Ported A-5 Flatline. Where to put the holes.
Posted 30 August 2011 - 07:46 PM
I had it done at a machine shop so there were no issues and it was done correctly.
The holes are on the bottom of the front and they are pointed slightly to the side.
Ported FL 2.jpg (427.76K)
Number of downloads: 5 Ported FL 1.jpg (459.54K)
Number of downloads: 6
Ported FL 3.jpg (198.99K)
Number of downloads: 4
So far I have noticed it may be somewhat quieter, still have some side by side tests to do.
Recently I acquired another FL and have been thinking about porting it also. The question is, where should I port the new one?
Obviously not the top of the barrel as this would surely cause breakage dew to the ball hitting the edge of the hole.
What do you guys think?
Posted 31 August 2011 - 11:58 AM
When you port, you do two things. You first silence the shot( I'll explain further on), and second you do affect accuracy( I'll explain that too). And if you notice, ports are on longer than normal length barrels, mostly. Barrels with ports that actually benefit the shot are usually 12+ inch barrels, and hears why.
Ports on a barrel vent pressure behind the ball as it travels out the barrel. And the reason there is pressure behind the barrel, is because in most cases you are either shooting Co2 or some expanding gas of some kind( this also includes HPA, its still gas thats expanding out the barrel). Now, every marker has a sweet spot in barrel length, and this is due to the amount of air released after each trigger pull. If you have a lot of air release and a short barrel, you have a loud shot and poor accuracy. But if you have a short air burst with a long barrel, you will have a crap shot too, but it will be much more quieter.
With ports, people are looking for the proper balance in length( accuracy) and air efficiency( less noise). Now say your marker likes 12" barrels but you want more accuracy. A 14" barrel will work if it has ports, but this is only true if you have tuned your marker right because if your marker can only push a ball 12" before FPS starts to drop, then you should not shoot a 12" barrel to begin with. Basically, ports are to keep FPS/energy out put the same on different size barrels.
quoted myself from the 98OG.
This post has been edited by Lt.Col.Vortex: 31 August 2011 - 11:58 AM
Posted 07 September 2011 - 09:19 AM
worked on it, not the old man. The old guy would have done a better job.
The holes are 1/8" diameter and 1/8" apart.
"I like the ports so far" Do you think I should do more holes?