Speed graphs for Spitfire and Hurricane

[Kwiatek]

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.

[bongodriver]

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

[Kwiatek]

Originally Posted by bongodriver

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

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.

[bongodriver]

Originally Posted by Kwiatek

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.

I will check again, sounds like thats what happened.

[klem]

Originally Posted by Kwiatek

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.

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'?

[ATAG_Snapper]

Originally Posted by klem

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

[CaptainDoggles]

Originally Posted by ATAG_Snapper

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

Did you try offline at 3000 RPM? Comparing different RPM settings is rather counter-intuitive.

[ATAG_Snapper]

Originally Posted by CaptainDoggles

Did you try offline at 3000 RPM? Comparing different RPM settings is rather counter-intuitive.

I don't understand your question. Both online and offline are there, for two rpms. What's so "counterintuitive" about that?

[Insuber]

Originally Posted by ATAG_Snapper

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

May I ask how does it compare with historical test data?

[ATAG_Snapper]

Originally Posted by Insuber

May I ask how does it compare with historical test data?

Hi Insuber,

Top speed for the Ia at sea level should be 283 IAS at full overboost at 3000 rpms (before the engine blows up LOL). If the boost control cut out functioned as it should in this sim and provided another short-term emergency speed boost of 25 mph, (253 + 25 = 278 mph), we'd actually be within 5 mph of Real Life data. IMHO, of course.