Ok, Hurry people hurry

A place for general potato gun questions and discussion.
Locked
Darkerweb12
Specialist
Specialist
Posts: 106
Joined: Sat Aug 20, 2005 10:03 pm
Location: Madison, Wisconsin

Someone do a GGDT for me, because I am unable to download it now.

I need the meters/second velocity for a 1,828 cu. in. chamber, a ball valve opening time, 6 inch barrel diameter and 20 foot length, and 24 lbs of resistance from the projectile...
Top
User avatar
Atlantis
Corporal 5
Corporal 5
Posts: 955
Joined: Sat Sep 03, 2005 10:26 pm
Location: Florida

What size ball valve? It will have to be pretty big.
"There isn't a problem in the world that can't be solved by the proper application of explosives"
Top
Darkerweb12
Specialist
Specialist
Posts: 106
Joined: Sat Aug 20, 2005 10:03 pm
Location: Madison, Wisconsin

It was JUST on the mythbusters 20 minutes ago, its actually a 6 in butterfly valve, spun by pneumatic actuaters, but when they were explaining it, it opend relativly slowly
Top
User avatar
Atlantis
Corporal 5
Corporal 5
Posts: 955
Joined: Sat Sep 03, 2005 10:26 pm
Location: Florida

I was just watching it, I don't have NOR use GGDT, your brain is much better and I'd prefer to find out the fun way.
"There isn't a problem in the world that can't be solved by the proper application of explosives"
Top
Darkerweb12
Specialist
Specialist
Posts: 106
Joined: Sat Aug 20, 2005 10:03 pm
Location: Madison, Wisconsin

Yeah, I'm going to go weld together a 30 foot long steel spudgun, then heat up a couple gallons of water and shoot a 24 lb cannon ball through a chrono at 9:30 at night... yeah...

I'm just asking for someone to do a quick calculation to figure out the distance the cannonball flew before it hit the ground...
Top
User avatar
Atlantis
Corporal 5
Corporal 5
Posts: 955
Joined: Sat Sep 03, 2005 10:26 pm
Location: Florida

I don't believe anybody has done requests like this before, so don't feel bad if you don't get an answer, just download it when you have time, besides, GGDT measures with air not steam and water.
"There isn't a problem in the world that can't be solved by the proper application of explosives"
Top
User avatar
Velocity
Sergeant
Sergeant
Posts: 1039
Joined: Tue Feb 07, 2006 5:42 pm

you can change the type of propellant to helium, oxygen, steam, co2, etc
Top
Darkerweb12
Specialist
Specialist
Posts: 106
Joined: Sat Aug 20, 2005 10:03 pm
Location: Madison, Wisconsin

they didn't do it by the temperature, they had a guage hooked up and it read 68 psi of pressure, wether that pressure comes from air, helium, argon or whatever does not matter as much until you get to extreme pressures...
Top
User avatar
SpudStuff
Sergeant 5
Sergeant 5
Posts: 1410
Joined: Sat Dec 10, 2005 3:55 pm
Location: Cupertino, California
Contact:
Contact SpudStuff

it makes a noticeable differance at ~100psi
Top
Darkerweb12
Specialist
Specialist
Posts: 106
Joined: Sat Aug 20, 2005 10:03 pm
Location: Madison, Wisconsin

ARG... i am not trying to be exact here, i just made a guess about the chamber volume, its about as tall and as wide as Michael Moore, 5-6 feet, and 4 feet in diameter...

I just need a rough estamate
Top
User avatar
Atlantis
Corporal 5
Corporal 5
Posts: 955
Joined: Sat Sep 03, 2005 10:26 pm
Location: Florida

My track coaches name is Michael Moore, wierd. With a title like " Ok, Hurry people hurry" your kinda not caring about things we may or may not have to do, a little patience goes a long way.
"There isn't a problem in the world that can't be solved by the proper application of explosives"
Top
User avatar
CS
Moderator
Moderator
Posts: 1837
Joined: Fri Feb 18, 2005 5:32 pm
Location: Southern Utah

Errrr this topic is worthless. If it does not change soon it will be locked to elimnate access by post whores.
Top
Darkerweb12
Specialist
Specialist
Posts: 106
Joined: Sat Aug 20, 2005 10:03 pm
Location: Madison, Wisconsin

Ok, I don't really need that GGDT calculation anymore, will a mod lock this thread...
Top
Locked
  • Similar Topics
    Replies
    Views
    Last post

Return to “General Cannon Discussion”