"Tiger II Trials: Gunnery " Topic
8 Posts
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| Tango01 | 04 Mar 2015 9:01 p.m. PST |
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| wrgmr1 | 04 Mar 2015 10:47 p.m. PST |
Interesting article.
After 58 shots, the semiautomatic guide failed.
After 90 shots, the roller arm failed. Would not be good if theses failed under fire. |
| emckinney | 05 Mar 2015 9:35 a.m. PST |
Permalink: link (The link in the OP goes to the blog home page, so the article will fall off of it in a few days.) |
| emckinney | 05 Mar 2015 9:42 a.m. PST |
Incidentally, "50% radius" is CEP. |
| Tango01 | 05 Mar 2015 10:33 a.m. PST |
Glad you enjoyed the article my friend. Amicalement
Armand |
| BattlerBritain | 06 Mar 2015 5:55 a.m. PST |
Interesting on the firing trials. They used a 4m x 4m target. That's quite big as UK use 3m square. They also corrected: "Correction to aim was made after every shot." To determine accuracy in modern trials they generally wouldn't correct after each shot: they'd use the same aiming point for all shots, bang off 10 rounds and then work out the SD and MPI based on a statistically relevant quantity of shots, ie 10 rounds not 1. Then adjust the guns MPI (aiming point) and shoot again. The MPI and SD are used in calculating the chance-of-hit (there are stats routines to do this). Adjusting after each shot means you're using a different aiming point for each shot. Makes the SD and MPI calcs are real PITA, and also affects the accuracy calcs (how do you measure it accurately?) MPI = Mean Point of Impact
SD = Standard Deviation. |
| BattlerBritain | 06 Mar 2015 7:46 a.m. PST |
Just out of idle curiousity I plugged some numbers in using the firing values for 2000m. For CEP the Russians use a radius value, so at 2000m a CEP radius of 62cm. From p = 0.67449*sigma, sigma = 91cm. Using Military Mils, where 1 MMil = 0.982 milliradians, SD in MMils = 91 x 10.186 / 2000m = 0.468 MMils, ie expressing a constant SD in terms of range. From that I get the following chance-of-hit against a 2.3m square target:
500m : 100%
1000m : 98%
1500m : 82%
2000m : 62%
2500m : 47%
3000m : 36%
3500m : 28%
4000m : 22%
4500m : 18%
5000m : 15% That's assuming no offset for MPI, ie perfectly aligned. Decrease %chance-of-hit accordingly for any MPI errors. |
| Tango01 | 06 Mar 2015 10:38 a.m. PST |
Good work my friend ! (smile) Amicalement
Armand |
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goes to sea with the Terrain Mat.
