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original and visualizations (some for Wikipedia)
1ucasvb's lab

Airspeed control: Power variable? Power : Power fixed? Pitch

HT @quickfoundnet
Aerodynamics: Forces Acting on an Airfoil 1941 US Army Air Forces Training Film TF1-161 -

Jocelyn Bell Burnell: 'a bit of "scruff''
From Eros to Gaia
Cosmic Search Vol. 1, No. 1 - Little Green Men, White Dwarfs or Pulsars?

"Matter shapes the geometry of space and the geometry of space tells matter how to move" - Physicist John Wheeler to Margaret Geller

"in a 2–MW wind turbine, the weight of the rotor and the tower is typically about 250 tons [...] a kite generator of the same rated power can be obtained using a 500–m2 kite and cables 1000–m long, witha total weight of about 2 tons only."