Recent content by Tatersoup

That's not quite what I meant. Sorry for being sloppy. There are three things that I was envisioning in that statement. The pressure behind the pellet, the volume of air injected behind the pellet, and the volume of the barrel itself to the muzzle. With these parameters (plus friction loss and...

There is another possibility as well. Let's assume there's nothing really complicated going on with bullet design or friction or valves. Could it be that the velocity peaks at a lower pressure because, at the higher pressure, the bullet leaves the barrel more quickly and therefore doesn't have...

On the other hand, the higher pressures may obdurate the bullet more, pressing the bullet more tightly against the barrel and rifling and increasing friction. So, it might be that a harder lead alloy would perform better as it would not expand as much. If the air gun can accept BBs as well as...

I understand your point, it's your nomenclature that is confusing. Instead of saying, "opening the valve would increase the rate the pressure drops", I would say, "opening the valve would reduce the pressure drop" The system pressure has nothing to do with it. The rate of flow through the valve...

Probably off point, but you could do it until all birds that flew were nearing extinction from getting caught in the blades, causing the environmentalists who decided massive wind farms were green to implode on themselves.

"Also, am I right in thinking that if the Cv is 0.004 at 100%, then the Cv at 50% will be 0.002?" No. "Pressure drop across valve can be made up as this is variable within the system, let's assume 500psi for this example. Assuming it's pure water at 25°C with a specific gravity of 1 (because I...

You're in no way too old.

Well, once you take the survivalist point of view, the slide rule is worth more than its weight in gold. And, a good 5" pocket model is great for making quick calculations and comparisons on the fly. Waterproof.

I actually started out wondering if you were simply a troll but I'm guessing not. The answer is that, without units, the math is simply academic. Now, you may choose not to show units as you solve a problem you've set out on, but that's only because, if I might be frank, you are lazy; this...

In the field of civil engineering, there are a large percentage of engineers who start out with a BS and get their advanced degrees while they are earning an income.

The answer seems blatantly simple to me. BS in engineering. MS and PhD in physics. Best of both worlds. Move on. I will say that physics and mathematics fields almost always require higher degrees (if I were hiring a physicist or mathematician, it would be a PhD).

Although many have the correct answer, Chroot is the one who is correct on both the problem as well as the methods. If this problem were before a trial jury due to some engineering error, good luck with any methodology other than Choot's. This method not only solves the problem, but also...