1. Modern Design Concept Chapter 10

2. Aerodynamic Research Contributions Propulsion Structural Design Monocoque structure Optimum location for the engine nacelles

3. Light Planes Then & Now Most light airplane manufacturers used only very low powered engines and applied them to tube and fabric frames. –Very light sport plane with little real utility Beechcraft had the first truly modern light airplane, figure 8-14 p.234 –175mph on only 185 hp

4. Light Planes Piston engines- dominated general aviation Due to lower cost & fuel efficiency Drag clean up by improving efficiency of airflow- (wheel fairings)

5. Canards Forward mounted horizontal tail arrangement Leading proponents of canard is Burt Rutan Figure 10-7 p. 279

6. Canard PROS –It provides additional lift in the positive direction while performing its primary task of balancing the wing pitching moment –Higher L/D overall airplane –Canard is out of wing downwash; so efficient at high angle of attack

7. Canard CONS –The canard surface will increase in lift and nose-up moment, with increased angle of attack destabilizing –Stability can be provided by the wing, but this requires that the wing always behind the CG in order to give a nose-down moment at increased angle of attack

8. Canard CONS –Center of gravity travel is limited –Horizontal surface mounted forward; the vertical tail must always be aft of the CG

9. Effective Aspect Ratio Devices Tip Shape Effect Endplates Winglets Swept wing

10. Quiz on Chapter 10 Please take out a sheet of paper Include today’s date and your name

11. Quiz on Chapter 10 List one pro and one con of the canard.