Coast to coast, our 8th Grade group from San Diego, California is heading to the east side to experience American history and culture. This blog serves as our academic mobile journal of our adventure.
Friday, May 27, 2011
Thrust is the force that propels a flying machine in the dorection of motion. Engine produces thrust.
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The four forces of flight are lift, drag, thrust, and weight. The wings of an aircraft create lift. Wings have rounded front edges because air flows well over rounded edges, whereas sharp edges disrupt the airflow. Wings lift the airplane because there is a different pressure level on top of the wing than t there is on the bottom. Drag is created when an object in the air disrupts the airflow, creating friction with the air. The more aerodynamic an object is, the less drag it creates. Thrust is the forward motion an object needs to get lift. The thrust of an airplane comes from its jets. The last force is weight. Weight affects flight because the heavier an object is, the more lift and thrust it needs to become airborne.
Sophie. Science
Sophie. Science
Otto Litienthal created a hang glider design that was inventive and successful. It had broad wings that folded easily for storage. It could be controlled by the flyer shifting his weight back and forth, moving the glider's center of gravity. It could go up to 1150 feet in the air. Its maneuverability and the massive lift given by its cotton covered wings were used by the wright brothers as they designed the world's first airplane.
-sophie. science.
-sophie. science.
This is where the lilienthal hang glider is. It was invented by Otto Lilienthal in 1894. It worked like this: the wing and tail surfaces are covered with doped cotton cloth and a horizontal stabilizer is connected to the frame by a pivot at the front of the rudder. The wing folded rearwards for storage and transporting, and the pilot went between the 2 wings./// Ibrahim
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