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| hyldgaard |
 Posted: 11/08/2007 12:14 PM Post subject: software chronograph |
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Sergeant Major
Joined: 25 Sep 2007
Posts: 187
196.41 Spud Bux
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Hi, found this on a Danish airgun forum and thought of you guys 
It's a program that allow you to use your computer as a chrono. You place your computer excactly between your target and your muzzle, start the program, and fire. The program calculates your projectile speed at the muzzle from the sound. i havent personally tried this yet, but i have of several peple that have had good experience with this.
Enjoy 
http://talonairgun.com/softchrono/SoftChrono_beta1.ZIP |
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| LikimysCrotchus5 |
| Posted: 11/08/2007 14:58 PM Post subject: |
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Brigadier General
Joined: 04 Sep 2007
Posts: 974
2284.20 Spud Bux
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very nice!!!
I tried it with clapping my hands and it worked. Lucky for me i have a laptop so i can take it outside and try it. This is such a great help. Thx  |
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| hyldgaard |
| Posted: 11/08/2007 16:02 PM Post subject: |
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Sergeant Major
Joined: 25 Sep 2007
Posts: 187
196.41 Spud Bux
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Yea, didnt really think about those who doesnt have a laptop  but i think you get the idea with the microphone instead of the pc |
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| Maniac |
| Posted: 11/08/2007 16:37 PM Post subject: |
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Lieutenant Colonel
Joined: 23 Oct 2007
Posts: 475
533.09 Spud Bux
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would suck if you misfired  |
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| jackssmirkingrevenge |
| Posted: 11/08/2007 17:39 PM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 6480
9865.25 Spud Bux
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| Interesting, as soon as i find my *profanities* microphone i'll try it and compare with my "proper" chrony. |
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| LikimysCrotchus5 |
| Posted: 11/08/2007 18:09 PM Post subject: |
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Brigadier General
Joined: 04 Sep 2007
Posts: 974
2284.20 Spud Bux
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i tried it and these are my results:
All shots made at 100 psi
Using my recently built 1.5 inch tee piston valve cannon 3/4 inch barrel
and it has a small leak were i put in the guage, gotta epoxy that better
Ammo: Paintball
First Shot with soft crono:
Muzzle Trigger: 1074.90 ms
Impact Trigger: 1197.8 fps
2nd shot with soft crono:
Muzzle trigger: 1131.43 ms
Impact Trigger: 1200 fps
If you want to see my gun CLICK THIS
P.S. Yay 200 posts        |
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| clide |
| Posted: 11/08/2007 21:17 PM Post subject: |
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Donating Member
Joined: 06 Mar 2005
Posts: 692
1998.70 Spud Bux
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| LikimysCrotchus5 wrote: |
First Shot with soft crono:
Muzzle Trigger: 1074.90 ms
Impact Trigger: 1197.8 fps
2nd shot with soft crono:
Muzzle trigger: 1131.43 ms
Impact Trigger: 1200 fps
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I'm not sure how long your barrel is, but I can say that those numbers are probably not correct. Either you have a setting wrong or the program is picking up an echo. |
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| DYI |
| Posted: 11/08/2007 21:28 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
Posts: 2203
1271.72 Spud Bux
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I don't know how well a paintball would fare if it broke Mach 1, but I'm pretty sure that at low pressures with a gun small enough to hold you won't be breaking the speed of sound with a 5 gram projectile.
*Cue Jack finding obscure example and proving me wrong in <20 minutes* |
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| Ragnarok |
| Posted: 11/08/2007 21:50 PM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 2054
5220.52 Spud Bux
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| DYI wrote: | | I don't know how well a paintball would fare if it broke Mach 1, but I'm pretty sure that at low pressures with a gun small enough to hold you won't be breaking the speed of sound with a 5 gram projectile. |
I use 320 psi, 4' of barrel, and still I can't put a paintball past the sound barrier with HEAL - though not for lack of trying.
Maybe if I keep persisting, I'll get a fluke sonic boom.
I too would be interested to see how a 100 psi cannon has me beat by nearly 200 fps. Was the target-muzzle distance set correctly?
P.S: Yay! 19 years of age!  w00t! Well, at least on GMT. But as I was born in the UK, I don't think I need to be using US time for determining my age, do you? |
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| Thursto |
| Posted: 11/08/2007 22:06 PM Post subject: |
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Major
Joined: 02 Mar 2007
Posts: 380
720.21 Spud Bux
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Hey this program is great, i just used it, placed my laptop in the middle, pumped my gun up to 20psi (not alot i was in my room) and shot a nerf dart, and it says it shot at around 900fps or something, is that right??? i got a video of me doing it, so you can check it out, just need to upload it, and also ill get some more.
Cheers thursto |
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| Ragnarok |
| Posted: 11/08/2007 22:09 PM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 2054
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At 20 psi? - not a chance, it's physically impossible to go that fast at 20 psi because of back pressure forming ahead of the projectile.
Did you set the target - muzzle distance? It'll just give you garbage (as per GIGO - garbage in, Garbage out) if you don't. |
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| Thursto |
| Posted: 11/08/2007 22:14 PM Post subject: |
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Major
Joined: 02 Mar 2007
Posts: 380
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| How do u set muzzle distance? and is that from he tip of your barrel to the computer??? |
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| Ragnarok |
| Posted: 11/08/2007 22:18 PM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 2054
5220.52 Spud Bux
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| Muzzle to target distance, it's one of the options on the settings menu. It's set default to 40 yards, so if you're only firing over 12 feet or so, then the numbers will be a factor of 10 too big. |
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| LikimysCrotchus5 |
| Posted: 11/08/2007 22:22 PM Post subject: |
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Brigadier General
Joined: 04 Sep 2007
Posts: 974
2284.20 Spud Bux
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| Yea thats what i was thinking when i saw my results. I was thinking that they were definately wrong so i knew it was wrong but i posted it just to show you guys how accurate this was. I could have picked up an echo i believe. How do you set the muzzle distance?? |
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| Ragnarok |
| Posted: 11/08/2007 22:40 PM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 2054
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Ok, again for people who don't want to use their initiative - setting button, then top of the left hand column of inputs on the bit that pops out is the target distance.
You can also mess with the other settings to get kinetic energy, correct for drag, etc, etc. I'd also suggest turning the maximum velocity setting down to a more likely number so that it can discard possible results that are too high to be correct. Setting the volumes for impact and muzzle would also help, but that's probably going into the realms of an over complication- still, if you can work it out and set it, it'll work better.
The software might be good, but if you're not prepared to give it the right information to work with, it's useless. |
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