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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Chopped engine, reunited with original gearbox.
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<blockquote data-quote="Pushrod Twin" data-source="post: 121780" data-attributes="member: 340"><p>Yep, it's scary! Hence my reluctance to follow through with the idea. I think Vince's idea of using a thick jig plate is smart, but I would lean towards making an aluminium one for exactly the reason he recognised, it will expand at the same rate as the casings. Vince also recognised the process required, pre-heat, weld, post cool. The original Vincent case material actually welds quite well.</p><p>Then there is the decision to be made regarding post weld heat treatment. This was the part which scared me off as I was heat treating aircraft parts during the period of my career when I started work on my B cases. Heating the serviceable engine front half case to something near 500 C and biffing it in a tank of water knowing that it was going to change shape put me off. I could never be sure that the distortion could be machined out of it.</p></blockquote><p></p>
[QUOTE="Pushrod Twin, post: 121780, member: 340"] Yep, it's scary! Hence my reluctance to follow through with the idea. I think Vince's idea of using a thick jig plate is smart, but I would lean towards making an aluminium one for exactly the reason he recognised, it will expand at the same rate as the casings. Vince also recognised the process required, pre-heat, weld, post cool. The original Vincent case material actually welds quite well. Then there is the decision to be made regarding post weld heat treatment. This was the part which scared me off as I was heat treating aircraft parts during the period of my career when I started work on my B cases. Heating the serviceable engine front half case to something near 500 C and biffing it in a tank of water knowing that it was going to change shape put me off. I could never be sure that the distortion could be machined out of it. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Chopped engine, reunited with original gearbox.
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