[FC99]

Originally Posted by mayshine

FC99 do you know the drag formular?

I am working on it and found some problem in the speed.

I shall propose the result after double check


the formular is

Drag force (air friction to plane itself)

Drag= air drag coefficient*0.5*air density*air speed^2*wing demension

air drag coefficient should be the result from the lab and in Il2 data

can you just use the digit provided in Il2 software data?

coz your team are easier to dig out the date encoded

and see the difference in my simplified model between planes

(m*g-drag)/m

FWA5 0,0236
La5 0,025

Why don't you just work backwards and calculate how much different planes should be for separation after dive to meet your expectations.
BTW how big the difference should be in your opinion after 2000m vertical dive?

Originally Posted by BlackBerry

The heavier a/c is, the more ability of retaining high speed which is above a/c's maximum level speed.

If everything else is equal.

In P51-zeke's test, they just did a shallow dive and then zoomed up. The zoom's beginning speed must be lower than 325PMH IAS.


At first, they zoomed up from cruising speed,that was 210MPH IAS=250MPH TAS, when P51d reach 130MPH=150MPH TAS, zeke was 90m lower. So how much kinetic energy was spent to get altitude?

0.5(250^2-150^2)= 20000

If they begin from 325MPH IAS=389MPH TAS

0.5(389^2-150^2)= 64410

We assume that there is a linear relationship between "kinetic energy" and P51D's zoom advantge to "damaged" zeke52.

So this time, p51d should be 3.22*90=290metres higher.


That is to say, when p51d @325MPH IAS@10000ft, and find a (lightly damaged) zeke on his 6 with same altitude and speed. And the distant between them are 450 metres. P51D may try a zoom, and will probably (450+290)=740m higher than zeke when p51d's speed drops to130 MPH IAS.

Surely 740m is enough for avioding being hit by zeke's cannon.

Distance between them will not be converted into altitude and if P-51 zoom at 90deg up as you suggested previously A6M5 will just cut the corner, use more energy efficient maneuver , close the distance to P-51 and in the end it will have nice fat P-51 close and slow right in its gunsight.

Happens online all the time.

Perhaps, p51d will gain sth.300meters advantage over 109 by starting a high speed (450MPH IAS)zoom, who knows? You can not simply deny that possibility.

Maybe, maybe not. Anyway, question is not about couple hundreds meters, it's obvious that some expects lot more than that. When you are slow on top of the zoom and enemy is 300 m behind you you are dead meat, more often than not and when that happens, it's not the problem with the game physics, it's pilot's error, as simple as that.