My APH

[Killer 7]

I have been working on homemades for some time now this one is an APH. It was my first attempt at one. I made the pump according to Doom’s pump article. It takes 60-70 pumps to get full pressure. The rest of the gun is made from ¾” and 2” pvc pipe. The nozzle you see firing is the ¼” nozzle. The gun gets the best range with the 3/8” nozzle. The end puddle was at 61”, and the last drop fell at 65”. The riot blast puts out approx. 60 oz. per second. I had fun making this one.

[Ben]

Welcome to SSC!

That's an impressive water gun. Good to see that you're getting some nice ranges out of it too. That seems to bust the myth that 2 inch chamber water guns are less powerful. It comes down to how much pressure you put into the chambers and a bit about how much water is in the chamber.

Mind if we use those images in our new APH article? I've made a page with a bunch of images of different APHs.

Do you have any other homemade water guns other than this APH? Since you said you've been working on them for a while, I'd be interesting in seeing what else you have to offer.

Wait for our website update in a month or two and then make a CPH.

[Killer 7]

Thank you Ben.
I had never heard that myth about 2" pressure chamber guns being less powerful, but I think it all has to do with PC capacity and pressure as you said.
I do not mind if you use that picture for the APH article.
I have already made a CPH, and will be posting about it soon.

I have also made a water balloon launcher, and helped to make another APH, and CPH with a friend.

[Silence]

Welcome to the forums, Killer 7! You've built quite a refined and impressive water gun there.

Do you know which nozzle size was being used in the picture? It looks fairly large, yet well-laminated (clear and with little turbulence). Poor nozzles are probably the reason my homemade gets terrible range.

I'm looking forward to seeing your CPH.

[Drenchenator]

Good job. 60 to 70 pumps is ridiculous--but who could argue with the results? I'm looking forward to seeing your CPH.

[Killer 7]

The nozzle firing is the 1/4" nozzle.
I agree 60-70 pumps is way too many, a problem I intend to address in future water guns.
The reason I think it shoots so far is its large PC capacity I measured it once and it was around 120 fluid oz. of water.

[Silence]

There are several things that help get good range. 1/4"-1/2" nozzles are the norm, at least if they're cleanly drilled. High pressure (from a narrow pump) helps, too. Large barrel tubing helps a bit. But all of those mean more output, which is why powerful water guns ought to have large pressure chambers - otherwise, the shots wouldn't last long.

[WaterWolf]

Bit of a late question, but I was a bit confused by your description.
Is the pump of a 1/2" or 3/4" diameter?

Because you had said that:

The rest of the gun is made from ¾” and 2” pvc pipe.

But also mentioned that you followed Doom's pump guide, which is 1/2".

Thanks for the the info and nice homemade.

[jaredtheplain]

so, how long does it take to pump that thing, i mean, jeez man, its got five chambers

[Ben]

I missed this post. Welcome to SSC!

60 or more pumps would take a while. The first 30 or so will be a lot easier than the second 30. I could imagine it could take longer than 30 seconds to pump it up depending on your strength.

[Killer 7]

Actually only the last 10-15 pumps are very hard. Most of them are not "easy", but not extremely difficult.