Pneumatic speed

[Mark McLeod]

A regular gate latch is the most common I've seen used this year with a separate tiny cylinder to unlatch it.
If you do the precharge trick don't pull the cylinder all the way back when it latches. Leave a couple of inches of cylinder as precharge volume.

You can also do a variation, such as

1. using a cylinder to pull back a heavily elastic powered kicker
2. latching it back
3. returning the cylinder to it's forward position
4. opening the latch to kick
5. repeat.