airplane propeller,airscrew,prop- a propeller that rotates to push against air vane,blade- flat surface that rotates and pushes against air or water hub- the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes ...
The disclosure refers to a propeller blade for an aircraft engine that includes an airbag system contained inside the blade and comprising at least one bag and at least one gas generator, the at least one gas generator in fluid communication with at least one bag for inflating the bag, a ...
9), which came into service in 1946, is powered by four piston engines, each driving two contra-rotating four-blade pusher propeller through a long shaft and gear box [16]. The YB-35, on the other hand, is powered by jet engines. Both the XB-35 and the YB-35 were unstable with ...
螺旋桨毂螺旋桨飞机叶片(propeller-hub-prop-aircraft-blade) 资源编号 :43325729 格式:jpg 文件体积 :2m 分辨率 :4752 x 3168 爱给网提供海量的高清图库资源素材免费下载, 本次作品为jpg 格式的螺旋桨毂螺旋桨飞机叶片(propeller-hub-prop-aircraft-blade), 本站编号43325729, 该高清图库素材大小为2m, 分辨率为47...
My invention relates to a propeller for aircraft such as airplanes, helicopters, dirigibles and the like, and the principal object of my invention is, to provide a propeller which in structure, combines fan blades and a ring or rim having air passageways, in order to develop extremely high....
There are three different actuator disc methods: momentum theory, propeller vortex theory, and blade element theory. Momentum theory simplifies the propeller as a disc with no thickness, and a pressure increment is applied through the disc. The rotation of the slipstream can also be added to the...
Section 15.6 presents the blade element theory, which can be used to estimate thrust, propeller efficiency, and power required to rotate the propeller. 15.1.2 Propeller Configurations Propellers can be mounted in a few ways to an airplane. Three common methods are shown in Figure 15-2; a Trac...
This study concluded that the efficiency of flapping-wing flight is not necessarily greater than that of propeller-driven flight at low Reynolds numbers. Ellington and Usherwood [47] measured the performance of rotors at a Reynolds number range 10,000–50,000. They studied three types of blade ...
The calculated performance of four-, six-, and eight-blade single-rotating propellers has been compared with experimental results for blade angles ranging ... JL Crigler - 《Technical Report Archive & Image Library》 被引量: 9发表: 1944年 PROPELLER FOR AIRCRAFT made of combined materials provided...
The physical clearances between the rotating blade rows and the engine casing are extremely small, for high efficiency. If any distortion of the casing occurs during operation, these clearances could open up and reduce engine performance. Also, physical wear between the rotating and stationary ...