Analysis of real life 109E performance for CloD

[Kwiatek]

Originally Posted by robtek

I believe there is a general error in the game engine with the calculation of the athmospheric density or something like that, causing the problems above 7000 m and MG is now trying to fix that with FM changes.

That will never work, imo

If they cut sea level speed for british fighters (and now they are way too slow) it would affected also for speed at higher alts. It looks that most British fighters are too slow about 40 km/h at all alts - and thats only for 87 octan fuel performacne. So how it could work????


"Hurricane MK 1 Rotol

238 mph /383 kph at the deck at +6 1/2 boost ------ should be 262-265 mph /420-426 kph !!!!

So it is 24-27mph/ 38-43 kph too slow at + 6 1/2 boost power !!!!

There is no WEP - so no 100 octan fuel performacne - which should give ab. 25 mph/ 40 kph extra speed at low alts

Spitfire MK1a

255 mph/410 kph at the deck at 6 1/2 boost ---------should be 283 mph/455 kph !!!!

So it is 28 mph/45 kph too slow at 6 1/2 boost.

No 100 Octan fuel performance at all - boost cut out doesnt rise power at all.

Spitfire MK II

268 mph/431 kph at deck at 6 1/2 lbs
285 mph/458 kph at deck at 9 lbs ------ should be 286-290 mph so it is quite accurate result!!!!

No emergency take off power +12 lbs included."


and

Originally Posted by camber

109E4 (prop pitch control on)

FTH: 5000m (boost has dropped a bit to 1.32ata, declines rapidly above 5000m)

425kmh IAS@5000m = 569kmh TAS, exactly right for Messerchmitt official average spec.

Spit Ia

FTH = 16500 ft
at 6.25psi, 2750rpm (rad open) engine fails after about 3 minutes. Just enough time to get stable 245mph IAS (with 3000rpm couldn't get this alt without engine death)

245mph IAS@16500ft = 323mph TAS = 520 kmh TAS

Oh dear, this is under even B6 plot speed (560kmh TAS at 16500ft).

Spit IIa

FTH = 13500 ft (?!)
at 6.25psi, 2750rpm (rad open) engine fails after about 3 mins

260mph IAS@13500 = 328mph TAS = 528 kmh TAS

I really hope I making some kind of testing error here. Tried online and got same values. I wouldn't feel confident taking any Spit against 109s at alt with these values.

camber

For 109 speed curve is much more close to RL data ( RL 467-475 km/h at 1.3 Ata at the deck and 570 km/h at 5 km). 109 is only about 20 km/h too slow at low level and deck.

Il2 CLOD is successor of IL2 1946 if some things could be possible to achive in old Il2 i dont belive it is not possible to achive in CLOD.