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W-type Star
Type W or W-type may refer to: * the Handley Page Type W, a biplane * W engine A W engine is a type of piston engine where three or four cylinder banks share the same crankshaft, resembling the letter "W" when viewed from the front. W engines with three banks of cylinders are also called "broad arrow" engines, due to thei ... types * Renault Type W engine types * W-types, in type theory * a W-type star * a W-type planet in binary star systems * a Victorian Railways W type carriage * W-type ferrite, a type of ceramic material See also * W-class destroyer {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Handley Page Type W
The Handley Page W.8, W.9 and W.10 were British two- and three-engine medium-range biplane airliners designed and built by Handley Page. The W.8 (also known as the H.P.18) was the company's first purpose-built civil airliner although it was a development of the wartime Handley Page Type O/400 bomber via the O/7, O/10 and O/11 transports. It had an enclosed cabin for (in most versions) 12 passengers, along with two crew in an open cockpit, and has the distinction of being the world's first airliner to be designed with an on-board lavatory. The prototype first flew on 4 December 1919, shortly after it was displayed at the 1919 Paris Air Show at Le Bourget. The W.8 was subsequently revised to give the W.8b, W.8e (H.P.26), W.9 (H.P.27) and W.10 (H.P.30). It was also the basis for the W.8d (H.P.24), the Handley Page Hyderabad bomber. Developments W.8 Prototype, holding 15 passengers, powered by two 450 hp (336 kW) Napier Lion engines. The original company designation wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
W Engine
A W engine is a type of piston engine where three or four cylinder banks share the same crankshaft, resembling the letter "W" when viewed from the front. W engines with three banks of cylinders are also called "broad arrow" engines, due to their shape resembling the British government broad arrow property mark. The most common W-type engine is the 4-bank type, with the Volkswagen Group experimenting with the Passat W8 and its 4.0 liter, 4-bank W8 engine and later implementing the concept with the group's Bentley division, creating a 6.0 liter W12 in both naturally aspirated and turbocharged variants. Due to the pre-existing VR-type engine only needing one cylinder head despite having two banks of cylinders, a Volkswagen 4-bank W-type engine is structured more similarly to a conventional 2-bank V engine as opposed to a "true" W engine. W engines are significantly less common than V engines. Compared with a V engine, a W engine is typically shorter but wider. In Volkswagen� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Renault Type W
The Renault 70 hp, (8Ab , 8C) is a French V-8 aero engine that first ran in 1910. The type powered many early military aircraft including the Farman MF.7 Longhorn and the Royal Aircraft Factory B.E.2. In addition to French production, these engines were also built in the United Kingdom and equipped the majority of British aircraft sent to France at the start of WW1. Design and development As with other Renault air cooled V-8s, the engine has an early form of reduction gearing where the propeller is fixed to the end of the camshaft and turns at half engine speed. This method of gearing allowed the engine and propeller to be run close to their optimum speeds without the additional weight penalty of a gearbox. Engines intended for pusher aircraft were fitted with a centrifugal blower which fed cooling air over the large finned cast iron cylinders. Compared to contemporary air cooled rotary engines built by Gnome, the 70 hp Renault had a worse power to weight ratio but be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inductive Type
In type theory, a system has inductive types if it has facilities for creating a new type from constants and functions that create terms of that type. The feature serves a role similar to data structures in a programming language and allows a type theory to add concepts like numbers, relations, and trees. As the name suggests, inductive types can be self-referential, but usually only in a way that permits structural recursion. The standard example is encoding the natural numbers using Peano's encoding. It can be defined in Rocq (previously known as ''Coq'') as follows: Inductive nat : Type := , 0 : nat , S : nat -> nat. Here, a natural number is created either from the constant "0" or by applying the function "S" to another natural number. "S" is the successor function which represents adding 1 to a number. Thus, "0" is zero, "S 0" is one, "S (S 0)" is two, "S (S (S 0))" is three, and so on. Since their introduction, inductive types have been extended to enco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
W-type Star
Type W or W-type may refer to: * the Handley Page Type W, a biplane * W engine A W engine is a type of piston engine where three or four cylinder banks share the same crankshaft, resembling the letter "W" when viewed from the front. W engines with three banks of cylinders are also called "broad arrow" engines, due to thei ... types * Renault Type W engine types * W-types, in type theory * a W-type star * a W-type planet in binary star systems * a Victorian Railways W type carriage * W-type ferrite, a type of ceramic material See also * W-class destroyer {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitability Of Binary Star Systems
Planets in binary star systems may be candidates for supporting extraterrestrial life. Habitability of binary star systems is determined by many factors from a variety of sources. Typical estimates often suggest that 50% or more of all star systems are binary systems. This may be partly due to sample bias, as massive and bright stars tend to be in binaries and these are most easily observed and catalogued; a more precise analysis has suggested that the more common fainter stars are usually singular, and that up to two thirds of all stellar systems are therefore solitary. The separation between stars in a binary may range from less than one astronomical unit (au, the "average" Earth-to-Sun distance) to several hundred au. In latter instances, the gravitational effects will be negligible on a planet orbiting an otherwise suitable star, and habitability potential will not be disrupted unless the orbit is highly eccentric. In reality, some orbital ranges are impossible for dynamical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexagonal Ferrite
Hexagonal ferrites or hexaferrites are a family of Ferrite (magnet), ferrites with hexagonal crystal structure. The most common member is BaFe12O19, also called barium ferrite, BaM, etc. BaM is a strong room-temperature ferrimagnetic material with high anisotropy along the ''c'' axis. All the hexaferrite members are constructed by stacking a few building blocks in a certain order. Basic building blocks S block The S block is very common in hexaferrites, which has a chemical formula of MeS6O82+. MeS are smaller metal cations, for example, Fe and other transition metals or noble metals. The S block is essentially a slab cut along the (111) plane of an AB2O4 spinel. Each S block has one A layer and one B layer. The A layer features MeS-centered tetrahedron and MeS-centered octahedron, while the B layer is made up of edge-sharing MeS-centered octahedron. Both A and B layers have the same chemical formula of MeS3O42+. R block The R block has a chemical formula of Me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
