- Jan 17, 2017
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22LR
Bouncing Bullets off Water in Ultra Slow Motion - The Slow Mo Guys
Bouncing Bullets off Water in Ultra Slow Motion - The Slow Mo Guys
Bouncing Bullets off Water in Ultra Slow Motion - The Slow Mo Guys
- Thread starter mat200
- Start date
And people expect to be able to get that kinda quality with these surveillance cameras LOL.
In case anyone was wondering:
www.phantomhighspeed.com
cost 60,000-80,000$
TMX 7510
The Phantom TMX 7510 Ultrahigh-speed camera utilizes a revolutionary back side illuminated sensor to provide resolution and speed combinations not possible before.
www.phantomhighspeed.com
cost 60,000-80,000$
Just a little difference between a $60,000 camera and a $300 surveillance camera LOL
This was really interesting since they listed the velocities for a couple of shots. They listed it in mph but I need to think in terms of fps so I converted them.
The 22LR (lead round nose, probably a 40gr) was doing 671mph (984fps) just prior to hitting the water. It was doing 469mph (687fps) when it exited the water.
But the 9mm was doing 164mph (240fps) when it hit the glass. That was a FMJ bullet and probably 115 gr, which typically factory ammo for a 9mm will run about 1200pfs at the muzzle and drop maybe 25fps at 5 yards, roughly. Estimating the bullet was doing about 1175fps at water entry. Then the water slowed it down by 935fps in about 30"? That seems very survivable, as it didn't even crack the glass? I always wondered how much damage rounds hitting me under water would have done. Of course, that is a pistol round. Rifle rounds would be going 2.5-3 times faster.
Durning one of the IDPA matches years ago I was the SO for a scenario and caught a .45fmj 230gr. It had ricocheted off a plastic barrel and hit me on the inside thigh. Did not break the skin, or even put a hole in my jeans. Left a bruise though. Wish I knew how fast it was going.
The 22LR (lead round nose, probably a 40gr) was doing 671mph (984fps) just prior to hitting the water. It was doing 469mph (687fps) when it exited the water.
But the 9mm was doing 164mph (240fps) when it hit the glass. That was a FMJ bullet and probably 115 gr, which typically factory ammo for a 9mm will run about 1200pfs at the muzzle and drop maybe 25fps at 5 yards, roughly. Estimating the bullet was doing about 1175fps at water entry. Then the water slowed it down by 935fps in about 30"? That seems very survivable, as it didn't even crack the glass? I always wondered how much damage rounds hitting me under water would have done. Of course, that is a pistol round. Rifle rounds would be going 2.5-3 times faster.
Durning one of the IDPA matches years ago I was the SO for a scenario and caught a .45fmj 230gr. It had ricocheted off a plastic barrel and hit me on the inside thigh. Did not break the skin, or even put a hole in my jeans. Left a bruise though. Wish I knew how fast it was going.
- Jan 17, 2017
- 15,555
- 26,217
The 7.62x39 and 5.56mm rounds fired underwater seem to quickly lose their energy ..
Another great video. The talk about the bubble is all very technically correct. In O&G offshore seismic surveys we used air guns in an array designed to control the bubble oscillations/collapse to be able to remove it from the recorded data.
The bullet only went about five feet since it began tumbling right away. neat.