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      Special Upgrade 4 Tech Tips   12/27/2016

      Hi all! Now that Upgrade 4 is out and about in large quantities we have now discovered a few SNAFUs that happen out in the scary, real world that is home computing.  Fortunately the rate of problems is extremely small and so far most are easily worked around.  We've identified a few issues that have similar causes which we have clear instructions for work arounds here they are: 1.  CMRT Windows customers need to re-license their original key.  This is a result of improvements to the licensing system which CMBN, CMBS, and CMFB are already using.  To do this launch CMRT with the Upgrade and the first time enter your Engine 4 key.  Exit and then use the "Activate New Products" shortcut in your CMRT folder, then enter your Engine 3 license key.  That should do the trick. 2.  CMRT and CMBN MacOS customers have a similar situation as #2, however the "Activate New Products" is inside the Documents folder in their respective CM folders.  For CMBN you have to go through the process described above for each of your license keys.  There is no special order to follow. 3.  For CMBS and CMFB customers, you need to use the Activate New Products shortcut and enter your Upgrade 4 key.  If you launch the game and see a screen that says "LICENSE FAILURE: Base Game 4.0 is required." that is an indication you haven't yet gone through that procedure.  Provided you had a properly functioning copy before installing the Upgrade, that should be all you need to do.  If in the future you have to install from scratch on a new system you'll need to do the same procedure for both your original license key and your Upgrade 4.0 key. 4.  There's always a weird one and here it is.  A few Windows users are not getting "Activate New Products" shortcuts created during installation.  Apparently anti-virus software is preventing the installer from doing its job.  This might not be a problem right now, but it will prove to be an issue at some point in the future.  The solution is to create your own shortcut using the following steps: Disable your anti-virus software before you do anything. Go to your Desktop, right click on the Desktop itself, select NEW->SHORTCUT, use BROWSE to locate the CM EXE that you are trying to fix. The location is then written out. After it type in a single space and then paste this:

      -showui

      Click NEXT and give your new Shortcut a name (doesn't matter what). Confirm that and you're done. Double click on the new Shortcut and you should be prompted to license whatever it is you need to license. At this time we have not identified any issues that have not been worked around.  Let's hope it stays that way Steve
    • Battlefront.com

      Forum Reorganization   10/12/2017

      We've reorganized our Combat Mission Forums to reflect the fact that most of you are now running Engine 4 and that means you're all using the same basic code.  Because of that, there's no good reason to have the discussion about Combat Mission spread out over 5 separate sets of Forums.  There is now one General Discussion area with Tech Support and Scenario/Mod Tips sub forums.  The Family specific Tech Support Forums have been moved to a new CM2 Archives area and frozen in place. You might also notice we dropped the "x" from distinguishing between the first generation of CM games and the second.  The "x" was reluctantly adopted back in 2005 or so because at the time we had the original three CM games on European store shelves entitled CM1, CM2, and CM3 (CMBO, CMBB, and CMAK).  We didn't want to cause confusion so we added the "x".  Time has moved on and we have to, so the "x" is now gone from our public vocabulary as it has been from our private vocabulary for quite a while already.  Side note, Charles *NEVER* used the "x" so now we're all speaking the same language as him.  Which is important since he is the one programming them
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imported_WARHAMMER

most accurate ally AFV?

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as was said above, one reason the panther is so accurate was because of the 75mm's high velocity and longer barrel than the mark IV.

thus why the sherman 75 is SO different than the sherman 76 and firefly.

fireflys seem to never miss when they are shooting at me smile.gif

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I find it interesting that the Firefly is so accurate in CMBO according to the reports above.

In RL the muzzle blast from the 17pdr was so massive that it blinded the crew and they couldn't see where the round hit.

While this wouldn't effect the initial shot accuracy it would not help in adjusting for the next round so it's a good job they seem to hit first time then!

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Combat mission models accuracy as simply a function of velocity. Which while generally true is not the only factor.

Aside from gunner skill to actually lay the gun on target accuracy is a function of

velocity, windage, manufacturing tolerances.

So your most accurate weapon will be the largest gun with the highest muzzle velocity and the best manufacture.

On the allied side the 17pdr had a high MV of 878ms and a heavy shot of 7.71kg (verses 7kg for the comparible American round) When firing the APCBC round this gun was very accurate. First use of this gun came as a shock for the Germans, when some Tigers which had been standing off at 1500m from British positions suddenly starting catching fire.

The American 76mm APC (tungsten) round was at close range the most accurate of all WWII projectiles. This had a high MV but poor density, at longer ranges the light projectile slows considerably and is effected by wind.

In theory the best projectilewas the 17pdr APDS in the game this is the most accurate round. However manufacturing tollerances require for APDS were not yet understood, and consquently some rounds were wildly inaccurate. The muzzle break on the 17pdr also disturbed the breaking off of the sabot, which is why modern tanks don't have muzzle breaks.

Post war APDS was and still is very accurate since it has high velocity, high density (less wind effects) and good manufacturing tollerances.

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AODS is said to be extremly unaccurate due to uneven discarding of parts.

BTW, people keep telling me there is a chance in the 17pdr's accuracy in some month in CMBO, but I am not able to reproduce that. Which month is that supposed to be and what are the exact conditions?

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I don't have stats, but the Sherman 75mm HE round was reputed to have a high degree of accuracy on soft targets. It also likely kept it up over a longer span than did the high-performance guns.

Lower muzzle velocity can equate to less barrel wear over time, and this is something we frequently overlook about the big blasters - they get inaccurate fairly quick. Admittedly, the life expectancy of tanks was not as great as artillery pieces, but one does wonder about shell wander due to barrel wear.

For it's primary intended use, i.e. taking out soft targets, the 75 was not a bad weapon.

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