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Hot Air Balloons

Hot Air Balloons. Tejvir And Baljyot. History of Hot Air Balloons. Oldest human carrying flight that was successful The first hot air balloon flight was in 1783. First flight was referred to as Aerostat Reveillon, as the passengers were a sheep, a duck and a rooster.

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Hot Air Balloons

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  1. Hot Air Balloons Tejvir And Baljyot

  2. History of Hot Air Balloons • Oldest human carrying flight that was successful • The first hot air balloon flight was in 1783. • First flight was referred to as Aerostat Reveillon, as the passengers were a sheep, a duck and a rooster. • The first human flight was about 2 months later in Paris with the balloon made by 2 French brothers, the balloon stayed up in the air for about 20 minutes before coming down.

  3. Continued… • Later that year, the world’s first balloonist was killed when crossing the channel as the hydrogen balloon and hot air balloon were tied together to experiment. • Joseph and Ettiene Montgolfier, the 2 French brothers, discovered that the hotter the air was the more the hot air balloon rose.

  4. What is a Hot Air Balloon • It is a large balloon aircraft made of fabric which is filled with air that is later heated to make the balloon rise • Modern hot air balloons are heated by a small propane heater which is placed under a small opening to the balloon • A basket is suspended under the balloon to carry passengers • As the air heats up, it becomes lighter then the air outside, causing a lift

  5. Parts of a Hot Air Balloon • Envelope – the actual fabric part of the balloon that is made of nylon or polyester. Both materials have their advantages and disadvantages. The fabric is woven and coated with a sealant that keeps the air inside the balloon. The 2 most important parts of the envelope are the parachute and the rip panel which allow the balloon to descend. Both these parts are made of fabric similar to the envelope. • Basket – The actual part that carries the passengers, bottom is usually made of plywood, sides made of leather, suede, or rawhide and the basket is made of rattan/willow woven together • Burner – Propane burner fuelled by 2 or more tanks, they join to the burner by a hose coupling. Allows the lift of the hot air balloon

  6. Hindenburg Disaster • Large German airship that was used for commercial purposes to carry passengers, basically like a blimp • Designed by the Zeppelin company • On May 6 1937, in Lakehurst, New Jersey, the Hindenburg was scheduled to land but was having a little trouble • Onlookers said they saw a flame burst out from the back and within 34 seconds the entire ship was in flames • We used this as an example because the fire was caused by a hydrogen leak ignited by static electricity, this is similar to the hot air balloon because the first human flight on it burned down due to hydrogen as well.

  7. How do they work • We know hot air rises, as your bedrooms upstairs are warmer then your basement. • By heating up the air inside the balloon, it forces the balloon to rise, as the air inside is warmer then the air outside • Using propane burners, the air is heated causing the balloon to rise • A valve on top of the balloon is used to release air, when the balloon needs to go down. • Wind travels in different directions at various altitudes, so which way the balloon goes is not up to the pilot, he has very little control.

  8. Law Relation • Joseph Gay-Lussac. • As temperature increases when the propane tanks turn on, the pressure of the air inside the balloon increases as well causing a lift. • Because the pressure increases, air molecules are moving at a much faster rate • Less air particles in the balloon then outside air making it lighter.

  9. Kinetic Molecular Theory When temperature of a gas container is increased, the average kinetic energy of the gas particles increases. As a result, the pressure increases at a constant volume. As temperature increases, particles collide against the walls of the envelope more. This is because as the temperature increases, the speed of the movement of the particles increases, meaning the pressure is increasing because there is more collisions. This helps us to explain why the air balloon goes up and down.

  10. Video http://videos.howstuffworks.com/howstuffworks/43-how-hot-air-balloons-work-video.htm

  11. http://dontbesohumble-youarenotthatgreat.blogspot.com/ • http://spacecollective.org/DionicioValdez • http://www.littleclickers.com/balloons0808.html

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