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Douglas O-2
The Douglas O-2 was a 1920s American observation aircraft built by the Douglas Aircraft Company. Development The important family of Douglas observation aircraft sprang from two XO-2 prototypes, the first of which was powered by the 420 hp (313 kW) Liberty V-1650-1 V-engine and test-flown in the autumn of 1924. The second XO-2 was powered by the 510 hp (380 kW) Packard 1A-1500 Vee engine, which proved unreliable. The US Army ordered 45 O-2 production aircraft in 1925, these retaining the XO-2's welded steel tube fuselage, wooden wings and overall fabric covering but at the same time introducing aluminum panels on the forward fuselage. The XO-2 had been flown with short and long-span wings, the latter giving improved handling and therefore being specified for the production aircraft. The fixed tailskid landing gear included a main unit of the divided type, the horizontal tail surface was strut braced, and the engine was cooled by a tunnel radiator. The O-2 prov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington State Route 290
State Route 290 (SR 290), named Hamilton Street and Trent Avenue, is an long state highway serving Spokane County in the U.S. state of Washington. SR 290 travels parallel to a Union Pacific railroad from (I-90) in Spokane through Millwood and across the Spokane River thrice towards Spokane Valley, where the highway intersects . From Spokane Valley, the roadway continues to the Idaho state border, where it becomes . The current route of SR 290 was formerly county roads between 1901 and 1937 when it became Secondary State Highway 2H (SSH 2H). The highway ran from (US 2) and in Downtown Spokane to Idaho until a 1964 renumbering of state highways, which re-designated SSH 2H as SR 290. A short spur route connecting the main highway to I-90 was also added during the renumbering, but SR 290 was realigned to replace the route in 2005. Route description SR 290 begins as a short freeway at a directional T-interchange with (I-90) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toyota H Engine
The Toyota H engine is a successor to the older D series engines. The engine was first produced in 1967 but did not reach road cars till 1972, it was then replaced by the 2H engine and the 12H-T turbo engine. It was succeeded by the more advanced SOHC HZ series engine. H The H is a 3.6 L (3,576 cc) inline 6, 12-valve OHV diesel engine. Bore is 88 mm and stroke is 98 mm, with a compression ratio of 21:1. Output is at 3,600 rpm with of torque at 2,200 rpm. Applications * Toyota Land Cruiser HJ45 * Toyota Dyna HU15 HU30 * Toyota Weapon carrier HQ15 2H The 2H is a 4.0 L (3,980 cc) inline 6, 12 valve OHV indirect injection diesel engine. Bore is 91 mm and stroke is 102 mm, with a compression ratio of 20.7:1. Output is at 3,500 rpm - later production years 107 hp (80 kW) with 177 lb·ft (240 N·m) of torque at 2,000 rpm. This engine weighs in European trim from 1985. Applications * Toyota Land Cruiser HJ4 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaparral Cars
Chaparral Cars was a pioneering American automobile racing team and race car developer that engineered, built, and raced cars from 1963 through 1970. Founded in 1962 by American Formula One racers Hap Sharp and Jim Hall, it was named after the roadrunner, a fast-running ground cuckoo also known as a ''chaparral bird''. Background Dick Troutman and Tom Barnes were builders of the original Chaparral race cars (later referred to as Chaparral 1). Jim Hall purchased two Chaparral 1s to race. When Hall and Sharp began building their own cars, they asked Troutman and Barnes if they could continue to use the Chaparral name. That is why the Hall/Sharp cars are all named Chaparral 2s (models 2A through 2J for sports cars/CanAm cars, and the 2K which was the 1979–1982 Indycar). Despite winning the Indianapolis 500 in 1980, they left motor racing in 1982. Chaparral cars also featured in the SCCA/ CASC Can-Am series and Endurance racing. Jim Hall was a leader in the innovation and des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pencil
A pencil () is a writing or drawing implement with a solid pigment core in a protective casing that reduces the risk of core breakage, and keeps it from marking the user's hand. Pencils create marks by physical abrasion, leaving a trail of solid core material that adheres to a sheet of paper or other surface. They are distinct from pens, which dispense liquid or gel ink onto the marked surface. Most pencil cores are made of graphite powder mixed with a clay binder. Graphite pencils (traditionally known as "lead pencils") produce grey or black marks that are easily erased, but otherwise resistant to moisture, most chemicals, ultraviolet radiation and natural aging. Other types of pencil cores, such as those of charcoal, are mainly used for drawing and sketching. Coloured pencils are sometimes used by teachers or editors to correct submitted texts, but are typically regarded as art supplies, especially those with cores made from wax-based binders that tend to smear when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deuterium
