Why still no dive acceleration difference?

[BlackBerry]

Originally Posted by AndyJWest

So now you want TD to rewrite the physics modelling because of something that "Someone told" you... ?

If you can provide verifiable evidence that IL-2 is wrong, do so. But bear in mind that even if you do, this is a ten-year-old game, and is hardly likely to undergo a substantial rewrite that would make little practical difference in terms of relative aircraft performance - at lest, from the evidence I've seen so far. IL-2 gets it wrong at high Mach numbers: but this isn't news. It seems to be fairly consistent in the 'wrongness' anyway, so why worry about it...

As for CloD benefiting from the work, do you have any information at all regarding how this entirely new simulation models such things?

"Someone" is a man involved in il2 mod developing.

As for relative aircraft performance, if your Tempest MKV(9lbs) get caught by a la7@3000m altitude with same speed, could you just dive in a 60 degree angle to the ground (<720Km/h)and simply get far away from la7 shooting range and then come back to 2500m with a much better "energy saving" zoom ? No, in my experience, you can't achieve that. How could those light--2.5 tons--tiny aircraft--smaller 3-blade ClarkY prop.---la7 dive with same accelaration as a 5-tons-huge aircraft-much bigger 4-blade prop. Tempest MKV?

When TempestMKV/La7 dives to 720km/h=200m/s=0.59Mach on the deck, what's the efficiency?
la7 Shvetson M-82FN 14 cyl. with 2-stage supercharger and direct fuel injection rated at 1,850 hp at 2,500 rpm. VISh-105V-4 3 bladed controllable-pitch metal prop of 10.17 ft (3,10 m) diameter

only 2400-2500rpm engine, merely 3.1meter prop, I don't know the reduction ratio but let's assume 1350rpm for propeller. We know 3-blade 1350rpm 4m Hamilton efficiency is 77% or so at 0.59Mach @ low altitude. Advance ratio for Hamilton=2.22, advance ratio for la7 VISh-105V-4=2.87. wow, 2.87? this ratio is for P47 @0.77Mach.

It's very reasonable for la7 to get only 50% efficiency in this situation. La7 loses extra 35% efficiency? lost 650HP? A piece of Sh*t for La's high speed diving. This soviet monster shows his weakness, haha.

I just suspect 10-year-old il2 FM how to treat prop efficiency. If "someone" tell me what formular il2 uses in FM, everything will be clear.