9 ms·
> Lower drag coefficient than a bugatti veyron I LOLed at this one. Supercars want lots of downforce so they don't constantly go off the road and you die. They
by semi-extrinsic 9y ago
> Lower drag coefficient than a bugatti veyron
I LOLed at this one. Supercars want lots of downforce so they don't constantly go off the road and you die. They're not built for low Cd. A Toyota Prius has 35% lower drag coefficient than a Bugatti Veyron.
It's like when the "superfruit" people go "look at this amazing berry, it has 20% more vitamin C than a lemon!" Well yeah, an orange has 70% more vitamin than a lemon. Marketing wank for the uninformed masses.
> On empty 30 min of charging will get you 400 miles.
I did a double take here. To do that we're talking ~ 1000 kWh drawn from the grid in 30 min; that's pulling 2 megawatts of power. None of the existing Supercharger installations come close to providing enough power for even one truck.
It also means that on the distribution grid, a charging station for 8 semis will need a dedicated 20 MVA 33/11 kV distribution transformer, plus 4 11kV/480V transformers. Unless you manage to keep those charging slots filled 90% of the time, that's going to be bloody expensive electricity.
- colordrops 9y agoThere will likely be huge fields of solar cells scattered across the nation with countless trucks pouring through. There is no way this is not the future, even if Tesla doesn't pull it off. But who else is even trying?
- loufe 9y agoGreat breakdown!
- JoshTriplett 9y ago> It also means that on the distribution grid, a charging station for 8 semis will need a dedicated 20 MVA 33/11 kV distribution transformer, plus 4 11kV/480V transformers. Or a pile of batteries.
- raverbashing 9y agoSure, and how you're supposed to charge them fast enough to charge incoming trucks > a charging station for 8 semis will need a dedicated 20 MVA 20MVA is approx. 20MW, Solar Power is 100W/m2 hence that gives 0.2km2 (or 200,000m2 of needed area for 20MW) Solar won't help you in this case
- mtgx 9y agoNot locally, at least. Utility-wise, it will work out.
- njarboe 9y agoMusk stated in the presentation that they plan to use solar with on-site battery storage at these "Mega-Charger" stations and will guarantee a max electricity cost $0.07/kWh. No grid needed (my phrase, not his). Not sure if it is doable, but that is the plan.
- macarthy12 9y agoA perfect place to stick a load of solar panels? The roof of a warehouse.
- csours 9y ago> Lower drag coefficient than a bugatti veyron Also, the coefficient is then multiplied by the frontal area of the vehicle. A semi has a helluva frontal area.
- JorgeGT 9y agoAlso, drag scales with the square of the velocity [1], and a semi is a helluva slower than a racing supercar. --- [1] drag = 1/2 x air_density x frontal_area x drag_coefficient x velocity^2
- IndrekR 9y agoSounds like a "powerwall for a small town"