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I took the time to watch the videos. They left me wanting to hear more technical details. Specifically, what is the drag coefficient and frontal area of the car? You can't tell from the first two videos, but the top half looks very low drag. I can't see the bottom half very clearly, nor do we know where the wheels go yet.
The Suzuki 1.0L 3cyl is not a bad power plant, but I absolutely love Honda's lean-burn capable 1.0L 3 cylinder, which comes with regenerative braking and electric assist. A donor Insight will also provide you with dozens of lightweight components you can use, breathable seats, electric power steering, LRR tires, a futuristic gauge cluster, and maybe some ideas about how to improve efficiency.
I like the location of the taillights. As long as the leading surfaces follow streamlines, they should contribute only a little drag. You could eliminate the leading surfaces for better aero at the expense of aesthetics. I wonder if narrow rear wheels on outriggers, with lights mounted on them, would be a viable solution for a car with a narrow body and a wide track.
I share Frank's cynicism regarding the fuel economy of the car. I completely doubt you will double the thermodynamic efficiency of an engine where Suzuki's engineering teams failed to do so.
The problem of achieving maximum engine output per unit fuel is one completely seperate from that of building an efficient body. If you have a cost-effective design with amazing efficiency, prove it on a bench dyno and sell it for tens of millions.
As for the amount of energy required to move the car a mile, well, as Frank said, tell us your CdA and Crr, and I'll tell you your mpg @ any given BSFC. Let's see some numbers and measurements to back up those wild claims!
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