Search results
Results from the WOW.Com Content Network
This three-engined helicopter has a single large main rotor and smaller tail rotor. On a helicopter, the main rotor or rotor system is the combination of several rotary wings (rotor blades) with a control system, that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic ...
The tail rotor has about the same diameter and thrust as the four-bladed main rotor fitted to the MD Helicopters MD 500. [ 6 ] The Mi-26's unique main gearbox is relatively light at 3,639 kg (8,023 lb) [ 7 ] but can absorb 14,700 kilowatts (19,725 shp), which was accomplished using a non-planetary, split-torque design with quill shafts for ...
The Bell UH-1 Iroquois is a utility helicopter designed for military use. It has a metal fuselage of semi-monocoque construction with tubular landing skids and two rotor blades on the main rotor. [23] Early UH-1 models featured a single Lycoming T53 turboshaft engine in versions with power ratings from 700 to 1,400 shp (522 to 1,040 kW). [7]
Airbus Helicopters is responsible for the H175's main gearbox, tail rotor, avionics, autopilot, hydraulic and electrical systems, doors and transparencies. Airbus Helicopters is also the technical lead and system integrator, and built two of the three prototypes (the first and third).
The test program was broken down into stages as the Bo 105 comprised a new airframe, new rotor system, and a new engine; thus the flying Bo 105 prototype was initially equipped with a main rotor from Westland Helicopter's Scout rotorcraft and a pair of Allison Model 250 turboshaft engines instead of their production counterparts. [7]
The helicopter is categorized as a single-pilot IFR Category A. It is capable of operating with one engine inoperative. The main transmission is rated for 5,000 hours between overhauls and the tail rotor gearbox is rated for 3,200 hours.
The principal amongst these changes was the repositioning of the tail rotor from the helicopter's left side to the right, which facilitated an increase in the effectiveness of the tail rotor. [11] The AH-1 was the first U.S. Army helicopter not named for a Native American people since the practice began with the H-13 Sioux and continued with ...
If the engine fails, the freewheeling unit automatically disengages the engine from the main rotor, allowing the main rotor to rotate freely. The most common reason for autorotation is an engine malfunction or failure, but autorotation can also be performed in the event of a complete tail rotor failure, or following loss of tail-rotor ...