Aircraft Design - Systhesis anh Analysis 2008 Part 13 pptx

... 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 ... in Fig. 11 where the $/stat-mile is plotted for very different sized aircraft. The DC-10 shown is the domestic version, the DC-1 0-1 0. The corresponding ¢/seat stat-mile is shown in the table...

Ngày tải lên: 10/08/2014, 20:20

... similar to Lilienthal's designs. The Eppler 193 is a good section for model airplanes. The Lissaman 7769 was designed for human-powered aircraft. Unusual airfoil design constraints can sometimes ... based on the Sears-Haack results and volume wave drag of the wing with a 15% mark-up for interference and non-optimal volume distributions. For first estimates of the volume-dependent...

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

... 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-flap interactions and for aircraft with ... aviation aircraft or commuters with gear attached to turbo-prop nacelles, the value is usually much larger. Airplane ytrack / fuse dia. (approx) 73 7-2 00 1.39 74 7-2 00 1.67 75...

Ngày tải lên: 10/08/2014, 20:20