Have you considered the recoil from the projectile? With a muzzle velocity of 370 m/s, and a projectile that weighs about 0.16 kg, the cannon itself will accelerate backwards, reaching a speed of over 40 km/h if the cannon weighs 5 kg. I've done some research on air cannons, so if you have any questions regarding the physics involved, please ask.
@mazken13 Yeah I have already calculated the recoil, the cannon weighs 17kg by the way. I'm still undecided on whether I will hold it and fire it or if I will fire it off the ground. I have a 130g steel ball bearing that I will try and fire before then and see how I cope with the recoil. Recoil with a 100g projectile is manageable but 150g might be a whole 'nother story. Thanks for the offer, I will let you know if I need any help with the physics side of things.
@MrCrowley45 I've fired 160g projectiles out of the TBMA, and it's no problem if you hold the cannon tightly against yourself and brace for the recoil.
@CanadianPyro1 Think i'm going with a remote firing for the MiniBoy, Mobile Chernobyl convinced me that the MiniBoy isn't worthy of being fired from the hip at an estimated angle, plus I think it'd be cooler using the wireless ignition haha. You're not worried about 160g projectiles and your barrel at 10x mixes? Though It'd probably be fine; even in the event of a failure. The S/S barrel gives me reassurance, as after I shoot 150g projectiles I'll try 180g then 200g handheld if all goes well.
@MrCrowley45 MC is likely correct; it would be much better to set the cannon up at a fixed angle for the MiniBoy launch. As for my barrel, I've never fired a 160g projectile at >7X, so I can't confirm whether or not it would survive 10X. Your stainless barrel should be usable at 10X with even very heavy rounds.
fuck yeah, intelligent logical conversation on the internet, dont see that everyday.
really excited to see little boy fly, penetration tests would be saweet
eatingjif 2 months ago
Have you considered the recoil from the projectile? With a muzzle velocity of 370 m/s, and a projectile that weighs about 0.16 kg, the cannon itself will accelerate backwards, reaching a speed of over 40 km/h if the cannon weighs 5 kg. I've done some research on air cannons, so if you have any questions regarding the physics involved, please ask.
mazken13 3 months ago
@mazken13 Yeah I have already calculated the recoil, the cannon weighs 17kg by the way. I'm still undecided on whether I will hold it and fire it or if I will fire it off the ground. I have a 130g steel ball bearing that I will try and fire before then and see how I cope with the recoil. Recoil with a 100g projectile is manageable but 150g might be a whole 'nother story. Thanks for the offer, I will let you know if I need any help with the physics side of things.
MrCrowley45 3 months ago
@MrCrowley45 I've fired 160g projectiles out of the TBMA, and it's no problem if you hold the cannon tightly against yourself and brace for the recoil.
CanadianPyro1 3 months ago
@CanadianPyro1 Think i'm going with a remote firing for the MiniBoy, Mobile Chernobyl convinced me that the MiniBoy isn't worthy of being fired from the hip at an estimated angle, plus I think it'd be cooler using the wireless ignition haha. You're not worried about 160g projectiles and your barrel at 10x mixes? Though It'd probably be fine; even in the event of a failure. The S/S barrel gives me reassurance, as after I shoot 150g projectiles I'll try 180g then 200g handheld if all goes well.
MrCrowley45 3 months ago
@MrCrowley45 MC is likely correct; it would be much better to set the cannon up at a fixed angle for the MiniBoy launch. As for my barrel, I've never fired a 160g projectile at >7X, so I can't confirm whether or not it would survive 10X. Your stainless barrel should be usable at 10X with even very heavy rounds.
CanadianPyro1 3 months ago