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Welcome New Members / Re: New member intro« Last post by mr007s on April 22, 2024, 11:12:22 PM »Howdy
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PCP/CO2/HPA Air Gun Gates "The Darkside" / Re: Increase FPE by 70% with Helium? The AirForce Texan HE Experiment!« Last post by Scotchmo on April 22, 2024, 11:11:14 PM »All this extra power and velocity is great, but what I want to know... Does it make your rifle any lighter? Yes. My ELR rifles with the 2L bottle would be about 1.5 lbs lighter if filled with helium, rather than air. 24
PCP/CO2/HPA Air Gun Gates "The Darkside" / Re: Increase FPE by 70% with Helium? The AirForce Texan HE Experiment!« Last post by Back_Roads on April 22, 2024, 11:08:21 PM »And to squirrels talk funny when you shoot them with it?I have only tried it on Chipmunks 25
PCP/CO2/HPA Air Gun Gates "The Darkside" / Re: Increase FPE by 70% with Helium? The AirForce Texan HE Experiment!« Last post by Scotchmo on April 22, 2024, 11:06:32 PM »Hey guys, I know it's an old post but just for the sake of posterity, and if I'm not mistaken, I believe the increased velocity with helium has more to do with the faster speed of sound in helium versus in HPA. Maximum flux is limited by the speed of sound. So, yes, constant density air cannot “flow” faster than the speed of sound. However, air can also expand at approximately the speed of sound. So even if the column of air moving into the barrel reaches the speed of sound relative to the port, expansion can also happen at the air column front (behind the projectile). Given a barrel with enough length, or a projectile with a low enough mass, the velocity will approach the actual limit which is roughly 2x the speed of sound. The higher speed of sound in helium gives it a higher maximum velocity limit, but the gains that we see in a typical airgun charged with helium are mostly due to the lower mass of the helium. 26
German AirGun Gate / Re: rws 34p fair selling price« Last post by billet1951 on April 22, 2024, 11:05:22 PM »Thanks for the advice guys
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Welcome New Members / Re: New member intro« Last post by ezman604 on April 22, 2024, 10:54:35 PM »Welcome to GTA Forums Pierre!!!
SAFE & Happy Shooting!!!! Dave 28
Back Room / Re: So if you didn't do anything airgun related what did you do today?« Last post by Madd Hatter on April 22, 2024, 10:53:04 PM »Went back to the lake and caught some more bass.I haven't been fishing in decades 😔. Use to fish a lot before I got married. 29
Crosman-Benjamin Air Gun Gate / Re: Benjamin Discovery« Last post by Rabbit\Squirrel Killer on April 22, 2024, 10:51:03 PM »So I was browsing today and found a really nice condition Discovery in 22 cal. Blue Book says 80%= $150 and 100%= $230 30
Back Room / Re: You are an airgun addict when« Last post by Rick67 on April 22, 2024, 10:45:01 PM »555. You’re seriously considering controlled neurotoxin application on yourself (think spider venom that causes paralysis) to up your offhand game ….and are mastering acupuncture for the very same purpose Only one way to find out, Ernie sir 😂 |