Question:
When I see footage of tracer rounds going off from turrets in (I think) in bombers, the glow of the round looks all spikey when it flies away. Does it look this way from all angles, or just from the gunner's perspective? What causes this effect?
Answers:
old footage. their recording back then was not as good as todays.
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I think perhaps some gun cameras would shake in their mounts from the guns firing while the film was rolling. It wouldnt take too much movement to effect the bright glowing tracer light on a film.Theres lots of footage that show the tracers flying straight and not all squiggley like you describe.Just my thought.
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The tracer goes straight in the usual way, it's the camera that's bouncing around. You can experience the same effect by chewing something crunchy while looking at a fluorescent display, like the clock on some microwaves, it looks like it's bouncing around but it's just an odd optical effect.They look like streaks of green/red/white whatever the chemical composition is. Coming at you, my experience was they seem slow in the distance, then zip by.
The squiggly/spikely appearance is due to vibration of the camera, or focus issues.
(Turrets didn't have gun cameras. What you're seeing are gun cameras on fighters. Or, a handheld camera run by a crewmember/newsreel.)
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What you have seen is a combination of recoil vibrations and optical illusion due to the difference in aircraft and tracer vectors.The hot-line gun sights available for modern fighters, when the gun is the selected weapon, incorporates this illusion into their visualization.
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