One gallon of gasoline carries 115,000btu of energy, that's a hard fact. A gasser engine puts give or take a few % of 1/3 of the gasoline's energy to the crankshaft. So that one gallon of gasoline is going to make 15HP over the span of an hour. Ideal steady state pie in the sky ideal fuel consumption at 50mph steady state for 20mpg would be 2.5 gallons per hr.Which would be using 37.5 flywheel HP average over that hour. I don't see how one can push a pickup and trailer through air drag at 50mph. Tire/rolling/drivetrain friction plus dragging 4.5 tons of truck/trailer/people/fuel uphill. While burning off that same energy with the brakes going down the other side of the hill. Lets add losses for starting stopping for traffic too etc.
Despite what some other on this site and elsewhere may think & say. You can't cheat the laws of physics. Automotive engineers do very well to wring the mileage out of vehicles. They must be frustrated when the "lah lah land " idealistic types without a clue in physics. When these lobby groups and equally clueless government officials want the impossible.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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