Hey guys. I have had my model Y for a few months now. The range is supposed to be around 300 miles, but I can barely get 200-220 miles range on mine even in chill mood and keeping my speed around 75-80. Is this normal?
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Hey guys. I have had my model Y for a few months now. The range is supposed to be around 300 miles, but I can barely get 200-220 miles range on mine even in chill mood and keeping my speed around 75-80. Is this normal?
Yes, because...Is this normal?
That is very high versus what is used for the EPA official efficiency ratings method. The force of air resistance goes up incredibly fast, exponentially with speed. You can about match the EPA "rated miles" 1 to 1 if you have heat and A/C off and are going around 65 mph. If you're going 80 mph, that's going to drain those significantly faster.keeping my speed around 75-80.
The EPA range test is done at 55mph, physics...keeping my speed around 75-80. Is this normal?
With 1 occupant, NO A/C, on flat ground, etc.The EPA range test is done at 55mph, physics...
Yes, because...
That is very high versus what is used for the EPA official efficiency ratings method. The force of air resistance goes up incredibly fast, exponentially with speed. You can about match the EPA "rated miles" 1 to 1 if you have heat and A/C off and are going around 65 mph. If you're going 80 mph, that's going to drain those significantly faster.
Now I can already feel it coming (we've seen it many times), where people flip out and say, "I paid $XX,XXX for this car! I shouldn't have to slow down!!" No one is saying you have to. Drive 110 mph if you want to. But this is just informational that you are not going to match the EPA efficiency ratings doing that, and you may just need to charge longer at Supercharger stops.
51 psi is rock hard man... so that is one aspect. But two, 265 wh/mi... that's not MYP territory. Were you driving a MYP?I dunno about you guys but I just drove from SF to LA...left with 96%...avg 80 mph and 265 wh/mi on 51 psi. A/c set to 70 degrees on fan speed 2... Got to kettleman with about 25 miles left. System indicated 12% at arrival got there about 9-10%...seems but be about what I normally get but that's is strictly all freeway...I'm no where near 200-225 total range.
Oops yes MYP...late 2021 build. On road trips I tend to bump it up since the roads are smoother than in the city and looks seems to help with mileage. I get about 240-250 range normally within the city...but ofc we have crazy hills here.51 psi is rock hard man... so that is one aspect. But two, 265 wh/mi... that's not MYP territory. Were you driving a MYP?
That is not what I was taught in freshman Aero at MIT. The force (not energy) available from the action of moving air was pronounced as "rho halves v squared". Where Rho is the air density, and v is velocity. I can still hear the professor emeritus intoning that phrase many times in some classes. He dated back to the early 20's, and was pulled in as a consultant to Henry Kaiser to design an air transport alternative to sea transport to Great Britain during WWII (that one did not get built).The force from the wind goes up (roughly) linearly with speed, so that reduces your range by roughly the same factor.
I think I found this graph somewhere on this web site. I can't vouch for accuracy. It does help the point that aero is negligible at really low speeds, and utterly dominant at high speeds.Archae86, good point; my explanation is flawed. My conclusion seems valid though. Gotta ponder this a bit.
What are your thoughts on the near-linearity of the right half of this graph?I think I found this graph somewhere on this web site. I can't vouch for accuracy. It does help the point that aero is negligible at really low speeds, and utterly dominant at high speeds. View attachment 840841