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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. Thrust reverser systems are featured on many jet aircraft to help slow down just after touch-down, reducing wear on the brakes and enabling shorter landing ...
The inventors (one also as inventor of target-type) states that the design can increase the reverse thrust to 50% of the original thrust. [3] In an earlier development in 1954 called "locks for jet thrust reversers", the design for thrust reversal also contain a flap device to help decelerate and the main purpose of the thrust reverser was to ...
This creates reverse thrust for braking or going backwards without the need to change the direction of shaft revolution. While some aircraft have ground-adjustable propellers, these are not considered variable-pitch. These are typically found only on light aircraft and microlights.
Further inventions of note included The Reverse Thrust device, which was made to decrease the specific fuel consumption and to increase the thrust of jet engines. The world's first air bag , meant to ensure the safety of pilots and automobile drivers alike, was designed by Jordanoff in (1957).
Reverse thrust can be generated to aid braking after landing by reversing the pitch of variable-pitch propeller blades, or using a thrust reverser on a jet engine. Rotary wing aircraft use rotors and thrust vectoring V/STOL aircraft use propellers or engine thrust to support the weight of the aircraft and to provide forward propulsion.
The propellers on some aircraft can operate with a negative blade pitch angle, and thus reverse the thrust from the propeller. This is known as Beta Pitch. Reverse thrust is used to help slow the aircraft after landing and is particularly advantageous when landing on a wet runway as wheel braking suffers reduced effectiveness.
A multi-axis thrust vectoring engine nozzle in motion. Thrust vectoring, also known as thrust vector control (TVC), is the ability of an aircraft, rocket or other vehicle to manipulate the direction of the thrust from its engine(s) or motor(s) to control the attitude or angular velocity of the vehicle.
Kitchen Rudder. Image from the 1916 U.S. patent. Enhanced design to the Kitchen Rudder. Image from the 1990 U.S. patent. KLM Fokker 70 with reverse thrust applied. The two surfaces behind the engine can be seen in the deployed position, diverting the engine exhaust gases (hence thrust) forward.