Πέμπτη 20 Οκτωβρίου 2016

Bell Boeing V-22 Osprey in Action - Cargo Lift (Footage Compilation)



Footage Compilation of Bell Boeing V-22 Osprey in cargo lifting procedures and active duty.

The Boeing / Bell V-22 Osprey is a cross between a military transport plane and a helicopter. Its formula tilt-rotor allows it to take off and land vertically, like the transport helicopters it is meant to replace.

The V-22 originated from the United States Department of Defense Joint-service Vertical take-off/landing Experimental (JVX) aircraft program started in 1981. The team of Bell Helicopter and Boeing Helicopters was awarded a development contract in 1983 for the tiltrotor aircraft. The Bell Boeing team jointly produce the aircraft. The V-22 first flew in 1989, and began flight testing and design alterations; the complexity and difficulties of being the first tiltrotor intended for military service in the world led to many years of development.

The United States Marine Corps began crew training for the Osprey in 2000, and fielded it in 2007; it supplemented and then replaced their Boeing Vertol CH-46 Sea Knights. The Osprey's other operator, the U.S. Air Force, fielded their version of the tiltrotor in 2009. Since entering service with the U.S. Marine Corps and Air Force, the Osprey has been deployed in transportation and medevac operations over Iraq, Afghanistan, Libya and Kuwait.

The Osprey is the world's first production tiltrotor aircraft, with one three-bladed proprotor, turboprop engine, and transmission nacelle mounted on each wingtip. It is classified as a powered lift aircraft by the Federal Aviation Administration. For takeoff and landing, it typically operates as a helicopter with the nacelles vertical and rotors horizontal. Once airborne, the nacelles rotate forward 90° in as little as 12 seconds for horizontal flight, converting the V-22 to a more fuel-efficient, higher speed turboprop aircraft. STOL rolling-takeoff and landing capability is achieved by having the nacelles tilted forward up to 45°. Other orientations are possible. It has a ferry range of over 2,100 nmi. Its operational range is 1,100 nmi.

Composite materials make up 43% of the airframe, and the proprotor blades also use composites. For storage, the V-22's rotors fold in 90 seconds and its wing rotates to align, front-to-back, with the fuselage. Due to the requirement for folding rotors, their 38-foot diameter is 5 feet less than optimal for vertical takeoff, resulting in high disk loading. Most missions use fixed wing flight 75% or more of the time, reducing wear and tear and operational costs. This fixed wing flight is higher than typical helicopter missions allowing longer range line-of-sight communications for improved command and control.

Heat from the V-22's engines can potentially damage the flight decks of ships. Naval Air Systems Command (NAVAIR) devised a temporary fix of portable heat shields placed under the engines, and determined that a long-term solution would require redesigning decks with heat resistant coating, passive thermal barriers, and ship structure changes. Similar changes are required for F-35B operations. In 2009, DARPA requested solutions for installing robust flight deck cooling. A heat-resistant anti-skid material called Thermion has been tested on USS Wasp.

Source: https://en.wikipedia.org/wiki/Bell_Boeing_V-22_Osprey

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