Dear O-listers:
Some months ago, I remember a good quality internet video (youtube,
perhaps) demonstrating a simple rectangle propeller while running
(jogging) in public parks and nice places, or just getting advantage
of the wind... It was quite beautiful. It included instructions for
the propeller (a single tray, below I describe it better).
Now, I just can't find it. Perhaps someone there on the O-list has
seen it and remembers it... Or something similar. If it is so, please
let me know.
I have found many videos of people demonstrating a smaller version of
that propeller with cigarette paper (it spins nicely), but I am
interested in the running (jogging) application.
Just to explain what model am I talking about, it is folded with any
rectangle (say, 10cm x 15cm), just folding up some paper all around
the perimeter to form a tray. If you put your finger in the middle of
the back side of the tray and start running, it spins nicely, as shown
in these videos:
https://www.youtube.com/watch?v=ON7KiHsNSnM#t=50
https://www.youtube.com/watch?v=kSBV5oXmibw#t=50
The video I remember was professionally edited and contained no spoken
text, just music.
Thank you so much in advance.
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JOSE IGNACIO ROYO PRIETO
Matematika Aplikatua Saila
University of the Basque Country UPV/EHU
Alameda de Urquijo s/n
48013 Bilbao
SPAIN
Phone: 00 34 946013987
FAX: 00 34 946014244
E-mail: [email protected]
Web: http://www.ehu.eus/joseroyo
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