Assignment AMT 411

Copy or download the assignment for AMT 411.

Due date is July 28, 2009; 10 AM


Direction: Read and understand each number before answering.

1.1 FoilSim for aerodynamic calculations (courtesy of NASA).

Set the following on the FoilSim airfoil panel: airspeed, 200 mph; altitude, 5,000 ft.; camber, 0; angle, 2.5°; and surface area, 300 sq. ft.

(a) Set the velocity to 50 mph and record the lift. Increase the airspeed slider to 100 mph. Record lift. Increase the velocity to 150 mph and record lift again. Finally increase the velocity to 200 mph and record lift. Describe the change that you observe in lift as velocity changes. Graph velocity versus lift by hand for these points.

(b) Set the angle at 2.5° and record lift. Repeat, setting the angle for 5.0°, 7.5°, and 10° and record the lift for each setting. Graph your results by hand. At what point will the airfoil not turn a flow? Complete your graph with a stall at an angle of 12°. Will lift be generated at an angle of 0°? Explain.


(c) Return the angle setting to 2.5° and set the surface area to 100 cu. ft. Record the value for lift. Double the surface area. How is lift affected? Record lift. Double the surface area two additional times and record lift. Graph lift versus surface area from the data recorded. Explain how an airplane can slow its velocity for landing and still maintain sufficient lift to avoid a stall.

(d) Set the camber at 0. Record lift. Increase camber to 0.25, 0.30, 0.35, 0.40, 0.45, and 0.50, and record the changes in lift for each setting. Graph camber versus lift with the data recorded. Is it possible for camber adjustment to initiate a stall? Explain.


Click here to go to the FOIL SIM WEBSITE

(Note: Your PC or Laptop should be Java enabled to use FOIL SIM. If it is not Java enabled, download JAVA here: http://www.java.com/en/download/manual.jsp)



If you want to work at home without internet connection, download the file below


AMT 411 ASSIGNMENT


The folder consists of the following:

FOIL SIM applet

WinRAR

Java Plug in

Copy of the assignment in both MS Word 2003 and 2007 versions



To install FOIL SIM:

1. Unrar the file using winRAR

2. Double click set up

3. Follow installation instructions in the pop up box

4. After installation, double click the FOIL SIM icon.