| Author |
 Topic  |
|
|
snicker
The Man
USA
Member Since: |
 Posted - 01/09/2006 : 01:19:17 AM
|
Looking for a cheap and easy way to chronograph your airsoft gun? You've read about using a coke can before but what's the proper way to get an accurate test? Cheesehead hopes to answer those questions with this article. |
|
|
TehLlama
General
USA
Member Since: 05/25/2004 |
Posted - 01/09/2006 : 1:24:12 PM
|
I question that a .25g BB will have an easier time puncturing a soda can -- I can't with a stock Marui gun, and since lower muzzle velocity/higher impoulse against a relatively light target is a bit iffy -- I'd say it's a mixed bag.
Also, shooting coffee cans isn't a mortal sin, just have eye protection for yourself an everything around that needs it, and don't rely on the puncturing to tell you anything. |
 |
|
|
RLB
Death Dealer
USA
Member Since: 05/25/2004 |
Posted - 01/09/2006 : 1:58:58 PM
|
I have personally done this test (and shared my results with Cheesehead). The "Poor Man's Chrono" will never replace a true chronograph to determine FPS, but despite what many people say, it is consistent enough (when done correctly) to give you a ball park range of the FPS your gun is shooting. Shooting the edge of the can (top or bottom) is such a small area that results may not be as consistent as other areas of an aluminum can though.
Again, I don't advocate that this is a replacement of a real chronograph. but the results are more realistic than a lot of people give them credit for if you are not going for precise numbers.
I thought this was a good & valuable review. |
|
|
|
Delta D
Sergeant
USA
Member Since: 08/03/2004 |
Posted - 01/12/2006 : 09:39:23 AM
|
I request another test done with .25BB
I never use .2 anymore. The ratio should remain the same with .25 BB, of course FPS will be lower. |
|
|
|
pyrochris
Major
USA
Member Since: 03/05/2005 |
Posted - 01/12/2006 : 2:16:46 PM
|
That was a very good analysis of the poor man's chrono. While I think the poor man's chrono is good for providing ball-park FPS figures, I never trusted redwolf's numbers. I'm glad that someone with the proper equipment and smarts revisited the poor man's chrono. Also, Coke is my favorite soft drink as it turns out, so I've got a constant supply of coke cans! By the way, has anyone tried returning coke cans for 10 cents after they have been shot? (I live in Michigan, where aluminum cans can be returned for 10 cents each)
I'm working on possibly marketing a "middle class" chronograph (my design) that will be sold on an ebay store. The device has nearly the same accuracy as an electronic chronograph when used properly. I've mentioned my idea in the past, but no one ever took me seriously.
That's lucky for me, cause now I have a great opportunity for an experimental business venture! |
|
|
|
TehLlama
General
USA
Member Since: 05/25/2004 |
Posted - 01/12/2006 : 2:28:32 PM
|
| Well, I just didn't think it was thorough enough to constitue a finished article -- I say keep it open for editing, adding on, and further fleshing out so that the final Poor Man's Chrono article can be actually definitive. |
|
|
|
pendra37
Private
Member Since: 07/06/2004 |
Posted - 01/13/2006 : 1:51:11 PM
|
| Sound chrono all the way. 1 comp 1 mic, common household items. You can set it up fast and it is very accurate. |
|
|
|
pyrochris
Major
USA
Member Since: 03/05/2005 |
Posted - 01/13/2006 : 3:36:39 PM
|
quote:
Originally posted by pendra37
Sound chrono all the way. 1 comp 1 mic, common household items. You can set it up fast and it is very accurate.
Never heard of that before. My chrono doesn't even use electricity.
How does the sound chrono work? |
|
|
|
Delta D
Sergeant
USA
Member Since: 08/03/2004 |
Posted - 01/13/2006 : 7:56:20 PM
|
quote:
Originally posted by pendra37
Sound chrono all the way. 1 comp 1 mic, common household items. You can set it up fast and it is very accurate.
you're thinking about measuring [b]ROF[/b]...
you use a mic to measure the sound of the piston hitting and measure the distance between the peaks of the sound wave |
|
|
|
pyrochris
Major
USA
Member Since: 03/05/2005 |
Posted - 01/13/2006 : 10:42:01 PM
|
| Delta D, don't you mean ROF? |
|
|
|
snaper
Private
![]()
Member Since: 09/17/2005 |
Posted - 01/18/2006 : 4:07:59 PM
|
What chronograph was used in this test? I have been using a paintball chronograph in my local field, and I suspect that it is way off. Can anyone comment on the accuracy of different chronograph? What type is good for airsoft?
|
|
|
|
snowman
Staff Writer
Member Since: 02/05/2003 |
Posted - 01/21/2006 : 5:03:37 PM
|
Interesting article.
I'm very sceptical of the Coke Can test, but this article goes some way to explaining why different people get such different results.
I'd be interested in the relative performance of some other cans (Pepsi would be a good one - I have lots of holed Pepsi Max cans 
Maybe time to revisit this subject with some testing of my own (although I'll be hard pressed to generate 290+fps from a gas gun at the moment!!!)
Cheers. |
|
|
|
Mr. Marui
BANNED
![]()
Member Since: 12/19/2004 |
Posted - 01/21/2006 : 5:31:17 PM
|
Nice update.
|
|
|
|
airsoft4ever
Sergeant
USA
Member Since: 11/06/2005 |
Posted - 01/22/2006 : 08:05:32 AM
|
Cool I have never tried one is it that accurate?But that's cool!Thanks!
Mr. Marui do something about that avatar ewwww.
Thanks!
~airsoft4ever~ |
|
|
|
chewondave
Captain
Member Since: 01/11/2005 |
Posted - 01/27/2006 : 5:07:40 PM
|
| Thanks for this update. The Redwolf guide does have more instructive pictures, I suggest you show that the edge of the can does not literally mean the edge, but very close to the edge. I tried shooting the very edge, and suffice to say, i somehow knew even with a 550fps rifle, it's not going to go through. Otherwise, very helpful. |
|
|
|
Lich_King87
Private
Member Since: 12/22/2005 |
Posted - 02/02/2006 : 4:19:51 PM
|
| My friend tried this and got pretty solid results,(the fps that his gun does) however he used Faygo cans. So that may have flawed it a bit. |
|
|
|
Rain_Man
Private
![]()
USA
Member Since: 01/26/2006 |
Posted - 02/04/2006 : 11:18:22 PM
|
when you can put a .28 almost through both sides of an empty can of green gas at ten feet in one shot like sam from replisoft you have achieved a decent fps and you can be proud of yourself.
we have estimated his mp5 A4(8inch barrel-woot!) to be shooting about 700fps with matrix .28 bb's
Edit: ...and this is related to this thread how? This is not a thread for people to boast of their or others' achievements. Keep this on topic.
- RLB |
|
|
| |
Topic |
|
AS-R: The Poor Man's Chrono
