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This question already has an answer here:

Imagine an amateur cyclist could generate 100 watts of power (professional ones can do 200-300), would it be possible to put that to use in a glider to fly further?

For example you pedal for 15 minutes and it is stored in a battery, and then it is used for 2 minutes of propeller power.

I guess one concern is that the addition of [pedals, battery, motor] would outweigh any potential energy gains.

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marked as duplicate by AEhere supports Monica, Bianfable, Community Oct 18 at 10:23

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  • $\begingroup$ The possible duplicate I linked to is about a different kind of craft, but the answer's solution and reference to the MIT Daedalus project is valid here as well. $\endgroup$ – AEhere supports Monica Oct 18 at 10:03
  • $\begingroup$ Hmm i guess i need to look at the power output of a electric glider and compare to say 100 watts to figure out how much percent it is for gliders. $\endgroup$ – user1138184 Oct 18 at 10:19
  • $\begingroup$ Looking at ls8-e it seems like the motor is 22kw, so about 0.5% of the power, I guess it's just as impossible. $\endgroup$ – user1138184 Oct 18 at 10:22
  • $\begingroup$ Looking at wikipedia it confirms "Sustainer engines are typically two-stroke two-cylinder air-cooled engines in the range of 18–30 hp (14–22 kW)" $\endgroup$ – user1138184 Oct 18 at 10:24
  • $\begingroup$ From this post, it appears like: 5 lb thrust = 1 horsepower $\endgroup$ – user1138184 Oct 18 at 10:30

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