What are you getting for Wh / mile at 80 mph?

[ZeApelido]

I've done just a bit of testing, and was getting between 285 and 290.

 

[Sneakerhead]

It depends on slope. If i go west to LA i get incredible mileage. When I drive east i get 290 driving under 75 consistently or 360 if going 80-85

 

[ZeApelido]

Of course, I'm assuming flat road conditions.

 

[chronopc]

I've done just a bit of testing, and was getting between 285 and 290.

I haven't tested it yet, but if it's under 300wh/mi that is really good.

 

[Haxster]

For comparison, on my S, (without air suspension to lower the car), I get about the following results:

MPH Wh/Mi
50 230
60 270
70 320
80 370
90 440
100 jail

 

[Jedi2155]

I've done just a bit of testing, and was getting between 285 and 290.

You'll have to report your configuration and tires too.

 

[ZeApelido]

Doh. LR model, 18" with aero caps.

 

[Jedi2155]

Doh. LR model, 18" with aero caps.

Thats in line with Troy's estimates (270 mile range at 80 mph ~ 290 Wh/mile)

 

[banned-66611]

Thats in line with Troy's estimates (270 mile range at 80 mph ~ 290 Wh/mile)

That implies over 78kWh of energy from the battery. The battery is thought to be 75kWh and of course you can't use all of it.

240 miles range at that speed seems more realistic (70kWh available).

 

[Jedi2155]

That implies over 78kWh of energy from the battery. The battery is thought to be 75kWh and of course you can't use all of it.

240 miles range at that speed seems more realistic (70kWh available).

EPA doc shows 80.5 KWh pack, 78270 Wh usable (beginning of life), 89404 Wh AC for a recharge.
https://iaspub.epa.gov/otaqpub/display_file.jsp?docid=42148&flag=1

Tesla likes to refer to a 50 kWh and 75 kWh, but honestly, they don't like using KWh as a metric either from what I understand.

 

[SageBrush]

That implies over 78kWh of energy from the battery.

Correct. Usable is ~ 78 kWh

 

[SageBrush]

65 mph is ~ 220 Wh/mile

A Model 3 traveling at sea level at 80 mph (36 meters/sec) has another
150 N of Air drag,*
= 41.6 Wh/km
= 67 Wh/mile

Added together, 287 Wh/mile.
The useful point here is that once you have accurately measured the car on at one speed it is easy and accurate to model other normative highway speeds because the only Wh/mile variable to consider is Aero.


*
Air drag is 0.5 * Rho * Cd * A * v * v
For the Model 3,
Cd = 0.23
A = 2.34
0.5 * Rho (sea level) = 0.6125
So Cd * A * 0.5 * Rho = 0.16482375
So Aero drag is v*v*0.16482375 in Newtons, or ~ v*v / 6 (about 1% error)

Work = Force * distance
Newtons * meters = Joules
Newtons/3.6 = Wh/km
1 Km = 0.62 miles

 

[daniel]

80 mph??? OMG! I think I'd be scared to drive any car at 80 mph long enough to figure out the efficiency. One of the things I love most about this car is that I can drive it let it drive itself at the speed limit and it takes away all the stress and anxiety. No need to drive it fast.

 

[Jedi2155]

80 mph??? OMG! I think I'd be scared to drive any car at 80 mph long enough to figure out the efficiency. One of the things I love most about this car is that I can drive it let it drive itself at the speed limit and it takes away all the stress and anxiety. No need to drive it fast.

80 MPH is pretty much traffic speed in some areas, while anything faster than 55 mph might feel crazy in other parts of the US. I was quite surprised by this when I traveled a bit around.

 

[SageBrush]

80 MPH is pretty much traffic speed in some areas,

The irony is when those high travel speeds are in congested areas. I suppose it is a psychological compensation of sorts: 80 mph once in a while, 20 mph the rest of the time.

 

[Electroman]

I have hardly touched 80 in my life, may be inadvertently. 75 sometimes in lonely stretches, but mostly between 70 to 75.

 

[Jedi2155]

The irony is when those high travel speeds are in congested areas. I suppose it is a psychological compensation of sorts: 80 mph once in a while, 20 mph the rest of the time.

I fel

I have hardly touched 80 in my life, may be inadvertently. 75 sometimes in lonely stretches, but mostly between 70 to 75.

That's odd because I was in Austin this past November driving 100 miles to a small town and I was commonly doing 70-80 and people were still passing me. In New Jersey, everyone was doing 45-60. Going between LA to SF or LA to Vegas, 80-100 is pretty common.

 

[diamond.g]

How are you guys getting this data? I thought Powertools didn't work anymore.

 

[jamnmon66]

Just got back from a 4000 mi. road trip. I got around 280 at 80. Around 315 at 90.

 

[Garlan Garner]

I have a P3D+ Model 3.

I go from 0 to 80 in 3.6 seconds...…..then regen back to 0......then 0 -80 in 3.6 seconds.....then regen back to 0.....all the way to work ( 49 miles). .

Lets see...that might be an average of 40mph.


I wonder what I would have to do to average 80mph?