Not quite there yet. But we have chocolate printing, and now 3D printing can make moving parts.
3D printing is a form of additive manufacturing technology where a three dimensional object is created by laying down successive layers of material. 3D printers are generally faster, more affordable and easier to use than other additive manufacturing technologies.
That would be a pentagaffe
Meet Your Sponsor: Metro Diverse Service’s Panterragaffe: A Pedal-Powered Walking Machine
Panterragaffe is a pedal powered two person walking machine, a walking bicycle. The name has a few elements to it. It’s a play on pantograph, which is a mechanism for copying drawings, since it’s similar to the leg mechanism. Also; Pan – all or spanning. Terra – earth. Gaffe – an unintentional act causing embarrassment to it’s originator or just goofy-ness. A bit of goofy-ness for everybody. To most people the name doesn’t mean anything, therefore its meaning is flexible.
The meandering instability of a viscous thread
A viscous thread falling from a nozzle onto a surface exhibits the famous rope-coiling effect, in which the thread buckles to form loops. If the surface is replaced by a belt moving with speed U, the rotational symmetry of the buckling instability is broken and a wealth of interesting states are observed
Note the recoil when the Roman candle fires (there’s one clear instance of this). Conservation of momentum.
OK, a cymbal. Ooh, Bessel functions!
There was a story I heard when I was a student, (perhaps/likely apocryphal) way before youtube made it possible to record and share the examples so easily, of a professor doing this demonstration, wrecking-ball-to-nose, but letting a student give it a try, and the student gave the ball a small push. Broken face.
(See you next Wednesday would have been a gag that probably none of the students would have understood)
More of my fascination with dragonflies, captured in slow-motion. Got some to hover for me at Burke Lake Park. (Also nabbed a whole bunch of geocaches. It was a good day)
The lower resolution at 420 fps is a little frustrating, as is how it’s further degraded by youtube compression. 210 fps didn’t turn out too badly: