For anyone who likes drones this is a good find
I found this to be true in many areas of my life.
Leave it to the guys at flite test to turn a Drone meme into an actual flying drone using box fans for a frame. Enjoy
Think of this as the cliff notes for the official Machinery Handbook, at only .900″ thick this one is not a door stop.
Machinery’s Handbook Pocket Companion is designed for anyone in the machine trades for whom convenient access to just the most basic data is at a premium. Extremely concise yet authoritative, this invaluable tool draws on the wealth of tables, charts, and text in the Machinery’s Handbook, 30th Edition. Much of the subject matter is reorganized, distilled, or simplified to enhance this book’s usability and to keep its bulk down. Both practitioners and students will find the Pocket Companion to be a convenient ready-reference to keep nearby while working on the shop or factory floor or learning the fundamentals in the school lab. While it serves as a complementary text, this book does not replace the Handbook.
Quite the convincing flying witch.
Nothing too new but with high power electric motors and foam board building methods there is a lot you can do on the cheap now days.
to see a vintage plan: https://outerzone.co.uk/plan_details.asp?ID=5902
and some more modern stuff: https://www.rcgroups.com/forums/showthread.php?2004967-RC-Broom-Flyer-Wizard-Witch/page4