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And it shows how much early acceleration helps cover distance, versus pure top speed.
But why does the Model S have a lower max speed? I don't think it matters much in practice, just curious if it is by design or if ICEs still have an advantage in delivering higher max speeds?
But why does the Model S have a lower max speed? I don't think it matters much in practice, just curious if it is by design or if ICEs still have an advantage in delivering higher max speeds?
Its based upon the max rpm of the motor. 16000 rpm gets you 135 mph in MSP. there was some discussion of using a higher rpm motor with subsequent higher top speed, but no real news since then. 135 mph is more than adequate to land you in jail. A posted comment from the video incorrectly pegs the top speed at 110.
The video ends when the S brakes lite comes on.
I believe Model S RPM is 14,000, not 16,000. With that in mind you should get 130mph max speed using your calculations.so at 16,000 RPM, the wheel rotates 1,644.4 times in a minute. 1,644.4 * 2431.28mm = 3.998km per minute or 239.9kmh = 149mph.
A 245 tire has a circumference of 2431.28mm (I will do this first in metric and then convert to MPH).
The reduction gear is 9.73:1
Motor RPM max (as you state) is 16,000
so at 16,000 RPM, the wheel rotates 1,644.4 times in a minute. 1,644.4 * 2431.28mm = 3.998km per minute or 239.9kmh = 149mph.
So the theoretical max speed should be 149mph. I suspect that the power required to get to that speed is just not available. Drag would increase the power load from 110mph to 150mph by 1.86x
Absolutely. With the low drag Model S should have no problem hitting 150mph with its 416bhp engine. But who really need 150mph+ top speed....With a second gear ratio the Model S Performance could easily push the car faster with its 416hp.
max speed and top speed do not matter, model s is not a race car.
and its all about acceleration
A 245 tire has a circumference of 2431.28mm (I will do this first in metric and then convert to MPH).
It's about 14 seconds from "go" to the brake lights coming on. If they were both trying, 110mph is about right. Note that by then the E63 is going a bit faster than the Model S... I'm guessing it was probably doing the 110.
I love watching videos of the Model S launch. The 100% torque from standstill is the reason why I have always wanted an AC induction motor to power a car. It just makes sense.
And it shows how much early acceleration helps cover distance, versus pure top speed.