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Along with the Alouette III, the Cheetah was a key product for HAL; experience from manufacturing the type aided in the later development of more advanced indigenous helicopters such as the HAL Dhruv. [5] During the 1990s, HAL developed an armed light attack helicopter based upon the Cheetah, which was given the name Lancer. [6] [7]
These helicopters lack the maneuverability and survivability of a proper attack helicopter, and merely provide a stopgap during the development of the Z-10. The latest armed version, the Z-9W , was introduced in 2005 and has night attack capabilities, with an under-nose low-light TV and infra-red observing and tracking unit.
Basically, as lab frame or reference frame, there are two kinds of conventions for the frames: East, North, Up (ENU), used in geography; North, East, Down (NED), used specially in aerospace; This frame referenced w.r.t. Global Reference frames like Earth Center Earth Fixed (ECEF) non-inertial system.
The helicopter quickly developed a nickname derived from its HU-1 designation, which came to be pronounced as "Huey". The reference became so popular that Bell began casting the name on the helicopter's anti-torque pedals. [1] The official U.S. Army name was almost never used in practice. [9]
The Shinden was ordered into production "off the drawing board" [clarification needed] but only prototypes had flown by the time the war ended. In 1945 in Europe, what may have been the first canard designed and flown in the Soviet Union appeared as a test aircraft, the experimental Mikoyan-Gurevich MiG-8 Utka (Russian for "duck"), a ...
The FAA states "The height–velocity diagram or H/V curve is a graph charting the safe/unsafe flight profiles relevant to a specific helicopter. As operation outside the safe area of the chart can be fatal in the event of a power or transmission failure it is sometimes referred to as the dead man's curve."
On March 7, 2017, Bell Helicopter presented a conceptual, futuristic looking aircraft. The mock-up presented is configured for eight passengers, but will be capable of accommodating up to 12. [1] On top of the aircraft are five "morphing" main rotor blades which aim to allow the tip of each blade to move between different flight regimes. [2]
After initial testing as a pure helicopter, two auxiliary turbojets were added in March 1977. As a helicopter, the XH-59A demonstrated a maximum level speed of 156 knots (289 km/h; 180 mph), but with the auxiliary turbojets, it demonstrated a maximum level speed of 238 knots (441 km/h; 274 mph) and eventually a speed of 263 knots (487 km/h; 303 ...