Search found 27 matches

by frankenbike
Tue Jul 05, 2005 9:30 pm
Forum: Homemades
Topic: homemade cps system - simple pvc setup
Replies: 40
Views: 4657

I also thought of another "if you ain't careful, y'all might just get hurt" option for a tank. You can get an adaptor to use those small under $10 propane tanks as an air tank. You'd have to vent all the propane (and contribute to global warming, if it's true what they say about greenhouse gasses),...
by frankenbike
Tue Jul 05, 2005 2:52 pm
Forum: Homemades
Topic: homemade cps system - simple pvc setup
Replies: 40
Views: 4657

Couple of caveats about that, though. First of all, all the sch40 and sch80 PVC I've seen has a label on it that says something like "Not to be used for air pressure". But the reason I wouldn't recommend building a high pressure tank out of PVC or ABS is what you say. The joints, caps, fittings, et...
by frankenbike
Tue Jul 05, 2005 12:06 am
Forum: Homemades
Topic: homemade cps system - simple pvc setup
Replies: 40
Views: 4657

There are a lot of different ways you can arrange the pieces, use smaller tanks, etc. I just tried to make an explanatory drawing that read a little better as a kind of schematic. For materials, I wouldn't recommend PVC as the air tank if you're running over 150psi, even if it's sch80. I'd get an i...
by frankenbike
Mon Jul 04, 2005 7:17 pm
Forum: Homemades
Topic: homemade cps system - simple pvc setup
Replies: 40
Views: 4657

I've whipped out a couple of illustrations which cover at least a couple of the CAP concepts we've discussed. I hope these help a little.

Image


Image
by frankenbike
Sun Jul 03, 2005 3:40 am
Forum: Homemades
Topic: homemade cps system - simple pvc setup
Replies: 40
Views: 4657

A CAP system is pretty simple in concept. Two designs: 1. A moderately large tank with pressure in excess of what you're going to use (say 200psi), an adjustable pressure regulator (say, set to 100psi), a tube leading to the firing chamber filled with water, and a valve that you open to introduce t...
by frankenbike
Fri Jul 01, 2005 4:18 pm
Forum: Homemades
Topic: homemade cps system - simple pvc setup
Replies: 40
Views: 4657

Somewhere (don't ask me to dig up the post), I recall you stating an idea along the lines of lowering the air-pressure side during a filling process. This would allow a handpump to be able to refill the liquid-side of a piston mechanism without needing to fight a rock-solid pump. Once the liquid wa...
by frankenbike
Fri Jul 01, 2005 11:37 am
Forum: Homemades
Topic: homemade cps system - simple pvc setup
Replies: 40
Views: 4657

I still wonder, though, how much carbonation would occur if you're pressurizing water say using compressed CO2 at 150-300PSI? If the stream is carbonated, will the CO2 bubbles as they begin to form greatly disrupt the consistency of the stream, fragmenting it sooner than expected? Now that is a goo...
by frankenbike
Thu Jun 30, 2005 8:04 pm
Forum: Homemades
Topic: homemade cps system - simple pvc setup
Replies: 40
Views: 4657

Oh yea, as far as pressure sources, there's always the approach I'm working on. The large 20oz CO2 tanks with regulators favored by competitive paintball gun users. Start with 1000 PSI and enough air to propel 8 gallons of water regulated at 100 PSI. I think you'd have to be able to get the water u...
by frankenbike
Thu Jun 30, 2005 7:47 pm
Forum: Homemades
Topic: homemade cps system - simple pvc setup
Replies: 40
Views: 4657

If anyone wanted to make an APC with a divider in it, I've seen what parts would be good to accomplish this. You can get plugs that go in the PVC/ABC tubing that are glued in to seal the tubing, and cut the end flange off, and that could be your piston. Only thing is, it increases the size of your ...
by frankenbike
Thu Jun 30, 2005 1:49 pm
Forum: Homemades
Topic: homemade cps system - simple pvc setup
Replies: 40
Views: 4657

CAP systems are superior only because you have an excessively pressurized system with air charge to spare for the purposes of a soaker. But you could easily use that full charge to release a huge drenching in a few seconds, in which case it really isn't constant air pressure at all. Such systems co...
by frankenbike
Tue Jun 21, 2005 2:06 pm
Forum: Homemades
Topic: Back Pack guns - What's out there, or build my own?
Replies: 43
Views: 4266

