RP 1 (other)
RP 1, RP-1, RP.1, RP1, or ''Richie and Jess'' may refer to: * RP-1, ''Rocket Propellant 1'' * RP1, ''retinitis pigmentosa 1 protein'' * RP1 asteroid ** 5580 Sharidake or ''1988 RP1'', asteroid Sharidake, RP1 from 1998, the 5580th asteroid catalogued ** (12728) 1991 RP1, RP1 from 1991, the 12728th asteroid catalogued ** 12576 Oresme or ''1999 RP1'', asteroid Oresme, RP1 from 1999, the 12576th asteroid catalogued * Mitsubishi RP-1, helicopter * Rensselaer RP-1, crewed glider * Radioplane RP-1, UAV * ''Ready Player One'', novel by Ernest Cline * RP1, real projective line See also * RPI (other) * RPL (other) RPL may refer to: Public Safety * Registured Public Safety Leader (RPL) Association of Public-Safety Communications Officials-International Medicine and biology * Recurrent Pregnancy Loss: recurrent miscarriages Computing * Raptor Lake ...

RP-1
RP-1 (alternatively, Rocket Propellant-1 or Refined Petroleum-1) is a highly refined form of kerosene outwardly similar to jet fuel, used as rocket fuel. RP-1 provides a lower specific impulse than liquid hydrogen (LH2), but is cheaper, is stable at room temperature, and presents a lower explosion hazard. RP-1 is far denser than LH2, giving it a higher energy density (though its specific energy is lower). RP-1 also has a fraction of the toxicity and carcinogenic hazards of hydrazine, another room-temperature liquid fuel. Usage and history RP-1 is a fuel in the first-stage boosters of the Electron, Soyuz, Zenit, Delta I-III, Atlas, Falcon, Antares, and Tronador II rockets. It also powered the first stages of the Energia, Titan I, Saturn I and IB, and Saturn V. The Indian Space Research Organization (ISRO) is also developing an RP-1 fueled engine for its future rockets. Development During and immediately after World War II, alcohols (primarily ethanol, occasionally metha ...
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5580 Sharidake
__NOTOC__ Year 558 ( DLVIII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. The denomination 558 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Byzantine Empire * May 7 – In Constantinople, the dome of the Hagia Sophia collapses due to an earthquake. Emperor Justinian I orders the dome to be rebuilt. Europe * The Avars and the Slavs occupy the Hungarian Plain on the Balkans. The threat of Avar domination prompts the Lombards to migrate to Italy. * December 13 – King Chlothar I reunites the Frankish Kingdom after his brother Childebert I dies, becoming sole ruler of the Franks. * December 23 – Chlothar I is crowned King of the Franks. * Conall mac Comgaill becomes king of Dál Riata, a Gaelic overkingdom on the western coast of Scotland. Asia * Istämi, ruler of the Western Turkic K ...
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(12728) 1991 RP1
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by  2, although by other definitions 1 is the second natural number, following  0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 is the s ...
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12576 Oresme
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by  2, although by other definitions 1 is the second natural number, following  0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 is the s ...
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Mitsubishi RP-1
__NOTOC__ The Mitsubishi RP-1 is an Experimental Japanese twin-engined helicopter developed as part of a secret company research programme. The RP-1 was first revealed in April 1994 just before it started hover trials leading to a first flight on 14 September 1994. Specifications References Notes Bibliography * RP-1 RP-1 (alternatively, Rocket Propellant-1 or Refined Petroleum-1) is a highly refined form of kerosene outwardly similar to jet fuel, used as rocket fuel. RP-1 provides a lower specific impulse than liquid hydrogen (LH2), but is cheaper, is st ... 1990s Japanese experimental aircraft 1990s Japanese helicopters Twin-turbine helicopters Aircraft first flown in 1994 {{Aero-1990s-stub ...
