User Panel
Posted: 11/22/2018 10:09:19 AM EDT
I see a lot of bullet drop compensation computations but cant recall seeing a bullet rise computation.
With gravity being less effective at really high altitudes above sea level (10k' or more), I would think that we should have a book to help shooters account for this. |
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Gravity is always working so bullets are always falling. They don’t rise.
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Space shuttle door gunners have this info. If it's not classified, I'm sure one would be glad to send you a copy.
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First reply nailed it. There is less air friction at higher elevations, but very little difference in the pull of gravity.
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Post whore post. I want to see how this evolves into flat earth logic.
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Do you even physics? Acceleration due to gravity is a constant. View Quote View All Quotes View All Quotes What happens in real life does not always correlate to what the guy in the wheelchair tells us it is |
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Are you shooting with, our against the rotation of the earth?
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With gravity being less effective at really high altitudes above sea level (10k' or more) View Quote |
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Muh thuddy thuddy will cut thru trees, don’t need to account for squat
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Holy shit, why just yesterday I was at 11,000 feet scoping big rams and thought ....
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Acceleration of gravity does vary a little at different locations on the earth, something like 32.0 ft/sec/sec to 32.4 ft/sec/sec.
But the thinner air of higher elevation should make a more noticeable difference. The bullet will lose less velocity as it travels because of less air molecules it has to push through. |
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The guy in the wheelchair? I think you are looking for the guy who got hit in the head by an apple.
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Transition of the moon over its ecliptic?
Aliens? Shooter flapping too much? |
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Quoted: Im giving you a double What happens in real life does not always correlate to what the guy in the wheelchair tells us it is View Quote Bullets will hit slightly higher, but it has zero to do with gravity. |
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It’s cold at elevation.
Bullets are hot out of the barrel. Heat rises. |
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Don’t you have mice to masturbate? You should stick with to that. View Quote View All Quotes View All Quotes |
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While 10,000 feet makes no difference on ballistics as far as gravity is concerned it makes you wonder about the ballistics in zero g.
If you shoot a bullet in space would it have a flat trajectory? |
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This thread is turning into gold. OP should post more so I can laugh more.
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Altitude doesn't change it much at all, shooting angle is a different story though.
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While 10,000 feet makes no difference on ballistics as far as gravity is concerned it makes you wonder about the ballistics in zero g. If you shoot a bullet in space would it have a flat trajectory? View Quote |
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g (at altitude) = 9.8 * 6371^2/(altitude+6371)^2 View Quote So you'd need to do the whole square of the distances and gravitational constant calculation Again air density has more impact than any gravity difference. |
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He probably saw one of those Earth gravity charts with the pretty colors but failed to notice the difference is in the hundredths of m/s2.
And actually at higher elevations you have more mass beneath you so there is MORE gravity.... |
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With gravity being less effective at really high altitudes above sea level (10k' or more) I don't think it's significant enough to be applied to what the op is talking about though. |
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First reply nailed it. There is less air friction at higher elevations, but very little difference in the pull of gravity. The bore axis can cross the sight axis but that is factor of sight alignment. |
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Quoted: Altitude and being on a mountain are two different things. The mountain has mass. You would really need to include the mass in the equation to do it right. So you'd need to do the whole square of the distances and gravitational constant calculation Again air density has more impact than any gravity difference. View Quote I do agree with your second point and would more than likely make a sea level chart, then go shoot at altitude and see the difference and find the ratio and adjust accordingly. |
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