jeffery7466 Posted May 22, 2014 Posted May 22, 2014 Hello guys, I am not sure if you guys knew this, but a quick way to (roughly) test the energy of a gun is by shooting into a coke can. Using 0.2g bb pellets, hold the muzzle about half an inch away from the surface of the can, at right angle, holding the can in place: Shooting into the side, if the pellet penetrates only one side and remains in the can >1 joule If the pellet penetrates one side and tears (not a clean, round hole) through the other ~1.2 joules If the pellet penetrates both sides cleanly (nice round holes) ~1.4 joules Shooting into the bottom of the can, if the pellet penetrates the centre of the bottom ~1.6 joules If the pellet penetrates near the rim of the can ~1.8 joules This is the case with the older 350ml cans, but they only selling the slightly thinner 330ml cans now. Shouldn't make much of a difference, but please do bear this in mind! Convert the energy into fps or m/s using the kinetic energy equation we all loved from school - E=0.5*mass(kg)*speed(m/s)^2 350fps with 0.2g pellet is about 1.14 joules. I hope this helps. Stay safe! EDIT: the can must be empty first!
Supporters jcheeseright Posted May 23, 2014 Supporters Posted May 23, 2014 nice copypasta. FYI 330ml has been the standard sized can in the UK for as long as I can remember... and I am OLD. team flex, Airsoft-Ed, THE FNG and 1 other 4
jeffery7466 Posted May 23, 2014 Author Posted May 23, 2014 haha, more like translate! Hmmm funny that, cause it has always been 350ml in Hong Kong until a few years ago...
CaptainDumbass Posted May 25, 2014 Posted May 25, 2014 So, tell me why my gbb pistol that fires consistently at 290fps (i own a madbull chrono) can penetrate a coke can from half an inch away????
Tariq Posted June 2, 2014 Posted June 2, 2014 This is the case with the older 350ml cans, but they only selling the slightly thinner 330ml cans now. Shouldn't make much of a difference, but please do bear this in mind! Shouldnt make much of a difference??? It makes a hell a lot of a difference. Plus the materials change between cans. Some are aluminium alloys, some are steel alloys.
Supporters Popular Post jcheeseright Posted June 2, 2014 Supporters Popular Post Posted June 2, 2014 essentially, it's not a poor man's chrono it's a feed of bullshit. you wanna know how hot your gun is shooting? chrono it. CaptainDumbass, Suzuki Yamamoto, Unrustle_Thine_Jimmies and 2 others 5
dex Posted June 2, 2014 Posted June 2, 2014 essentially, it's not a poor man's chrono it's a feed of bullshit. you wanna know how hot your gun is shooting? chrono it. Exactly, this post is arsegravy of the lowest order.
jeffery7466 Posted June 2, 2014 Author Posted June 2, 2014 Exactly, this post is arsegravy of the lowest order. All right, I see how this is This is just meant to be a crude test and did work to a certain extent. Screw you guys, I am going home
CaptainDumbass Posted June 2, 2014 Posted June 2, 2014 All right, I see how this is This is just meant to be a crude test and did work to a certain extent. Screw you guys, I am going home good idea jeffery7466 1
Undieing_Lust Posted June 28, 2014 Posted June 28, 2014 I have tryed the coke can chrono and the results are always WAY off...
ikarma70 Posted March 28, 2015 Posted March 28, 2015 With all due respect but there has been numerous posts like this in the airgun community involving the use of a yellow pages phone book with similar replies to this thread. The only way is to use a proper chrono as various factors have effects on velocities.
Supporters Popular Post Airsoft-Ed Posted March 28, 2015 Supporters Popular Post Posted March 28, 2015 Dat necro post doe CaptainDumbass, Tad, Mack and 2 others 5
n1ckh Posted March 28, 2015 Posted March 28, 2015 ^^^ its like reading a ukara debate all over again lol
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