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 70 users online :: 3 registered, 0 hidden and 67 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

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

The Team
Administrators
Global Moderators
global_moderators.png CS

What is wrong with this gun?

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

What is wrong with this gun?

Unread postAuthor: Explosions-R-Us » Wed Nov 08, 2006 5:25 pm

The chamber is Sch. 40 1.5", it is 40" long. The two barrels I've tried are both Sch 40 1" both 36" and 72" long. I had a ball valve on it and could get about 150+ yds out of it. I figured it was time for an upgrade so I went to Home Depot and got a Lawn Genie 54004 1" sprinkler valve (no flow control). Now at 100 PSI, I can get about 20 ft from a potato. I know modding the sprinkler valve would help, as it make a airhorn sound, but I was going to wait a little before I tried to mod it. I have 3 - 9V batteries running to a momentary switch. It was rated for 24V , so I figured that was enough. What is the problem here? With either the 36" or 72" barrel, I can only get about 20 ft of range. Also, I know it looks bad, but I was just trying to get it working good before I make it look good.
Image
Image
Thanks,
RD
  • 0


Explosions-R-Us
Private
Private
 
Posts: 11
Joined: Mon Sep 04, 2006 6:43 pm
Reputation: 0

Unread postAuthor: POS » Wed Nov 08, 2006 5:30 pm

I think you should mod the valve. Obviously the pilot pressure don't drop fast enough, what causes the honk. Honk is bad in a gun. It shouldn't honk. Honk is great loss of performance
  • 0

User avatar
POS
Major
Major
 
Posts: 395
Joined: Thu Sep 14, 2006 4:19 pm
Reputation: 0

Unread postAuthor: schmanman » Wed Nov 08, 2006 5:36 pm

what's the can zip tied to the chamber? I would go for a watermaster. I have had no problems with them whatsoever. That is puzzling, I see no problems with the whole setup. are you sure It's 100 psi?
  • 0

Persistence is a measure of faith in yourself
User avatar
schmanman
Major General
Major General
 
Posts: 1685
Joined: Sat Mar 25, 2006 12:28 pm
Location: Michigan,U.S.A
Country: United States (us)
Reputation: 0

Unread postAuthor: POS » Wed Nov 08, 2006 5:42 pm

batteries are in there
  • 0

User avatar
POS
Major
Major
 
Posts: 395
Joined: Thu Sep 14, 2006 4:19 pm
Reputation: 0

Unread postAuthor: Explosions-R-Us » Wed Nov 08, 2006 5:42 pm

Yeah, air compressor with gauge. The batteries are in the can, kinda ghetto, but holds them real nice.

RD
  • 0


Explosions-R-Us
Private
Private
 
Posts: 11
Joined: Mon Sep 04, 2006 6:43 pm
Reputation: 0

Unread postAuthor: jrrdw » Wed Nov 08, 2006 5:48 pm

I agree with POS, try modding it, looks like a butt kicker!
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6538
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: SpudStuff » Wed Nov 08, 2006 6:25 pm

The airhorn sound is when the valve opens and closes very fast. This has incredibly low flow and CV. You can modify the valve to greatly increace opening time and eliminate the horn sound. The only extra step for the valve you have, is that it has a guide rod. It is a small metal rod attached to the top of the inside of the valve. Pull it out with pliers then carefully bens a slight "L" shape on the end. Then put it through the hole in the middle of the diaphram. Then bend the otherside into another "L" shape to hold it in.

Good luck. If you have any problems catch me on AIM, I'm spudstuff11.
  • 0

User avatar
SpudStuff
Major General
Major General
 
Posts: 1410
Joined: Sat Dec 10, 2005 3:55 pm
Location: Cupertino, California
Reputation: 1

Sponsored

Sponsor
 


Unread postAuthor: Atlantis » Wed Nov 08, 2006 9:54 pm

How long do you hold down the button, is there any air left in the chamber after you fire?
  • 0

"There isn't a problem in the world that can't be solved by the proper application of explosives"
User avatar
Atlantis
Brigadier General
Brigadier General
 
Posts: 955
Joined: Sat Sep 03, 2005 10:26 pm
Location: Florida
Reputation: 0

Unread postAuthor: Explosions-R-Us » Thu Nov 09, 2006 7:39 am

Usually until all the air is gone, but the potato shoots out before the honking even begins. I thought the 72" barrel would fix that, but it didn't.

RD
  • 0


Explosions-R-Us
Private
Private
 
Posts: 11
Joined: Mon Sep 04, 2006 6:43 pm
Reputation: 0

Unread postAuthor: POS » Thu Nov 09, 2006 5:39 pm

the potatoo blocks the sound of the honk. When it is out, the pressure can create waves you can hear (the honking). So that's normal you hear is afterwards.
  • 0

User avatar
POS
Major
Major
 
Posts: 395
Joined: Thu Sep 14, 2006 4:19 pm
Reputation: 0

Unread postAuthor: nicholai » Thu Nov 09, 2006 5:58 pm

SpudStuff wrote:The airhorn sound is when the valve opens and closes very fast. This has incredibly low flow and CV. You can modify the valve to greatly increace opening time and eliminate the horn sound. The only extra step for the valve you have, is that it has a guide rod. It is a small metal rod attached to the top of the inside of the valve. Pull it out with pliers then carefully bens a slight "L" shape on the end. Then put it through the hole in the middle of the diaphram. Then bend the otherside into another "L" shape to hold it in.

Good luck. If you have any problems catch me on AIM, I'm spudstuff11.


um.. modifying the valve is not going to solve the airhorn honking sound spudstuff i dont know where the hell you read that but you have been misinformed


lmao :lol:

Honking is caused by the valve trying to seal when its dry. The honking that you hear is the slight vibrations from the diaphragm when its trying to seal itself. These valves were meant for water not air so they have to be lubricated (white lithium grease is what I use) in order to stop the honking sound.
  • 0

Image
User avatar
nicholai
Captain
Captain
 
Posts: 349
Joined: Wed Jan 04, 2006 4:18 pm
Location: Maine
Reputation: 0

Unread postAuthor: THEMOST » Thu Nov 09, 2006 9:29 pm

Will the honking eventually ruin the valve if it's not lubricated?
  • 0

User avatar
THEMOST
Sergeant
Sergeant
 
Posts: 89
Joined: Fri Oct 06, 2006 6:04 pm
Location: Midland, MI
Reputation: 0

Unread postAuthor: Explosions-R-Us » Fri Nov 10, 2006 7:50 am

How do I lube it?
Would that increase the performance?
RD
  • 0


Explosions-R-Us
Private
Private
 
Posts: 11
Joined: Mon Sep 04, 2006 6:43 pm
Reputation: 0

Unread postAuthor: jrrdw » Fri Nov 10, 2006 8:35 am

I sprayed WD-40 in both ends and unscrewed the blow gun and sprayed down there to. Not only did it make it stop honking, it also made it seal much faster. It blew WD-40 everywhere the 1st few shots, but it still works great.
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6538
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: Hotwired » Fri Nov 10, 2006 9:09 am

A spray lubricant like WD-40 as jrrdw said or oil or grease.

The honking is caused by the diaphragm so thats where the lubricant has to be.

jrrdw why down the blowgun?
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Next

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'