aeronautics 1110x 1c-slides
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Aeronautics 1110x 1c-slidesTRANSCRIPT
Prof. dr. ir. Jacco Hoekstra
Ballooning
Introduc)on to Aeronau)cal Engineering
J. Bon -‐ CC -‐ BY
Three principles of flight Push air down Push something
else down Float on air by being lighter
He
Solid fuel rocket
Nozzle
Solid propellant
Liquid fuel rocket
Oxidizer
Fuel ? ? ?
Three principles of flight Push air down Push something
else down Float on air by being lighter
He
Solid fuel rocket
Nozzle
Solid propellant
Liquid fuel rocket
Oxidizer
Fuel
KongMing lantern
-‐ China: 200 – 300 AD
-‐ First hot air balloons
P. Dunleavy -‐ CC -‐ BY
First manned flight
-‐ Balloon flight was first manned flight -‐ Only way to fly for over a century
Joseph-‐Michel Montgolfier Jacques-‐ÉRenne Montgolfier
First manned flight
-‐ Balloon flight was first manned flight -‐ Only way to fly for over a century -‐ Before humans: Duck, rooster, sheep -‐ First manned flight on Nov 21, 1783
19th and 20th century air travel
End of the airship era (1937)
Today’s airships
Advantages: -‐ Efficient, if staRonary -‐ Can go very high
Disadvantages: -‐ Slow -‐ High drag
A. Malone -‐ CC -‐ BY
AerostaLcs
-‐ Which type of balloon provides more liZ: helium or hot air? -‐ How many helium-‐filled party balloons can you safely carry
without becoming airborne? -‐ How does a balloon feel a liZ force if there is an equilibrium
of forces all across the surface?
-‐ What alRtude can you reach with a balloon?
Mtruch -‐ CC -‐ BY -‐ SA
Gas law
p V n T⋅ = ⋅ℜ⋅
ℜ
Ballooning
Mary -‐ CC -‐ BY -‐ NC -‐ SA