aeronautics 1110x 1c-slides

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Prof. dr. ir. Jacco Hoekstra Ballooning Introduc)on to Aeronau)cal Engineering J. Bon CC BY

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Aeronautics 1110x 1c-slides

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Page 1: Aeronautics 1110x 1c-slides

Prof.  dr.  ir.  Jacco  Hoekstra  

Ballooning  

Introduc)on  to  Aeronau)cal  Engineering  

J.  Bon  -­‐  CC  -­‐  BY  

Page 2: Aeronautics 1110x 1c-slides

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  ?   ?   ?  

Page 3: Aeronautics 1110x 1c-slides

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  

Page 4: Aeronautics 1110x 1c-slides

KongMing  lantern  

-­‐  China:  200  –  300  AD  

-­‐  First  hot  air  balloons  

P.  Dunleavy  -­‐  CC  -­‐  BY  

Page 5: Aeronautics 1110x 1c-slides

First  manned  flight  

-­‐  Balloon  flight  was  first  manned  flight  -­‐  Only  way  to  fly  for  over  a  century  

Joseph-­‐Michel  Montgolfier   Jacques-­‐ÉRenne  Montgolfier  

Page 6: Aeronautics 1110x 1c-slides

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  

Page 7: Aeronautics 1110x 1c-slides

19th  and  20th  century  air  travel  

Page 8: Aeronautics 1110x 1c-slides

End  of  the  airship  era  (1937)  

Page 9: Aeronautics 1110x 1c-slides

Today’s  airships  

Advantages:  -­‐  Efficient,  if  staRonary  -­‐  Can  go  very  high  

Disadvantages:  -­‐  Slow  -­‐  High  drag  

A.  Malone  -­‐  CC  -­‐  BY  

Page 10: Aeronautics 1110x 1c-slides

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  

Page 11: Aeronautics 1110x 1c-slides

Gas  law  

p V n T⋅ = ⋅ℜ⋅

Page 12: Aeronautics 1110x 1c-slides

Ballooning  

Mary  -­‐  CC  -­‐  BY  -­‐  NC  -­‐  SA