Old 08-08-18 | 03:17 PM
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gugie
Bike Butcher of Portland
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Joined: Jul 2014
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From: Portland, OR

Bikes: It's complicated.

Bilaminate frame construction - "Alex Singer" style?

I can understand the process to make it this way:




But am trying to figure out the order of fabrication in this method:




At first I figured one would just brass braze the "lug", then silver the tubes in, then I realized there would be no way to get any decent penetration into the lug. So then I figured silver in the lugs, mitered to match the TT and DT, then fillet braze with brass. But brass temps would melt the silver. So now I'm thinking you brass braze the lug onto the TT and DT, either pre-mitered, or mitered together with the tubes, then fillet braze the sub-assembly onto the head tube.

Anyone try this before?
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