Comment Re:Aerodynamic? (Score 1) 181
Frontal area is the single biggest factor in the drag calculation, and having things stick out increases that.
HTH, HAND.
The average drag coefficient of an American ICE sedan is between 0.25 and 0.30. The drag coefficient of a Tesla Model S is 0.21; other Tesla models are similar. Non-retractable door handles are estimated to increase the drag coefficient somewhere between 0.001 and 0.01. Assuming Tesla has competent designers as indicated by the cars' already very low drag coefficients, they could probably come up with a design that falls somewhere in the middle of that range, say 0.005, which would represent a drag coefficient increase of roughly 2.4%, which would yield an estimated decrease in range of about 2 miles. There are lots of other factors that have a much larger impact on range, including temperature, speed, acceleration, terrain, wind, tire pressure, and HVAC use. My guess is, any range increase gained by retractable door handles is completely swamped by those factors, particularly temperature and driving habits.
Disclaimer: the figures cited above regarding the impact of door handles on drag coefficient and range are based on Google AI's response to the query "how much to car door handles contribute to total aerodynamic drag?" No doubt an expert in aerodynamics would be able to come up with a more accurate estimate.