bikeman564™ Posted October 4, 2023 Share #1 Posted October 4, 2023 by watching this video Link to comment Share on other sites More sharing options...
Razors Edge ★ Posted October 4, 2023 Share #2 Posted October 4, 2023 5? 1 Link to comment Share on other sites More sharing options...
Kzoo Posted October 4, 2023 Share #3 Posted October 4, 2023 42 1 Link to comment Share on other sites More sharing options...
maddmaxx ★ Posted October 4, 2023 Share #4 Posted October 4, 2023 High. 1 Link to comment Share on other sites More sharing options...
jsharr ★ Posted October 4, 2023 Share #5 Posted October 4, 2023 I am not smarter. Way over my head. 1 Link to comment Share on other sites More sharing options...
Razors Edge ★ Posted October 4, 2023 Share #6 Posted October 4, 2023 FTR, I feel like those pre-dated use by cyclists. I know they were (still are) used for BB/pellet guns, and I remember seeing them as a kid around job sites. What was their original purpose? And what genius thought, "This is perfect for bike tires"? 1 Link to comment Share on other sites More sharing options...
bikeman564™ Posted October 4, 2023 Author Share #7 Posted October 4, 2023 1 minute ago, Razors Edge said: What was their original purpose? I'd say guns, but its a guess. Link to comment Share on other sites More sharing options...
maddmaxx ★ Posted October 4, 2023 Share #8 Posted October 4, 2023 7 minutes ago, bikeman564™ said: I'd say guns, but its a guess. winner. 1954 Originally developed and the trademark owned by Crosman Corporation and introduced to the market in 1954, the Powerlet CO 2 cartridge has become the dominant source of power for inexpensive, rapid fire air guns from many manufacturers. 1 Link to comment Share on other sites More sharing options...
Razors Edge ★ Posted October 4, 2023 Share #9 Posted October 4, 2023 1 minute ago, maddmaxx said: winner. 1954 Originally developed and the trademark owned by Crosman Corporation and introduced to the market in 1954, the Powerlet CO 2 cartridge has become the dominant source of power for inexpensive, rapid fire air guns from many manufacturers. When I was a kid, that's why I liked my Crossman pump BB/pellet gun. No way I could afford to be replacing those cartridges! 1 1 Link to comment Share on other sites More sharing options...
maddmaxx ★ Posted October 4, 2023 Share #10 Posted October 4, 2023 However the op question can't be answered because of other data not given. What's the temperature of the gas inside the cartridge. What's the volume of the cartridge Like Schroders cat we can't know the pressure inside the cartridge because due to the low volume some pressure will be lost filling the pressure gauge to read what will then be the pressure in the cartridge and the gauge combo. Link to comment Share on other sites More sharing options...
jsharr ★ Posted October 4, 2023 Share #11 Posted October 4, 2023 8 minutes ago, maddmaxx said: winner. 1954 Originally developed and the trademark owned by Crosman Corporation and introduced to the market in 1954, the Powerlet CO 2 cartridge has become the dominant source of power for inexpensive, rapid fire air guns from many manufacturers. https://www.pyramydair.com/blog/2022/04/a-short-history-of-the-co2-airgun/ Link to comment Share on other sites More sharing options...
Razors Edge ★ Posted October 4, 2023 Share #12 Posted October 4, 2023 6 minutes ago, maddmaxx said: However the op question can't be answered because of other data not given. What's the temperature of the gas inside the cartridge. What's the volume of the cartridge Like Schroders cat we can't know the pressure inside the cartridge because due to the low volume some pressure will be lost filling the pressure gauge to read what will then be the pressure in the cartridge and the gauge combo. That's nowhere near as precise as @Kzoo's answer. Link to comment Share on other sites More sharing options...
Razors Edge ★ Posted October 4, 2023 Share #13 Posted October 4, 2023 4 minutes ago, jsharr said: https://www.pyramydair.com/blog/2022/04/a-short-history-of-the-co2-airgun/ Interesting. I will also stress the that anyone buying their CO2 from a bike shop is wildly overpaying. Head to Walmart and the BB gun aisle and get them dirt cheap. 12gram works perfect for road bikes, and a couple of 12gm is more than adequate for a gravel bike. Link to comment Share on other sites More sharing options...
maddmaxx ★ Posted October 4, 2023 Share #14 Posted October 4, 2023 2 minutes ago, Razors Edge said: Interesting. I will also stress the that anyone buying their CO2 from a bike shop is wildly overpaying. Head to Walmart and the BB gun aisle and get them dirt cheap. 12gram works perfect for road bikes, and a couple of 12gm is more than adequate for a gravel bike. However, as soon as you get home, vent the tire and refill it with seasonal air. CO2 leaks through the tube and the tire self deflates . 1 Link to comment Share on other sites More sharing options...
Razors Edge ★ Posted October 4, 2023 Share #15 Posted October 4, 2023 Just now, maddmaxx said: However, as soon as you get home, vent the tire and refill it with seasonal air. CO2 leaks through the tube and the tire self deflates . Yep - they start going soft immediately. Not sure how much is from leakage vs the math stuff in the video having an impact too. Link to comment Share on other sites More sharing options...
maddmaxx ★ Posted October 4, 2023 Share #16 Posted October 4, 2023 3 minutes ago, Razors Edge said: Yep - they start going soft immediately. Not sure how much is from leakage vs the math stuff in the video having an impact too. There's something about the makeup of the Co2 molecule and the rubber in the tube being permeable to it. Link to comment Share on other sites More sharing options...
Thaddeus Kosciuszko Posted October 4, 2023 Share #17 Posted October 4, 2023 I can't believe we're sixteen posts into this and nobody has mentioned the picture hanging in the background. It's the grid! I gotta get me one of those. 1 Link to comment Share on other sites More sharing options...
bikeman564™ Posted October 5, 2023 Author Share #18 Posted October 5, 2023 16 hours ago, maddmaxx said: However the op question can't be answered because of other data not given. What's the temperature of the gas inside the cartridge. What's the volume of the cartridge Like Schroders cat we can't know the pressure inside the cartridge because due to the low volume some pressure will be lost filling the pressure gauge to read what will then be the pressure in the cartridge and the gauge combo. He cut a cartridge open and measured the volume. The gas temperature would be equal to ambient temperature. Link to comment Share on other sites More sharing options...
Razors Edge ★ Posted October 5, 2023 Share #19 Posted October 5, 2023 12 hours ago, Thaddeus Kosciuszko said: I can't believe we're sixteen posts into this and nobody has mentioned the picture hanging in the background. Wait...there's a video???? Link to comment Share on other sites More sharing options...
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