All over the world, at airports large and small,
Jet and propeller driven planes large and small waiting
to take passengers and/or cargo
from point A to point B.
The fact that little planes can become airborne
is amazing let alone these giants of the sky.
My current favourite plane is the Boeing 787,
the lightest of which weighs 229 Tonnes,
yet is still able to lift around 242 to 335 passengers,
their luggage and fuel for the journey,
with relative ease.
All thanks to Bernoulli’s Principle.
Daniel Bernoulli recognised that the shape of a wing
helped lift a plane into the air because
air passing over the curved top of the wing
has to travel faster to achieve the same distance
as air passing under the straight bottom of a wing.
Fast moving air equals low air pressure
on top of the wing while the reverse
is true of air passing under the wing.
Higher air pressure under the wing assists
a plane to lift off the ground and stay airborne.
At slower take off and landing speeds flaps are
extended forward and aft to increase
the distance air has to travel over the wing
and therefore increases lift as well.
At least that is my assumption.
Although I have sourced Wiki for today’s post,
I also taught a ‘Flight’ unit to Grade 3 & 4 students
during a placement while studying
my primary teaching degree….and still remember it.