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A comment on Vertically aligned carbon nanotubes triple the density of lithium batteries. Parent comment

Re:Vertically aligned carbon nanotubes triple the density of... by bfieidhbrjr on Wednesday October 07, 2020 @02:34PM (#24711203)
> if you can build batteries with the energy density of gasoline

Actually significantly worse than that. A plane gets lighter the longer it flies, especially at takeoff when everything is at max thrust. A battery becomes more and more dead weight the longer you fly.

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Re:Vertically aligned carbon nanotubes triple the density of... by bitdotdash on Wednesday October 07, 2020 @03:35PM (#24711827)
I wonder if this could be solved for with detachable take-off booster. Gets you up in the air, then returns to the airport.
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Re:Vertically aligned carbon nanotubes triple the density of... by ginko on Wednesday October 07, 2020 @05:16PM (#24712836)
Couldn't you just start with a cable that detaches and is pulled back to the landing strip?
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Re:Vertically aligned carbon nanotubes triple the density of... by mPReDiToR on Thursday October 08, 2020 @06:27AM (#24717768)
A "third rail" along the runway and a dodgem/Scalextric type conductor springs to mind.
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Re:Vertically aligned carbon nanotubes triple the density of... by noodlesoups on Thursday October 08, 2020 @05:22AM (#24717382)
Just make sure it detaches properly, you don't wanta a dozen wire to yank you in mid ascend
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