Full of Hot Air
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Transcript of Full of Hot Air
HOTAIRFULL OF
HOTAIRFULL OF
Exhibition by: Melissa Mild
Saint Louis, Missouri
Full of Hot Air
Melissa Mild
P.O Box 510284
Saint Louis, MO 63151-0452
Copyright ©2013 by Melissa Mild
All right reserved. No part of this book may be
reproduced, in any form or by any means, without the
permission in writing from the publisher except in the
case of brief quotations. For information or request
please be directed to the above address.
Printed in the United States of America
“Believe in yourself. Have faith in your abilities.
Without a humble but reasonable confidence in your
own powers you cannot be successful or happy.”
Norman Vincent Peale
CONTENTSWEATHER
PARTS
RISING UP
HISTORY
10
12
14
22
Hot air balloons are based on a very basic principle: warmer air rises in cooler air. Essentially, hot air is lighter than cool air.
However, if you actually need to get somewhere, a
hot air balloon is a fairly impractical vehicle. You can’t
really steer it, and it only travels as fast as the wind
blows. If you simply want to enjoy the experience
of flying, there’s nothing quite like it. Many people
describe flying in a hot air ballo on as one of the most
serene, enjoyable activities they’ve ever experienced.
FOREWORD
WEATHERCHECK THE
BEFORE LAUNCHING
Before launching, pilots will call a weather service
to find out about climate and wind conditions in
an area. Cautious pilots only fly when the weather
is close to ideal, when skies are clear and wind
conditions are normal.
10
Storms are extremely hazardous for
hot air balloons, because of the danger of
a lightning strike.
Even rain is a problem, because it decreases visibility
and damages the balloon material. Even while you
need a nice wind current to have a good flight, very
strong winds could easily wreck the balloon.
11
PARTSESSENTIAL
OF A HOT AIR BALLOON
12
The 3 main parts of a hot air balloon:A hot air balloon is composed of 3 different parts
that in which the balloon could not fly. The envelope
which is the actual fabric balloon which holds the air.
The burner which is the unit that propels the heat
up inside the envelope and the basket in which the
passengers and pilot stand.
Parachute Valve:Hole used to deflate
the balloon
13
Basket: Carries the passengers
Burner: Heats the air
Propane Tanks
Skirt:Deflects wind
from burner flame
Panels
Balloon Envelope:Holds hot air
RISING UPTHE PROCESS OF
14
Once the crew has found a suitable launching
point, the balloon envelope is laid flat on the
ground and with the use of a powerful fan, the
envelope is inflated with cool air.
The air particles are moving at the same rate
in and outside of the balloon.
STEP 1
COOL AIR
15
When the balloon is completely inflated with cool
air the crew will turn the burner on to heat the air inside the balloon.
The air particles inside the balloon are starting
to move more quickly and the air is becoming less
dense as the air is heated.
STEP 2
MOVING SLOWER
MOVING FASTER
16
The envelope is now fully heated and the balloon
will begin to rise off the ground.
As the air particles become less and less dense, it
causes the balloon to rise against the more dense
air around it. Essentially hot air rises in cool air.
STEP 3
HOT AIR
COOL AIR
17
Now to keep the balloon rising in the air the
pilot must control the amount of heat that
is released from the burner into the envelope.
The pressure in the air creates an upward force against gravity which causes the buoyant force
of air.
STEP 4
GRAVITY:Downward Force
AIR PRESSURE:Upward Force
18
When ready to land, the crew will search out a
suitable site and will then release the hot air slowly
to lower the balloon back to the ground.
The release of hot air will cause the air particles
to slow down and become more dense again.
STEP 5
HOT AIR:Releases from valve
19
Once the balloon has safely landed on the ground
the crew will pack up.
Air particles are back to normal and are the
same density throughout. The balloon will now stay
on the ground until the air is reheated.
STEP 6
20
21
AIR PARTICLES ARE MOVING THE SAME
HISTORYBALLOONING HISTORY
The sheep, duck and chicken became the first balloon passengers on Sept. 19, 1783, in the Montgolfier brothers first demonstration
flight for King Louis XVI. They all survived the trip,
giving the King some assurance that human
beings could breath the atmosphere at the higher
elevation. Two months later, Marquis Francois
d'Arlandes, a major in the infantry, and Pilatre de
Rozier, a physics professor, became the first human
beings to fly.
22
100 ft10,00 ft
40,00 ft50,00 ft
70,00 ft
3,000 ftHot air balloons
usually fly between
500 ft and 3,000 ft.
12,500 ftThe FAA allows a hot air
balloon to reach 12,500 ft
for safety reasons. After this
height pilots must have
oxygen on board.
42,000 ftThe highest recorded
balloon flight, at the
time, set by U.S.
Army Corps Captain
Hawthorne C. Gray in 1927.
He died on the descent
from lack of oxygen.
45,000 ftCruising height for
commercial airplanes.
70,000 ftIn a pressurized cabin,
Vijaypat Singhania of India
set the world record in 2005
for highest balloon flight,
reaching an altitude of 69,986
feet. Temperatures dipped to
the minus 135 degrees.
The Exhibition Full of Hot Air was designed and
printed by Melissa Mild. This book was printed at
UMSL computer lab on the laser jet printer. While
making this book the information used to explain the
processes came from: www.howstuffworks.com