...I'm still pretty pleased with these two pics I took tonight.

Hi Everyone, I'm relatively new here, and previously posed this to the bleacher-reacher thread. I thought it might be more appropriate to make a new thread dedicated to my experimentation with a 3D printed internal valve. I'm open to everyone's thoughts and suggestions, and I will answer as many que...

Dimensional Analysis to the rescue!

n feet per second * (3600 feet per hour / 1 foot per second) * (1 mile per hour / 5280 feet per second) =

Cancel your units, simplify, and you get MPH = (3600n)/5280.

So just quit bitching and listen to smiley face and freefall!

Protocol is just a standard set of rules governing how things should be done. How is dimensional analysis, in any way shape or form, bullsh*t? I figure the fewer things I have to remember, the better. Why should I remember 88fps=60mph, when I can easily derive it from what I already know (5280 feet ...

Most of the danger will come from the construction of the Spud Gun, not the use, PVC being what it is, will be the main cause of failures, usually explosive. PVC is not air pressure rated. Adding to that.... And "putting too much fuel" into a spud gun generally results in a misfire. No bang at all....