Interesting PBN thread on the HammerHead

[bjjb99]

Originally posted by demonguy8
Edit: I found the equations I needed and came out with a very CRUDE (I was VERY LAZY on decimals).14in deviation per 1fps meaning that a gun on on a bad day (+-10) has a vertical deviation of 2.8in at 30ft just from the velocity.

So while my hypothesis was SOMEWHAT correct (this is also going off my very lazy math)it would appear that this isnt quite as significant as I was hoping it would be, but IS STILL QUITE NOTICABLE

If we ignore air resistance, a paintball fired parallel to the ground at 300 fps will have dropped approximately 5.2 inches at a distance of 15 meters. At 280 fps, the same paintball will have dropped approximately 6.0 inches. We have a 0.8 inch difference over a 20 fps range, for an average of around 0.04 inches of vertical deviation per fps change in velocity.

If we include air resistance, I'm going to have to take longer than thirty seconds to calculate what's happening to the paintball. :)

BJJB

[cledford]

I like all of the thought going into this thread! Just a reminder though - the real point here is to visually simulate the movement when moving a 3 gram sphere (the mass and circumference of a paintball) @ 300fps through the air - in a manner that is simple to show people, while still being able to hand them the math on a piece of paper. While the drop (over the course of the path of flight) of the paintball due to gravity is something to keep in mind - I'm not too sure that it is relevant to my goal here. I want to develop a very easy and cheap the produce (and reproduce), low tech "paintball flight simulator" for the express purpose of easily showing people what *happens to the ball when moving *through* the air - not necessarily what happens during the course of the entire flight.

I like the idea of computer modeling - which would be great if we decided to put up a web-site about this. But it much easier for the disbelieving to cry foul about a computer program that they can't see or understand showing them something as opposed to something concrete the they can build/reproduce themselves.

Maybe both would be a good idea... A website might be a good direction to go and the software simulator would work well there...

-Calvin

[Sir_Brass]

if they arent' willing to trust a computer program programmed by a guy who knew what he was doing, then they won't trust a test in real life. computer simulations are a valid method of modeling, so if someone can't trust a reliable computer sim, then they can't be assumed to trust a real life simulation.

[demonguy8]

Originally posted by bjjb99


If we ignore air resistance, a paintball fired parallel to the ground at 300 fps will have dropped approximately 5.2 inches at a distance of 15 meters. At 280 fps, the same paintball will have dropped approximately 6.0 inches. We have a 0.8 inch difference over a 20 fps range, for an average of around 0.04 inches of vertical deviation per fps change in velocity.

If we include air resistance, I'm going to have to take longer than thirty seconds to calculate what's happening to the paintball. :)

BJJB

I had a feeling my lazyiness on decimals +whatnot was going to be a big problem... Definatly NOT the noticable difference I was hoping for. Thanx for correcting me.