I alluded in my first post regarding the air rocket launcher that I made some tweaks to the design for safety and to enhance the learning experience of the kids that are making the rockets. Here are two of the additions I made.
Oversized Pressure Gauge –
I installed a large 3 1/2” pressure gauge on the launcher to help the kids really see the pressure chamber build up then suddenly release when the button is pushed. I find that you can tell someone there is a lot of stored energy inside a PVC pipe and they may believe you but an analog gauge climbing up to the proper pressure is far more fun to watch.
100 PSI Safety Valve –
My next addition is a 100 PSI pressure valve. This performs two functions. First it will protect the launcher from being over pressurized if a large compressor is being used and second it gives a handy way to release the pressure if there is a failure with the valve.
The splitter I used was located at Menards in the air compressor section.