Originally posted by Bruno
It doesn't matter as the figures on the site you linked and those that Toad posted are the same:
1 inch = 25mm
.9 inch = 23mm
However, .50 cal tank 'busters' are just as much 'fantasy' as Rudel's 518 'busted' tanks.
Destroying a battletank with .50 cal MGs was little more than wishful thinking.
Nonetheless, while a single .50 cal BMG round will not likely penetrate the deck armor of a battle tank, the errosive effect of being hit by hundreds of rounds can, eventually, penetrate the lighter upper deck armor of most WWII tanks. Odds still remain high that this would not occur, simply because such a concentration of fire was very unlikely. However, virtually every extenal piece of hardware can be damaged or destroyed. Lights, pintle guns, periscopes, tools, rubber road wheels and the like are susceptable to gunfire. Rounds occasionally finding their way into the engine compartment can disable the tank long enough to eliminate its immediate effectiveness.
However, support vehicles such as trucks, half-tracks and scout vehicles such as armored cars were far easier to destroy with gunfire. Indeed, self- propelled artillery was quite vulnerable to .50 caliber AP rounds.
Generally speaking, most battle tanks lost to fighter-bombers were the result of direct hits from bombs and rockets. Yet, even that was relatively uncommon. Most tanks not destroyed in fights with enemy armor were abandoned due to running out of fuel, or were disabled and could not be repaired due to a lack of supporting men and equipment.
As it was, Allied control of the air over the battlefield was such that any attempt to repair or recover disabled tanks had to be done under the cover of darkness. For the Germans, getting armor to the front was the biggest problem, as the railroads were prime targets. I've seen several photos of tanks lying upside down along rail lines, having been blown off of flat cars by bombs.
I guess in this respect, Aces High is accurate. Strafing tanks with .50 caliber MGs may knock off a track. Maybe even knock out the engine. However, it will require a bomb or rocket hit to destroy a tank in the game.
My regards,
Widewing