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The "hidden agenda" reasons I had for posting this "old" equation:
1) Shows how only WT, CID and AR are needed to estimate Fuel Economy (it's basically all about engine displacement and rpms).
2) Shows type (logarithmic) equation (product-of-powers): c = K*a*b*c
3) Shows quasi-cubic-root "power" for each variable: ie: WT^(≈1/3), CID^(≈1/3), AR^(≈1/3).
4) To provide *another* way to visualize/quantify how FE can be quantified...ie: "put into numbers"
...or, "rule-of-thumb" roughly: mpg ≈ 1900/(WT*CID*AR)^(1/3)
Last edited by gone-ot; 12-13-2015 at 01:58 PM..
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