles" <kevinsayles@tiscali.co.uk>
To: John <torup@sbcglobal.net>, <classicrendezvous@bikelist.org>
References: <mailman.6949.1262824106.565.classicrendezvous@bikelist.org> <74D3B1E4-2F2E-44DF-9430-23C94ED39E30@sbcglobal.net>
In-Reply-To: <74D3B1E4-2F2E-44DF-9430-23C94ED39E30@sbcglobal.net>
Date: Thu, 7 Jan 2010 07:44:41 +0000
Subject: Re: [CR] Scheeren v. Weinmann balsa-filled rims.


I got my Scheeren Record's in 1972....built by a chap who used to build Tom Simpson's wheels at one point..forget his first name but Hodgsen was his surname...his daughter was Pam Hodgsen [now Clay, mother of top UK pro Johnny]......but of course the rims could have been 'older stock'

cheers
Kevin Sayles
Bridgwater Somerset UK


----- Original Message -----
From: John
To: classicrendezvous@bikelist.org
Sent: Thursday, January 07, 2010 1:23 AM
Subject: Re: [CR] Scheeren v. Weinmann balsa-filled rims.



>I asked a manufacturing tech Professor back in school about how they might
>have done it.
> The examples I have seen used endgrain balsa, which makes sense as the
> balsa is great in compression that way.
> We concluded they were rolled closed after the balsa was inside.
> the tricks we though about were:
>
> How was the rim secured closed, we could see the pins or rivet heads on
> the glue side, the other side is hidden by a transfer.
>
> How did they keep the inside surface highly polished, no plastic film to
> protect back then. Leather rolling wheel? Or just lots of labor?
>
> We figured the work hardening of the alloy got the strength up.
>
> The tooling must have been pretty flexible, Scheeren rims were made in a
> number of diameters, from "16"" for Moultons, 20", 24" and of course
> 700c.
>
> As a Junior (schoolboy) racer, I liked them as they were when polished
> just like chrome under the night velodrome lights.
>
> As to how the Weltmeister rims got so light.. well anyone have a broken
> one?
>
> Anyone know the last year of production? I have seen them "new" as late
> as 1971, but they could have been NOS by that time.
>
> John Jorgensen
> Torrance California USA