GOBLIN manufactures a single shot paintball marker (http://www.goblinpaintball.com/product-description
). If you look on the right hand side of the page, third image down, there is a picture that shows kinda how this works. Basically the silver "round" is the CO2 storage tank AND the valve to release it. A person fills up the silver round with CO2 prior to using the marker or gun, pulls the trigger and releases enough CO2 for a single shot.
I want to use silver round idea in an R/C tank. I didn't want the big marker and CO2 tank, since it wouldn't look right and I didn't want to shot a whole lot of paintballs, just one or two.
My problem is figuring out the best way to push the valve open in a small space without having to put a big battery on it.
I like the linear actuators, but their cost can be a bit high. I saw another post on this forum for making a linear actuator out of a servo, but the servos don't seem to get enough torque without approaching a linear actuators costs.
Is there a way I'm not thinking of?
Specs on the problem -
Force to open valve : 5-8 lb/foot or 30-40 N-M
Space : 1.5" W x 1.5" H x 10"L
Thanks in advance!