Phenomenon allowing supersonic aircraft to ride their own shockwave
The XB-70 had folding wingtips to enhance both compression lift and directional stability at high speeds.
In aerodynamics, compression lift refers to the increased pressure under an aircraft that uses shock waves generated by its own supersonic flight to generate lift. This can lead to dramatic improvements in lift for supersonic/hypersonic aircraft. Clarence Syvertson and Alfred J. Eggers discovered this phenomenon in 1956 as they analyzed abnormalities at the reentry of nuclear warheads.[1]
The basic concept of compression lift is well known; "planing" boats reduce drag by "surfing" on their own bow wave in exactly the same fashion. Using this effect in aircraft is more difficult, however, because the "wake" is not generated until supersonic speeds are reached, and is highly angled. Aircraft have to be carefully shaped to take full advantage of this effect. In addition, the angle of the shock waves varies greatly with speed, making it even more difficult to design a craft that gains significant lift over a wide range of speeds.
Higher speed designs using compression lift, waveriders, remain an interesting possibility for hypersonic vehicle designs, although only testbed models have been flown.[1] The Boeing X-51 (Waverider) also uses compression lift.
compressionlift refers to the increased pressure under an aircraft that uses shock waves generated by its own supersonic flight to generate lift. This...
supersonic lift-to-drag ratio by using the shock waves being generated by its own flight as a lifting surface, a phenomenon known as compressionlift. The waverider...
handling was the North American XB-70 Valkyrie. This increased both compressionlift and enhanced directional stability at high speeds. Grumman A-6A Intruder...
the compression stroke and releases air from the cylinder to the exhaust manifold. The CCV would have maximum lift at full load and minimum lift at no...
The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum...
In astrophysics, gravitational compression is a phenomenon in which gravity, acting on the mass of an object, compresses it, reducing its size and increasing...
the wings at high Mach numbers, they were able to take advantage of compressionlift on the underside of the aircraft. This improved the L/D ratio by about...
industrial truck, lift truck, jitney, hi-lo, fork truck, fork hoist, and forklift truck) is a powered industrial truck used to lift and move materials...
stroke. Compression ratio is 11.3:1. Same as the LCV but features Intake Valve Lift Control (IVLC) system provides two-stage variable valve lift in addition...
The outer sections of the XB-70 Valkyrie wing folded down to enhance compressionlift and directional stability during supersonic cruise. (Many aircraft...
of the air in the cylinder due to mechanical compression; thus, the diesel engine is called a compression-ignition engine (CI engine). This contrasts with...
compound delta layout. The B-70 had a shoulder-mounted wing to best use compressionlift generated by the nose and engine intakes, but this was not suitable...
Thoracic outlet syndrome (TOS) is a condition in which there is compression of the nerves, arteries, or veins in the superior thoracic aperture, the passageway...
timing with lift control. It produces 190 PS (187 hp; 140 kW) at 7000 rpm and 20.0 kg⋅m (196 N⋅m; 145 lb⋅ft) at 6000 rpm with a 10.3:1 compression ratio and...
heat released as the air mass is orographically lifted. As the air mass descends, it is compression heated. The warm foehn wind, locally known as the...
machining to obtain high compression ratios. However, the open chamber heads valves are less shrouded, which improves low lift airflow, and they exhibit...
Homogeneous Charge Compression Ignition (HCCI) is a form of internal combustion in which well-mixed fuel and oxidizer (typically air) are compressed to...
example, the compression of a gas within a cylinder of an engine is assumed to occur so rapidly that on the time scale of the compression process, little...
matrix where they are preserved, or once lifted out of the matrix by a peel or transfer technique. Compression fossils are formed most commonly in environments...
space elevator, also referred to as a space bridge, star ladder, and orbital lift, is a proposed type of planet-to-space transportation system, often depicted...
the valve lifters. The first compression ring and the oil ring are made of steel, the second compression ring is made of cast iron. Compression rings 1...
entire structure and lift are in compression through the rails into the floor of the home. Cable-driven home lifts consist of a shaft, a cabin, a control...
resist compression while under heavy loads. The shoes are designed for maximum stability while remaining flexible in the toe box. This allows the lifter to...
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