rork, on Dec 22 2008, 06:24 PM, said:
Actually...the most common misconception regarding the magstrike is that the air from the bladder somehow fires the darts. It does not. Rather, it powers a piston that fires the darts like a springer would, and a reciprocating arm that advances the clip.
Actually, that is inaccurate. The piston has no "power stroke." The air that is stored in the bladder, does in fact propel the dart out of the barrel.
Basically the air from the bladder enters the piston/tank system. As the pressure builds up, the piston head is pushed back. After it reaches a certain point, it engages the valve head and pulls it back as well. As it pulls back, the valve opens and the air rushes out and launches the dart.
If you're still skeptical, you can test this by slowly adding air to the piston/tank system. If you can't see all that is happening, and it still seems that is still launching the darts via a standart springer/plunger method, hold onto the part that gets pushed back, not allowing it to return. You'll notice that air still rushes out of the tank just as it did before, with no less force.
How banding the bladder makes a difference:
You are increasing the amount (not volume, but mass, the actual amount of air molecules) of air in the bladder. If you band it (with bike innertube, not rubberbands) you increase the amount of pressure necessary to exand the bladder. So at maximum volume, you may have 80% more air in the bladder under a higher pressure than before. This air fills the piston/tank a bit faster causing it to operate at a slightly higher rate of cycles per second. The more notable difference is the amount of shots you get per fill. Because there is more air in the bladder, and the amount of air necessary to fill the piston/tank hasn't changed, you can fill it more times before the bladder empties.
If you want to increase range:
Band the piston (with a rubber-band). Putting a band around the piston increases the amount of force necessary to push back the piston. So, a higher pressure is needed to create this force. Higher air pressure with the same volume, again, means more air in the tank/piston that can propel the dart forward. (This is like plugging the pump on your again to allow more pressure to build up in the tank).
So, in summation:
Banding the bladder (with bike intertube) slightly increases ROF and can greatly increase the amount of shots you get per bladder fill.
Banding the piston (with a rubberband) improves range.
As far as popping your bladder is concerned, I don't think that's very big of a risk when you band it with bike innertube. I've had the bike innertube "pop" (just a tear in the seam) in my Arachnophobia II which was double layered with bike innertube (a major pain to actually accomplish), but that had more to do with contact with sharp edges than over-pressurization.
Edited by imaseoulman, 02 February 2009 - 10:45 AM.