How to make a winch release freely?

[joshgilmour]

We're a rookie team and are planning to use a winch for the purpose of pulling back our launching arm. We've little experience with all this, so we're having some issues trying to figure out how to make it so that when we finally want to fire, the winch can turn freely without being hindered by the motor that pulled the arm back. We plan on using a high torque motor that turns slowly, though I don't recall the name. It came with our kit.

I've read some posts about getting a gearbox to shift to neutral, among other such ideas, but have no idea if any of them would really work. Could anyone help me? If so, thank you so much!