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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

MV

Equilibrium

Reaction

Thrust = Mass x Velocity (MV)

Action


Jet Engine Layout

Compressor

Combustion Chamber

Exhaust Nozzle mVjet

mvaircraft Turbine Shaft


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 drag Reduce weight


The Peregrine Falcon: drag reduction

Speed of stoop: 200 mph Wingspan: 1m Fuel: 100g per day, 10% body mass

Speed of stoop: 200mph


The most expensive aircraft ever: F111


The Bird of Prey?


Reduce drag: the morphing plane


Reduce drag: winglets


Engine efficiency: sealing

Trent 900 engine

VCOM8569


And you could find lots more solutions to making flying more efficient‌.

Aeroplanes, shower curtains and climate change…  

Aeroplanes, shower curtains and climate change…

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