SpudFiles

Basically, if i fill up my chamber with 100 psi of air pressure. Is there a way to find out how many newtons of force are acting on the ammunition right as the valve is released?


thanks for your help

monkeyman

i did use water, and found the volume in mililters, then converted mililiters to cubic inches. Sorry for all the digits after the period.

All I want to know is if I did the calculations right in my second post in this thread

thanks!

why do you need my barrel?

I havnt measured it yet, but my chamber is: 170.866483 cubic inches
and my meter is 6.102374 cubic inches

BigGrib wrote:http://www.advancedspuds.com/SpudToolonline.htm

this might help you if you haven't already checked it out

yeah i have seen that, but are my calculations correct?

woops I just ordered the 8063k31 instead. Will that work? Or should I order the other one too?

no, see i have a meter like this
http://www.advancedspuds.com/propane.htm

all i need to do is install a schrader valve into my combustion chamber, then press the air chuck from my propane meter system onto it which will release the gas from the meter into the chamber.

could someone please tell me ...

if i have this on my propane meter.
http://www.sjdiscounttools.com/mils-699.html

is this the schrader valve that I need to get the gas from the meter into the chamber

http://www.mcmaster.com/ctlg/DisplCtlgPage.aspx?ReqTyp=CATALOG&CtlgPgNbr=435&RelatedCtlgPgs=435,1146&term=Schrader%2bAir%2bValves ...

alright, I already have a propane meter, it looks somewhat like this one.
http://www.advancedspuds.com/propane.htm

next,
I measured the volume of my meter, and my combustion chamber on my gun.

My meter is: 6.102374 cubic inches
Chamber: 170.866483 cubic inches

I want to start my tests with 1 ...

for my science project, I want to find the optimum air to propane ration when firing a spud gun, how can I go around finding how much propane do I put into the chamber when I want to use 1% propane, 2% propane and so on and so forth?