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Step 3Smoke Ring
The smoke ring is an aluminum 26" bicycle rim from a mountain bike.
"Standards" being what they are, the inner diameter of the rim is 23.5" and the outer diameter is 25".
It was hard to get the 32 holes evenly spaced. It had 36 spokes originally, so the rafter holes lined up randomly with the spoke holes. I drilled small pilot holes with a center drill first. Then I rested the rim in a wooden vee block to drill the holes big with a drillpress.
I drilled the holes at a 26 degree downward angle for the slope of the roof.
I also cut an alternative roof ring from the top of a heavy plastic barrel, but this one is much nicer.
In this shot Billy removes the rafters from the roof ring while we wait in traffic out of Burningman.
"Standards" being what they are, the inner diameter of the rim is 23.5" and the outer diameter is 25".
It was hard to get the 32 holes evenly spaced. It had 36 spokes originally, so the rafter holes lined up randomly with the spoke holes. I drilled small pilot holes with a center drill first. Then I rested the rim in a wooden vee block to drill the holes big with a drillpress.
I drilled the holes at a 26 degree downward angle for the slope of the roof.
I also cut an alternative roof ring from the top of a heavy plastic barrel, but this one is much nicer.
In this shot Billy removes the rafters from the roof ring while we wait in traffic out of Burningman.
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