Sikorsky has developed a twin-rotor helicopter
capable of much faster speeds than conventional choppers.Red Bull Flugtag
is a competition for ragtag homemade gliders, held in various cities all around the world. Here's one glider
from Honk Kong; CNN has coverage
of that event. Here's the site
for the American competitions, complete with videos.
That first entry looks more like a bobsled than a glider.
Labels: Curiosities, Science