# Help calculating max speed of my electric car

2878 Views 13 Replies 8 Participants Last post by  sadcar
What would be the max speed of my electric vehicle? I need a systemic way to calculate this given BLDC ratings: Voltage, Rated Power, Rated Speed, Rated Torque, Rated Current, No load Current, No Load Speed. Also using these constants: Weight and coefficient of friction. There are two motors. We are ignoring any resistance from the shape of the vehicle. The car is in a vacuum.
1 - 3 of 14 Posts
What would be the max speed of my electric vehicle? [...] We are ignoring any resistance from the shape of the vehicle. The car is in a vacuum.
Mhm. Good good.

does some math

Looks like your top speed will be just slightly under 670,616,629 mph.
and the only place with lots of vacuum is space so no rolling resistance either
That's not necessarily true. You could also pull a vacuum in some kind of sealed test chamber here on Earth, if we're going to play the pedantic game. But why assume Earth?

I'm mostly just trolling and saying the funniest thing possible because it's obviously someone's homework question, not a person who actually wanted to know and needed help with the question.
1
It's not for homework. I am on a team designing a scale model hyperloop pod
Wait, so this isn't for a class, you're a professional legitimately designing a hyperloop vehicle, and yet you need help doing basic calculations from a DIY forum?

I'm all for ambitious projects, but, do you think perhaps you're too far out of your wheelhouse to engineer this solution?

This would be the equivalent of saying you're designing an F1 racecar, and then asking on an internet forum "How do you add air to the tires? What does PSI mean?"

Everyone starts somewhere, but, I can't see how far you could even take this project without everyone literally doing it for you, if you need help at step 1. The knowledge is - at least to some degree - cumulative. You'd by definition need even more help at steps 2-100 too, right?

Maybe start with something less challenging while you take the time to build your knowledge to a point where you can apply it to your project?
See less See more
1 - 3 of 14 Posts