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submitted 2 weeks ago by xkcdbot@lemmy.world to c/xkcd@lemmy.world

xkcd #3244: Pullback Drive

Title text:

"How does the spring not run out almost immediately?" "We pull it back REALLY far."

Transcript:

Transcript will show once it’s been added to explainxkcd.com

Source: https://xkcd.com/3244/

explainxkcd for #3244

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[-] s@piefed.world 2 points 2 weeks ago

Put another pullback motor in but backwards and you’ve got yourself infinite energy

[-] DarrinBrunner@lemmy.world 1 points 2 weeks ago

Imagine a spring large enough to last 200,000 miles.

[-] SkaveRat@discuss.tchncs.de 1 points 2 weeks ago

sounds like a great what if post

[-] cybervseas@lemmy.world 0 points 2 weeks ago

I can't remember which car but an early hybrid vehicle did charge up a flywheel instead of an electric battery…

i think it was a bus, and it was used in hills to get extra energy while going down and using ot while going up.

[-] Jakylla@jlai.lu 0 points 2 weeks ago* (last edited 2 weeks ago)

I heard about racing car having spinning wheels too, instead of br~~e~~aking before turns, accumulating energy into them, then after the turn, releasing them for huge acceleration

[-] homesweethomeMrL@lemmy.world 0 points 2 weeks ago
[-] xylol@leminal.space 1 points 2 weeks ago

If its a race car it does both

[-] eigenraum@discuss.tchncs.de 0 points 2 weeks ago

Exactly what I'm looking for, I live on a mountain and work in the valley.

[-] Opisek@piefed.blahaj.zone 1 points 2 weeks ago

For this to work, you've gotta bring more weight down than you do back up.

Thankfully, you can just leave all your hopes and dreams at the workplace to make your car lighter on the way back!

this post was submitted on 12 May 2026
8 points (100.0% liked)

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