Russian Heavy AT weapon - deviation and scope (v0.973)
(Outdated)
(Outdated)
This thread contains a lot of bullshit that you wouldn't waste your time on. Skip to the conclusion and take a look at some of the pictures and their description. The rest is basically documentation
After being on the forums watching several threads, the only thing about the weapon I seemed to find was reality comparisons and how the scope is so broken while the only constructive conclusion I found was that the non-zeroed center cross-hair oddly enough is at the center of your screen like all other AT weapons in the game except SPG-9. (Tip: To find the center of your screen (which I often need) press Q (comm-rose), and the middle circle will give you an accurate idea of where you'll shoot.)
So I spent 5 hours documenting 116 shots on the Russian airfield in Silent Eagle on a local server (good times).
This is the result in coordinates (you're not supposed to read it xD):
50 meters
(0,0;1,0) (-0,3;-0,1) (-0,5;0,1) (-0,2;0,1) (3,5;0,7) (-0,3;0,8 ) (0,0;0,0) (0,0;-0,1) (-0,5;0,0) (0,0;0,1) (-0,1;0,1) (-2,0;0,0) (-0,1;0,0) (-0,2;-0,2)
100 meters
(-0,1;0,0) (-0,3;0,4) (-0,1;-1,8 ) (-0,8;-2,5) (-0,6;-0,5) (-0,4;-0,2) (0,0;-0,1) (-0,3;-0,3)(0,0;0,0) (0,4;1,1) (0,1;0,0) (-0,5;-3,2) (-1,5;-2,0) (-0,2;-0,1)
150 meters
(-0,3;0,0) (-0,1;1,0) (0,8;-1,6) (0,7;-1,9) (1,0;-1,5) (0,4;-1,2) (-0,3;-0,2) (0,4;-1,2) (0,0;-1,3) (-0,9;-0,2) (-0,5;-2,3) (-0,6;-1,5) (-0,2;-1,9) (0,3;0,1)
200 meters
(-0,1;-2,2) (-0,4;-1,4) (0,6;0,1) (1,1;-1,0) (-0,3;-0,1) (-0,5;-2,5) (1,4;-1,0) (-0,3;-1,5) (0,3;-2,0) (-0,3;0,0) (-1,5;-1,2) (-0,6;-0,4) (1,0;-1,0) (-0,3;0,2) (0,3;-1,5) (0,5;-2,3)
250 meters
(0,3;-2,0) (-0,7;-1,8 ) (-0,2;-0,9) (-0,9;-1,9) (0,5;-0,4) (-1,2;-1,4) (-0,1;-2,3) (0,9;-1,2) (0,2;-2,7) (-0,1;-2,9) (0,2;-2,2) (0,2;-0,6) (-0,1;-1,0) (0,0;-1,2) (0,2;-2,4)
300 meters
(-0,3;-1,3) (0,2;-1,8 ) (0,5;-2,5) (-0,4;-2,7) (-0,5;-2,1) (-0,6;-2,8 ) (-0,6;-0,9) (-0,4;-1,7) (-0,6;-1,5) (-0,3;-2,0) (-1,1;-0,9) (-0,2;-2,0) (-0,8;-1,5) (0,7;-2,7) (-0,1;-2,9)
350 meters
(-0,8;-2,0) (0,7;-3,1) (-0,6;-2,0) (0,2;-3,5) (-1,2;-0,5) (-0,8;-1,4) (0,0;-2,4) (0,1;-2,4) (0,5;-4,1) (-1,3;-2,6) (-0,1;-2,7) (-0,2;-1,5) (0,4;-3,6) (-0,3;-2,7)
400 meters
(0,0;-2,6) (-0,5;-3,1) (-0,8;-3,4) (-1,1;-4,0) (0,4;-2,2) (0,4;-2,8 ) (0,9;-2,3) (0,2;-3,4) (-0,3;-3,0) (0,5;-1,7) (-0,5;-2,4) (0,4;-1,1) (-0,3;-3,6) (0,6;-2,9)
The coordinate system is based of the center of the scope, and the size of its units is based on the scope's markers:
Test was executed under following conditions:
- All shots were fired from 'standing' position.
- Scope was held completely still in 10 seconds before each shot
- Target distance was accurately measured from the map. Not in 50 m intervals or with rangefinder/GTLD.
