4 ms·

> “When a bullet is in flight for that long, you have to take into account the rotational speed of the earth. What you’re shooting at isn’t going to be in the s

> “When a bullet is in flight for that long, you have to take into account the rotational speed of the earth. What you’re shooting at isn’t going to be in the same place it was 24 second ago when you pulled the trigger.” Wow. Impressive work! I also noted the pitch differential between scope and barrel :O

rabi_molar 4y ago
It's essentially a little bit similar to a mortar shell launch I suppose, at that distance? Reminds me of the fun I had trying to do ultra long distance shots playing Gunbound (South Korean MMMORPG that was similar to Worms) online. Very impressive.
sbaiddn 4y ago
Impressive, indeed [1], but its the easiest of the corrections they had to do. Its a standard classical physics question and has been included in artillery calculations since at least the late 19th century. [1] Id imagine that a bullet, being so light compared to a shell, is more affected by fluid flow than the coreolis force. That the correction was needed means they nailed the far more difficult fluid problem.
- chroma 4y ago
  Coriolis deflection is a rounding error compared other sources of inaccuracy. In their press release[1] they said they didn't account for it: > Scott made the wind and elevation call of 1,092 MOA up and 17 MOA left. (In our original release, I forgot to include that we added a 36 MOA left mechanical wind adjustment at the beginning of the day for a total of 53 MOA for the hit. Our calculation for spindrift was 93.80” right) We did not take into account the Coriolis, as much of that is lost in the weeds with respect to wind (6-9 mph), temperature rising (constantly adjusting elevation) and time of flight. The bullet’s flight path is over 2500 feet above line-of-sight and there is a lot going on up there that we are unable to predictably compensate for. If it had been an absolutely dead-calm day it definitely would be one more variable to try to address. MOA stands for minute of angle, which is 1/60th of a degree, so a 1,092 MOA adjustment is 18.2 degrees. It's insane that they managed to hit the target. 1. https://nomadrifleman.com/world-record-shot/ https://nomadrifleman.com/world-record-shot/
teaearlgraycold 4y ago
https://www.youtube.com/watch?v=tXVcXmyKpeI https://www.youtube.com/watch?v=tXVcXmyKpeI > At this distance you'll also have to take the Coriolis effect into account. COD did it first
vitaflo 4y ago
Military snipers in training will practice at a mile+ and take the Coriolis Effect into account (or at least be trained to). Though they'll tell you the likelihood of getting one-shot one-kill is pretty low once you go past a mile of range.

rabi_molar 4y ago

It's essentially a little bit similar to a mortar shell launch I suppose, at that distance? Reminds me of the fun I had trying to do ultra long distance shots playing Gunbound (South Korean MMMORPG that was similar to Worms) online. Very impressive.

sbaiddn 4y ago

Impressive, indeed [1], but its the easiest of the corrections they had to do. Its a standard classical physics question and has been included in artillery calculations since at least the late 19th century. [1] Id imagine that a bullet, being so light compared to a shell, is more affected by fluid flow than the coreolis force. That the correction was needed means they nailed the far more difficult fluid problem.

chroma 4y ago
Coriolis deflection is a rounding error compared other sources of inaccuracy. In their press release[1] they said they didn't account for it: > Scott made the wind and elevation call of 1,092 MOA up and 17 MOA left. (In our original release, I forgot to include that we added a 36 MOA left mechanical wind adjustment at the beginning of the day for a total of 53 MOA for the hit. Our calculation for spindrift was 93.80” right) We did not take into account the Coriolis, as much of that is lost in the weeds with respect to wind (6-9 mph), temperature rising (constantly adjusting elevation) and time of flight. The bullet’s flight path is over 2500 feet above line-of-sight and there is a lot going on up there that we are unable to predictably compensate for. If it had been an absolutely dead-calm day it definitely would be one more variable to try to address. MOA stands for minute of angle, which is 1/60th of a degree, so a 1,092 MOA adjustment is 18.2 degrees. It's insane that they managed to hit the target. 1. https://nomadrifleman.com/world-record-shot/ https://nomadrifleman.com/world-record-shot/

teaearlgraycold 4y ago

https://www.youtube.com/watch?v=tXVcXmyKpeI https://www.youtube.com/watch?v=tXVcXmyKpeI > At this distance you'll also have to take the Coriolis effect into account. COD did it first

vitaflo 4y ago

Military snipers in training will practice at a mile+ and take the Coriolis Effect into account (or at least be trained to). Though they'll tell you the likelihood of getting one-shot one-kill is pretty low once you go past a mile of range.