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| natas |
 Posted: 05/08/2012 11:48 AM Post subject: |
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Staff Sergeant
Joined: 27 Feb 2012
Posts: 125
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To me it seems like u loose too much propane in the way u fill it.
inaccurate syringe filling, and maybe u get some ventilation of the chamber everytime u open the cap.
just for fun, try to doubble the amound of propane. it will ignite on 8% too, anyways it cant be worse than what u have now  .
if this helps, and u get a bang when u doubble up, u probably loose too much propane.
if so, i would suggest getting a bigger syringe that can take everything in one filling, and a airtight tube from the propane to the syringe. |
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| battlelava |
| Posted: 05/08/2012 13:05 PM Post subject: |
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Sergeant First Class
Joined: 26 Oct 2011
Posts: 142
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| What about a 1/4 hole threaded and use a bolt as a plug. What do yiu mean remove the orifice |
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| DYI |
| Posted: 05/08/2012 13:11 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
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| Quote: | | What about a 1/4 hole threaded and use a bolt as a plug. |
Yeah, I suppose you could do that too, as an interim solution. It would diminish usefulness in airsoft though, as it takes much longer to thread in a bolt than to close a ball valve. To that end, you should also install a fan immediately.
| Quote: | | What do yiu mean remove the orifice |
The orifice is the section of the torch head with the very small hole. Unscrew that section from the valve body - it's not doing you any good for filling syringes. |
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| battlelava |
| Posted: 05/08/2012 13:19 PM Post subject: |
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| Quote: | | To that end, you should also install a fan immediately. |
Yep, I'm dying to get one, But i have to check were i can get one for really cheap (I'm broke, only got a euro coin left from my trip to italy)
| Quote: | | The orifice is the section of the torch head with the very small hole. Unscrew that section from the valve body - it's not doing you any good for filling syringes. | Ill go try that right now |
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| natas |
| Posted: 05/08/2012 14:14 PM Post subject: |
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Staff Sergeant
Joined: 27 Feb 2012
Posts: 125
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| actually... i think a euro is enough |
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| battlelava |
| Posted: 05/08/2012 14:21 PM Post subject: |
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Sergeant First Class
Joined: 26 Oct 2011
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| natas wrote: | | actually... i think a euro is enough |
they only take us money by me |
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| natas |
| Posted: 05/08/2012 16:08 PM Post subject: |
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Staff Sergeant
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| battlelava |
| Posted: 05/08/2012 16:34 PM Post subject: |
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| natas |
| Posted: 05/08/2012 16:40 PM Post subject: |
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Staff Sergeant
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| battlelava |
| Posted: 05/08/2012 16:41 PM Post subject: |
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Sergeant First Class
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Or I can get it instore and have my gf buy it for me  |
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| jimmy101 |
| Posted: 05/08/2012 21:18 PM Post subject: |
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Lieutenant General
Joined: 28 Mar 2007
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Another way to make an injection port is to just install a Schrader valve (fancy name for a car tire stem). If you have a needle for your syringe you permanently remove the stem from the tire valve. The syringe needle will fit through the stem-less valve (of course the "valve" is no longer a valve once the stem is removed). The plastic screw on cap for the stem is more than strong enough to contain the combustion pressures.
You can get a metal tire valve from a car tire shop for a buck or so.
Here is an example http://www.inpharmix.com/jps/Sluka_Spud-zooka.html
Another example, left end, upper part of the chamber, that's a chrome truck tire stem with metal cap that I inject fuel through using a syringe: 
Or you can go totally ghetto. Drill a hole in the chamber just a hair bigger than the needle. Inject the fuel and cover the little hole with a piece of tape. Surprisingly, the tap will be just fine. (Just avoid putting a body part too close to the tape covered hole just in case.  )
I suspect you have some problem in your math and that is messing up your fueling. The volume of a cylinder is pi*radius^2*length. Note that it is the radius, not the diameter, in the formula. Or just post the dimensions, internal diameter and length. |
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| battlelava |
| Posted: 05/10/2012 6:31 AM Post subject: |
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Sergeant First Class
Joined: 26 Oct 2011
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I actually have a schrader valve right here, was going to use in a pneumatic that never happened. I just have to find it on my desk.
| Quote: | | I suspect you have some problem in your math and that is messing up your fueling. The volume of a cylinder is pi*radius^2*length. Note that it is the radius, not the diameter, in the formula. Or just post the dimensions, internal diameter and length. |
From Jackssmirkingrevenge
| Quote: | First off , if you're using propane the correct percentage is 4.19%.
Chamber volume is 34.04 cubic inches, which gives us 557.8mL
If you started with metric it would have been 30.48cm x (4.83cm/2)2 x π, which is 557.8mL
I'm assuming your chamber is 1.9inch inner diameter, but we use the radius in the equation.
Correct propane volume to meter is therefore (4.19/100) x 557.8mL which gives us 23.4mL
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Edit: Here it is  |
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| natas |
| Posted: 05/10/2012 9:53 AM Post subject: |
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Staff Sergeant
Joined: 27 Feb 2012
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looks good, and for safety, remember to put it in where u have two layers of plastic
now u only need the fan i guess |
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| battlelava |
| Posted: 05/10/2012 13:44 PM Post subject: |
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Sergeant First Class
Joined: 26 Oct 2011
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| natas wrote: | looks good, and for safety, remember to put it in where u have two layers of plastic
now u only need the fan i guess | I know about the double layer. And I just got a 10$ prepaid visa card to buy a fan with |
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| natas |
| Posted: 05/10/2012 13:57 PM Post subject: |
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Staff Sergeant
Joined: 27 Feb 2012
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| i predict some good explotions coming your way soon |
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