Chris_B
Members
- Jan 7, 2017
- 246
- 7
I made my own graph on the joule creep. I know there's loads already done out there, but it's a way of learning it by creating your own I guess.
I only used 4 variants of BB weights for my graph, but you can visually see the gaps between each weight, which is the variation in energy applied to achieve the same velocity to the BB weight below it.
To understand it better, you chrono your gas gun on 0.20g to get 350fps (for instance, I know it's not a target), great! Your gun is legal on 0.20g as you get 1.1381J, but then you switch to your preferred playing weight of BB. You then chrono it again, and your velocity is higher than what the table says for your weight, to which is shown in the BB weight column in the attached table.
So in reality, you should chrono on your playing weight, refer to the chart and then adjust your gas valve or whatever to achieve that velocity which will tie up with the energy value, this takes the error out, as the gas expands when using green gas, propane, HPA, etc. as opposed to mechanically compressed inert gas (air).
I'm still learning about gas guns, so please, any information I have divulged incorrectly, please put me right (in a nice way ?)
View attachment 34573
View attachment 34574
I only used 4 variants of BB weights for my graph, but you can visually see the gaps between each weight, which is the variation in energy applied to achieve the same velocity to the BB weight below it.
To understand it better, you chrono your gas gun on 0.20g to get 350fps (for instance, I know it's not a target), great! Your gun is legal on 0.20g as you get 1.1381J, but then you switch to your preferred playing weight of BB. You then chrono it again, and your velocity is higher than what the table says for your weight, to which is shown in the BB weight column in the attached table.
So in reality, you should chrono on your playing weight, refer to the chart and then adjust your gas valve or whatever to achieve that velocity which will tie up with the energy value, this takes the error out, as the gas expands when using green gas, propane, HPA, etc. as opposed to mechanically compressed inert gas (air).
I'm still learning about gas guns, so please, any information I have divulged incorrectly, please put me right (in a nice way ?)
View attachment 34573
View attachment 34574
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