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Rensselaer RP-1
The Rensselaer RP-1 (for Rensselaer Polytechnic design 1) is an American low-wing, single-seat, foot-launchable glider that was designed and produced by the Rensselaer Polytechnic Institute of Troy, New York. It first flew in 1980. Design and development The RP-1 was partly funded by NASA and was the first aircraft in Rensselaer's Composite Aircraft Program. The aircraft is of mixed construction, made from composites, Kevlar and PVC foam. Its span wing employs a Wortmann FX-63-137 airfoil. The aircraft weighs just and was intended to be foot-launched. The landing gear consists of a main skid and dual tail skids. The aircraft achieved a 20:1 glide ratio In aerodynamics, the lift-to-drag ratio (or L/D ratio) is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air. It describes the aerodynamic efficiency under giv .... Only one was completed. Specifications (RP-1) See also Referenc ...
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Radioplane RP-1
The OQ-2 Radioplane was the first mass-produced UAV or drone in the United States, manufactured by the Radioplane Company. A follow-on version, the OQ-3, became the most widely used target drone in US service, with over 9,400 being built during World War II. History The OQ-2 was originally a small radio controlled aircraft model designed by Walter Righter. The design, along with its engine design, was purchased by actor Reginald Denny, who had demonstrated another model to the US Army in 1940. Calling the new design the RP-2, he demonstrated several updated versions to the Army as the RP-2, RP-3 and RP-4 in 1939. In 1940, the Army placed an order for 53 RP-4s (some sources refer to the RP-4 as OQ-1. but that designation was never assigned). This small order led to a much bigger 1941 order for the similar RP-5, which became the US Army OQ-2, the ''OQ'' meaning a "subscale target". The US Navy also bought the drone, designating it TDD-1, for ''Target Drone, Denny, 1''. Thousand ...
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Ready Player One
''Ready Player One'' is a 2011 science fiction novel, and the debut novel of American author Ernest Cline. The story, set in a dystopia in 2045, follows protagonist Wade Watts on his search for an Easter egg in a worldwide virtual reality game, the discovery of which would lead him to inherit the game creator's fortune. Cline sold the rights to publish the novel in June 2010, in a bidding war to the Crown Publishing Group (a division of Random House). The book was published on August 16, 2011. An audiobook was released the same day; it was narrated by Wil Wheaton, who was mentioned briefly in one of the chapters. In 2012, the book received an Alex Award from the Young Adult Library Services Association division of the American Library Association and won the 2011 Prometheus Award. A film adaptation, screenwritten by Cline and Zak Penn and directed by Steven Spielberg, was released on March 29, 2018. A sequel novel, '' Ready Player Two'', was released on November 24, 2020, t ...
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Real Projective Line
In geometry, a real projective line is a projective line over the real numbers. It is an extension of the usual concept of a line (geometry), line that has been historically introduced to solve a problem set by visual perspective (visual), perspective: two parallel lines do not intersect but seem to intersect "at infinity". For solving this problem, points at infinity have been introduced, in such a way that in a real projective plane, two distinct projective lines meet in exactly one point. The set of these points at infinity, the "horizon" of the visual perspective in the plane, is a real projective line. It is the set of directions emanating from an observer situated at any point, with opposite directions identified. An example of a real projective line is the projectively extended real line, which is often called ''the'' projective line. Formally, a real projective line P(R) is defined as the set of all one-dimensional linear subspaces of a two-dimensional vector space ove ...
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RPI (other)
RPI may refer to: Universities * Rensselaer Polytechnic Institute, Troy, New York, US * Richmond Professional Institute, merged into Virginia Commonwealth University Science and technology * Raspberry Pi (RPi), a UK single-board computer * Reticulocyte production index, a blood test result * Ribose-5-phosphate isomerase (Rpi), an enzyme Organizations * Recognition Professionals International * Republican Party of India * Republican Party of Iowa Other * Rating Percentage Index, in college sports * Retail price index, UK inflation measure * Revenue Protection Inspector, on UK public transport * Rock progressivo italiano, Italian progressive rock See also * RP 1 (other) * RPL (other) RPL may refer to: Public Safety * Registured Public Safety Leader (RPL) Association of Public-Safety Communications Officials-International Medicine and biology * Recurrent Pregnancy Loss: recurrent miscarriages Computing * Raptor Lake ...