Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
Veni, vidi, teenie weenie yellow polka dot bikini.

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.

user:
pass:
register,


 

Gyroscope Pedestrian Overpass

Suspend a gyroscope with a platform on the end above traffic intersections.
  (+3)
(+3)
  [vote for,
against]

Pedestrians step off sidewalk corner staircases onto the platform, which precesses according to simple gyroscopic motion. Set the spinning weight going such that precession is counterclockwise when viewed from above. Pedestrians get off when they reach the raised platform of the sidewalk at the other side.

The rotational energy of the spinning weight on the gyroscope arm will decrease with friction, so electric motors are built into the arm to maintain angular velocity. A balancing mass capable of moving closer or farther from the gyroscope's center could ensure a relatively consistent angular velocity of precession by moving closer or farther from the center of the traffic intersection (i.e. lengthening or shortening the moment arm).

Ketchupybread, Dec 14 2008

[link]





      
[annotate]
  


 

back: main index

business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle