VIEWS: 19 PAGES: 24 POSTED ON: 7/8/2011
Aviation “Gathering Information to solve problems” (Video Part 1) Four Principles/Forces of Flight • Thrust • Lift • Drag • Weight – (gravity) Center of Gravity • The center of gravity is very important in any plane • If the center of gravity is off, the plane will have trouble flying Flight Paths Caused by too much lift, or heavy tail Caused by too much drag, gravity, or a heavy nose Proper flight path Three Directions of Control • Yaw – Rudder (nose rotation - side to side) • Pitch – Elevator ( nose up/down ) • Roll – Ailerons ( wings bank up or down ) Parts of a Plane Every part of a plane has a proper name and function. • Body of plane • Contains cockpit • Carries passengers and/or cargo • Located on tail or stabilizer • Raises or lowers nose of plane • Controls “pitch” • Controlled by stick in cockpit – forward and backward • Located on tail or stabilizer • Moves nose of the plain left and right • Controls the “yaw” • Controlled by foot pedals in the cockpit • Located on back of wings • Rotates or banks the plane • Controls “roll” • Controlled by the stick in the cockpit – left and right • Located on back of wings, usually inside the ailerons • Increase lift • Used during landing to stay up at slow speeds Gliders –vs- Airplanes • What makes a Glider different from an Airplane? • Are the Parts & Control Surfaces of a Glider shaped differently than an Airplane? • If you were to make a Paper Glider would it be constructed differently than a Paper Airplane? • Does it fly differently? WHY? Gliders: Pure Flying Vehicles • Gliders stay aloft by balancing the forces of gravity, lift, drag & thrust • Biggest Enemy is Gravity so Lift comes from surface area under wing, shape of wing & wings’ Angle of Attack Surface Area • To see how surface area works, Your Teachers will roll a piece of paper into a ball. Drop it and the paper falls. • Spread the paper out and drop it, and it will float. • The greater the surface area, the greater the amount of air pushing up on the wing • So how will you increase the S.A. of Yours? Angle of Attack • Angle of Attack is the Orientation of the Wing as it faces into the wind • Wing Structure & Stability will maintain Lift • You will have to Engineer into your Glider the proper Angle of Attack Time To Test Fly… not quite yet! It is time to start designing a GLIDER that will compete in the maximum distance contest. The Problem Defined • Design a Paper Glider that travels the Greatest Distance. • uses one 8 ½ x 11” sheet of paper • No extra items may be added to the glider . • Internet Sites offering Paper Glider Plans • Books showing Glider Plans • Talk to Family Members • You will need to draw several ideas (use worksheets provided) • Construct and record your results (use worksheets provided) • Eventually…You will team up to share ideas/results & compete • No flying Gliders in the Classroom • Your Teachers will have launch sites set up in the Wood Lab to test the Distance & Accuracy of your ideas • Refine ideas in Classroom & Retest in Wood Lab • You will form teams to discuss Individual Ideas and Results • The Team will Pick an Idea to Refine and Prepare for • The Competition will take place in the SGI Are there any questions?
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