Re: [CR]Was; overlapping wheels,,,Now; University degree in frame (mis)design.

(Example: Production Builders:LeJeune)

From: "Charles T. Young" <youngc@ptd.net>
To: <classicrendezvous@bikelist.org>
References: <8C7E527C443343E-A5C-282D@MBLK-M10.sysops.aol.com>
Subject: Re: [CR]Was; overlapping wheels,,,Now; University degree in frame (mis)design.
Date: Wed, 11 Jan 2006 22:29:05 -0500
reply-type=response

There is an eBay seller that cited his UBI Advanced Bike Technician certification while recently selling a partial bike "as is" with accident damaged fork that he sort of straightened out and wrinkling in the vicinity of the headtube. He seemed to indicate that it may be ride worthy.

Wonder if he missed an ethics module in the program.

Charlie "caveat emptor" Young
Honey Brook, PA


----- Original Message -----
From: oroboyz@aol.com
To: rstankus@mindspring.com
Sent: Wednesday, January 11, 2006 7:39 PM
Subject: Re: [CR]Was; overlapping wheels,,,Now; University degree in frame


(mis)design.


> << Certified Bicycle Technician >>
>
> Yes indeed, CER-TI-FIED... I would like to sit on the Board of standards,
> wonder how often they meet?
>
> Dale Brown
> Greensboro, NC USA
>
>
>
> -----Original Message-----
> From: Roman Stankus <rstankus@mindspring.com>
> To: oroboyz@aol.com; classicrendezvous@bikelist.org
> Sent: Wed, 11 Jan 2006 07:49:00 -0500
> Subject: RE: [CR]Was; overlapping wheels,,,Now; University degree in frame
> (mis)design.
>
> Perhaps Norris has heard of the United Bicycle Institute in Ashland,
> Oregon
> where one can take framebuilding courses in a variety of techniques as
> well
> as bike technology. Students receive a Certificate of Completion and can
> get
> a Certified Bicycle Technician certificate upon completion of coursework
> and
> testing.
>
> I only know about it from the website.
>
> For more info - See http://www.bikeschool.com
>
> Roman Stankus
> Atlanta, Ga.
>
> -----Original Message-----
> From: classicrendezvous-bounces@bikelist.org
> [mailto:classicrendezvous-bounces@bikelist.org] On Behalf Of
> oroboyz@aol.com
> Sent: Tuesday, January 10, 2006 10:01 PM
> To: classicrendezvous@bikelist.org
> Subject: [CR]Was; overlapping wheels,,,Now;University degree in frame
> (mis)design.
>
> << Some one once told me that it is possible to obtain a degree in
> cycle-frame design at some college or university in the States. Is that
> really the case?>>
>
> No.. some engineering & Design students have used bicycle design as
> part of their qualifying projects but no degree as such.
>
>
> Dale Brown
> Greensboro, NC USA
>
>
> -----Original Message-----
> From: Norris Lockley <norris@norrislockley.wanadoo.co.uk>
> To: classicrendezvous@bikelist.org
> Sent: Wed, 11 Jan 2006 01:26:02 -0000
> Subject: [CR]Pedal x front/wheeel overlap
>
> This topic really is the stuff of a cycling club meet, during the wet
> off-season, around a fire in the local public - house!
>
>>From what I know of quite a few French frame-builders, constructeurs,
> and bike manufacturers, this overlap factor is one of the most critical
> ones that they consider when
> designing a bike frame. The maxim that they adopt is to avoid overlap
> at
> all costs, although I admit that on some massed produced bikes, given
> the restrictive nature of certain lug angles, the cost of labour in
> manipulating them to more suitable angles, some bikes do come out of
> the
> factory with built-in overlap...but always as little as possible.. The
> term Chasse Avant ie the front end centre length is all important.
> However some manufacturers managed to overcome the restrictive nature
> of
> lugs by adopting bronze-welded construction techniques, thereby
> allowing
> themselves to vary the head and seat angles far more easily.
>
> I was involved with the TVT company around the time when they started
> to
> produce TVTs instead of just supplying tubes to LOOK, and was impressed
> by the measures to which the designers went to produce frames with no
> overlap...these frames ...are essentially racing machines, remember,
> and we cannot expect a rider, when descending the Col de Galibier. to
> have to wonder where he should place his pedals in relation to the
> front
> wheel...he clearly has other more important considerations on his
> mind...
>
> This was the philosophy adopted by the TVT team, as expressed to me by
> M. Guigneaud, the frame designer who is still, I believe, designing for
> the TIME company.Such was the company's preoccupation with this aspect
> of the frame's design..and the rider's safety, that when they came to
> design the two frames at the small end of the range, the 47 and the
> 48cms, and it became abundantly obvious that it wasn't possible to
> build
> frames of those sizes, with suitably short top-tubes, both 50cms C-C,
> and also avoid overlap..that the designers took the radical decision to
> use a 26" wheel at the front instead of a 700c. This decision also
> produced a frame with a longer head-tube..and a much better balanced
> handling bike altogether The front end C-to-C was 560mms.Nowhere in the
> TVT range is there a front end measurement less than 585mms, and that
> appears on the 49cms frame....and TVTs are reckoned to be something of
> a
> bench-mark in handling terms for a road-racing bike. All TVT frames
> were
> designed using combinations of just three angles. All head angles were
> 73, all seat angles up to the 54cms frame were 74.5, and over that were
> 73.5. The company also offered a custom service. I once ordered a 51cms
> frame with a 51 cms top-tube. After various attempts to design the
> frame, the company declined the order claiming that without shallowing
> off the head angle to an unacceptable angle or increasing the seat
> angle
> to a far too steep one in order to retain sufficient clearance at the
> front end it would not be possible to produce a frame to the dimensions
> asked for.
>
> However I can't have been the only frame builder on the List who has
> been approached by customers seeking winter bikes built to the same
> design as their best road-racing bike. Almost every time that I
> undertook this task on small frames, particularly Franch and Italian
> ones,I would make certain desin assumptions but would end upI being
> amazed at the mixture of angles chosen by these continental builders. I
> recall 49 and 50cms frames with 75/76 seat angles, merged with 70/71
> head angles...but very short top-tubes...but no overlap. I believe,
> however that Merckx used to build a stock 52cm frame with a 75 head
> angle..but there again he always used a long raked fork...but managed
> the mix without the front-end juddering or wobbling at speed.
>
> Van Impe, the pint-sized Belgian ace climber, used a frame with a
> 50.5cms seat tube, and a 52.5 cms top-tube, the front-end clearance
> being 585mms...60mms trail..and no overlap. Zootemelk rode a 54.5cms
> square frame with 595mm front end and 60mm trial..and no
> overlap..Merckx
> rode a 59cms with 57cms top-tube, 600mm front end and..60 trail..and no
> overlap.
>
> Some one once told me that it is possible to obtain a degree in
> cycle-frame design at some college or university in the States. Is that
> really the case?
>
> Norris Lockley..Settle UK
>
> _______________________________________________
>
>
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>
>
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