esoteriic.com

I did some calculations that follow on from my earlier post (Electric Vehicles: build your own).

Did some power vs weight calcs for getting a car to 60mph/100kmh, I have electric cars in mind. Hopefully correct. :-) twitter.com/edthomson/stat…

— Edward Thomson (@edthomson) November 9, 2012

And then I decided to do a few more calculations for known vehicles. The following graph shows power versus weight for achieving 0-100kmh (0-60mph) in 5.6 seconds. I have a public Google document with my calculations. I think power is roughly correct but the number of batteries is probably wrong, I could do with someone fixing that. See here: Google Doc Power Calcs

Power vs weight calcs for known cars: 0- 100kmh in 5.6 secs. How about an electric Ford Excursion? O.o twitter.com/edthomson/stat…

— Edward Thomson (@edthomson) November 9, 2012

To create the picture I had to take out some of the names, here is the full list I worked with:

Ariel Atom 614 kg -> 85.96 kW

Koenigsegg Agera R 1290 kg ->180.6 kW

Ford Focus 5dr hatch 1340 kg -> 187.6 kW

Ferrari 458 Italia 1485 kg -> 207.9 kW

Nissan Leaf 1521 kg -> 212.94 kW

Lamborghini Aventador 1575 kg -> 220.5 kW

Ford Explorer 2060 kg ->288.4 kW

Rolls Royce Phantom 2550 kg ->357 kW

Ford Excursion (petrol V10) 3280 kg -> 459.2 kW

I've also done some checks now and the numbers seem pretty good. I check my KiloWatt calculations against horsepower using an online 0-60mph calculator at auto snout.

Test case:

Rolls Royce Phantom weighs 2550 kg (5610 lbs), and according to the calculator I need 440hp to get 0-60mph in 5.6 seconds.

From Google: 1 hp ~ 0.7456 kw. ThereforeL 440hp is 328kW... and I have 357kW in my spreadsheet calculations.

In related news uploading pictures to Twitter is quite handy, much easier than messing around with c-panel and it gives cross-posting. I'm sure there is a quicker way but... *shrug*.