Login    Register
User Information
We are a free and open
community, all are welcome.
Click here to Register
Who is online

In total there are 87 users online :: 3 registered, 0 hidden and 84 guests

Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], Majestic-12 [Bot] based on users active over the past 5 minutes

The Team
Global Moderators
global_moderators.png CS

finding force using volume and psi HELP!!!

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
  • Author

Unread postAuthor: kydavies » Fri Apr 23, 2010 11:13 pm

all you need to know is that potato is gone!
  • 0

User avatar
1st Lieutenant
1st Lieutenant
Posts: 258
Joined: Thu Apr 22, 2010 9:09 pm
Location: Comox BC
Reputation: 0

Unread postAuthor: jimmy101 » Fri Apr 23, 2010 11:59 pm

1.5 diameter barrel potato mass=.25kg

The mass seems way too high. I would WAG the spud at less than 0.10Kg and perhaps as little as 0.05Kg depending on if you use the full spud or a half spud.

Changing the mass will change the muzzle velocity estimate by the square root of the two masses. So if the spud is actually 0.1Kg instead of 0.25Kg then the expected muzzle velocity is scaled by SQRT(0.25/0.10)=1.6
  • 0


Lieutenant General
Lieutenant General
Posts: 3159
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 14


Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Majestic-12 [Bot]

Reputation System ©'