Off topic: Winch cable launch for airliners

A lot of people have probably looked into similar idea already. Launch is the most energy intense part of a flight. Hybrid aircraft might become commercially viable soonish. My idea:

A winch, that
Pase 1, pull: pulls an airplane along the runway like a glider winch launch (might also skip this phase if that enables the cable to be lighter)

Phase 2, power: stays connected and provides electrical power to the plane through a high voltage cable for as long as possible. During this phase the airplane would accellerate as hard as possible.

Phase 3, return: decouples from the plane and returns in a controlled way, using a chute, drone or smth.

A lot of variations are imagineable.

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Robot landing pad for planes without landing gear | Brad Ideas

Robotic landing pad gets more serious | Brad Ideas

From the comments:

America: Circular take off. Dr. J. Gibson Winans a university of Wisconsin physics professor, demonstrates a pinwheel take off. - British Pathé
America: Circular take off. Dr. J. Gibson Winans a university of Wisconsin physics professor, demonstrates a pinwheel take off. (1955)

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Not very off topic? A plane on a tether is very much a kite :slight_smile:

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Airplanes take off and land best, and safest, into the wind.

https://www.reddit.com/r/Futurology/comments/1brjntw/a_startup_is_trying_to_tow_aircraft_to_cut_air/

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Mozaero seems to want to do something related as well, very early stage though: https://www.mozaero.com/copy-of-technology

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Charging a drone from a power line: Autonomous Overhead Powerline Recharging for Uninterrupted Drone Operations — University of Southern Denmark

Autonomous Overhead Powerline Recharging for Uninterrupted Drone Operations - ICRA 2024 - YouTube

From the reddit topic:

This Is DJI Dock 2

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