SpudFiles

Blitz, and Gun Freak,

I've played with GGDT a good bit now, and what you've suggested seems absolutely correct at higher chamber pressures.

For lower chamber pressures (75 PSI) it seems like a high chamber volume, and a shorter barrel would work better.

I'll keep running the numbers though.

Thanks,

Duane

Well, most of my parts arrived today, thanks to my friendly brown truck driver.

I'll try rounding up the other odds and ends, and try putting it together this week-end.

In the meantime, I'm still playing with GGDT.

Thanks,

Duane

Woohoo. Pics!

Blitz,

Pictures will come. Be patient. Old men don't move fast. 8)

Thanks,

Duane

duane wrote:thanks to my friendly brown truck driver

That sounds vaguely like a terrible euphemism

My truck driver's brown too. But telling him that sounds racist.

I love it when my friendly brown truck driver pulls up outside.

8)

Duane

Heehee, I know the feeling.

That's how I felt when I was waiting for my 2" piston valve parts from plumbing supply 8)

Gun Freak wrote:That's how I felt when I was waiting for my 2" piston valve parts from plumbing supply 8)

Such a feeling of glee. Almost euphoric. Can definitely feed poor spending habits.

I just love the idea of being able to see something online and have it magically materialize at my doorstep in a couple days

You'd almost think it was materialized out of thin air just for you. But then, it shouldn't take so long to arrive then.

I suppose, but teleportation can't be too far away in the future!

Well, I've made a "little" progress. 8)

After playing with performance numbers from GGDT, my idea for a tennis ball mortar turned into a tennis ball cannon. Maybe next time.

Sorry about the crappy photo... I am not known for my photography skills.



I've still got to come up with a way to brace the muzzle end of the barrel to the chamber. It's way too long and floppy for my liking.

Duane

You got a few options. You could cut out a bracket and then zip tie the barrel and chamber together, for example. Or a large hose clamp. Or something.