Lighter than air flying devices
Download
1 / 15

Lighter-Than-Air Flying Devices - PowerPoint PPT Presentation


  • 146 Views
  • Uploaded on

Lighter-Than-Air Flying Devices. Background. Vehicles designed to travel through air are termed aircraft. There are two types of aircraft: 1. those that fly through the air 2. those that float in air. Hot air balloons and helium airships float in air.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Lighter-Than-Air Flying Devices' - mendel


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Background
Background

  • Vehicles designed to travel through air are termed aircraft.

  • There are two types of aircraft:

  • 1. those that fly through the air

  • 2. those that float in air.

  • Hot air balloons and helium airships float in air.

  • The density of these aircraft is less than the density of the air itself.

  • These aircraft which stay afloat by the buoyant force of air, are called lighter-than-air aircraft.



  • Hot air balloons use propane tanks to heat the air in the envelope, or fabric part, of the balloon.

  • As this air is heated, it expands and becomes less dense than the surrounding air, allowing the balloon to rise off the ground and floats in the air.

  • Gas balloons are filled with a low-density gas.



Activity one
Activity One Hindenburg.

  • What is this object called?

  • How does a hot air balloon move?

  • Does it fly through air or float in the air?

  • What do you think helps the balloon to float in the air?

  • What is the envelope, or fabric part, of the balloon filled with?

  • What do you know about hot air?




  • Test your predictions. placed beneath one bag.

  • Describe on 2.3.3.

  • The air in the bag with the lamp under it will warm from the heat of the light bulb.

  • As it warms, the air expands, becoming less dense than the air surrounding it and the air in the other bag.

  • As a result, this end of the balance scale will rise as the bag begins to float.


Activity two
Activity two placed beneath one bag.

  • What is this object called?

  • How does it move?

  • Does it fly through air or float in air?

  • What do you think helps the blimp to float in air?

  • What is the blimp filled with?

  • What do you know about helium?


Heliu m
Heliu placed beneath one bag.m

  • Helium Balloon-Helium is less dense that air therefore it floats.

  • Lighter than air aircraft have special controls to manage their motion through air.

  • They are able to float at different altitudes depending on how the pilot controls the density of the aircraft.




ad