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[3] [4] Airports in the 1960s used jet blast deflectors with a height of 6 to 8 feet (1.8 to 2.4 m), but airports in the 1990s needed deflectors that were twice as high, [5] and even up to 35 feet (11 m) high for jet airliners such as the McDonnell Douglas DC-10 and MD-11, which have engines mounted in the tail above the fuselage. [1]
In NASA's engineering design life cycle, design reviews are held for technical and programmatic accountability and to authorize the release of funding to a project. [10] A design review provides an in-depth assessment by an independent team of discipline experts and managers that the design (or concept) is realistic and attainable from a ...
Target-type thrust reversal, particularly this design, was invented in 1968. This invention is stated to be an improvement to previous design. [2] As early as 1963, an invention called "two part thrust reversal" appeared with a similar deflector door design.
An Airbus A380 deploying thurst reverser while landing, blowing water from the wet surface and making the reversed air flow observable.. Thrust reversal, also called reverse thrust, is the temporary diversion of an aircraft engine's thrust for it to act against the forward travel of the aircraft, providing deceleration.
A muzzle shroud, linear compensator, blast shield, forward blast diverter or concussion reduction device (CRD) is a sleeve (either circular or otherwise) that attaches to and extends beyond the muzzle of a firearm in order to redirect some of the noise and concussion, or shock wave, from the muzzle blast forward and away from the shooter, and ...
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Jet noise may be reduced by adding features to the exit of the nozzle which increase the surface area of the cylindrical jet. Commercial turbojets and early by-pass engines typically split the jet into multiple lobes. Modern high by-pass turbofans have triangular serrations, called chevrons, which protrude slightly into the propelling jet.
A blast pen and memorial at the former RAF Kenley A Hawker Hurricane in a revetment at RAF Wittering in 1940. A blast pen was a specially constructed E-shaped double bay at British Royal Air Force (RAF) Second World War fighter stations, being either 150 ft (46 m) or 190 ft (58 m) wide and 80 ft (24 m) front-to-back, accommodating aircraft for safe-keeping against bomb blasts and shrapnel ...