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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Early Rapide Research: 1947
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<blockquote data-quote="Oldhaven" data-source="post: 56402" data-attributes="member: 2879"><p><strong>Early B UFM construction</strong></p><p></p><p>More B Rapide trivia for Craig, I think. I have a Series B UFM from early 1948 and the reinforcing strips at the front of the tank where the bolts pass through for the head stock is made up of 4 pieces of steel strap (two each side and bent over the top) with very crude welding. I have pictures of another one from mid 1948 that has similar construction. Someone recently told me that the straps on a later 1948 UFM that they have are made from two pieces, one to each side. and the welding is not as crudely done. All three have the type A headstock with fork and rounded section. I see from the photos of the Brillus racer on the forum that it has only the two pieces for reinforcement, and I assume all later UFM's up to Series D are similar. So somewhere in later 1948 the UFM construction changed just a bit to use stamped or flame cut shaped reinforcing straps and someone learned how to weld better or a newer arc welder was purchased.</p><p></p><p>Ron </p><p></p><p>[ATTACH=full]3147[/ATTACH]</p></blockquote><p></p>
[QUOTE="Oldhaven, post: 56402, member: 2879"] [B]Early B UFM construction[/B] More B Rapide trivia for Craig, I think. I have a Series B UFM from early 1948 and the reinforcing strips at the front of the tank where the bolts pass through for the head stock is made up of 4 pieces of steel strap (two each side and bent over the top) with very crude welding. I have pictures of another one from mid 1948 that has similar construction. Someone recently told me that the straps on a later 1948 UFM that they have are made from two pieces, one to each side. and the welding is not as crudely done. All three have the type A headstock with fork and rounded section. I see from the photos of the Brillus racer on the forum that it has only the two pieces for reinforcement, and I assume all later UFM's up to Series D are similar. So somewhere in later 1948 the UFM construction changed just a bit to use stamped or flame cut shaped reinforcing straps and someone learned how to weld better or a newer arc welder was purchased. Ron [ATTACH=full]3147[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Early Rapide Research: 1947
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