Actually to my understanding the flaps of the Spits and Hurris were only used for landing. Unsurprisingly because they really destroy any speed quickly. They are rather airbrakes than high lift devices considering their angle at which they are exposed to the air stream. For the seafire they used a trick to lock shortly and only once per flight the flaps to a halfway position for takeoff.

I checked 109 sea level speeds and nothing change comparing to pre beta patch version.

109 E-3 (manual prop)/ E-4 auto prop

1.35 Ata at 2400 RPM - 450 kph at 0
1.45 Ata at 2500 RPM - 460 kph at 0

So i think there is no changes in FM of 109 ( also there is no info about it in beta patch notes). So still 109 is to slow ab. 20 km/h at 1.3 Ata power and ab. 20 km/h at 1.4 Ata - so generally 40 km/h slowier at the deck.

Moreover i checked british fighters in beta patch and i got:

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 at deck at 6 1/2 lbs
285 mph at deck at 9 lbs ------ should be 286-290 mph so it is very accurate result!!!!

Still no 100 octan fuel performance - so no emergency +12 lbs.

P.S.

Test was made in the same map and settings over channel at near sea level, i checked different RPM settings, radiator etc. for all fighters and choose the best ones to achive the best results.

strange....I just couldn't get the mk2 spit above 240 mph at sea level

Do you use some kind of level-flight aid or just a very steady hand? I would like to test at FTH as well but I have trouble keeping it within +/- 50m.

Trimm trimm trim and steady hand plus watch vario + above 10 years flying sims + 8 years real life flying + ab. 3 years flight model modding and testing in il2 :)

Are you sure it is MKII not MK1?? Cause i cant get MK1 above 240 mph at sea level - max speed 238 mph at 6 1/2 lbs.

SRY i made mistake in these post cause i miss Hurricane with SPitfire. Of course SPit MK1a in beta patch reach 255 mph at 6 1/2 lbs and Spitfire MKII reach 268 mph at the same boost.

I will check again, sounds like thats what happened.

Of course, this is only used for landing in RL.
But in the game, some (less experienced) red pilot use the landing flap to tight turn :rolleyes:. Of course small angular velocity can be obtained for a short time, but the speed dropped fast - even before the patch too. Now the consequences is much more drastic.

Kwiatek, did you make those tests off line or on line? Just curious because on line at 100 feet off Manston we couldn't get more than 248mph in Spit MkIa. Not that 8mph matters when its so far off.

Is there any way to check the atmosphere settings for on and off line? Is one or neither a 'standard day'?

Hi Klem,

Here's what I got yesterday for the Spit Ia at sea level:

6.5 lbs, 2800 rpms: 245 online, 249 offline
6.5 lbs, 3000 rpms: 252 online, 253 offline