My first large cannon

[DYI]

Nova, as much as I hate to rain on your parade, with the exact specs he quotes, assuming 100ms opening (slow because it's a PVC BV), the 72" barrel, and a 200 gram projectile with a drag coefficient of 0.5, GGDT predicts exactly 800 feet.
Almost uncanny, isn't it?

With a 20' barrel he'd roughly double the range, which really isn't worth it.

[jr]

spudchucker do us a favor measure the distance! I thought you said it was for distance- then why are you shooting at signs?

Wouldn't that classify as destruction!

[frankrede]

Ok what range in feet do you think this cannon could achieve?

depends on the ammo, temperature, wind, angle and how you measure.

[Novacastrian]

Ok what range in feet do you think this cannon could achieve?

At an operating pressure of 60psi with your 6' barrel, a D cell as ammo i would predict *looks into Crystal ball* a distance of around 400', that is being generous.
Please don't think that i am trying to erk you mate, i just don't like when numbers get thrown around- i have a hard enough time trying to understand them as they are.

Edit- DYI, i like rain, i guess the only thing for spudchucker to do is test the distance achieved, with either a tape measure or a walker wheel.

[Sticky_Tape]

spudchucker do us a favor measure the distance! I thought you said it was for distance- then why are you shooting at signs?

Wouldn't that classify as destruction!

Well yes but that isn't why I made the cannon I just wanted to see what it would do.

Weird I tried downloading ggdt but it wouldn't work can sombody tell me how I tried 3 times and failed.

[Novacastrian]

I know when i tried to download GGDT only certain links worked, try having a look for a different link.