Aircraft Design - Systhesis anh Analysis 2008 Part 6 pptx

... similar to Lilienthal's designs. The Eppler 193 is a good section for model airplanes. The Lissaman 7 769 was designed for human-powered aircraft. Unusual airfoil design constraints can sometimes ... NACA 6- Digit Series: 6 3, 2 - 2 1 2 Six- location half width ideal Cl max thickness Series of min Cp of low drag in tenths in % of chord in 1/10 chord bucket in 1/10 of Cl Af...

Ngày tải lên: 10/08/2014, 20:20

... percent for two-engine airplanes, 1.4 percent for three-engine airplanes, and 1 .6 percent for four-engine airplanes. (c) For three- or four-engine airplanes, the two-engine-inoperative net ... version, the DC-1 0-1 0. The corresponding ¢/seat stat-mile is shown in the table of Fig. 12. Although the DC-l 0-1 0 and B747 benefit in ¢/seat-mile from technology improvement, a significa...

Ngày tải lên: 10/08/2014, 20:20

... Multiple Design Point Airfoils One of the difficulties in designing a good airfoil is the requirement for acceptable off -design performance. While a very low drag section is not too hard to design, ... the aircraft C Lmax is reduced. The figure below shows this effect for the DC- 9-3 0. ● The thin trailing edge may be difficult to manufacture. ● Supercritical, and especially shoc...

Ngày tải lên: 10/08/2014, 20:20

... usually much larger. Airplane ytrack / fuse dia. (approx) 73 7-2 00 1.39 74 7-2 00 1 .67 75 7-2 00 1.85 76 7-3 00 1 .67 E-3 Sentry 1 .62 Citation III 1.49 Lear 55 1.25 The drag is then given by: D = ρ/2 {V n } ... aircraft or cargo aircraft that must operate without jet-ways. High wing designs may also be appropriate for STOL aircraft that make use of favorable engine-fla...

Ngày tải lên: 10/08/2014, 20:20