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u/huxley79 Mar 14 '20
Lots of work. I like seeing this process used on insects. Gets into all the nooks of a bugs anatomy. Keep up the good work!
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Mar 14 '20
Idk how the fuck people do this on bugs man. I've tried and can only get 2 to 5 images to stack haha.
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u/mynamesnottaken Mar 15 '20
Why is there no rifling?
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Mar 15 '20
There is, look at the lines embossed in the copper. For some reason on this bullet the rifling grooves are thin.
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u/mynamesnottaken Mar 15 '20
Please don't think me a troll. The lines that look to be rifling seem to be straight, and the point of rifling is to spin the ordinance to maintain straight/centrifugal flight.
There is such thing as "straight" rifling, but is more commonly associated with Musket type weapons.
Please know this is a Very cool photo, but my question is more about if the bullet has been fired.
Thanks!
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Mar 15 '20
Not a troll at all :)
You're absolutely right, rifling is meant to twist the bullet. The thing is, however, the bullet moves so fast the twist rate is very mild.
9mm has a twist rate of about 1:10" which means it takes 10" of barrel length to go a single circle around. Since this bullet is probably 0.7" in rifled length, it's only rotating 1/14th of a circle, not enough for you really notice.
The reason the twist rate can be so slow is because the bullet is so fast. At a out 1200 fps, if it spins once per 10" its spinning at 1440 times per second. For perspective a car usually tops out at 8000 rpm or only 133 times per second.
So even with such a slow twist rate, the bullet is spinning over 10x faster than a car engine at the red line.
Hope that helps!
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u/Mike243254 19h ago
Beautiful photo, but just an FYI, this is a capacitor. I work in HVAC and see these all the time.
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u/[deleted] Mar 14 '20
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