Gliders and Flight David Wagner.

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Presentation transcript:

Gliders and Flight David Wagner

Part I: Wing Design

Basic Aircraft Geometry Wing Reference Area Chord (c) Wingspan (b) Aspect Ratio

The 4 Forces of Flight Lift Drag Thrust Weight

The Glider Technique: Gravity as Thrust Velocity Vector (Where the Plane is going)

Optimizing Glider Flight & So,

Optimizing Glider Flight (cont’d) "Type equation here." Thus,

Optimizing the Aspect Ratio

Influence of Wingspan on Aspect Ratio Wing Reference Area: 0.5m 2

Effects of Wingspan and Aspect Ratio on Wing Design Ideal Conditions: - Small Chord - Large Wingspan

Part II: Stability and Egg Placement

Stability and Control ALL motion of an airplane can be described as is the symbol for the centre of gravity of a body ALL motion of an airplane can be described as combinations of yaw, pitch and roll about the CG,

Moments: The Seesaw Problem Student 2 Weight: 300N 6m Student 1 Weight: 600N 6m Without putting Student 1 on a crash diet, how would we balance the seesaw?

Moments: The Seesaw Problem (cont’d) Student 1 Weight: 600N Student 2 Weight: 300N 3m 6m A “moment” is the tendency of a force to twist or rotate a body.

Applying Moments to Glider Stability and Egg Placement Pos’n aft of CG Pos’n on CG Pos’n forward of CG

Optimizing the Position of the Egg for Stability Close to the CG to minimize impact Extreme Cases: Aft: Nose pitches up, aircraft stalls Forward: Nose pitches down, aircraft nose dives

Thank you, and good luck!