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Kari, I will have to check my sources but IIRC US Bendix pressure carburettor mixture control measured both manifold pressure and manifold air temperature to determine mixture ratio. Auto-lean and auto-rich positions had different sized main jets, i.e. moving from auto-lean to auto-rich meant an abrupt enrichment of the mixture. Full rich position had IIRC similar sized main jet as the auto-rich but had no altitude compensation. A sort of crude "limping back home" design.
As for the alpha sensors, doesn´t Raunio mention that at least the SB has similar system and perhaps the DB-3 as well?
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"No man, no problem." Josef Stalin possibly said...:-)
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7th March 2005, 11:40
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