The baby onager, first try:
(See also: Second try)
The beam is made of hardwood, about 3 mm thick. The beam should be as light as possible, especially since
the design does not use a release pouch.
|A detail of the skein,|
The washer is made from a piece of 18 mm plywood, a 32 mm thick pvc tube to hold it in place, and a 4mm nail to hold the rope.
This configuration is not very good; after a few shots, the nail first broke trough the wood of the washer, than it bended seriously. The nail is now replaced by a 7 mm steel bar.
The skein (rope) has the power to break everything in the construction.
|This problem is addressed in The baby onager, version 2|