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Unread 24-05-2008, 13:32
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Aren_Hill Aren_Hill is offline
Build Nifty Things
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Re: pic: 1625's shooter ready to fire

okay, heres how this thing works. In this picture the shooter is currently ready to fire.
there are two linkages, one hinged to the puncher itself and one hinged to the large sprocket, then connected together. Currently the forward force of the surgical tubing is holding the linkage quite tightly against a catch on the face of the sprocket. In order to fire the large sprocket rotates, moving the hinge point of the rear linkage over center and therefore there is no catch to stop the puncher from flying forward, hence it flies forward.

this leaves the shooter in "unloaded position but both linkages fully outstretched.
The large sprocket then rotates the same direction it did to fire, drawing back the rear hinge point hence partially loading the shooter. Then once the hinge point 180deg from where it was the catch grabs the linkage and it does another 170deg rotation, to be back ready to fire.

i hope thats not to confusing, i managed to explain it to people in person but alot of talking with the hands was involved
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1625->3928->148->1296->971 oh dear
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