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21st July 2019, 09:30 PM #1Most Valued Member
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- Aug 2015
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Notching RHS to a cylinder- how to calculate angles
I'm building a BBQ, the big, obnoxious, American kind- AKA an Offset smoker.
I'm using a cylinder of approx 530mm dia. I don't own a spring caliper, so 530mm is as best as I could get with the tools I have.
The frame is a truncated isosceles triangle which intersects the cylinder at a point (a chord of the circle).
Is there an easier (maybe mathematical) way to calculate rough angles to allow a bevel to be cut then scalloped , say, for an edge of the RHS to meet a given chord of said circle?
I reverted to the old cardboard cutout, and transposed the shape after laying out the design on my welding table with chalk, compass and ruler. Worked, but a lot of messing about.
20190721_154233.jpg
Pic of the project. Disregard the plumb line which is clearly not plumb. Also disregard the dirt floor fab area I'm working in. It's a bit too big for inside my little shed.
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- 20190721_154233.jpg (240.5 KB)
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