I've done some more to the shooting machine including a minor modification to allow more room for a movable trigger mechanism that slides back, automatically releasing at the desired draw length. The plan is to have about 22" minimum draw, with the string and arrow hooked onto the release mechanism at that distance. The mechanism is then pulled back by handles (or rope?) and it releases at the pre-set draw length.
You can see in the pic, I've mounted a bow in it and it looks good.
I'm now working on a prototype trigger mechanism just made out of plywood to prove the geometry and concept. It should be strong enough to shoot my lighter weight bows. The"bent" (the face where the trigger sear bears) is formed by inserting a bit of hacksaw blade into a slot cut into the plywood. The nails are just for reinforcement and the excess will be cut off.
In the actual final part will be rivets through the aluminium and steel assembly.
Just realized I've made a bit of a schoolboy error! the release mechanism has to be above the grip for the bow! But that's the joy of working with wood, just glue another length along the top, saw a bit off here, bish, bash, bosh, job's a good 'un!
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