Propfan Boeing 727. 2:31 video:
More: https://en.wikipedia.org/wiki/Propfan
Previously:
Creating a propellor from a template - GIF
Backing in a plane with a reversible propeller - video
Propeller actuation - GIF
Propeller vortices on small plane - GIF
Para-propeller Skyrunner crash - GIF and video
Hand propping a plane gone wrong - GIF
Casting a giant propellor GIF
Propeller feathering - GIF
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