Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 73 users online :: 5 registered, 0 hidden and 68 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Need help deciding on a pump

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Need help deciding on a pump

Unread postAuthor: Gun Freak » Sun Jul 18, 2010 8:09 pm

I made that fire extinguisher tank the other day. Now, I need a mobile way to pump it up when I run out in an airsoft war. A bike pump is too big... but it is an option. I can strap it on my back and use it when I get a break. A small hand pump is an option, but can't reach high pressure. A shock pump is an option, but it might take forever to pump up which is not ideal, but it is small and I can put it right on the tank which is good. A small compressor in my backpack would be another option but I really don't want to do that because of 1)the noise, and 2) the bulkiness and the need for a hose to the gun. I can also build a small hand pump, but I don't have a lot of experience with that and it would probably turn out to be a disaster. I need more suggestions. Thanks, ~GF~
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: Lockednloaded » Sun Jul 18, 2010 8:16 pm

strap some spring loaded mini pumps to your feet and run! :lol:

On a more serious note...
A long stirrup pump. The strokes would be easier and could reach higher pressure. The problem with bike pumps is that they are easy to pump on the ground, but when you mount it it becomes really hard to pump
  • 0

I love lamp
User avatar
Lockednloaded
Major General
Major General
 
Posts: 1558
Joined: Thu Sep 03, 2009 9:38 pm
Location: Texas, USA
Reputation: 0

Unread postAuthor: Gun Freak » Sun Jul 18, 2010 8:18 pm

Isn't a bike pump a stirrup pump though? When people say "homemade stirrup pump" all I see is a "homemade bike pump". Is a stirrup just like a big shocky?
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: jor2daje » Sun Jul 18, 2010 8:23 pm

how bout a hand crank pump? Get a cheap 12v compressor and modify it so instead of using the motor thats geared down, you can just use a little crank handle. I think boytonstu might have posted something about that.
  • 0

Patience is a virtue, get it if you can, seldom in a women, never in a man.
User avatar
jor2daje
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 418
Joined: Sun Oct 05, 2008 9:41 pm
Location: Southern California
Reputation: 0

Re: Need help deciding on a pump

Unread postAuthor: SpudBlaster15 » Sun Jul 18, 2010 8:51 pm

I'd go with a homemade high pressure pump. I built one a long time ago, and I could pressurize moderate sized chambers to 300+psi much more quickly than using a shock pump. If you don't know where to start looking for information, my thread from 3 years ago may be of some assistance.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Unread postAuthor: Stolly32123 » Sun Jul 18, 2010 9:03 pm

strap some spring loaded mini pumps to your feet and run! Laughing


I was thinking the exact same thing lol.
i would use a shock pump or a small bike pump strapped to the side.
  • 0

User avatar
Stolly32123
Specialist
Specialist
 
Posts: 50
Joined: Sun Jul 04, 2010 7:50 am
Location: Australia
Reputation: 0

Unread postAuthor: Clarke » Mon Jul 19, 2010 4:37 am

If you want a bike pump the Giyo air pump that i use is easily one of the best spudding pumps. It really isnt that hard to pump to 300 psi taking only about 9-10 full strokes. Its highly reliable as i have used it at 300 psi over 350 times with not one fault or breakage, i will be buying another 2 as back up pumps and at only $60 thats pretty damn good.

Edit: You could always mount a reciprocating saw attached to a shock pump and pump away lol :shock:
  • 0


Clarke
Specialist
Specialist
 
Posts: 41
Joined: Sat Apr 04, 2009 6:24 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: jackssmirkingrevenge » Mon Jul 19, 2010 5:31 am

Lockednloaded wrote:strap some spring loaded mini pumps to your feet and run! :lol:


That actually sounds like something worth working on! Say you weigh 130lbs, with a 0.5" diameter pump you could potentially take a chamber to well over 500 psi with direct pressure while running :D even more if you come up with a lever system. It would probably look rather silly, but it could certainly be made to work.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: POLAND_SPUD » Mon Jul 19, 2010 7:55 am

Image
LOL look... you just have to replace the two air springs with pumps :D
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: Gun Freak » Mon Jul 19, 2010 8:54 am

Lol, they're pump stilts :D
I think I'll go with a stirrup. However, I won't be using it on the ground. How easy should it be to pump to MAX 150 psi? And SB15, thanks for the link, it helped a lot. Did you use floating o-rings? How much less was the OD of the washer compared to the ID of the o-ring and how much could the o-ring move up and down on the shaft?
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: spudtyrrant » Mon Jul 19, 2010 9:53 am

Gun Freak wrote: How easy should it be to pump to MAX 150 psi?

well on my pump it doesn't get too difficult till you reach about 300psi, but then again i am 240#'s, it all depends on the diameter of your pump, on my 3/4" pump i can pump to 150psi with one hand.
  • 0

I ♥ ♣'in baby seals
User avatar
spudtyrrant
Colonel
Colonel
 
Posts: 550
Joined: Fri Jan 02, 2009 6:10 pm
Reputation: 0

Unread postAuthor: Gun Freak » Mon Jul 19, 2010 9:56 am

I'm thinking 3/4" copper or similar material. Most likely copper because it is cheaper thank buying a nipple, it has a smooth inside, and that is what most people use on their pumps so I know it works good.
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: Gun Freak » Mon Jul 19, 2010 9:56 am

  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: Biopyro » Mon Jul 19, 2010 2:02 pm

I guarantee a shock pump will not be worthwhile for a tank that large. My vote is definitely with a stirrup pump (aka bike pump). You'll have to use it when you get a chance to rest, but it's the only real option.
  • 0

Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety. -Benjamin Franklin
User avatar
Biopyro
Colonel
Colonel
 
Posts: 656
Joined: Fri Aug 04, 2006 5:32 am
Location: UK
Reputation: 0

Unread postAuthor: SpudBlaster15 » Mon Jul 19, 2010 2:25 pm

Gun Freak wrote:And SB15, thanks for the link, it helped a lot. Did you use floating o-rings?


Yes, the design was a floating o-ring type.

How much less was the OD of the washer compared to the ID of the o-ring?


IIRC, the o-ring had an ID of 5/8", and floated around ~1/2" diameter washers. That leaves a ~1/16" gap between the inside of the seal and the inner washers.

How much could the o-ring move up and down on the shaft?


The o-ring thickness was 3/32", and the spacing between the upper and lower steel washers was about 1/8".
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Next

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot]

Reputation System ©'