Ok, I guess it's back to the old "gut" build. Where I build it the way my gut tells me to build it.

It's worked before, hopefully it will work this time.


I'd rather be using a 3/4" or 1" barrel, inside the 2" chamber.

But I have limited myself to the 1/2" barrel because I have such an easy ...

HEY !! Search here, doesn't suck, after all !!

:lol: :lol: :lol:

'Tis true. I didn't bother to search about searching. :lol:

Looks like the search function CAN be made useful. And now that I have been chastized, I remember using it that way, in another lifetime, here.

Kinda sucks to be ...

Brian the brain wrote:It's been so long I can't remember....

This thread is too old to revive.
Check the date before you post please.

Age schmage.

I was yanking your chain.

Search here, sucks.

:lol: :lol: :lol:

Sad, but true,

If you search for something, you get 42 thousand results, and after spending three hours poring through those results, you realize there is absolutely nothing in those results that has anything to do with what you searched for !!!

So ...

yeah you did say that but zeus said their aint much difference performance wise between 1' of 2'' and 1' of 1''. If you realy want the 2 inch chamber go with a much longer barrel to use the extra air something like 3-4 foot long.

Ah.

I can see the point. :)

I didn't read his post that way.

It ...

Cool gun !

But did you ever consider making the barrel longer ?

Wanting to make a compact full-sized pnuematic coaxial.

I don't really think that ALL of this data is necessary to answer my basic question, (What is the optimum barrel length for a 1/2" pvc barrel, in a ~18 inch length 2" pvc coaxial chamber.), but I'll do my best to fill in the data requested ...

Let's say you're happy with a 1 1/2' 1/2" barrel, then GGDT tells me that you won't see much improvement with a 1" diameter 1' long chamber. Increasing the chamber size will marginally increase velocity.

Now if you wanted a coax with the same length barrel, then a 2" chamber the same length as ...

as for barrel length that changes with chamber size so you have to find one out before getting the other.

just go with a 1-1 barrel chamber ratio and you'll be golden

THAT was it !

Thank you very much.

As I remember it, a 2 inch pipe has more than double the volume of a one inch pipe. And so ...

You can run GGDT by installing WINE and VB6 runtime dll's using winetricks. It's extremely simple in Mint. I don't think I've ever had a linux distro installed without GGDT, HGDT, and Roller Coaster Tycoon running through WINE. :P

I refuse to install wine and the windows dlls, etc, for the same ...

IF you use a yellow color, "Ideal" brand wire-nut,
As the "base" rather than those flimsy plastic insulin things, It will be a bit more "substanstial" IMO.

The diameter is about exactly the same as an AA battery.

IF you want more velocity you are going to need higher pressure.
Bottom line ,IMO ...

You can use GGDT to figure out the barrel length...

Great tool.

But I am running linux mint.

That is a windows program.

i would say go coaxial...

I have actually been strongly leaning that way.

But I have my old spudgun already made up, and am thinking about just making it smaller.

I ...

Ok, first of all, I have been gone a while, so please forgive me if this has been covered before.

I am diabetic. I "shoot up pig dope", (insulin), every day.

I discovered recently, that the plastic 'protectors' on the hypo needles, fit perfectly inside a 1/2" pvc pipe.

The picture shows the ...

JoergS wrote:Can't and won't ask for money, my employment contract is very rigid in that regard. Plus I don't want the pressure, it's my hobby after all.

Your employment contract says you can't have a second income ???

more_eggs wrote:Hence why I went with a sewing machine.. plus it has pulleys and belts in there .. Perfect!

And the sewing machine motor can be sped up and slowed down.

A complete sewing machine also makes an excellent basis for a benchtop scroll saw. I made one, once, that used common coping saw blades.