Build an Overhead Water Rocket Launcher Part 6 safety spring

Thanks so much. I'll try it this weekend

This vid is awesome! thank you so much! However, I do have one problem. When I pull the string, it pulls the pipe down, but the zip ties don't release, and the bottle doesn't go until you shift it a bit, which makes it unpredictable. Do you know what's happening? If you don't, thats ok, the video was still really helpful. Thanks again!

Hmm, I think perhaps you have the bottle jammed quite hard onto the bump in the pipe. So I think the bottle might be getting stuck. Either pump more air pressure into the bottle or don't jam it on so hard (you might have to readjust the hose clamp a bit). My rockets will not lift off if they have less than 30 PSI or so of pressure. Let me know if that solves the problem.

Slater

I tried it today for my make your own lab science project and worked like a charm. Sometimes it still stuck, but that's waht was happening. thanks alot!

thank you so much for posting this video i did this for my physic's project and i got an A =)

Thanks for the kind words. That's what keeps me going.
Slater