homemade help

[soak master 2000]

every year,on 4th of july,people soak the the paraders with water guns. i need 30-35 ft range,decent output and excellent shot time
for next year of course

[Silence]

If you want to build a homemade, I would suggest going for Ben's air pressure homemade. Sounds like it'll suit your requirements quite well, and you can always browse the forums for more ideas.

[mchaos]

Well its too late for this year, but you could always build something like mine for next year...

http://forums.sscentral.org/t4516/

[soak master 2000]

im building an APH but, id like more shot time than an aph or cph. for the aph, does building2 pc's increase range and shot time or just shot time?

[Silence]

For the most part, it just increases shot time (and reduces dropoff). Pressure, nozzles, and flow (pretty much dictated by the nozzle too) are the only factors affecting range. You can reach the same pressures regardless of how many pressure chambers you have, and another PC won't increase flow because flow is still restricted in the nozzle.

[soak master 2000]

thanks for the tip. what has 15 seconds of shot time with 50 pumps?

[Ben]

I have over 30 seconds of shot time on my double chambered APH with a 5/64-inch nozzle. The gun took around 50 pumps to fully pressurize. That is excellent shot time. My CPH gets even more shot time because it has an even larger pressure chamber. If you were mistaken about the shot times from APH and CPH water guns, I think you should consider them. Regardless, any APH or CPH design can be designed to have an especially large chamber.

Larger pressure chambers increase total water capacity, increasing shot time and number of pumps. However, a small increase in power I have noticed likely from more chambers due to a slight increase in flow from to the increased number of inlets from the pressure chambers. But, the increase is largely insignificant if existant.

[soak master 2000]

thanks. my aph almost done. it has 1 chamber. instead of 4'' of 3'' pipe could you use 8'' of 1 1/2'' pipe all? i need i need is the o rings witch are coming soon

[Drenchenator]

instead of 4'' of 3'' pipe could you use 8'' of 1 1/2'' pipe all?

Most definitely not; the volume is completely different in this case. Remember the volume of a cylinder is a function of length and the radius (or half diameter) squared. Halving one and doubling the other does not result in the same volume. Besides, larger pipe sizes are cheaper per unit volume. In other words, just go with the 3" as it is cheaper for the volume and results in less length.