Reverse engineering and refurbishing of an Mi-24 helicopter main gear box [PDF]
, 2016 The Mi-24 helicopter is one of the most famous heavy lift helicopters designed with a net weight of 8.4 tonnes, while its gross weight is 12.5 tonnes. This helicopter is powered by two TV3-117 turbo-engines, coupled to a VR-24 main rotor transmission ...
Zimuto, Israel
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Flexibility effects on tooth contact location in spiral bevel gear transmissions [PDF]
An analytical method to predict the shift of the contact ellipse between the meshing teeth in a spiral bevel gear set is presented in this report. The contact ellipse shift of interest is the motion of the nominal tooth contact location on each tooth ...
Altidis, P. C., Savage, M.
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Variable pitch fan system for NASA/Navy research and technology aircraft [PDF]
Preliminary design of a shaft driven, variable-pitch lift fan and lift-cruise fan was conducted for a V/STOL Research and Technology Aircraft. The lift fan and lift-cruise fan employed a common rotor of 157.5 cm diameter, 1.18 pressure ratio variable ...
Black, D. M., Ryan, W. P., Yates, A. F.
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The designing and modeling of equal base circle herringbone curved bevel gears. [PDF]
Sci Rep, 2023 Zhang R, Zhang B, Fu S.
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Development of small bore, high speed tapered roller bearing [PDF]
The performance of four rolling bearing configurations for use on the input pinion shaft of a proposed commercial helicopter transmission was evaluated.
Bovenkerk, R. L. +2 more
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Advances in Climbing Robots for Vertical Structures in the Past Decade: A Review. [PDF]
Biomimetics (Basel), 2023 Fang G, Cheng J.
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Experimental Method of Machining Gears with an Involute Profile Using CNC Lathe with Driven Tools. [PDF]
Materials (Basel), 2022 Gołębski R.
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Computerized Design and Generation of Low-Noise Gears with Localized Bearing Contact [PDF]
The results of research projects directed at the reduction of noise caused by misalignment of the following gear drives: double-circular arc helical gears, modified involute helical gears, face-milled spiral bevel gears, and face-milled formate cut ...
Chen, Jui-Sheng +4 more
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Manufacturing of screw rotors via 5-axis double-flank CNC machining [PDF]
, 2020 We investigate a recently introduced methodology for 5-axis flank computer numerically controlled (CNC) machining, called double-flank milling [1]. We show that screw rotors are well suited for this manufacturing approach where the milling tool possesses
Barton, M., Bizzarri, M.
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Rotor systems research aircraft predesign study. Volume 4: Preliminary draft detail specification [PDF]
The RSRA requirements are presented in a detail specification format. Coverage of the requirements includes the following headings: (1) aircraft characteristics, (2) general features of design and construction, (3) aerodynamics, (4) structural design ...
Linden, A. W., Miller, A. N.
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