Simulating Flight Wind Tunnel.

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Presentation transcript:

Simulating Flight Wind Tunnel

Four Forces of Flight Wind Tunnel

Factors Affecting Lift Lift is generated by: The wing’s Shape The Angle that it presents to the air Its Velocity (speed) Its Area (how large) The Altitude at which it is flying Equation Lift = CL * A * ½ V2 * R Which of these is variable and which are constants? Wind Tunnel

The Wind Tunnel Wind Tunnel

What is a Wind Tunnel? A tube-like structure in which wind is produced, usually by a large fan. Wind tunnels test models of airfoils (wings, etc.) as well as the entire airplane before they are built, to see if they are safe enough to put on an aircraft for pilots to fly. Wind Tunnel

The Wright Brother’s Wind Tunnel Tested hundreds of shapes Determined best airfoil Renewed confidence Wind Tunnel

Virtually all Aircraft use wind tunnel testing before they are built

NASA 40x80 in Sunnyvale, CA Wind Tunnel

Why Use a Wind Tunnel A wind tunnel is a controlled environment a place where conditions can be kept the same while tests are being performed less expensive to build a model than to build a huge aircraft and then find your idea doesn’t work. Wind Tunnel

Many different sizes Wind Tunnel

Controls Test Section Relative Wind Computer Wind Tunnel

Reviewing Terms Wind Tunnel

Symmetrical Airfoil Establishes Baseline Wind Tunnel

Cambered Airfoil Proves Bernoulli Wind Tunnel

Angle of Attack Wind Tunnel

Speed at Surface Wind Tunnel

Lift Verses Airspeed Wind Tunnel

Assignment From your Wind Tunnel handout, describe as much as you can about the information shown in each area (A through D). Even if you are unsure of some areas, try to recall as much as you can. Wind Tunnel

0.0 0.0 Wind Tunnel

Wind Tunnel

Wind Tunnels make great science projects!