AlanSubie4Life
Efficiency Obsessed Member
Seems like a good plan. I am pretty sure my highway numbers in the spreadsheet for the Model Y will be close to the actual value from the test. Has to be!
In any case, Model Y looks like it will (predictably) have much worse range than Model 3 on the highway, under best case conditions at least (it is still fine though). I would guess long term they’ll want to cram more battery in there if they can.
@Words of HABIT any particular reason for disagreement with this?
Definitely will see what sort of numbers I can pull out of the detailed certificates that @bhtooefr has pointed out to see if I can track the efficiencies on these other cycles.
But the fact remains that the raw HWFET is a very decent (optimistic) predictor of best-case Highway range. And comparing that result to Model 3 should be safe. And it clearly (no surprise!) is a lot worse than Model 3.
@SageBrush yes I think that squared coefficient isn’t bad as a model of relative aero loads. When calculating to get predicted Wh/mi impact, though, you have to make some assumptions about drivetrain efficiency; it can’t be used directly. So you can’t necessarily use it to compare the efficiency of two different vehicles at highway speed, if the drivetrains are different. I’ve never tried to piece this all together though. I just have my own empirical physical model, which is good enough for who it is for.
I guess I have to ask the same of @StealthP3D. What is there to disagree with? I mean, the range of the Model Y will be fine, but on the highway it is likely going to get about 10-15% less range than a Model 3. So rather than 225-250 miles at 70-80mph between charges under optimal conditions, it’ll likely get around 200 miles. Which is fine, but not optimal! So I could see there being a long-term effort to get better battery energy density to make it awesome for road trips.