[CR]Re: Classicrendezvous digest, Vol 1 #1916 - 8 msgs

(Example: Racing:Roger de Vlaeminck)

From: "Dennis Young" <mail@woodworkingboy.com>
To: <classicrendezvous@bikelist.org>
In-Reply-To: <20021203200001.11200.60974.Mailman@phred.org>
Subject: [CR]Re: Classicrendezvous digest, Vol 1 #1916 - 8 msgs
Date: Tue, 03 Dec 2002 16:35:38 -0800

In search of the 'perfect adhesive', I have tried many over the years. Epoxies seem to have gained wide use for their strength and 'apparent' bonding longevity. Some even retain slight elasticity after hardening, but I suspect this eventually disappears. As Brian mentions, I think the gap is a critical element. Some adhesives perform better with a discernable gap. A re-design of the mateing surface between tube and lug would probably be advantageous, one that gives irregular and greater surface area. ('glueing fins', a new cycling term, and coined by me!)

Dennis Young Hotaka, too cold for the glue to dry, Japan


> Sam,
>
> You know, I used to think about doing that back in the early 70's. At
> the time adhesive technology required that the gap between tube and lug
> be quite consistant. I never got past that particular requirement before
> I got distracted and ended not thinking about doing that until now.
> Provide the GOO and I'll stick an "experimental" frame together. I think
> we'll use a standard brazed fork until I see how tough the frame is. The
> only problem I see is that if a joint fails it is likely to be a
> catastrosphic failier. That might be a bit "dangerous". Gentle testing
> at first, not to exceed 80 mph on the downhills ;-)!
>
> I'm game. Lets do it. I think brazeing the dropouts at first also.
>
> Brian Baylis
> La Mesa, CA
> I've brazed my fingers together several times; this could be even easier
> to stick the fingers together.
>
>
>>
>> I have been reading the discussion of if a lugged frame is still OK for pro
>> level racing. I came up with some thoughts. The newer tig welded and
>> aluminum frames are quicker and easier to assemble than a lugged frame
>> (true)? I have a question for the frame builders out there. 3M and some
>> other manufacturers are making a metal to metal adhesive for auto body
>> repair. You can use on a structural member on a unibody car such as a
>> quarter panel, a roof, a door skin and it is as strong as a weld. These
>> parts take quite a load and are stressed as you drive. Could we put bonding
>> adhesive between the tubes and the lugs making it quick, inexpensive and
>> idiot proof (compared to welding) no heat would mean stronger tubes -- who
>> wants to give it a try? Sam DiBartolomeo Riverside, CA