[python] Re: no weld python
- From: Kevin Bailey <ke-python@xxxxxxxxxxxxxxxxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Tue, 3 Jun 2008 08:50:23 -0700
On Tue, Jun 03, 2008 at 09:38:29AM +0200, Uipko Berghuis wrote:
> On Mon, Jun 2, 2008 at 8:47 PM, Olaf Johansson <home@xxxxxxxxxxxxxxxxx> wrote:
> >
> > Someone should mention carbon fibre and epoxi.
> >
>
> Carbon is certainly a no weld option but I think it will cost the same
> or more as welding. And it is probably also more difficult, anybody
> experience with both methods?
The only cost with composite building is the materials. There's
no expensive equipment that you may never use again. Carbon
fiber is expensive, but you could also build it out of fiber
glass which is almost a tenth the cost. Before saying that fiber
glass isn't strong, or you have to use more to get the same
strength, recall that they make airplanes out of it (which is
where my experience comes from.)
However, I would say that its easier for a beginner to make a
strong braze or weld than a strong composite joint. The trouble
is that epoxy is actually pretty bad at bonding and compression
(relative to metal). What manufacturers have to do is wrap
things like bottom brackets and steering columns with extra
layers (compared to, say, the tubes) to make them strong enough.
For all I know, carbon fiber bikes may use ribbed pieces to get
them to join better, where with welding, any off-the-shelf
smooth piece (read: recycled) is preferred.
If someone was intrigued, I'd say give it a try. The cost
of failure is pretty low.
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