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Are those reinforcements actually reinforcing anything?
The joint isn't going to be any stronger is it? Just the tube beneath it for a small area
PhilDAS-
Yeah they spread the load from the end of the tube over a larger area. The reinforcement piece may not be much bigger than the diameter of the tube but it’s huge amount more area of contact than the end of the tube would be.
I think if you filleted straight to the seattube you’d be putting a lot of heat into a pretty thin tube and that’d most likely result in distortion of the seattube. This way the hot fillet is done to a heavier piece of metal and then I use lower temp silver brazing to join that to the seattube. If the reinforcement piece gets distorted during the fillet braze it doesn’t matter as much because the filler material can take up the discrepancy.
M_V
Today is a good day.
New headset arrived and it does not just drop into the frame so it was just that the other one was rubbish (guess that’s what you get when you buy a £4 headset off Santafixie).
Also got started on the wishbone rear end. Reinforcement piece shaped and centre tube mitred.
Think I’m going to use one piece of tube that pierces through the centre tube to join the stays.