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Mailing List Logs for ShadowRN

Message no. 1
From: Rick Mc Leod of the Clan Mac Leod <rxm@****.MDA.COM.AU>
Subject: Wind Resistance on a ballistic projectile...
Date: Tue, 30 May 1995 05:13:26 GMT
Several folks quoted me and completely missed my point...
(one of them anyway...)

Original post from some guy (paraphrased cuz my memory is shot):
>>Wind resistant slows bullet till it is no longer effective...

My response (again paraphrased):
>If you think wind will slow a bullet so that it won't hurt...

Now, the best of these is pretty a good description, but the
7.62mm round has a larger cross-section, and a slower MV
than the .223. Hence, the shorter range. (I can consistently
hit a DC at 400m with an AR-15.) But I digress, my point was
that wind resistance does not significantly reduce the killing
force imparted by the projectile.

In fact, as stated physical trauma will increase if a large
projectile goes subsonic, but that's just not going to happen
with a .223 or .50. The round will ground before it slows
that much -- which leads to -- what are the estimated MV's
or SRII weapons? Are they assumed to be equivalent to the
modern counterpart?

Wind resistance (which varies with temperature, pressure, and
humidity -- i.e fluid density) will disrupt targeting
accordingly...weather conditions are fickle...GM's will have
to decide if the wind is constant or gusting, dry or wet, etc.

Thinking about Seattle though, finding a decent shot at 1,000m
isn't really that easy. Neither is walking around with a rifle
about six foot long...I like things up close aand personal
myself. It the only way to be sure...

Spider
Message no. 2
From: Tim Serpas <wretch@**.COM>
Subject: Re: Wind Resistance on a ballistic projectile...
Date: Tue, 30 May 1995 03:05:43 -0500
On Tue, 30 May 1995, Rick Mc Leod of the Clan Mac Leod wrote:
> I like things up close aand personal
> myself. It the only way to be sure...
>
> Spider
>

I'm sorry, that's incorrect. <aawww> Yes, the correct answer /is/:

Nuke them From Orbit.

Thank you, we have some lovely parting gifts for you...
<cue cheesey game show music...>
<cue :-) for the humor impared>

Tim Serpas :Geek Code v.2.1: GS d- H++>+++ s:- !g p1 auVW a- w+ v+ C+
BS Physics : U P? !L !3 E---- N++ K++ W M- !V -po+ Y+>++ t+ !5 j+>$
wretch@**.com: R+ G'' tv+>! b+>++ D+ B-- e++>-- u+ h- f+>* r++ n+ y+
Message no. 3
From: Andy Austin <gaustin@****.VOICENET.COM>
Subject: Re: Wind Resistance on a ballistic projectile...
Date: Tue, 30 May 1995 15:39:49 -0500
>Original post from some guy (paraphrased cuz my memory is shot):
>>>Wind resistant slows bullet till it is no longer effective...

I believe that I said Wind resistance slows a bullet till it has a much
lower chance of killing the intended target. (Or something like that, I
didn't save my post. Your welcome to post my whole statement again, but I
don't believe that that is neccesary.)

>My response (again paraphrased):
>>If you think wind will slow a bullet so that it won't hurt...
>
>Now, the best of these is pretty a good description, but the
>7.62mm round has a larger cross-section, and a slower MV
>than the .223. Hence, the shorter range. (I can consistently
>hit a DC at 400m with an AR-15.) But I digress, my point was
>that wind resistance does not significantly reduce the killing
>force imparted by the projectile.

Unfortunately, you missed my point. I was not refering to an AR-15, but a
Barretta .50 caliber. Also, I was refering to long range shots. At the
Barretta's extreme range, a sniper has many different forces acting
against him. He must cope with wind resistance that _does_ slow the bullet
down until the round has a velocity that is much slower than when it was
fired. At arouund six kilometers range, a Barretta has a much lower chance
of killing. It will probably still penetrate, and _will_ hurt whomever it
hit, but does significantly reduce the impact force. As a sidenote, the
Barretta's bullet has a high intial velocity, and can maintain that speed
out to about two kilometers, but the velocity falls off quickly as a result
of air resistance. A .50 caliber round is more than 200% larger than a 5.56
mm round. In my initial post, I was oversimplifing the factors that a
sniper has to deal with so that the game would be simpler.

Andy Austin

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