My lunatics not to be undone with some technical direction from me and some help from out Boiler makers , made one from P-22, CRMO. We fabricated an accumulator with a high pressure quick release solenoid valve.
The tube was 3" and we pumped up the accumulator to 3600 PSI from the starting air compressor on our Gas Turbine. I think we might have put one out as far as Deer Island.
It's all fun and games until somebody loses an Island! These days I often stop and think about how many times I was within mere inches or seconds of a Darwin award...mostly because I never stopped to think about anything in those days.