Quote:
Originally Posted by ConnClark
Actually you need more fuel and Oxygen to make 100HP in high humidity.
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facinating stuff from 1929. Hard to draw any such conclusions from it though. They were tuning for optimum power, not bsfc for one thing. And as AV is liken to do, they run rich almost constantly, perhaps made more rich by displacing oxygen with water vapor. And of course it is a non-feedback carb.
However, if you look at figure 2, the "presumably" smallest/leanest orafice produces more gain than any of the other orafices lose when humidity approaches %100.