Off topic: Winch cable launch for airliners

[Windy_Skies]

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

Sustainable Aviation

The aviation industry is responsible for 10% of global transport emissions, and faces increasing pressure to transition toward a zero-emissions future.

A large proportion of the energy onboard an aircraft is wasted carrying its own weight, and as much as 20-40% of that energy is used during takeoff and landing alone.

By combining efficient aircraft design with tethered propulsion technology, we can fly more sustainably and drive costs to new lows.

Mozaero

https://www.mozaero.com/ Kevin Rand is the Head of Operations, after having worked for Ampyx Power. Mozaero seems to be taking over from Ampyx Power. Thanks to Dave Santos for providing the link to the Mozaero site.