Air horn noise...
-
- Staff Sergeant 3
- Posts: 1769
- Joined: Mon Mar 21, 2011 5:41 pm
So I epoxied the solenoid holes, and made sure that they werent leaking, but it still makes an airhorn type noise. Any idea on how I can fix it?
-
- Specialist 4
- Posts: 426
- Joined: Thu Dec 18, 2008 3:42 pm
- Location: united states
You need a larger pilot valve.
I believe I explained this in your other thread... you need a pilot valve with a larger flow. Try a ball valve instead of a blowgun.
"Some say his pet elephant is pink, and that he has no understanding of "PG rated forum". All we know is, he's called JSR. "
-
- Staff Sergeant 3
- Posts: 1769
- Joined: Mon Mar 21, 2011 5:41 pm
JDP, I need the blowgun for this to work correctly, other wise it looks like a POS.... Plus it has to have multiple firings rather than one big shot....
Modify the blowgun. Generally, you can drill the output hole (or input; I forget) bigger, and make the internal moving part more spool like. There's an article in the wiki.
POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name
-
- Staff Sergeant 3
- Posts: 1769
- Joined: Mon Mar 21, 2011 5:41 pm
Modifying it worked... It now outputs one hell of alot more air, but still has an airhorn type sound... I cant drill it out any more other wise I may break the blowgun, but it still outputs more than it used to...
- Crna Legija
- First Sergeant 2
- Posts: 2333
- Joined: Sun Jul 20, 2008 5:14 am
- Location: australia
what size is you sprinkler valve?
'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson
Add me on ps3: wannafuk, 8/11/11 cant wait
--Homer Simpson
Add me on ps3: wannafuk, 8/11/11 cant wait
- Lockednloaded
- Staff Sergeant
- Posts: 1566
- Joined: Thu Sep 03, 2009 9:38 pm
- Location: Texas, USA
- Been thanked: 6 times
open up the valve and get rid of the filter on the edge of the diaphragm
I love lamp
-
- Staff Sergeant 3
- Posts: 1769
- Joined: Mon Mar 21, 2011 5:41 pm
I know I should have added on to my other thread, but I just thought of this. I notice when I shoot my rifle, the air pressure drops by 5 psi, is it possible that the air tank connected to my rifle and the chamber that is attached to the sprinkler valve is not holding enough air to make it work properly?
- Secret Squirrel
- Private 3
- Posts: 54
- Joined: Sun Aug 08, 2010 12:24 pm
If you mean your tank pressure drops by 5psi with each shot, that is unavoidable. You are letting air out with each shot. The amount of air in the tank is related to the pressure and volume of the tank (ideal gas law, PV=nRT) The volume of your tank is constant, so if air is released, the pressure must drop.
If you want more consistent shots you can attach a regulator between the tank and your firing chamber. By filling the tank to a higher pressure than the reg is set to, you can get multiple shots of the same power, rather than decreasing power with each shot.
If you want more consistent shots you can attach a regulator between the tank and your firing chamber. By filling the tank to a higher pressure than the reg is set to, you can get multiple shots of the same power, rather than decreasing power with each shot.
-
- Staff Sergeant 3
- Posts: 1769
- Joined: Mon Mar 21, 2011 5:41 pm
Thats not what I mean. I think the hose I have is restricting the air flow to allow only 5 psi into the chamber, because thats how much drops from the air tank...
- Gun Freak
- Lieutenant 5
- Posts: 4971
- Joined: Mon Jan 25, 2010 4:38 pm
- Location: Florida
- Been thanked: 7 times
Air flow cannot restrict pressure. He knows what you mean, it's you that doesn't know what you mean The compressor resevoir is larger than that of your gun, I assume. If your tank is 2 gallons for example and your gun is 1 gallon, your compressor is at 100 psi, and you try to fill your gun up, the pressure in your tank will equilize to about 65 psi. Now with a regulator, you could put 50 psi into your gun on a 100 psi compressor charge multiple times before you need to turn the compressor back on.warhead052 wrote:Thats not what I mean. I think the hose I have is restricting the air flow to allow only 5 psi into the chamber, because thats how much drops from the air tank...
Now I'm not trying to be mean or anything... but it scares me that people who aren't educated in this science are making these devices. If you don't know what you're doing... don't do it. I mean it's like the guy who thought a short piece of pipe couldn't hold as much pressure as a longer piece of the same pipe. Just know what you're doing... research always helps before you take the plunge into this hobby.
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
-
- Staff Sergeant 3
- Posts: 1769
- Joined: Mon Mar 21, 2011 5:41 pm
I under stand, just that I dont get why it drops only 5 psi... I need to install a pressure gauge on the chamber as well as the air tank... that way I can see the pressure without having to take off the air tank....
Crna, its a 1" valve.
Lockednloaded, will that increase flow?
JDP, I dont have a grinder....
Crna, its a 1" valve.
Lockednloaded, will that increase flow?
JDP, I dont have a grinder....
- Secret Squirrel
- Private 3
- Posts: 54
- Joined: Sun Aug 08, 2010 12:24 pm
Without a reg between your tank and chamber the pressure in each will be the same. The flow restriction of the hose will slow the time it takes the two to equalize, a good thing if you want multiple shots.
The reason your tank is only dropping 5 psi is likely because it is significantly larger than your chamber. As I said before pressure and volume are related by the ideal gas law (seriously, look into this more) PV = nRT. That stands for Pressure * Volume = moles of gas * A constant * Temperature.
Here's a sample calculation (ignoring atmospheric pressure):
Say your tank is 100 in.^3 and your chamber is 10 in.^3. Both are filled to 100psi. If we empty the air in the chamber, there is no pressure in the chamber. So the air in the tank, 100 in.^3 * 100 psi, expands to fill both the tank and chamber, reducing its pressure.
(100in.^3 * 100psi)/110in.^3 = 91psi
the same would happen again on the next shot.
(100in.^3 * 91psi)/110in.^3 = 83psi
So for my example cannon, the tank pressure is dropping between 8 and 9 psi each shot. You can do this same math for your cannon to figure out how much the tank pressure will drop for each shot, and how many usable shots per fill you can get.
The reason your tank is only dropping 5 psi is likely because it is significantly larger than your chamber. As I said before pressure and volume are related by the ideal gas law (seriously, look into this more) PV = nRT. That stands for Pressure * Volume = moles of gas * A constant * Temperature.
Here's a sample calculation (ignoring atmospheric pressure):
Say your tank is 100 in.^3 and your chamber is 10 in.^3. Both are filled to 100psi. If we empty the air in the chamber, there is no pressure in the chamber. So the air in the tank, 100 in.^3 * 100 psi, expands to fill both the tank and chamber, reducing its pressure.
(100in.^3 * 100psi)/110in.^3 = 91psi
the same would happen again on the next shot.
(100in.^3 * 91psi)/110in.^3 = 83psi
So for my example cannon, the tank pressure is dropping between 8 and 9 psi each shot. You can do this same math for your cannon to figure out how much the tank pressure will drop for each shot, and how many usable shots per fill you can get.