Re: [CR]Re: Brass vs Silver now Prestige strength

(Example: Framebuilders:Chris Pauley)

Date: Tue, 27 Sep 2005 13:21:22 -0700 (PDT)
From: "devon warner" <crabulux@yahoo.com>
Subject: Re: [CR]Re: Brass vs Silver now Prestige strength
To: classicrendezvous@bikelist.org
In-Reply-To: <000f01c5c39a$f2cc43a0$c806ad44@DBMCN251>


Do you mean Prestige, as in Tange? I think I had a bike made of this, was super light and springy, and yes, I cracked the top and down tubes just by riding it a lot over curbs, lots of big bumps, even toured on it with 23 c tires in the 3d world (lord help me.) It did take thousands of miles, but I am not a big person, so yes, I would say the bike was a bit fragile. Devon warner San Francisco

--- Jeremy Lieberman <jeremylieberman@nyc.rr.com> wrote:
> Mr. Freeman/Davidson and anyone else with Prestige
> experience,
>
> "I straightened and rode it a bit more, and it
> eventually the .7/.4 Prestige
> downtube cracked."
>
> Over the years some builders have commented to me
> about those thin .7 .4
> Prestige tubes you mentioned.
> Most agree they have a super compliant and "springy"
> ride, but the question
> that always gets different answers is,
> how durable is this Prestige tubing over the long
> haul? Some say they never
> had a problem with it, I know for instance that
> John Murphy is a huge fan, others say its prone to
> cracking more eaily than
> other types. Any thoughts/experiences on this?
> Thank You
> Jeremy Lieberman
> New York City, NY USA
>
> ----- Original Message -----
> From: <classicrendezvous-request@bikelist.org>
> To: <classicrendezvous@bikelist.org>
> Sent: Tuesday, September 27, 2005 2:55 PM
> Subject: Classicrendezvous Digest, Vol 33, Issue 105
>
>
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> >
> >
> > CR
> >
> > Today's Topics:
> >
> > 1. Re: Ed Litton's cambio corsa bike (Joe
> Starck)
> > 2. Re: More about Silver vs Brass
> > 3. Saddle disassembly & riveting redux (Amir
> Avitzur)
> > 4. "Blue Bianchi" (Jack Gabus)
> > 5. Re: More about Silver vs Brass (Kurt Sperry)
> >
> >
> >
> ----------------------------------------------------------------------
> >
> > Date: Tue, 27 Sep 2005 11:28:51 -0700 (PDT)
> > From: Joe Starck <josephbstarck@yahoo.com>
> > To: classicrendezvous@bikelist.org
> > Cc: themaaslands@comcast.net
> > Subject: Re: [CR]Ed Litton's cambio corsa bike
> > Message-ID:
> <20050927182851.14131.qmail@web34305.mail.mud.yahoo.com>
> > In-Reply-To:
> <092720051754.26413.43398759000929500000672D22007637049C0B020E049C0E0E030A08
> 9B@comcast.net>
> > Content-Type: text/plain; charset=iso-8859-1
> > MIME-Version: 1.0
> > Content-Transfer-Encoding: 8bit
> > Precedence: list
> > Message: 1
> >
> > --- themaaslands@comcast.net wrote:
> >
> > > It should perhaps be pointed out that Ed's bike
> is a
> > > cambio corsa bike and not a Paris-Roubaix model.
> > >
> > > I can give you a bit of history regarding this
> > > particular frame. The lugs, drop-outs and such
> came
> > > from what I believe was an early 1950's Aquila
> > > frame. I had bought the frame sight unseen in
> Italy
> > > and it turned out to be totally shot, so bad in
> fact
> > > that a repair was not viable. Ed decontructed
> the
> > > frame and retrieved the lugs, drop-outs and fork
> > > crown. He then used the cambio corsa dropout
> jigs
> > > that Roland Della Santa has and built himself
> the
> > > frame. This worked out very well as Ed is
> definitely
> > > taller than your average Italian from the 50's
> and
> > > would have had great difficulty to find himself
> a
> > > large enough frame otherwise. Ed still has a few
> > > more cambio corsa dropout frames in his
> workshop, so
> > > if you want a made to measure Ed Litton cambio
> corsa
> > > bike, it is possible.
> >
> > Steven,
> > Another listee posted some links to this bike, I
> > think, but they didn't work for me. Can you or
> anybody
> > post pics of the frame, build, jigging, and such?
> A
> > few years back, Grant Petersen asked me about my
> > interest in making one, I think he said he could
> get
> > the parts and jigs, but I guess I said I wouldn't
> know
> > what to charge as I wasn't familiar enough with
> the
> > design.
> > Joe Starck
> > Madison, Wisconsin
> >
> >
> >
> > ------------------------------
> >
> > Date: Tue, 27 Sep 2005 14:31:07 EDT
> > From: RDF1249@aol.com
> > To: brianbaylis@juno.com
> > Cc: classicrendezvous@bikelist.org
> > Subject: Re: [CR]More about Silver vs Brass
> > Message-ID: <213.a0df9d4.306ae9eb@aol.com>
> > Content-Type: text/plain; charset="US-ASCII"
> > MIME-Version: 1.0
> > Content-Transfer-Encoding: 7bit
> > Precedence: list
> > Message: 2
> >
> >
> >
> >
> > OK - I spoke with Bill Davidson about his
> recollections of this test and
> as
> > usual, he remembers a lot more detail than I do.
> I had most of it right
> but
> > I hate to say Brian is correct and I remembered
> wrong on one point. None
> of
> > the silver joints pulled away from the tubes in
> this particular test.
> More
> > about that in a second.
> >
> > The device we used was borrowed from Charlie
> Cunningham. Just as I said,
> it
> > held the front triangle rigidly while a lever was
> used much as a fork
> would
> > be in a front end crash, to wrinkle the front end,
> using a hydraulic jack
> as
> > the power. A strain gauge was hooked up to this
> to measure the force
> > required, which would tell you how resistant the
> frame was against an
> impact. The
> > absolute amount of force required is irrelevant
> due to the leverage
> involved,
> > only the relative differences are significant.
> Here are the results that
> > Bill remembers: With Silver, the frame wrinkled
> right near the points of
> the
> > lugs. With brass, it wrinkled about 1 cm down
> from the lugs. This
> didn't
> > change with the different tubing or lugs, just
> with silver vs brass.
> This is as
> > you might expect, since brass requires a higher
> temperature than silver
> and
> > so the heat affected zone is further out. Bill
> says this is significant
> === message truncated ===

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