Turn it off, and be free!

Sorry guys... the Spit ain't no Tie-Fighter it actually flies as it should in CoD . So now its up to the pilots to learn how to get the best from it rather than depend on the UFO tactics of 46 :-P

I tried several times with the MkIIA full CEM and with AI controlled radiators, all is fine til about 4000 ft from 5000 ft the engines starts to stutter and more you climb, more the engine stutter is worse, then the engine fails at about 10000 ft. Thought that it was because the temperatures, but the water was stopped at about 100°C (it starts to boil at about 115°C because the glycol), the oil at about 80°C. If you fly at low altitudes no problem at all, you can fly with oil at 90°C and over, and the water at 120°C for few minutes without problems. But if you climb over 5000 ft... Maybe a bug, the beautiful Spitfire by A2A Simulations for FSX has a beautiful and real CEM, no problem with high altitudes. Regarding Cod Spit maybe a bug or another real feature that we are ignoring, like the ice in the carburetor, but in this case the engines doesn't fail, it stops. Is there anyone here able to go on high altitudes with the Spitfire in full CEM?

Fuel Mixture? You should lean it out as you gain altitude.

According with several sources, the Spit (and the Hurry), has 2 positions on fuel mixture, you can use the lean position only for cruise. Climbing it has to be rich at about +6 at 2600 rpm. But I tried, moving the (inverted in the game) lever to lean produces a major engine stutter, and this is normal I think. But why the engine starts to stutter above 5000 ft???? :confused:
On the other side the engine's cut on negative g is not a problem and doesn't cause problems.

Now I can manage the full CEM on the Spit and the Hurry because in combat the altitudes vary continually and mostly you finish your fighting at sea level. But if you try to return to base at high altitudes, the engine fails... :twisted:

What doe's the boost cut off do?

Two position mixture doesn't sound right. 2 position pitch, maybe.
+6 Boost? I'd say that's too high. Try climbing at 2650 revs and +4 boost. Trim to maintain optimum climbing speed. I'm at work now so trying to do this from memory but will see what I did to get up to 20000ft. This is in the Spit, not sure about the Hurri but will try it out.

No, it has only 2 position mixture: rich and lean. Lean is for cruise, because the Spit has huge amount of fuel consumption and this is a good compromise between horizontal speed, temperatures and fuel consump. The mixture is not critical like a Cessna or other small planes, where you have to listen to the engine and then pulling or pushing the mixt lever to find the right mixture. An engine of 27 liters works different. Tried at at +4 and +2 boost, even at high, med and low rpm: climbing full CEM over 5000ft means engine's fail with Spit mkIIa (rotol prop).

I tried Spitfire I (not IA) and Hurricane I (Rotol) and managed to get both to 20,000ft. I wasn't possible to get higher.

Climb limit (30min) for Merlin II and III: +6.25 Boost and 2600 RPM
Climb limit (30min) for Merlin XII: +9 Boost and 2850 RPM (however as the boost gauge is broken at the moment it's not possible to check this)

OK, now I have a project for tonight!

Thanks. I'll let you know later!:grin: