The Accuracy % in German Firing Tables

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Miles Krogfus
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The Accuracy % in German Firing Tables

Post by Miles Krogfus » 21 Feb 2017 02:53

For an example use FT H.Dv. 119/327 of the 7.62 cm Pak 36 firing 7.62 cm Pzgr 39 rot, 7.6 Kg and 710 m/s:
the FT gives accuracy % when firing at a target of 2.5 meters Breite and 2 meters Hohe. Thus at 2000 meters range, divide 2.5 by 1.4 (=1.786) then divide 2 by 1.8 (=1.111). Using a German firing table's "Tafel der Wahrscheinlichkeitsfaktoren" look up 1.8 = 78%, and 1.10 = 54% and multiply .78 and .54 which equal 42% accuracy at that range. For double scatter of the AP increase 1.4 Breite to 2.8 and Hohe 1.8 to 3.6. Thus obtain .893 (.90 or 46%) multiplied by .555 (.55 or 29%) or 13%. (Note that the person computing the FT's % either took .43 times .29 OR .46 times .26 and lists 12%).
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Eax-E
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Re: The Accuracy % in German Firing Tables

Post by Eax-E » 21 Feb 2017 15:49

Hello,

Thanks, it's a very interesting reasoning. In my opinion the so designed % accuracy is not a good indicator on the ground but is usefull to benchmark the different weapons.

Best regards

Miles Krogfus
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Re: The Accuracy % in German Firing Tables

Post by Miles Krogfus » 21 Mar 2017 22:32

The Tafel figures obtained gave German AT and Panzer crews approximate figures to help guide them as to what range to open fire on various objects and how much ammo to use up (for example, with limited ammo left, hold fire until . . .).

Yoozername
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Re: The Accuracy % in German Firing Tables

Post by Yoozername » 18 Apr 2017 21:28

Eax-E wrote:Hello,

Thanks, it's a very interesting reasoning. In my opinion the so designed % accuracy is not a good indicator on the ground but is usefull to benchmark the different weapons.

Best regards
The German gunners were given abbreviated 'fold-outs' and even 'slide-outs' that gave them an overall percentage (4 out of 10, 8 out of 10, etc.) based on a hand full of common ranges (and they would lump together weapons also, that is Pak 40, KWK 40, 7.62 cm Pak 39), and also targets (Churchills, Shermans, matilda, etc.)

The math above is primarily based on a 'T34' type stationary target, with the low height being the over-riding 'math' up to 1000 meters or so. Since most weapons are tighter in width dispersion, and most AFV wider in width, it should be apparent that height is critical. I never really got the whole double-dispersion as being very good.

The numbers in the first accuracy depend on knowing the range. And having a zeroed weapon. As range increases, the more critical it is to know the range. And harder to guesstimate.

That firing table is for the later war 2.45 Kg propellant armor piercing round.

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