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Vintage English Built

Old 06-12-13, 06:01 PM
  #1  
sisddwg
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Vintage English Built

I recently acquired a 1951 R. O. Harrison track frame and fork. Looking into the bottom bracket shell I cannot see the chain stays b.b. shell juncture. All that I see is a less than 10mm hole drilled into the b.b. shell. I can see the seat tube/shell juncture but not the top tube juncture with the seat tube. What is you assessment as to the building of this frame using the method that i described? On the surface the fancy lugs appear to be nicely filed down.

Thank you.
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Old 06-12-13, 07:32 PM
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unterhausen
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it sounds like it might be what is now called bilaminate construction. Hard to tell without pictures
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Old 06-12-13, 07:45 PM
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sisddwg
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Originally Posted by unterhausen View Post
it sounds like it might be what is now called bilaminate construction. Hard to tell without pictures
Oh! I never thought of that. I'll try to get some photos. Thank you.
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Old 06-12-13, 10:02 PM
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Doug Fattic 
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Bikes of that era often used sandcast bb shells that to not have open sockets into the central area of the shell. It is like the sockets sat on top of a round tube and sometimes had smaller holes between the sockets and inside of the shell. Or like was already mentioned, it could be a bi-lam construction.
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Old 06-13-13, 08:28 AM
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sisddwg
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Bilaminate?

Photos of what I am trying to describe.
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Old 06-13-13, 02:04 PM
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MichaelW
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Send pics of the bottom bracket of which you speak. Make sure they are in focus, cameras have a minimum focussing distance, and use plenty of diffuse light from a North window, not flash.
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