Reference Terms
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Helicopter
A helicopter is an aircraft which is lifted and propelled by one or more horizontal rotors (propellers). Helicopters are classified as rotary-wing aircraft to distinguish them from conventional fixed-wing aircraft. Compared to conventional fixed-wing aircraft, helicopters are much more complex, more expensive to buy and operate, relatively slow, have shorter range and restricted payload. The compensating advantage is maneuverability: helicopters can hover in place, reverse, and above all take off and land vertically. Subject only to refueling facilities and load/altitude limitations, a helicopter can travel to any location, and land anywhere with enough space (approximately twice the area of the rotor disk).
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Matter & Energy News
June 9, 2025
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June 3, 2025 — New research demonstrates that with collaboration between stakeholders, Australia can fully decarbonize its domestic and energy export economies by 2060 -- a feat requiring $6.2 trillion USD and ...
June 2, 2025 — Researchers have synthesized a new compound called infuzide that shows activity against resistant strains of ...
June 3, 2025 — A new study found exposure to specific tiny particles in air pollution during pregnancy are associated with increased risk of various negative birth ...
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June 2, 2025 — Scientists have reported use of antibacterial coatings made from resilin-mimetic proteins to fully block bacteria from attaching to a surface. A protein that gives fleas their bounce has been used to boot out bacteria cells, with lab results ...
June 2, 2025 — Electronics often get thrown away after use because recycling them requires extensive work for little payoff. Researchers have now found a way to change the ...
June 2, 2025 — Physicists have developed a lens with 'magic' properties. Ultra-thin, it can transform infrared light into visible light by halving the wavelength of incident ...
June 2, 2025 — Despite advances in machine vision, processing visual data requires substantial computing resources and energy, limiting deployment in edge devices. Now, researchers from Japan have developed a self-powered artificial synapse that distinguishes ...
June 2, 2025 — Researchers have recreated the world's oldest synthetic pigment, called Egyptian blue, which was used in ancient Egypt about 5,000 years ...
June 2, 2025 — Researchers have discovered that the mixing of small particles between two solid electrolytes can generate an effect called a 'space charge layer,' an accumulation of electric charge at the interface between the two materials. The finding could aid ...
Latest Headlines
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June 8, 2025 — Physicists have managed to simulate a strange quantum phenomenon where light appears to arise from empty space a concept that until now has only ...
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May 29, 2025 — SAVANA uses a machine learning algorithm to identify cancer-specific structural variations and copy number aberrations in long-read DNA sequencing data. The complex structure of cancer genomes means ...
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