Quote Originally Posted by hemmjo View Post
Looks like the hammer drops when the "hook" pulls away when the chain rolls back over the top sprocket.
I suspected that, but that limits you to only one hook per chain length..

The mechanism I have yet to figure out is the one the Drill pullstarter works on (rotary motion from drill causes a reciprocating motion) - Every model I come up with the test it seems "nearly right", but not quite...