
#1
Posted 23 August 2006 - 07:49 PM
*if you dont understand what im asking let me know and ill try to explain it better>
><~NERF~><
#2
Posted 23 August 2006 - 08:33 PM
P.S. you should delete you image in your sig because CX doesn't like that.
-Enigma1313
#3
Posted 23 August 2006 - 09:09 PM
#4
Posted 23 August 2006 - 10:03 PM
I made a crossbow using a bungee cord, and it got 30 ft (I never posted it 'cause I'm giving it a plunger... but... the point is, it can work). Of course, I had to cock it with both arms against my chest, and it bent the nail I was using as a catch... but, it's possible. If, that is, you're okay with 30 feet.
I would reccomend, however, just using a plunger. First off, you don't have to use as strong a spring and it'll be possible to cock; secondly, you get more air for your distance (ie, just using a spring gives you "air" the length of the spring, but using a plunger gives you the volume of your pressure chamber... which, I guarantee, is anywhere between 10-100 times more).
...and ideas are bulletproof. "
#5
Posted 23 August 2006 - 10:48 PM
You're right...bungees can be pretty cool, as davidbowie's KISS series amply shows.I made a crossbow using a bungee cord, and it got 30 ft
Plungers don't gain over bare springs because of increases in air volume (example: the FAR spring is roughly the same diameter as the PC), it's because of how quickly the stored energy is released.I would reccomend, however, just using a plunger. First off, you don't have to use as strong a spring and it'll be possible to cock; secondly, you get more air for your distance (ie, just using a spring gives you "air" the length of the spring, but using a plunger gives you the volume of your pressure chamber... which, I guarantee, is anywhere between 10-100 times more).
In the case of a spring, it stores energy when it is compressed. The energy is then released over the entire length of travel. Now, if a plunger is used to create pressure, the time in which the released energy acts on the dart is decreased; friction holds the dart in the barrel, pressure builds up behind the dart, until it overcomes the dart's friction in the barrel. This is a faster energy release than just a spring, so it goes further. The less time it takes for energy to act, the more distance you get.
At least, that's how I believe it works. Physics classes were a while ago.
Edited by Carbon, 23 August 2006 - 10:52 PM.
#6
Posted 23 August 2006 - 10:58 PM
Beaten down yet again. *cries*
...and ideas are bulletproof. "
#7
Posted 24 August 2006 - 04:18 PM
A direct spring pushes the dart its own length of travel. A (larger-than-barrel-size) plunger puts out a large volume of air, which displaces an equal volume in the barrel, which will have a length much longer than the travel of the plunger. It acts much like a lever, except that the compressibility of air takes some of the immediate oomph out of it.
I think the best way to power a gun with a spring, period, would be to use a lever or block-and-tackle setup to give a direct spring higher speed and less torque. It would be like having a plunger gun with a 1:1 ideal ratio.
#8
Posted 25 August 2006 - 05:11 PM
1.yes i know that you have to use an airplunger.......
2.and basically what i was asking was that depening on what kinfd of spring i used would make a difference.
><~NERF~><
#9
Posted 26 August 2006 - 08:20 PM
...P.S. you should delete you image in your sig because CX doesn't like that.
Good call, spotter!
*poof*
-Piney-
<!--quoteo(post=209846:date=Feb 5 2009, 06:27 PM:name=boom)--><div class='quotetop'>QUOTE(boom @ Feb 5 2009, 06:27 PM)

It's to bad you live in hawaii I bet there are not many wars there.Wait what am I saying<b> you live in hawaii you lucky bastard.</b>
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