Nice!
i’m now going to use those numbers and put the 2S38 onto a BR axis where 9040C (10.0) is the zero line and HSTV-L (11.3) is the maximum.
for sake of brevity i’m going to show how i’m going about it once and then just show the results.
after the results i’m going to add all together and divide by number of tested factors to get an average (which should in theory give us the optimal BR for the 2S38 going only by the accounted for characteristics).
(Information about math here as well):
Acceleration (0-50km/h in seconds):
HSTV-L - 2S38 - 9040C
7-14-17
subtract the lowest number from all gets us:
0-7-10
turning it backwards (where needed) and converting the numbers to represent a normal axis progression (if the high number does not become 10 i convert by taking the 2S38 result divided by the HSTV-L result and multiplying the answer with 10 to get the axis placement for the 2S38)
0-3-10
putting BR 10.0 (9040C) as the zero and using a ten step divide to the BR 11.3 (HSTV-L) gives us 1.3/10=0.13 per step so multiplying the 2S38 axis placement by 0.13 gives us the BR it should be at going by every specific characteristic (per mathematical custom i’m not going to round to the actual BR numbers until last step, but i am rounding to the nearest hundredth to make it easier and look nicer). the 2S38 is in this instance 30% (3 steps) above the 9040C meaning 0.39 above giving it a rounded BR of 10.4 going by acceleration alone.
10.0 - 10.39 - 11.3
(for 0-60 calculated the same way turns into)
10.0 - 10.80 - 11.3
(average for category is 10.60)
so doing this for the rest of the numbers (with some corrections shown where needed):
APFSDS
munition mass:
10.0 - 10.31 - 11.3
flat penetration at 100m
10.0 - 10.92 - 11.3
60 degrees (not using your 60 to flat conversion as that will muddle up the calculation and instead using the values from in game at 100m which are: 155 - 128 - 97mm):
10.0 - 10.69 - 11.3
(Average for category: 10.64)
I will not use the APCBC as both 9040C and HSTV-L does not have one, instead adding the AA round and their characteristics which the HSTV-L does not have (making the lack thereof a disadvantage for self-defense against helicopters and jets).
Proxy round
i will use the average percentage of better round qualities as a multiplier for the 0.13 BR steps.
qualities used:
Speed of round, mass, mass of explosive (TNT equivalent), fragmentation penetration at 10m and trigger radius (feel free to comment on the way i did this).
Number above 10.0 for each:
0.13, 0.41, 1.07, 0.84, 0.87
Average: 0.66
BR result: 10.0 - 10.66 - 11.3
(i will argue it would place it a bit higher since the lack of proxy round does more than just that mathematical increase, but will use it for now)
Magnification/FOV:
here i will multiply the numbers of the FOV to get an area and use the zoom level difference.
Magnification:
10.0 - 10.39 - 11.3
FOV:
negligible area difference, will exclude going forward, but worth noting that 2S38 is slightly better than both.
Turret traverse:
(will use data from Wiki and RB - ACE crew for now) in deg/sek.
57 - 60 - 34.9
Here the 2S38 is better than both so lands outside the axis.
10.0 - 11.3 - 11.48
Fire rate, it gets progressively worse so calculated this backwards to see where it would land, (not sure here if this is correct, will exclude from final result but worth noting the difference):
HSTV-L - 2S38 - 9040C
10.0 - 11.0 - 11.3
Paragraph got long, about survival, no math
i will add that the 2S38 has no crew in its turret which gives it an edge as the tanks are built to peak over hills and only expose the turret as much as possible. this makes the 2S38 way more survivable in those situations, outside this they are probably very close in survival.
the only thing more i would add for survival is that the 2S38 has way more empty space inside (and thus has less things that create spalling), so if you don’t hit the right spot (kill/injure crew or ammo) it will have a way easier time to shoot back at what shot it and ultimately survive. if the HSTV-L gets hit you usually hit at least something to slow it down (one crew and perhaps injure another) because it has way more internal things that are spread out that can get hit. the 9040C does however have a spall liner to combat this.
Total:
i have done the average for each category separately as to not favour one category more than others so all acceleration have been averaged by themselves and then added to the total average division (so ammo pen and mass are added together into one average first and same with acceleration).
Adding all of the BR results together and dividing it by the number of categories measured we get:
11.48(turret traverse)+ 10.39(optics)+ 10.66(AA round)+ 10.64(ammo/pen)+ 10.61(acceleration)=53.78
divided by the 5 categories for an average of:
53.78/5=BR 10.76 (10.80 if fire rate is included)
this would result in an adjusted rounded BR of 10.7.
I am also curious about how you came to this conclusion:
When the average i get to for penetration and round mass is BR 10.64 (rounded to 10.7).
counting ONLY pen at 100m and 100m 60 degrees it averages out to (10.69+10.92)/2=10.81 (rounded to 10.7)
so how did you get to 10.3 going only by penetration?
