aeroplanes, shower curtains and climate change…
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Aeroplanes, shower curtains and climate change…TRANSCRIPT
Aeroplanes, shower curtains and climate change…
Professor Dame Julia King DBE FREng Kingsbury School 15th March 2013
Flight = Lift + Thrust
Lift: curved streamlines = lower pressure
The Peregrine Falcon: aerofoil wings (and more)
Wingspan: 1m Fuel: 100g per day, 10% body mass
Flight = Lift + Thrust
Thrust: Newton’s 3rd Law
Equilibrium Reaction Action
Thrust = Mass x Velocity (MV)
MV
Jet Engine Layout
Compressor Combustion Chamber
Turbine
Shaft
Exhaust Nozzle
mvaircraft mVjet
Climate change
● Business as usual: a high probability of global average temperature rise in excess of 4o, possibly as early as 2060
● Europe 8o warmer,12o on hottest day: London hits summer highs of 50oC
● Maize and wheat yields reduced by up to 40% at low latitudes
● Rice yields down 30% in China, India, Bangladesh, Indonesia
● 2080 40% of the world’s population has less than 3 litres of water a day
Making flight more efficient
Increase lift
More efficient engines Renewable fuel
Reduce weight
Reduce drag
Speed of stoop: 200 mph
Wingspan: 1m
Fuel: 100g per day, 10% body mass
The Peregrine Falcon: drag reduction
Speed of stoop: 200mph
The most expensive aircraft ever: F111
The Bird of Prey?
Reduce drag: the morphing plane
Reduce drag: winglets
VCOM8569
Engine efficiency: sealing
Trent 900 engine
And you could find lots more solutions to making flying more efficient….