Spit IIA Speed in game test

[5./JG27.Farber]

Originally Posted by Ernst

Hello Ivank!

I made some tests for the 109 until 4000m (1.3 ATA and around 2280 RPM, rads open). I do not tried the Spits because i am not used to it. I am assuming an error in speed of +-10Km/H and in altitude of 50 meters. The following results:

100m/sea level: 410 km/h IAS
1000m: 420 Km/H IAS
2000m: 430 Km/H IAS
3000m: 430 Km/H IAS
4000m: 410 Km/H IAS

You doing it wrong. At 100m's I get 460 Km/H IAS at 1.3 Ata and at 5km's I get 420 Km/H at 1.3 Ata...

I have tracks if you want them.

[ATAG_Snapper]

Originally Posted by 5./JG27.Farber

You doing it wrong. At 100m's I get 460 Km/H IAS at 1.3 Ata and at 5km's I get 420 Km/H at 1.3 Ata...

I have tracks if you want them.

No need for tracks from you, Farber, AFAIC. As with IvanK, if you say it is, then it is.

[5./JG27.Farber]

Thats going in my sig...

[Ernst]

Originally Posted by 5./JG27.Farber

You doing it wrong. At 100m's I get 460 Km/H IAS at 1.3 Ata and at 5km's I get 420 Km/H at 1.3 Ata...

I have tracks if you want them.

I would like the tracks not because i do not believe But because i would like to learn... Its possible to maintain 460 km/h when coming out of dive but when accelerating in level flight i cannot build more than 430.

[IvanK]

Exccellent graph Klem

[CWMV]

Originally Posted by Ernst

I would like the tracks not because i do not believe But because i would like to learn... Its possible to maintain 460 km/h when coming out of dive but when accelerating in level flight i cannot build more than 430.

I get the same figures, ie 460kph in level flight(no diving into it), more with boost.
Trim is your friend, and keep the ball centered.

[5./JG27.Farber]

Originally Posted by Ernst

I would like the tracks not because i do not believe But because i would like to learn... Its possible to maintain 460 km/h when coming out of dive but when accelerating in level flight i cannot build more than 430.

PM me you email address and I will send you the tracks.

Or you can try 09:30 pitch and 1.3 Ata, line up the slip slide with rudder (ball - move towards it) and aileron (needle), make sure you are not ascending or decending with the altimeter. You wont be able to go straight to 09:30 pitch you will have to work the pitch down to it keeping the U/pm in the 1900 to 2350 range. Practice Practice Practice!

[Crumpp]

I couldn't easily trim the Spitfire

That is actually realistic. Welcome to neutral stability!



I tried it as well and found it extremely difficult to hold at a consistant climb speed. That is neutral stability and why the aircraft is a two fingered airplane. The airplane required very little trim input to achieve a trimmed condition as a result. Unfortunately, it harder to do that with a computer joystick as we don't have the "feel" of the airplane.

What I thought was unrealistic is the oil temperature rise. I could not get the Spitfire to decrease oil temps satisfactorily.

My oil temps stayed around ~85C in level flight at cruise settings with the radiator fully open and very quickly ran up against the maximum of 90C in a climb.

Running that close to redline in level flight is a squawk and it would be investigated to be fixed.

Granted it is summer time but with the exception of taxing, the temps in the summer never get that close redline at cruise settings.

OK, just some more spare time rambling to indicate we don't have a standard day and we don't know why it changes between servers. Or why Farber's wingman's altimeter reads different to his by 200m

I really think this the biggest issue. We have inconsistant evidence of atmospheric modeling. Temperature is above standard and pressure below standard. That is consistant and our density altitude should be high as per summer conditions.

What is not consistant is the variation in elevation as I assume pressure on the 200 meter altitmeter readings and most disturbing is the FTH is not consistant with a higher density altitude.

If the FTH matches standard day data by occuring at the same standard day altitude, the Flight Model's reaction to the atmospheric model is porked.

[GraveyardJimmy]

Originally Posted by Crumpp

What I thought was unrealistic is the oil temperature rise. I could not get the Spitfire to decrease oil temps satisfactorily.

My oil temps stayed around ~85C in level flight at cruise settings with the radiator fully open and very quickly ran up against the maximum of 90C in a climb.

The temps mean I run full radiator open at all times in both spitfire and hurricane. I hope it is fixed for the release of the new patch that adds more radiator drag.

[Crumpp]

The temps mean I run full radiator open at all times in both spitfire and hurricane.

Yeah that is not right. Most of these aircraft cruised with radiator, oil, and cowl flaps closed by design.

You opened up them up for stressful conditions like taxi, climb, or overload conditions.