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A comment on Drone Bubble Bursts, Wiping Out Startups and Hammering VC Firms. Parent comment

Re:Drone Bubble Bursts, Wiping Out Startups and Hammering VC... by twic on Thursday September 05, 2019 @06:41AM (#20885417)
Could you couple one of those engines to a generator, and use that to power the electric motors? You'd need a battery or supercapacitor to handle change in throttle demand that outpaces generator response too.
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Re:Drone Bubble Bursts, Wiping Out Startups and Hammering VC... by jsjohnst on Thursday September 05, 2019 @07:35AM (#20885660)
Weight is the limiting factor. Try to find a generator that can output up to 400amps at 25V (what my big drone draws) and yet weighs less than five pounds including fuel.

I think that’s a more impossible goal than increasing power density in batteries is.

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Re:Drone Bubble Bursts, Wiping Out Startups and Hammering VC... by danmaz74 on Thursday September 05, 2019 @08:07AM (#20885825)
400 ampere??
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Re:Drone Bubble Bursts, Wiping Out Startups and Hammering VC... by scotty79 on Thursday September 05, 2019 @11:09AM (#20887491)
https://youtu.be/7zMPodObo-Y

This guy tries to make gasoline powered generator for large drone.

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Re:Drone Bubble Bursts, Wiping Out Startups and Hammering VC... by yardie on Thursday September 05, 2019 @09:14AM (#20886314)
Thermal to mechanical to electrical to mechanical. That’s a lot of energy conversions and with each conversion you lose a lot of efficiencies.
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