Well, I went ahead and ordered one of these: http://www.pressurewashersdirect.com/catalog...._id=148 Expensive, but it gives me some wiggle room in performance. I've seen a picture of it in a PDF catalog (but a direct link is near impossible) and that grip looks like the grip on an assault rifle. I...
by frankenbike
Tue Jun 21, 2005 12:42 pm
Forum: Homemades
Topic: Back Pack guns - What's out there, or build my own?
Replies: 43
Views: 4266

Even when you know what you're doing, there's still the chance of some sort of design or material failure. Isn't there a show on the History or Discovery channel called "Extreme Engineering Failures" or something like that? I suppose I should spend the extra money and get the larger size. I can alw...
by frankenbike
Tue Jun 21, 2005 12:01 am
Forum: Homemades
Topic: Back Pack guns - What's out there, or build my own?
Replies: 43
Views: 4266

There is no advantage to using a power-washer gun over some other options. First off, the internal diameter is far too low for serious output, but if that is not what you are looking for, then this may be for you. Second, the price is far too high. Third, there are no real advantages to using a pow...
by frankenbike
Mon Jun 20, 2005 9:52 pm
Forum: Homemades
Topic: Back Pack guns - What's out there, or build my own?
Replies: 43
Views: 4266

Thought I posted this. Back to the original idea of the thread in getting design opinions. I'm looking at power washer guns instead of a garden hose gun. That'll give it a kind of sano look, at least the ones I've been looking at. Most have 1/4" tubes coming out of them. This might be good for the ...
by frankenbike
Mon Jun 20, 2005 5:18 pm
Forum: Homemades
Topic: Back Pack guns - What's out there, or build my own?
Replies: 43
Views: 4266

Keep in mind that power washers push 5 gallons per minute out a 1/4" orifice at 4000 PSI in some cases. I haven't heard of anyone getting killed with a power washer yet. And people who use them do turn on one another occassionally. Existence of a device does not guaranty abuse. Paintball guns can k...
by frankenbike
Mon Jun 20, 2005 2:52 pm
Forum: Homemades
Topic: Back Pack guns - What's out there, or build my own?
Replies: 43
Views: 4266

Actually, while partially true, I'd still have to tag on the safety factor as well. Unlike paintball guns and AirSoft/bb guns, water blasters are just more easily abused simply by filling it with a different liquid. That's not the "Safety Factor". That's the "Dumbass Factor". We seem to have the tw...
by frankenbike
Mon Jun 20, 2005 1:45 am
Forum: Homemades
Topic: Back Pack guns - What's out there, or build my own?
Replies: 43
Views: 4266

Or, check the trash, pawn shops and thrift stores. We have a Salvation Army store that's a good candidate for something like that. I am not going to rummage through trash. You can easily get 400+ PSI rated PVC. Schedule 120 pressure rated PVC looks like it'll take a beating from where I'm standing ...
by frankenbike
Sun Jun 19, 2005 4:08 pm
Forum: Homemades
Topic: Back Pack guns - What's out there, or build my own?
Replies: 43
Views: 4266

Wow. Good advice. I already knew about the principle of "the smoother the flow" which was why I planned to use a long tube of nearly the same diameter as the nozzle (but slightly larger). If I could still source brass sweeper nozzles locally, I could pick up a couple of them, bore them out in the l...
by frankenbike
Sun Jun 19, 2005 2:57 pm
Forum: Homemades
Topic: Back Pack guns - What's out there, or build my own?
Replies: 43
Views: 4266

If you manage to create such a 'beast', please do share some pics and info on your designs if you'd be willing. While I, myself, haven't done any home-building of a soaker as of yet, reading and learning about these devices is pretty cool. :cool: I most certainly will. That's all part of the fun. E...
by frankenbike
Sun Jun 19, 2005 4:45 am
Forum: Homemades
Topic: Back Pack guns - What's out there, or build my own?
Replies: 43
Views: 4266

Probably more like 95 at night. I'm still not certain about how this is going to take place. 50/50 chance we'll be on roller skates, which could make for an interesting battle, considering skates don't work very well on wet pavement (in which case I might go for a more conventional solution). If I ...