Creating Backspin

[ScatterPlot]

I think it would be cool to have like 2 barrels on your gun, one for doing normal stuff and then like a "support" barrel, with backspin and all. Kinda like the grenade launcher that I think Tippmann used to sell that would bolt on underneath your gun. This would also be cool if you could get some of those little fins that you could glue to the backs of individual paintballs, cause you know you gotta like muzzleload each one of them. I wish someone still made those things. Hmm, might try something with some gelatin sometime. Whatever.

[Commissar_Loki]

Paint does spin. Take a single paintball... it does spin. Yes there is liquid inside of it, however it is quite thick. I'd be like compares a volleyball filled with water, and a volleyball filled with pudding. Now the effectiveness of this is argueable, but I just wanted to interject.


-Butch

[hitech]

Just a BTW, an undertow style bolt for the 'mag isn't going to work because the 'mag bolt "spins".

[TeeJay11]

I put a piece of really good masking tape on the top of my stock tippmann barrel a while back. it worked reallllly well i was very suprised. and i folded part of it around the back so the tape stayed. just my experience

[ColdFuzion]

The tape thing works with small paint and a large barrel, but it gets shot out very often, If a Mag bolt didn't rotate in the chamber (Fixable), you could try the replacement Foamie idea. If you milled a slit in the bottom right or left of the inside of the body, you could put an extruding slit on the bolt, thus no spinning. Basically, make a rail mount bolt. If you pull that off with a nylatron bolt w/ interchangeable foamie, you will be my hero.

-Cold

[kurama]

I havent read the entire thread so bear with me...

I think hybrid technologies made a bolt on the same idea as a 2-piece bolt with several heads. One supposedly added backspin. While it seemed to get 5-10 ft more than my cocker (it was a cocker bolt, so we both used cockers to keep it simple), 5-10ft is within the margin of error. I think the backspin idea is hype. Why?

I remember this from somewhere. It was either a TK Tech-tip or warpig, I think. The paintball's shell will spin but the fill does not, so the spin would do pretty much nothing. Take a glass of ice water and spin it. The ice doesn't move, and the fill in a paintball acts the same way. The bolt idea has been tried many times with no sucess so far...

As with the flatline, I've seen one and it does seem to give more range. I'm guessing it gets enough RPM to move the fill or the way that it works. Anyways, the backspin seems to be the only thing holding it in the air, and the velocity seems to drop quicker. This is all done by eye, so I can't proove it slows faster, but it seems to be noticable easily. Because the paintball's speed slows, the "effective range" aka the range the paintball has a signifigant chance to break drops. Also, how lazy are you? Hold your marker at a 45 degree angle for more distance. Its not worth 150$ or so, IMHO.

Still, backspin is a great topic in paintball, since it has spawned many theories and such. What may work, along the lines of tape, would be a very large bore barrel that internally, the bore goes large to small to large gradually. The small part would be a small bore and have the same affect as tape, minus ball breaks and bunching. Even if this would work, which I bet it wouldn't, it would be very hard to manufacture one, and it would be incredibly sensitive to paint.

[Dawg047]

You have a good point with the shell just spinning around the outside of the fill. However, some paintballs have really thick fills like the consistency of toothpaste. I think with the right paint, a backspin system and some luck, it could work though.

[ScatterPlot]

It doesn't matter at all if the fill spins. The rotational inertia is not what causes the backspin, it's the outside of the ball spinning that gives it aerodynamic lift. And I would tend to think that the fill would spin with the ball since it is so incredibly thick, sticky, etc. But it doesn't matter either way.

Also, the flatline allows you to shoot further with a flatter trajectory- like you would need when there are trees above you so you can't arc it at 45 degrees.

[kurama]

Actually the flatline isnt a flat trajectory. Its just marketing. It really feels like its lobbing it. And no, the shell spinning doesnt give enough spin to add the range advertised. It works, but not nearly as well as they say it does.

And 2 barrels wouldnt work since different barrels yield different velocity. Unsafe.

[slave]

This whole spin debate was recently put to rest I believe in a recent magazine article. I got the mag laying around in one of my stacks and I'll try to hunt it down. A couple guys actually got quote scientific and did a full out study on the effects of barrels, paint, air pressure, spin, yada yada yada to more or less prove certain theories rather then come up with what is best product wise (that part broke my heart as I was expecting a full on study showing what barrels may be better/etc)

[MadPSIence]

Tippmann - Flatline

Flat trajectory from backspin. Read about it