Quote:
Originally Posted by Adger Smith
Does any one want to tell what the dual rating on AV gas is about? like 115/145 ??
Choices:
A. Heat value
B. Resistance to engine icing
C. Octane
D. Volatility rating
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The Lean Mixture rating is 100 octane (15 octane higher than the comparable 85 MON for unleaded Mogas) but Avgas also has a Rich Mixture rating of 130 which allows higher supercharger boost pressures to be used without detonation occurring.
I thought the high number was heat value, but I cheated and went to google