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Poor man's chronograph? how is it done again?

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Old May 25th, 2008, 19:00   #1
Fox Hound
 
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Poor man's chronograph? how is it done again?

My guarder replica chronie just took a dump and im trying to do an FPS guess here.

There was a web page showing how u can estimate the FPS with a pop can, if anyone can remember that let me know!
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Old May 25th, 2008, 19:04   #2
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It's on Redwolf but it's not accurate for North American pop cans.

What can it do to a can? Then we can estimate.
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Old May 25th, 2008, 19:09   #3
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ok i just finished drinking a Holsten (german) beer can, and it goes through 1 entire can, i fired at the bottom, it dents it pretty good
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Old May 25th, 2008, 19:18   #4
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If you have a mic and some space I suggest this technique:

http://www.airsoftpacific.com/viewto...er=asc&start=0

It's been pretty accurate for me.
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Old May 25th, 2008, 19:52   #5
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Quote:
Originally Posted by Fox Hound View Post
ok i just finished drinking a Holsten (german) beer can, and it goes through 1 entire can, i fired at the bottom, it dents it pretty good
Somewhere between 320 and 360-370 FPS.

Any higher and it would go through the bottom.

Any lower and it wouldn't go through both sides.
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Old May 25th, 2008, 20:00   #6
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how close should i be when firing into the cans?
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Old May 25th, 2008, 20:01   #7
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how close should i be when firing into the cans?
1-2 inches, with the can NOT braced against anything
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Old May 25th, 2008, 22:44   #8
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Quote:
Originally Posted by dpvu View Post
If you have a mic and some space I suggest this technique:

http://www.airsoftpacific.com/viewto...er=asc&start=0

It's been pretty accurate for me.
Thats for average FPS speed (over X distance), not muzzle speed.

To make this work you would need to minimize the distance between the muzzle of the gun and the can... but i would think you would need a pretty good mic/software then... hmm gonna give this a try this week.
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Old May 26th, 2008, 00:23   #9
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ok, so whats the FPS if i can go through both sides of a North American pop can at 5 meters
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Old May 26th, 2008, 00:36   #10
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I wonder if someone with a chrony could do this for our cans......
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Old May 26th, 2008, 10:06   #11
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How about a ballistic pendulum they use to determine muzzle velocity with them before chronographs were invented.
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Old May 26th, 2008, 10:16   #12
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How about people just use a fricken chronograph.


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ok, so whats the FPS if i can go through both sides of a North American pop can at 5 meters
None. All popcan chrono stats are for 1-2 inches distance.
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