Here’s one of the first few test launches of the compressed air rocket. Please excuse the portrait video, I didn’t film it…
This was about 60psi, although the limiting factor is really the restricted flow rate through the valve. You can hear the air hissing out for a good long while after the rocket is clear of the launch tube.
It’s great fun to play with!
At some point, I plan to try an indirect acting solenoid valve, with a larger aperture. When the weather improves that is…