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A jet blast deflector (JBD) or blast fence is a safety device that redirects the high energy exhaust from a jet engine to prevent damage and injury. The structure must be strong enough to withstand heat and high speed air streams as well as dust and debris carried by the turbulent air. [ 1 ]
The Sukhoi Su-33 (Russian: Сухой Су-33; NATO reporting name: Flanker-D) is a Soviet/Russian all-weather carrier-based twin-engine air superiority fighter designed by Sukhoi and manufactured by Komsomolsk-on-Amur Aircraft Production Association, derived from the Su-27 and initially known as the Su-27K.
This design places the deflector doors in the bypass duct to redirect only the portion of the airflow from the engine's fan section that bypasses the combustion chamber. [4] Engines such as the A320 and A340 versions of the CFM56 direct the airflow forward with a pivoting-door reverser similar to the internal clamshell used in some turbojets. [11]
However, this result is obtained with a cowl to attach air flow in a 7° angle and a large enough "target" (deflector door) installed. A reverse-thrust ratio of 55% can be reached on a simple target without the cowl. [7] A width to height ratio of 1.6 can provide the maximum performance for cylindrical deflector doors. [6]
Jet blast is the phenomenon of rapid air movement produced by the jet engines of aircraft, particularly on or before takeoff. A large jet-engine aircraft can produce winds of up to 100 knots (190 km/h; 120 mph) [ 1 ] as far away as 60 metres (200 ft) behind it at 40% maximum rated power. [ 2 ]
Among these modification were jet-blast deflectors (JBDs), greater aviation fuel capacity, stronger decks and elevators. Also included were the British innovations of an optical landing system , steam catapults and, ultimately, an angled flight deck .
These types of FOD are very difficult to track and manage once they are introduced onto the airfield. A jet engine intake, engine blast, and propeller or helicopter rotor draft then can pick up the debris easily. This material, once loose around operational aircraft, can lead to serious safety concerns, including personnel injury and equipment ...
The Air Department added several significant changes to the flight deck, including enlarging the jet blast deflectors (JBD) and installing more powerful catapults to handle the new Grumman F-14 Tomcat, which Kitty Hawk was due to receive for its next deployment.