C:B ratio
I have been trying to develop plans for a new spud gun. I am a little unsure if my calculations are right though. I thought of a 4 x 12" CC and a 1.5 x 60" barrel. I tried to do the math and I came up with a ratio of about 1.5:1. Am I close or way off?
-Matt
-
jimmy101
- Sergeant Major 2
- Posts: 3210
- Joined: Wed Mar 28, 2007 9:48 am
- Location: Greenwood, Indiana
- Has thanked: 6 times
- Been thanked: 18 times
- Contact:
The simplest equation to calc CB ratio of your guns is just:
(4*4*12)/(1.5*1.5*60) = 1.4222
Or
(2*2*12)/(0.75*0.75*60) = 1.4222
Or
V<sub>chamber</sub> = (Pi)(r<sub>chamber</sub><sup>2</sup>)(L<sub>chamber</sub>)
V<sub>barrel</sub> = (Pi)(r<sub>barrel</sub><sup>2</sup>)(L<sub>barrel</sub>)
Where r is the radius and L the length.
The CB is V<sub>chamber</sub>/V<sub>barrel</sub>
(4*4*12)/(1.5*1.5*60) = 1.4222
Or
(2*2*12)/(0.75*0.75*60) = 1.4222
Or
V<sub>chamber</sub> = (Pi)(r<sub>chamber</sub><sup>2</sup>)(L<sub>chamber</sub>)
V<sub>barrel</sub> = (Pi)(r<sub>barrel</sub><sup>2</sup>)(L<sub>barrel</sub>)
Where r is the radius and L the length.
The CB is V<sub>chamber</sub>/V<sub>barrel</sub>
Create an account or sign in to join the discussion
You need to be a member in order to post a reply
Create an account
Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute
Sign in
-
- Similar Topics
- Replies
- Views
- Last post
-
- 4 Replies
- 2925 Views
-
Last post by Rambo
-
- 24 Replies
- 6125 Views
-
Last post by SpudBlaster15
-
- 2 Replies
- 1318 Views
-
Last post by nghiagero
-
- 14 Replies
- 2806 Views
-
Last post by Ragnarok
-
- 18 Replies
- 8621 Views
-
Last post by runningawaypyro
