@BobCross - Yah, I wish I could call that at work as well. Get tired of hearing everyone else's views on politics while I cannot say a thing ... mainly because I'm usually the lone govie amongst a bunch of contractors. Great fun.
It's also fun out in the world when regular people are all "yeah those lazy bums!" and I have to remind them "You know, you're talking about me, right?"
I found a couple of GREAT references: https://2k9meduettaxila.files.wordpress.com/2012/09/internal-combustion-engines-fundamentals-heywood.pdf https://www.sciencedirect.com/science/article/pii/S0360128516300764#bib0001
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@BobCross - Especially when you're the "bum" who usually gets everything done.