Helical may refer to:
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Helix
A helix () is a shape like a corkscrew or spiral staircase. It is a type of smooth space curve with tangent lines at a constant angle to a fixed axis. Helices are important in biology, as the DNA molecule is formed as two intertwined hel ...
, the mathematical concept for the shape
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Helical engine
The Helical engine is a proposed spacecraft propulsion drive that, like other reactionless drives, would violate the laws of physics.
The concept was proposed by David M. Burns, formerly a NASA engineer at the Marshall Space Flight Center in Alab ...
, a proposed spacecraft propulsion drive
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Helical spring
A selection of conical coil springs
The most common type of spring is the coil spring, which is made out of a long piece of metal that is wound around itself.
Coil springs were in use in Roman times, evidence of this can be found in bronze Fi ...
, a coilspring
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Helical plc
Helical plc (formerly Helical Bar plc) is a property investment and development company. Helical is based in London
London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a ...
, a British property company, once a maker of steel bar stock
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Helicoil
A threaded insert, also known as a threaded bushing, is a fastener element that is inserted into an object to add a threaded hole. They may be used to repair a stripped threaded hole, provide a durable threaded hole in a soft material, place a thr ...
, a mechanical thread repairing insert
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H-el-ical//, stage name for Hikaru, Japanese singer
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