Search results
Results from the WOW.Com Content Network
Intermeshing rotored helicopters have high stability and powerful lifting capability. The latest Kaman K-MAX model is a dedicated sky-crane design used for construction work, and has been modified for trials by the USMC as an optionally-unmanned cargo transporter. Unmanned aerial vehicles with intermeshing rotors have also been flown. [2]
The number of rotors is also important, many helicopters have two rotors in a single line, and another configuration is 4 rotors. [22] An example of two-blade rotor is the Bell 212 , and four blade version of this helicopter is the Bell 412 . [ 23 ]
This page was last edited on 29 October 2024, at 13:30 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Rotorcraft generally include aircraft where one or more rotors provide lift throughout the entire flight, such as helicopters, autogyros, and gyrodynes. Compound rotorcraft augment the rotor with additional thrust engines, propellers, or static lifting surfaces. Some types, such as helicopters, are capable of vertical takeoff and landing.
The S-72 in flight without a main rotor in 1984. Sikorsky and Bell Helicopters competed for the RSRA contract. [1] Bell's preferred proposal was the "Bell 646A" with rotors based on the Bell 240 UTTAS; the alternative was the smaller "Bell 646B" based on the Bell 309 KingCobra. [2]
A coaxial-rotor aircraft is an aircraft whose rotors are mounted one above the other on concentric shafts, with the same axis of rotation, but turning in opposite directions (contra-rotating). This rotor configuration is a feature of helicopters produced by the Russian Kamov helicopter design bureau.
See also Category:Tiltrotor aircraft, which usually have a transverse-rotor configuration. Pages in category "Transverse rotor helicopters" The following 17 pages are in this category, out of 17 total.
The UH-1H's dynamic components include the engine, transmission, rotor mast, main rotor blades, tail rotor driveshaft, and the 42-degree and 90-degree gearboxes of the tail rotor. The main rotor transmission consists of a 90 degree bevel gear assembly with a reduction ratio of 2.14:1, followed by a 2-stage planetary gearset with a ratio of 9.53 ...