Author Topic: Is bullet drag calcualted in game?  (Read 1513 times)

Offline Vinkman

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Is bullet drag calcualted in game?
« on: March 18, 2013, 02:22:56 PM »
Do rounds fired from machinge guns slow down in game due to drag? If so does anyone have a table of measured data showing velocity at distance travelled for the guns in game?

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Offline Lusche

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Re: Is bullet drag calcualted in game?
« Reply #1 on: March 18, 2013, 02:27:11 PM »
Yes, no.

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Offline bustr

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Re: Is bullet drag calcualted in game?
« Reply #2 on: March 18, 2013, 02:35:26 PM »
Is this what you are looking for?



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Offline Vinkman

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Re: Is bullet drag calcualted in game?
« Reply #3 on: March 18, 2013, 02:53:08 PM »
Is this what you are looking for?


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Yes! thanks Buster.  :salute

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Offline SmokinLoon

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Re: Is bullet drag calcualted in game?
« Reply #4 on: March 18, 2013, 02:54:25 PM »
HTC has modeled trajectory and velocity, yes.
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Offline Vinkman

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Re: Is bullet drag calcualted in game?
« Reply #5 on: March 18, 2013, 03:00:51 PM »
HTC has modeled trajectory and velocity, yes.

Trajectory yes (gravity has a big effect.) But I wasn't sure if they modelled drag, or assumed the speed doesn't change much to matter over bullet range in game (1500 yds).

I'm wondering what the terminal velocity of a MG round in game is. I believe they disapear at 1500 yrds. What I wanted to further understand was how much the damage value of a MG round changes with distance. This would be a function of it's speed. From buster's Table I can calculate the Drag and hence the terminal velocity. From that I could calculate the drop in damage as a function of the drop in Speed.

This goes back to my original question which, I now assume to mean the damage and velocity change over time and distance travelled.
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Offline Sunka

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Re: Is bullet drag calcualted in game?
« Reply #6 on: March 18, 2013, 03:02:24 PM »
HTC has modeled trajectory and velocity, yes.
Wish they would add wind sheer from prop ect, and other wind forces,then players could not do the BS 1k shoots in AH.
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Offline Lusche

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Re: Is bullet drag calcualted in game?
« Reply #7 on: March 18, 2013, 03:02:35 PM »
I now assume to mean the damage (...) change over time and distance travelled.


Against player objects (planes and GV) yes, against ground structures no.
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Offline Vinkman

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Re: Is bullet drag calcualted in game?
« Reply #8 on: March 18, 2013, 03:09:52 PM »

Against player objects (planes and GV) yes, against ground structures no.

Thanks Lusche. Have you done the calculations on MG damage/distance? I have been wondering about it for a long time with respect to the other (potential) advantage of cannons which is most of the damge is done by the explosion so they lose less of their damage effect over distance than MG do.  Let's say at 100 ft it takes one 30mm, or 20 .50 cals to knock a wing off, at 1500yrds it still takes one 30mm but 40 .50cals.   

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Offline Lusche

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Re: Is bullet drag calcualted in game?
« Reply #9 on: March 18, 2013, 03:12:13 PM »
No, because I don't have any means to test it.
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Offline Rob52240

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Re: Is bullet drag calcualted in game?
« Reply #10 on: March 18, 2013, 03:24:01 PM »
I would imagine that bullets follow the same physics in AH as GV guns.  Put two tanks far enough apart while they're exchanging fire and hear one of them gripe about how many hit sprites his tiger caused on a M4 or an M4 driver laughing over how many times he's been hit without taking damage.
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Offline icepac

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Re: Is bullet drag calcualted in game?
« Reply #11 on: March 18, 2013, 03:24:46 PM »
I wonder if it can be tested with a p51 saddled on a b17 rear gunner and slowly coming forward as it fires?

You just compare the range of the rear guns vs the fighter pursuing.

Online Wiley

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Re: Is bullet drag calcualted in game?
« Reply #12 on: March 18, 2013, 03:25:47 PM »
Wish they would add wind sheer from prop ect, and other wind forces,then players could not do the BS 1k shoots in AH.

They do disperse.  With the sheer volume of rounds we fire, you're pretty much guaranteed to get a ridiculously long range kill every once in a while.

Vinkman- Just because you mentioned cannons having 'most of' their damage as chemical.  If memory serves, cannon rounds do exactly the same damage at the muzzle as they do at range.  Velocity doesn't affect cannon round damage in any way, only MG round damage.  Although, typing that out just now makes me wonder, does a cannon round with the aircraft doing 0mph do the same amount of damage on a stationary target as a cannon round with the aircraft doing 300mph?

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Offline BaDkaRmA158Th

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Re: Is bullet drag calcualted in game?
« Reply #13 on: March 18, 2013, 05:12:03 PM »
Even a cannon round moving faster would help the damage done, most fuses had a delay so after penetration then the round would blow up.

Unless in the case of the round over penetrating and blowing up on the other side of the target, in this case just a really really big hole.  :rock
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Offline SmokinLoon

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Re: Is bullet drag calcualted in game?
« Reply #14 on: March 18, 2013, 05:32:50 PM »
Even a cannon round moving faster would help the damage done, most fuses had a delay so after penetration then the round would blow up.

Unless in the case of the round over penetrating and blowing up on the other side of the target, in this case just a really really big hole.  :rock

Not always.  Some cannon warheads did not have TNT in them and were only meant to splinter apart upon any medium thicker than air.  We can get in to the nitty-gritty all we want, but my guess is that HTC modeled the damage the same regardless if the impact is at 200 yards or 1000 yards for cannon HE rounds. 

 
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