Random Engineering, Physics, ..., Concepts and Ideas

Please post links to interesting, or not so interesting, concepts and ideas here.

Could it help to clarify something about a physical concept? Could it help us to build something? Then post it.

Supreme Skills! Miracle Paper Plane: Part 1 & 2

Supreme Skills! World Record for Paper Plane Flight Distance: Part 1 & 2

Supreme Skills - The Perfect Paper Plane: Part 1 & 2


That’s a great youtube channel! But a bit hard to find something (again) there.

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Cool flow visualization. Nice Boundary Layer explanation. Reynolds Numbers also inform. Flying seeds are natural AWES.

There are parachutes that maximize drag by “ribbon” construction, but solid canopies open faster for safer egress from airplanes, and easier handling after landing. Today’s parafoil parachutes are optimized for lift, to navigate in horizontal dimensions.


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A very amoral dishonest “law” by a weapons systems engineer reflecting the implicit lack of ethics of that profession. This is junk wisdom by someone who has made failed systems, or systems that kill just as intended.


While Law 25 above is sociopathic, Engineering has its golden precepts, like KIS and Murphy’s Law, and classic texts like Soul of a New Machine and The One Horse Shay. No one in our time is a better teacher of what an engineer should be than Henry-

Kidder’s classic applies to the drama of AWE-



NASA test video referenced in another video linked on the forum: