Friday, April 11, 2008

Hot air balloons are filled with air instead of helium.


How does the handler "pilot" his airship? That is, how does the pilot get the balloon to go up into the sky? How does the pilot get the balloon to descend to the ground? Explain how the pilot travels north, south, east or west. What kind of control do they have over this?


A hot air balloon pilot increases the flame by turning up the flow of gas, which increases vertical speed. Hot air balloons also have a cord to open the parachute valve at the top of the envelope. When the pilot pulls the attached cord, some hot air can escape from the envelope, decreasing the inner air temperature. This causes the balloon to slow its ascent. If the pilot keeps the valve open long enough, the balloon will sink. To move the aircraft north, south, east, or west the pilot either ascends or descends in altitude to catch different wind currents.


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