- Almost all shots were fired at vertical flat surfaces, aka. a building. (except the 50 m tests)
- Coordinates was estimated by eye (not measured) from the scope. (recoil has been taken to account and countered)
Processed data:
50 m:
Data count: 14
Average coordinate: (-0,6;0,2)
Deviation x: [-2,0;3,5] difference: |5,5|
Deviation y: [-0,2;1,0] difference: |1,2|
100 m:
Data count: 14
Average coordinate: (-0,4;-0,7)
Deviation x: [-1,5;0,4] difference: |1,9|
Deviation y: [-3,2;1,1] difference: |4,3|
150 m:
Data count: 14
Average coordinate: (0,1;-1,1)
Deviation x: [-0,9;1,0] difference: |1,9|
Deviation y: [-2,3;0,1] difference: |2,4|
200 m:
Data count: 16
Average coordinate: (0,1;-1,1)
Deviation x: [-1,5;1,4] difference: |2,9|
Deviation y: [-2,5;0,2] difference: |2,7|
250 m:
Data count: 15
Average coordinate: (-0,1;-1,7)
Deviation x: [-1,2;0,9] difference: |2,1|
Deviation y: [-2,9;-0,4] difference: |3,3|
300 m:
Data count: 15
Average coordinate: (-0,3;-2,0)
Deviation x: [-1,1;0,7] difference: |1,8|
Deviation y: [-2,9;-0,9] difference: |3,8|
350 m:
Data count: 14
Average coordinate: (-0,5;-2,5)
Deviation x: [-3,3;1,0] difference: |4,3|
Deviation y: [-4,1;-1,1] difference: |3,0|
400 m:
Data count: 14
Average coordinate: (0,0;-2,8 )
Deviation x: [-1,1;0,9] difference: |2,0|
Deviation y: [-4,0;-1,1] difference: |2,9|
All distances:
Average x-value: -0,2 (x-value should be independent of distance/bullet-drop)
Deviation x: [-3,3;3,5] difference: |6,8|
Highest y- value over center/y=0: 1,1
About processed data:
"Data count" refers to the amounts of documented shots were fired at each range
"Average coordinate" is the SUM of all x and y values for the specific distance divided by "Data count"
"(max) Deviation" show the lowest and highest x and y value. Difference is the the difference between lowest and highest.
Deviation
Now to the more interesting part. Visualizations. This is where I show you how this weapon has a worse spread than a shotgun. All coordinates are edited into into the pictures below as red dots, while the yellow cross shows the average coordinate for that distance. The target is centered at the average coordinates. (again, this is not how the test was made. The shots were fired at a building. See: "Test was executed under following conditions")
As you see, at 150 m the chances that you're going to hit a tank with its side to you with just one of your 2 shots is getting quite small (57%), even though you're aiming at it ideally.
Another quite ironic picture, I used the maximum x and y deviations to determine that distance where you'd definitely hit the target. All max dimensions were lined up to the tank except the ballistic dimention (-y). Waited 10 seconds... and baam, the RPG dives right for the ground at the 250m mark..
??:
Ballistics
Here I placed the 'average coordinates' (yellow crosses) in relation to my understanding of the ballistic indicators at the time (red). Yellow lines cut through the points to keep your focus on vertical placement.
Last picture:
This picture above shows a compromise between the scope's design and my data.
An important detail to note here is that the cross-hair is moved left (x=-0,2). During the testing, it was very visible that rockets tended to fly left of the center. But surprisingly the average x-value was only -0,2. (see 'Processed Data' - 'All Distances')
Conclusion
I may have created a ballistic scope up to 400 m, but I'll after this day never shoot that far. People in these forums say; "don't shoot farther than 500 m" some say 300 m. I say; don't shoot over 100 m as the weapon's effective range seems to be some what below 100 m. Everything else is a losing gamble with your ammo.
But when I shoot with it from now on, I'll be aim slightly right as shown on the picture above.
In fact.. I'd advice you to run up, hug the tank and fire point-blank at it (unless the rocket decides to turn 180 deg in the other direction. You never know.) Don't worry, the RPG has no AT-arm time. It's armed when it leaves the pipe and damages the tank right on. And you wouldn't take damage unless the tank (or whatever) explodes as the RPG does no explosive damage when impacting within 10 m. After 10 m however, the RPG does explosive damage with approximately a 5 meters blast range. So the RPG cannot damage you, but work with full AT-potential at any range.
Comments: I'd probably need to have more data to make the 'average' scope markers and altitude indicators more general/correct. But I think there's more than enough data to give a good picture of how unreliable the weapon is. Maybe I'd've (xD) made more accurate results if I was prone. But I was shooting about an hour before i started documenting data, and it made me the impression that prone was just as inaccurate as standing.
People!, it's not the scope which is the problem. No scope can cover this weapon's random behavior.
There's not mystery enough with the German kit to fuel that urge to get answers xD
