Advancing Blade
That half of
the rotor disc in which the rotation of the blade is moving in the
same direction as the movement of the helicopter. If the helicopter
is moving forward, the advancing blade will be in the right half of
the rotor disc; if moving backward, it will be in the left half; if
moving sideward to the left, it will be in the forward half; and if
moving sideward to the right, it will be in the rear
half.
Aero-Linx: Biplanes vs.
Monoplanes
Ever wondered why modern airplanes only have one set of wings?
You may have heard that it's more efficient than the old biplanes,
but why is that? And why do sail planes have those long thin wings?
There are actually two significant reasons that a monoplane is more
efficient aerodynamically than a biplane or a triplane (or any
number of stacked wings if you're really ambitious), which are
discussed...
"Any teacher from anywhere in the country can submit a
proposal to fly an experiment. It doesn't matter if you teach
kindergarten or advanced placement in high school. What better way
to make science and math come alive? We can't wait to see the
experiments educators and their students propose."
Source: Cindy McArthur, 'Teaching From
Space' project manager, in commwents associated with the
announcement that for the first time, NASA is offering
teachers from across the country an opportunity usually reserved
for researchers -- the chance to design a science experiment and
then test it aboard a microgravity research plane.
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