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Technical and scientific information
Aeroplanes can fly because of the presence
of air. Air is a gaseous fluid made up of
particles—mostly molecules of nitrogen and
oxygen. An aeroplane is "suspended" in this
fluid by its two wings which generate a
force
called lift
, supporting the aircraft in flight.
The amount of lift depends on the speed of
the aeroplane, the shape of the wing section
and the density of the air.
Lift is generated by the air
particles above the wing moving
faster than those below,
creating a lower pressure over
the top surface of the wing with
the effect of supporting the
aeroplane in flight.
To better help you understand how
aeroplanes fly and the effect of the
air on the wing hold your hand
outside a window on a windy day.
With your hand held flat, tilt the
palm of your hand up slightly (thumb
facing the wind), your hand will be
forced upwards.
TRY IT OUT!
49
Assemble an ultralight aeroplane
Содержание Science & Play TechnoLogic Mechanics Laboratory 75025
Страница 12: ...12 2 4 3 X1 X1 X2 X4 X4 X8 X4 X2 X2 X1 Assembled motor...
Страница 13: ...13 5 90 6 90 1 1 3 1 1 5 3 5 41 10 X1 X1 X1 X2 X3 X4 X3 X2 X1 X3 X2 X1 X1 X1 X1 3 5 41 10...
Страница 16: ...16 10 11 12 3 3 1 1 3 X4 X7 X2 X1 X1 X2 X4 X8 X8 X2 X3 X2 X2 X2 X4 3 Top of the assembled crane...
Страница 19: ...19 1 1 1 2 3 3 3 X6 X1 X2 3 X2 X1 X4 X2 X4 X4 Assembled base 46 In the gym with a barbell...
Страница 20: ...20 3 4 5 1 1 2 2 3 3 1 1 6 6 1 1 3 X6 X2 X1 2 3 X10 X1 X1 6 X1 X1 X1 Final assembled model...
Страница 28: ...28 3 4 1 1 4 4 18 X6 X1 X2 X1 X2 X2 X2 X1 X1 4 18 Front...
Страница 29: ...29 5 6 1 1 3 3 3 X1 X1 X1 X1 X3 X1 X1 X2 X2 3 X1 X1 X1 X1 X1 X1 X2 Front components...
Страница 31: ...31 9 1 1 4 4 41 X4 X1 X1 X1 X4 X2 X1 4 41 Assembled helicopter rotor and blades...