Very simple and quick question. Sorry for two posts in one day.
I just noted that the O-320-D2J engine I flew today has an 8.5:1 compression ratio. Question: why does a mere 8.5:1 compression ratio engine require 100 octane fuel? Surely it could run on 87, right? (I know it can't, but if I didn't know anything about aviation I would surely think it could.
I would think that one would need to be at 12:1 or even above to require "high test".
If you don't know what high test is it means you're even younger than me, or perhaps from Europe.
