I had to make some coopered doors for a project I'm working on. I found that making coopered doors was more difficult than I expected, especially in getting the radius exactly as I wanted.
To figure what angle to cut the staves at, I made a full size drawing and measured the angle from the drawing. Then I did a test door to see how that angle would come out. It turned out that the door was too curved at that angle so I had to cut everything apart and try a smaller angle.
When I was satisfied with the test door, I made the actual doors and the curvature came out pretty well - a slight bit more curved than I wanted but usable.
The doors will be veneered and the project is being made from genuine mahogany. To save some mahogany, I used poplar in the center. I put a 10mm domino in the end of the poplar and attached a piece of mahogany on each end.
Fairing the outside was no problem but getting the inside fair was a problem. I coved the staves a bit to make the fairing easier. I tried a compass plane (didn't work), curved scrapers (waaay too slow), but finally just put some very coarse sandpaper in my ROS and used that. Any suggestions for next time?
The radius of the doors is 16 inches. They will be mounted side-by-side. I thought about doing one design that would span the two doors but getting that pressed would be a challenge. I think I'll go with two designs, each centered on a door.
Right now, the doors are too large, both too wide and too long. I'll trim and fit them soon. Still a lot to do on the project.
Mike
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