Quote:
Originally Posted by Champagne
As the years have rolled by and SP is updated and patched to where it is today, has this updating included updating the data that was originally input to simulate the dynamics of projectile vs armor plate and other like aspects of tactical war from this period of history?
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You can easily change it yourself to fit what you think is "best".
WW2_APCalc.exe (for paid users) lets you "shoot" the weapons in the OBATs and returns the typical and "best, 1 in a million shot" penetration chances for that weapon at that range.
You can then adjust the weapon stats in the OBATs as to what you think is correct.
As for penetration stats themselves...the internet and the wider spread of information (google books and other methods) have made it possible for someone to gain access to more information than were available in the prehistoric past of 1992-1993.
Thompson F-Formula Penetration Calculator
ARMET-TR-17002 Linear Velocity Decay Calculator
You can use these small Javascript browser programs I developed to calculate likely penetration stats for whatever fantasy weapon you develop (or for obscure WW2 weapons which little data is available on).
Like, for example, what would a hypothetical Japanese Tank Destroyer developed by the IJN mounting the
15.5 cm/60 3rd Year Type naval gun be like?
You could use the Linear Velocity Decay Program to input the relevant weapon stats:
155mm diameter
55.87 kg shell
925 m/sec muzzle velocity
2000m striking range
And using the default 0.841 Derived K Constant from ARMET-TR-17002; you'd get a striking velocity of 808.355 m/sec at 2000 meters.
Then running to the Thompson F-Formula Calculator; you'd plug in the relevant data.
(Side note, I calculated that the F-Factor of the Soviet 76.2mm F-34 gun was 1.318 -- that probably holds true for Japanese weapons as well.)
Doing
155mm diameter
55.87 kg shell
808 m/sec muzzle velocity
0 deg striking angle
1.318 F-Factor
We get:
220.250mm penetration at 2km range.
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EDIT: The accuracy of the above estimate can be checked by going to the
Type 3 75 mm tank gun Wiki and noting:
75mm diameter
6.6 kg projectile @ 680 m/sec muzzle velocity
65mm penetration at 1,000m
Cranking the numbers in the Linear Velocity Decay calculator (and using std 0.841 Derived K Constant) gets us a striking velocity of 564.408 m/sec.
Running back to the Thompson F-Formula calculator, we get with all the numbers:
75mm diameter
6.6 kg projectile
564.408 m/sec striking velocity
1.318 F-Factor (using Soviet F-Factor)
And we get 69.5mm penetration. Not bad for a SWAG on how well made Japanese AP projectiles were.