Re:
These frames were normally brazed using Johnson & Matthey easiflo 60 / 40 silver which had a cadmium content. This one looks to me to be joined at the bottom point with a fillet joint, not possible with the silver. Rotrax could have used a bronze weld, so this fits with the description. The bronze weld could be stronger, but a major weak point is about half way down the one inch downtube.
The Silverlight was extremely flexible to ride, with the bottom bracket swinging excessively. All I have left now is a couple of Dormer long 1/4 inch drills used to drill through for the 1/4 inch tubes that go through all the horizontal joints where you can see a hole, and half a tin of flux which still works.
This was really an ego trip for Les, who had zero engineering or mechanical ability, but was the class salesman.
Keith
These frames were normally brazed using Johnson & Matthey easiflo 60 / 40 silver which had a cadmium content. This one looks to me to be joined at the bottom point with a fillet joint, not possible with the silver. Rotrax could have used a bronze weld, so this fits with the description. The bronze weld could be stronger, but a major weak point is about half way down the one inch downtube.
The Silverlight was extremely flexible to ride, with the bottom bracket swinging excessively. All I have left now is a couple of Dormer long 1/4 inch drills used to drill through for the 1/4 inch tubes that go through all the horizontal joints where you can see a hole, and half a tin of flux which still works.
This was really an ego trip for Les, who had zero engineering or mechanical ability, but was the class salesman.
Keith