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Old 2010-07-11, 02:16   Link #101
SaintessHeart
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Join Date: Nov 2007
Age: 35
Quote:
Originally Posted by ZeKeR View Post
LULZ mode activate!!!

thats why that the SVD's scope has a little something in its crosshair, tho i forgot what that name was.
Quote:
its range is THAT far but i cant say for accuracy tho. unless reki uses an intervention rifle THEN she can reach 2km.

if kinji can do what he did in the first chapter of the LN and manga, it can be plausible that he can also be a spotter.

a rule of the sniper is for ambush and support. at first i mistook her for a sharpshooter tho. those two are different things.
You mean the curved markings on the left? It is called a rangefinder. The 7.62mm x 54mmR is said to have similar ballistics to its 7.62 x 51mm NATO counterpart, with just a slightly larger punch due to its extra mass that allows it have more K.E.

Snipers and sharpshooters are the same. Snipers and designated marksmen, however, are the two different ones. The SVD is meant and built for DMs, not snipers, that's why it is given a semi-auto function.

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and if i remember something, the calculation for the sniper (the spotter if its two man) is:

bullet compensation
wind speed
Coriolis effect
angle
variable distance/range
When you mentioned Coriolis Effect, I knew you had just read everything off the net with no formal thought given into kinematics and dynamics.

1. Compensation is given to the mass of the bullet causing bullet drop AND parallax errors, not just the bullet itself.

2. Wind speed alters a bullet's flight path. Having a larger bullet mass helps to counteract it in breezes and ranges below a click. Both the Warsaw and NATO 7.62mm rounds can hit stuff at 300 metres without taking into account wind speed (unless it's very strong), anything beyond that you have to do your calculations and adjustments.

3. Elevation is only used for anything up to anything half a click above sea level and a range above half a click. 7.62 rounds can fly straight further than you think.

I have no idea which variable angle/distance you are talking about, and I will let you figure out Coriolis Effect on your own with this equation :

Fc = -2mω X Vr


where
Fc = Coriolis Force
m = mass of bullet
ω = angular velocity of earth
X = vectorial product
Vr = muzzle velocity of bullet

ω is based on the latitude position of the spot you are sniping from on Earth. It depends on which position you are shooting from, towards the South, the bullet would shift West due to Earth's spin. And taking Newton's Law of Gravitation into account, the Inverse Sqaure law applies.

From my calculations, even with a really long ranged bullet like the 20mm, I seriously doubt the Coriolis effect will be needed to be taken into account because with a powerful enough scope of up to 10x magnification and some experience of shooting stuff over a click, the deviation of the bullet due to Coriolis effect would be less than a metre at a range of 2 clicks.

The Coriolis effect seems to be used more for artillery and mortar.

Quote:
Originally Posted by Angrypokstick View Post
i have no real experience with any sniper training. but from what i know of basic marksmen ship principles and the theory of gunnery you learn as a tank gunner this is pretty much what the fire control computer calculate for you after you lase a target.
If only sniper weapons have fire control computers...but that would require a superpowerful processor because the bullet dynamics are so radically different as compared for tank guns. The numbers dealt with are like 1000,000 times smaller.
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