Posted 13 December 2008 - 12:14 AM
Settle down children, settle down.
As I previously stated in the goo gauge tank extension thread, I don't see how it can improve range; mainly because the flow rate is too limited.
Again, in this thread, I will state my disbelief. It is for the same reason. Pulling back the trigger further won't make any difference in flow rate. The air can only flow as fast as the narrowest opening allows it. Let's assume that this narrowest opening is the valve opening itself. Being a circle, it has an area of pi*r^2. If the opening is 3/8" in diameter, then the area of the opening is about .11 square inches.
Now, here is where critical thinking becomes important. To ensure that the limiting factor for air flow (the narrowest point) is the valve opening, we must make sure that we are pulling back the valve head (gasket/seal/thingy) far enough that the air can rush around it and to the valve at least as fast as it can leave the valve. Ignoring turbulence, we can assume then, that the imaginary cylinder, with a base the size of the valve opening and a height of the distance between the valve opening and the valve head, must have a surface area (excluding the bases) equal to or greater than the surface area of the valve opening. Essentially, what I'm saying is, the valve head needs to be pulled back far enough so that the air can easily flow around it and out the valve opening.
So how far is that? Well, as I stated above, the minimum would be equal to the area of the valve opening. So, the formula for area of a cylinder (excluding the bases) is pi*d*h (circumference of base times height). We know that d is the same for this cylinder and the valve opening and so we can solve for h in terms of d. So, pi*d*h=pi*r^2 (r=1/2d) so h=1/4d.
So, in our case (where we are assuming the diameter of the valve opening is 3/8"), we would have to pull back the valve head 3/32". Again, that's ignoring turbulence, but even if we triple that distance, it's still only 9/32" which is just about 1/4". So, tearing out those two pins will do nothing because of the size of the valve opening is the limiting factor. And, even if you did enlarge the valve opening, the limiting factor would be barrel width, which is about 1/2", so you'd have to pull back your valve head 1/8" (or less if your valve is actually larger than 1/2").
So, mathematially, your mod just doesn't seem to work. If there was an increase in range it was likely due to something else you did.
Being in AP Physics, you can probably understand that you got a little over excited and that physics proves the futility of your mod.