A bunmawashi is a traditional Japanese beam compass. It's a pretty clever design (not original to me).

The beam is 25"/635mm

I didn't have a piece of wood or the space to really scribe out a full size circle.

This tool is part of the Wood by Wright tool build off 2017. It is also part of Mitch Peacock's 2017 Tool Build off.
Wood by Wright:
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Mitch Peacock:
[ Ссылка ]

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