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View Full Version : Spitfire IIa: On throttle reduction mixture lever snaps back to rich too early?



Artist
Mar-22-2013, 07:37
Gents,

The wiki states for the Spitfire IIa:

CARBURETOR MIXTURE
The engine is equipped with a carburetor which allows the pilot to select either 'Rich' or 'Lean' mixtures. 'Rich' mixture is used in all normal situations, takeoff, landing, climb, combat. 'Lean' mixture is only used to conserve fuel in level flight Cruise settings, and only when boost is set to '+1' or lower, and rpms to 2600 or lower. Use of 'Lean' mixture setting at higher rpms or boost will result in the destruction of the engine.

The manual I have (Zeno's Warbird Video Drive-In), states a boost of '+2.5' (87 Octane) and '+4' (100 Octane) for "MAX. WEAK CONTINUOUS".

But this is not the real point here, however: Neither +2.5 nor +1 is attainable with mixture set to weak with Spitfire IIa: The lever already snaps back to rich at about +6, (while the "Engine Info" in the window keeps saying "Mixture: 100%" - lever fully forward -, but that's probably just another bug, as the mixture is in fact 0% - lever fully backward - and you would have to press the appropriate keys twice - lean, than rich - to get it show "Mixture: 0%").

Question: Is this a bug ("Spitfire IIa: On throttle reduction mixture lever snaps back to rich too early?") or am I missing something here?

Artist

PS: The Spitfire Ia (87 Octane, 2600 rpm, weak at +2.5) does work!