How to make a Motorized Kite Line Winding Reel

How does this reel work? I'm confused and can't figure it out

Line Winders & Spools - Page 1 - The Kite Guys

How to make a Kite line winder

An Automatic Kite String Winder. Flying a kite can be fun, but what's

The Kite Reel - From Bits Of Stick To Multi-Drum Winches!

Kite reel / winder : r/kites

Kite Reels

Kite Winder, My kite line winder, inspired by the Premier k…

Reels, Winders, and Spools