Go Back   Super Soaker Central > Water gun technology > Engineering water guns
User Name
FAQ Members List Calendar Mark Forums Read

Welcome to the SSC Forums! You are currently viewing our boards as a guest which gives you limited access. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and more. Registration is fast, simple and absolutely free so please, join our community today! If you have any problems with the registration process or your account login, please contact contact us.
Important note: The SSC forums are now in archive mode. WaterWar.net is the new online discussion board for the water gun hobby.

Thread Tools
Old 05-13-2006, 09:19 PM   #1
Junior member
enforcerxunion's Avatar
Join Date: May 2006
Posts: 6
UserID: 613
Question What's the most efficient way to create pressure..

What's the most efficient way to create pressure in a homemade.
In other words what's the efficient way to get water to come out of a homemade creation ? I'm not sure how to create enough pressure in a gun to get it to shoot water out. If i need a pump or something.. where to I attach it and what kind ? You probably already noticed this but i'm new at this.

'In the end, when it all comes down to it I will win'
enforcerxunion is offline   Reply With Quote
Old 05-13-2006, 09:32 PM   #2
A Shrouded Figure
DX's Avatar
Join Date: Feb 2004
Location: Easton / New London, CT
Posts: 1,780
UserID: 75

Pumps and schrader valves are the two most common ways to create pressure. It depends on the type of homemade. The most common homemades use pumps, which are attached between the first and second check valves. Refer to pictures in the APH article in SSCentral's tech section if you are unsure of how to visualize this. You can make either normal or tracked pumps, although I am the only one who bothers to make tracked pumps at the moment [takes more effort, but I prefer them for some reason].

Schrader valves are the other way to pressurize. Bike pumps are used to pump the pressure through them. They are for high pressures typically used in water balloon launchers, but can also be used in water cannons. Only one air pressure homemade type, the APR line, uses schrader valves and pumps at this time.

Consider this: Pumps are faster, but schrader valves/bike pumps can build up more pressure. It's all up to you. That's the great thing about homemades: you can make all the choices.
Mess With the Best, Get Soaked Like the Rest!

2004 Red Sox - World Series Champions
2007 Red Sox - World Series Champions!
DX is offline   Reply With Quote
Old 05-13-2006, 11:15 PM   #3
Silence's Avatar
Join Date: Apr 2006
Location: Cville, VA / Urbana, IL
Posts: 3,825
UserID: 576

You should easily understand how pumps work: when you extend the plunger, water can only come in through one of the check valves, so that's what it does; then, when you push in the plunger, the water must exit through the other check valve and into the PC, where it pressurizes the air. It doesn't get much simpler than that, but it can if you request a better explanation and/or a diagram.

Once you understand the basic pump, you could take a look at some other designs that I have recently proposed. The first, which is a "Two-Stroke Pump," is quite simple; it's also what I'm going to use in my PCgH. Basically, you have two standard pumps back-to-back, so you fill one chamber and empty the other with each stroke. The diagrams should help you comprehend that.

The other idea, the "Dual (or Two)-Stage Pump" (don't confuse "stage" and "stroke" in both methods) is relatively more complex, and it's what joannaardway will use in her PCgH. There are a few ways to implement it (my first diagram is incorrect), and joannaardway's seems to be the best. No matter what method is used, it involves two (or more) pump tubes, each with its own plunger; in one stroke, both or only the widest pump is used, and in the other stroke, only the smallest pump is used (the wider one could be used in the latter stroke if both are used in the former, in order to have a pump volume difference). Basically, you use the widest pump in the beginning (when there's less pressure/resistance) for maximum pressurization speed, and the smallest one in the end (when there's more pressure/resistance) for maximum ease of use and ability to get high pressure. That thread explains this "phenomenon" better than I do here.

Earlier, I support dual-stage pumps, and joannaardway did not (she claimed that two individual pumps are better); now, however, the roles are reversed. For me, using a pump with two parts seems more complicated (especially with joannaardway's solution of one tube inside another), and if you can get individual pumps' input and output check valves to go around each other, that would be the best. For now, I'm content with a simple two-stroke pump (though you could have a two-stroke and dual-stage pump, which would be extravagant). However, I will wait and see what joannaardway has to say about her PCgH's pump, which I agree will enable greater pressures.
Forum rules
Silence is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 03:11 AM.

Powered by vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright ©2003 - 2011 The Super Soaker Central project