I made this gun after I realized that I only had made one sprinkler valve gun so far, and it was a crappy one. I've made piston valves and used quick-exhaust valves, but my views on sprinkler valves were slightly influenced by the first one I made. Not good. So, I made a simple sprinkler valve gun with a 1" modded Orbit Watermaster to remedy this problem.
SPECS:
Valve: 1" pneumatically actuated Orbit Watermaster sprinkler valve
Barrel: interchangeable between a 3/4" SCH-40 barrel 30 inches long and a 1-1/2" SDR-21 barrel 2 feet long. Attached via 1" male NPT threads.
Chamber: 12" of 2" SCH-40 PVC
Fill Valve: Schrader valve from Wal-Mart
Fill Monitoring: 1-100 PSIG gauge
PICTURES:
- valve.jpg (28.5 KiB) Viewed 1787 times
- 34attached.jpg (36.24 KiB) Viewed 1228 times
- gbattached.jpg (37.24 KiB) Viewed 1228 times
- cover.jpg (21.45 KiB) Viewed 1787 times
My opinion is as follows:
A sprinkler valve makes a nice little valve for an OK launcher. It would be the kind of launcher I'd give to my friend or brother. The 3/4" barrel makes a nice *thump* when shot and'll send saboted junk into plywood at 90 PSI. The golfball barrel makes a nice *THWAP* sound when fired, but I haven't got any real performance tests for this barrel yet. I think the bottleneck from the valve to the barrel will increase accuracy somewhat, but we will see.
Please tell me what you think of this gun!
So fun yet so easy and small.
