Quote:
Originally Posted by Hersbird
Well I have heard the Cybertuck final is .34 Cd it's frontal area is pretty big too. So the smaller Rivian at .30 is the aero king still. The Cybertuck isn't that much better than the .357 2019 Ram. I can't seem to find he latest F150 or Silverado number especially the EV versions. Wait, I found a .404 for the gas 2015 F150, thr 2023 Lightning must be better than that. Bottom line the Cybertruck design wasn't game changing for aerodynamics. Put a aero topper on a Ram, make it an EV, and you probably beat the Rivian but definitely the Cybertuck.
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I watched the 24-minute You-Tube of the November 30th, Gigafactory Texas Cybertruck delivery event.
Within the presentation, Tesla's video contained a 'subtitle' reporting a 0.335 Drag Coefficient for Cybertruck.
Cybertruck's height is 64.5" at its lowest setting, width is given at 79.8", giving a gross frontal area of 35.743- sq-ft, before adjusted to 'actual' Af.
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The Rivian R1T drag coefficient of Cd 0.30, which has been repeatedly reported nearly universally among journalists, is from the AirShaper CFD results, which according to AirShaper's founder, Wouter Remmerie, does not reflect the Rivian's actual 'more like' Cd of 0.45-to-0.50, according to Remmerie.
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Another fly in the ointment involves the AirShaper initial CFD results for the un-wipered, and un-mirrored Cybertruck, which they reported @ Cd 0.48, which can now be compared to Cd 0.335, which includes windshield wiper and two side-view mirrors. If Tesla publishes scale technical drawings of Cybertruck, the actual projected frontal area may be ascertained directly from the front or rear elevation images.
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I myself will await official numbers from Rivian.
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Anyone with access to EPA Mobile Sources's data would be able to examine the Rivian R1T dynamometer load settings provided to EPA, of which would have the CdA values encoded within the specified loads. R-R values are measured directly from the twin-roll chassis dyno during certification testing in Ann Arbor, Michigan, if EPA chooses to verify a manufacturers own submitted claims.