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See Through Suppressor in Super Slow Motion (110,000 fps) - Smarter Every Day 177
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All the comments and stories posted to Hacker News that reference this video.Very cool experiment and excellent writeup!You can also do some meta-analysis with all of the high speed video on YouTube. Get something like Tracker[0] to watch the barrel displacement while the bullet is travelling down the barrel. This video from SmarterEveryDay [1] provides some good examples.
I've watched tons of these vids and my basic observation is that there is some motion while the bullet is in the barrel, but as soon as it leaves you basically are left with a rocket trying to launch into the shoulder of the shooter. Even at high frame rates there's a perceivable increase in rearward acceleration once the gases start escaping.
Looking forward to future articles! Particularly with the improved accelerometer, it feels like there's a story in the gaps. I'm sure you've got plenty of ideas when you start a blog with that name, but here are a few I've been mulling about while chasing a lawnmower around the yard (some of these may be tired stories for folks into match shooting).
- Benefit of powder sorting for uniform and/or even distribution of grain size/weight (maybe via sieve or some kind of scattering method?)
- Benefit of tip conditioning in terminal ballistics (e.g. precision shaping/polishing)
- Building a press + strain gauge to push bullets through barrel to characterize impact of variations in diameter/length on energy required to make the trip.
Last bit of spam from me. I did take a quick peek at the data. It looks like the area under curve measurement more closely correlates with velocity than peak pressure, but not by much. Not sure what the data column on the left represents in the PTC file.