Thanks for all the positive responses so far. I will post updates to the build and attachments here. I came up with the safety after negligently discharging a net while filling the pressure chamber. It is so easy to make, every responsible net gun owner should have one. I developed the tennis ball attachment while working on an older net gun design that had a 2" net holder, it is a lot of fun for the $3 it costs to make.
Mechanical Trigger Safety
A very simple mechanical safety that will prevent the net gun from firing in the event the trigger is unintentionally actuated.
Small rubber band
- Cut a short length of 1/2" pipe, probably between 1/4" and 3/8", it will depend on the specifics of the blow gun. It needs to fit under the blow gun handle and be thick enough to prevent the handle from depressing the valve underneath. You made need to cut a wedge out of one side of the ring to allow it to slip under the handle.
- Loop rubber band around one end of ring, and through itself. Take the free loop of the rubber band and slide onto the body of the blow gun valve.
- To put ON SAFE, slide ring around brass valve underneath lever Fig 1. To take OFF SAFE, slide ring down and out of the way of valve and lever Fig 2.
Tennis Ball Launcher
The inside diameter of a 2" PVC coupler fits a tennis ball perfectly. If you own a ball chasing canine, this will forever associate the bang of compressed air with the joy of the chase.
1 2" coupler
1 2" to 1" reducing bushing
2" length of 1" PVC pipe (scrap from pressure chamber assembly)
At least one tennis ball
PVC primer and cement
- Fig 3 is a view of all the components needed for this attachment.
- Glue the bushing into the coupler.
- Glue the 1" pipe into the slip end of the of the 1" MPT adapter.
- Glue the exposed 1" pipe from the MPT adapter into the bushing. Let set for 24 hours.
- Unscrew and remove the net attachment, and thread on the tennis ball attachment. With tennis ball on the ground push the launcher attachment over the tennis ball until it is firmly seated Fig 4.
- Pressurize and fire. Repeat as necessary. If you have a slobbery dog Fig 5 you will appreciate not having to touch the drool covered ball.