Wow I wouldn't believe you said this had I not read it for myself . Exactly how do you think they should be able to HIT a flying plane ? If they could don't you think that an AA round would be part of standard load for MBT ? Do you think that a tank main gun can even track one ? Do you think that the optics are designed to do this ? The question is not if the round could damage a plane it is could it even come close ? Almost as ridiculous as the 4.2 inch AA rounds developed for mortars . Yes the chain in the round and the blast could have an effect . It is just not probable that they could be made to intentionally share the same air space .
Once again you ignore the optics and the ability to track . How do you propose that you acquire the target ? Next ask me how I know this .(hint real life experience)
Grizz my friend I don't care what angle is used where attack comes from . The optics and Traverse and elevation systems on tanks cant do it . You cant acquire and you can't track an A/C . This is not theoretical knowledge on my part .
Granted.. in WW2 they rarely, rarely had a chance to shoot at a plane attacking them with the main gun.. But, who knows, they may have. In the jungles of the PTO, the Japanese soldiers were instructed to blindly fire their guns straight up into the air through the canopy of trees with the hopes of hitting enemy aircraft buzzing overhead. One confirmed case of this actually working is documented in the book ''The Jolly Rogers" by Tom Blackburn
Point is, a tank hurls projectiles through the air. Airplanes occupy air. Airspace is limited and it is quite possible that 2 masses will attempt to occupy this same space at the same time. A long time ago Newton said this is a no-no and, to this day, people are still failing to disprove this law.
I believe the targeting algorithm is
TLAR ( That looks about right )
Some people are better at it than others... just as some people are better at attacking bombers than others.. Takes practice and learning. As does the method of attacking GVs. I've been towered by main guns, just as I have towered others. ( Still love putting a SB shell through a flight of tree hugging Lancs a few years back..
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Unless you want to change the code to say that large calibre shells fired from GVs or Shore batteries have no effect on aircraft, I don't see a way around it. And, even then, that doesn't sound realistic. If your plane is trying to occupy the same space as a 75mm chunk of steel, the collision should register.