4 ms·
The energy required only grows quadratically if you stay on one technology. Simultaneously switching from internal combustion to linear electric motors with ef
by nickparker 9y ago
The energy required only grows quadratically if you stay on one technology.
Simultaneously switching from internal combustion to linear electric motors with efficient regen. braking and bumping the speed up 10x turns out to be a wash.
- wolfram74 9y agoTo clarify, you are stipulating that electric engines and regenerative breaking are ~100 times more efficient than a combustion engine? Because mv^2 means a 10 fold increase in speed is a 100 fold increase in kinetic energy.
- nickparker 9y agoThanks for the catch, I wrote that comment a little too flippantly and left out important factors, the motors/regen alone certainly don't get you there. Adding in the reduced drag of levitation vs soft tires combined with central control to avoid stop-n-go intersections/traffic gets you to 100x more efficient. Edit: Also, I should just drop this link to some envelope math I did last Fall: https://medium.com/@nickparkerprint/why-im-still-excited-about-hyperloop-ef66a58aeca8 https://medium.com/@nickparkerprint/why-im-still-excited-abo... And since I didn't think of this either before the first comment: I'm currently an employee of Hyperloop One, but none of the statements made in this thread are at all based on H1's design or proprietary info. They're based on the envelope math above, which was done before I started working there. I don't actually know H1's efficiency numbers because it's not my department.
- deleted 9y ago[deleted]