Go Back   Super Soaker Central > Water gun technology > Engineering water guns
User Name
Password
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.

Reply
 
Thread Tools
Old 07-11-2011, 12:17 AM   #1
strato_2r5
Senior Member
 
strato_2r5's Avatar
 
Join Date: Mar 2011
Location: West Coast, USA
Posts: 162
UserID: 2402
Default High RoF WBL concept

While browsing YouTube I came across this video of a T-shirt launcher:

http://www.youtube.com/watch?v=5lfytYKcecg

What's interesting about this design is that he has a pressurized "air reservoir" and a firing chamber. This way, the reservoir could be pumped up to higher pressures than for firing. Then you could have a slightly smaller PC than usual so it takes less air to get up to pressure. You load a balloon, open the ball valve to fill the firing chamber, close it, and open the solenoid to shoot the balloon. This way, you could fire multiple shots before having to repump.
__________________
Sorry if I'm not active much, busy on another forum and another project non-soaker related.
strato_2r5 is offline   Reply With Quote
Old 07-11-2011, 03:22 AM   #2
C-A_99
Administrator
 
C-A_99's Avatar
 
Join Date: Aug 2006
Location: MI, US
Posts: 1,502
UserID: 809
Default Re: High RoF WBL concept

A regulator would be better if you'd rather have it shoot consistently instead of having the range drop in half every other shot.
__________________
HydroBrawl Water Warfare
C-A_99 is offline   Reply With Quote
Old 07-11-2011, 06:57 AM   #3
atvan
Senior Member
 
Join Date: May 2011
Posts: 451
UserID: 2462
Default Re: High RoF WBL concept

100th post!

Anyway, realize that for a well preforming launcher, you will need about 40 psi (~2.5 bar). Then think about the fact that a standard WBL's pressure chamber is about 1/2 to 2/3 the volume of the barrel. Any shorter and you will start to lose efficiency. You could shrink down the whole barrel and firing chamber, but you would likely have to design special sabots that cushion the balloon for sudden acceleration. Think tennis ball container with a few rubber bands placed so that they absorb the initial acceleration, then push the balloon faster when their acceleration slows.

You would definitely need a regulator for this design. The pressure chamber could be done in any one of a variety of ways. One is to scale up the experimental design drenchinator posted on these forums a while back. It used a moving PC to make the design trigger activated on one trigger pull, as opposed to opening a valve, closing it, then pushing a button. I was intended for nerf, but has potential here as well.

The larger pressure chamber should be no smaller than 5 times the volume of the firing chamber, and should be twice the pressure of the firing chamber(this is an estimate, and it would warm my heart if someone who knows the math of pressures worked it out for us the volume and pressure needed in the air chamber to achieve 40 psi in the firing chamber for five shots). If you used the fill-pressurize-fill technique, this will get somewhere around 6 shots at full pressure, then a few that are weaker. Any less than this, and you might as well build a design with separate PCs.

Edit: Whoa, scary long 100th post too!
atvan is offline   Reply With Quote
Old 07-28-2011, 01:34 AM   #4
DX
A Shrouded Figure
 
DX's Avatar
 
Join Date: Feb 2004
Location: Easton / New London, CT
Posts: 1,780
UserID: 75
Default Re: High RoF WBL concept

G3 Douchenator had a 3 shot air rez. However, range suffered because the middle chamber was too small and the gun was long as hell (you need to do an over-under for that). I also used no regulator, so the range sloped off by the 3rd shot. It simply had 2 ball valves, one to open the connection between air reservoir and firing chamber and one to fire. The air reservoir was pumped way high and then diluted as it was funneled into the middle chamber.
__________________
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 07-28-2011, 06:38 PM   #5
C-A_99
Administrator
 
C-A_99's Avatar
 
Join Date: Aug 2006
Location: MI, US
Posts: 1,502
UserID: 809
Default Re: High RoF WBL concept

You'll need each PC to have a separate connection in an over-under configuration (if you want to avoid using a regulator), obviously. Breech load is a must at the very least. Hoppers/magazines are very tricky to get working and probably require special sabots.
__________________
HydroBrawl Water Warfare
C-A_99 is offline   Reply With Quote
Old 07-28-2011, 07:25 PM   #6
atvan
Senior Member
 
Join Date: May 2011
Posts: 451
UserID: 2462
Default Re: High RoF WBL concept

What we need is to get boltsniper interested in WBLs. He could probably throw together a semi-auto design in an afternoon.
atvan is offline   Reply With Quote
Old 07-28-2011, 07:32 PM   #7
strato_2r5
Senior Member
 
strato_2r5's Avatar
 
Join Date: Mar 2011
Location: West Coast, USA
Posts: 162
UserID: 2402
Default Re: High RoF WBL concept

I doubt he'd make a semi-auto wbl. More like a full auto gatling gun.
__________________
Sorry if I'm not active much, busy on another forum and another project non-soaker related.
strato_2r5 is offline   Reply With Quote
Old 07-29-2011, 03:58 AM   #8
DX
A Shrouded Figure
 
DX's Avatar
 
Join Date: Feb 2004
Location: Easton / New London, CT
Posts: 1,780
UserID: 75
Default Re: High RoF WBL concept

A true hopper wouldn't work unless the sabot is flexible...a dart bends when it is seated. Darts that are too stiff or short don't fire. The sabot would have to bend without breaking the balloon. A mag would be more promising since the sabot can be rigid and fed like some oversize ammo. Those .88's in WWII are what I'm thinking of, shells the size of a pringles can. I think those were breech-loaded. There would still be problems related to keeping the balloons in the sabots while nested in the mag. Even if the mag is the perfect dimensions, the balloons can still move inside a sabot unless you spend a lot of time making one that holds it steady. And those tend to have openings that might not feed as well as a straight can.
__________________
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 07-29-2011, 07:38 AM   #9
atvan
Senior Member
 
Join Date: May 2011
Posts: 451
UserID: 2462
Default Re: High RoF WBL concept

He'd prefer a full auto single barrel system that uses shels and sabots. But that might take him a few days.
atvan is offline   Reply With Quote
Reply


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 03:50 PM.


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright ©2003 - 2011 The Super Soaker Central project