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An accelerometer is an apparatus, either mechanical or electromechanical, for measuring acceleration or deceleration - that is, the rate of increase or decrease in the velocity of a moving object.
Accelerometers are used to measure the efficiency of the braking systems on road and rail vehicles; those used in aircraft and spacecraft can determine accelerations in several directions simultaneously. There are also accelerometers for detecting vibrations in machinery.
 Research Accelerometer
Deceleration is the rate at which a moving body decreases in velocity.
Research Deceleration
The FA2 is a version of the Harrier FA2 (Sea Harrier) in service with the British Royal Navy. The aircraft is able to detect and destroy threats before the launch of an attack using long range weapon systems with look-down and shoot-down tactical capability. Its primary mission is to provide air defence for the navy carrier battle fleet particularly against low-flying attack aircraft armed with long range air-to-surface missiles. The design of the aircraft is optimised for air-to-air combat with secondary missions of surveillance and air-to-sea and air-to-ground attack. The FA2 is equipped with the AIM-120A AMRAAM (Advanced Medium Range Air-Air Missile). The AIM-9 (M and L variants) Sidewinder air-to-air missile provides the Harrier with capability for firing close range at an approaching enemy aircraft in a dog fight. The Sidewinder M and L variants have an all-aspect active optical seeker, a blast fragmentation warhead and high resistance to countermeasures.
The Sea Harrier's anti-ship missile is the Sea Eagle. The single turbofan engine isthe Rolls-Royce Pegasus Mark 104 or Mark 106 which has four rotatable cascade-type exhaust nozzles. For take-off the nozzles are initially in the fully aft position and then they are rotated partially downwards for lift off and acceleration. Viffing (vectoring in forward flight), a form of advanced combat manoeuvres developed by V/STOL pilots, is achieved by vectoring the nozzles at high speed for sudden deceleration and very tight turns. The 2,800 litres of fuel is stored in five tanks in the fuselage and two wing tanks, and provision is made for in-flight refuelling.
Research Harrier FA2
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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