Fred Rash’s electric circle plane #flying #video #engineering using a 10mAh battery and a tiny propeller. It’s carbon-fiber rings, polyester film stretched over them, and balsa wood. No control surfaces, I think. The video has it flying around inside a roofed football field; the battery lasts a couple of minutes.
on 02024-04-05#StuffMadeHere world’s fastest wrist disc (frisbee) launcher #engineering #video. Strangely he’s using a rotary joint instead of a linear one for the disc launching, and has all kinds of trouble. 9.7 million views!
on 02024-04-03#Thought-Emporium aluminum foil and highlighter ink to make #lasers with a TEA pump #engineering #video
on 02024-04-03Fibonacci turbines. A 3-blade spiral turbine reached 48% efficiency at low water speed, much higher than a conventional propeller. The Liam F1 Archimedes turbine along these lines provides wind #energy at low wind speeds. Author “Ziroth” includes lots of talking-head filler footage. #engineering #video
on 02024-04-03Voith-Schneider and ABB Dynafin cycloidal propellers #flight #engineering #video #toread
on 02024-04-03#Video of Dan #Gelbart's uniflow #steam-engine #engineering #hardware
on 02015-08-13