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Originally Posted by AeroMcAeroFace
1) What is the relevance to your calculations? Tesla used to use the front/rear power split to maximise efficiency as the motors had different efficiency bands, I don't know if they still do.
2)Relevance?
3)True, apart from the fact I am not an engineer
4)Assumptions of constant efficiency are perfectly adequate,(assuming you know that there is a small margin of error) we can agree there also. Thanks for clearing that up.
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1) As Tesla is the gold standard for efficiency, your points would not be lost on them, and if they thought it was merited, they could go to a 2-speed trans, as Porsche has. Sandy Munro, of Munro Associates has reported on this topic specifically.
Cybertuck / tadpole is limited to aerodynamics vs road load, in comparison to a Cybertruck with the body shape of an Silverado / Sierra, F-150, RAM 1500, and Cybertruck 'naked'. The 'shape' is the only variable.
Range remains an issue. 800-plus miles per charge may be of interest to those with range anxiety. Cd 0.10 leaves something on the table.
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2) Karlsruhe claims that the only issue for them, were the items listed, and with enhancements of magnet positioning, they were able to shape the magnetic field lines of flux in their motor, to overcome the Lorentz - Reluctance conflict, rendering the high-rpm issue mute.
Living off the grid for a decade, we learned that out inverters operated at their maximum efficiency at maximum load. Heat sinks for MOSFETS, IGFETS, whatever, were sized for the heat flux at 100% load.
Thermal management at battery, power conversion, and motor, all seem to be 'engineered ' for.
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3) Even the SAE Paper on the 1934 Chrysler De Soto Airflow, aerodynamic test-mule experiments included constant BSFC in their energy balance methodology. I think engineers have used it way before gasoline or diesel ever existed. Wood. Coal. Capitalism demands the fewest unknowns. H. Ross Perot's Electronic Data Systems built an economic empire from table scraps IBM was comfortable throwing way.
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4) Yes, a smidgeon of inexactness is a luxury which we are all accorded.