Having launched boats, that would be too slow, as the spool has to unwind, slowing down the release. They'd need to be a way to quickly release it from the winder/spool to get the speed and kinetic energy to the bolt.BlownV8 wrote: It would be the release already on the winch.
As others have pointed out, it's a movie, and it just needed to look like it would work, which it does.
It' probably good the replica isn't the same, as it could be quite deadly!
Now if anyone has a schematic of the wrist crossbow....