Deuterium (or hydrogen-2, symbol or deuterium, also known as heavy hydrogen) is one of two Stable isotope ratio, stable isotopes of hydrogen (the other being Hydrogen atom, protium, or hydrogen-1). The atomic nucleus, nucleus of a deuterium atom, called a deuteron, contains one proton and one neutron, whereas the far more common protium has no neutrons in the nucleus. Deuterium has a natural abundance in Earth's oceans of about one atom of deuterium among all atoms of hydrogen (see heavy water). Thus deuterium accounts for approximately 0.0156% by number (0.0312% by mass) of all the naturally occurring hydrogen in the oceans, while protium accounts for more than 99.98%. The abundance of deuterium changes slightly from one kind of natural water to another (see Vienna Standard Mean Ocean Water). (Tritium is yet another hydrogen isotope, with two neutrons, that is far more rare and is radioactive.) The name ''deuterium'' is derived from the Greek , meaning "second", to denot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volkswagen EA827 Engine
The EA827 family of petrol engines was initially developed by Audi under Ludwig Kraus leadership and introduced in 1972 by the B1-series Audi 80, and went on to power many Volkswagen Group models. This is a very robust water-cooled engine configuration for four- up to eight- cylinders. In Brazil this engine was produced under the name AP (''Alta Performance'', "high performance"). There was also a range of EA827 diesel engines, sharing its cylinder spacing with the spark ignition petrol engines. 60 hp 1.3 ; configuration : 1,297 cc (78 cu in) inline-four, bore × stroke ; head : SOHC two valves per cylinder ; block : grey cast iron, five bearings ; output : at 5,500 rpm, at 3,200 rpm ;fuel : carburettor ; application : Audi 80, Volkswagen Passat 84 hp 1.4 ; configuration : 1,423 cc inline-four, bore × stroke ; head : SOHC 2-valve per cylinder, 10:1 compression ; block : cast iron, five bearings ; output : at 5,500 rpm, at 4,200 rpm ; fuel : electronic injection PI ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyran
In chemistry, pyran, or oxine, is a six-membered heterocyclic, non-aromatic ring, consisting of five carbon atoms and one oxygen atom and containing two double bonds. The molecular formula is C5H6O. There are two isomers of pyran that differ by the location of the double bonds. In 2''H''-pyran, the saturated carbon is at position 2, whereas, in 4''H''-pyran, the saturated carbon is at position 4. 4''H''-Pyran was first isolated and characterized in 1962 via pyrolysis of 2-acetoxy-3,4-dihydro-2''H''-pyran. It was found too unstable, particularly in the presence of air. 4''H''-pyran easily disproportionates to the corresponding dihydropyran and the pyrylium ion, which is easily hydrolyzed in aqueous medium. Although the pyrans themselves have little significance in chemistry, many of their derivatives are important biological molecules, such as the pyranoflavonoids. The term pyran is also often applied to the saturated ring analog, which is more properly referred to as tetrahydrop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benzopyran
Benzopyran is a polycyclic organic compound that results from the fusion of a benzene ring to a heterocyclic pyran ring. According to current IUPAC nomenclature, the name chromene used in previous recommendations is retained; however, systematic ‘benzo’ names, for example 2''H''-1-benzopyran, are preferred IUPAC names for chromene, isochromene, chromane, isochromane, and their chalcogen analogues. There are two isomers of benzopyran that vary by the orientation of the fusion of the two rings compared to the oxygen, resulting in 1-benzopyran (chromene) and 2-benzopyran (isochromene)—the number denotes where the oxygen atom is located by standard naphthalene-like nomenclature. Some benzopyrans have shown anticancerous activity ''in vitro''. The radical form of benzopyran is paramagnetic. The unpaired electron is delocalized over the whole benzopyran molecule, rendering it less reactive than one would expect otherwise. A similar example is the cyclopentadienyl radical. Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fiscal Year
A fiscal year (or financial year, or sometimes budget year) is used in government accounting, which varies between countries, and for budget purposes. It is also used for financial reporting by businesses and other organizations. Laws in many jurisdictions require company financial reports to be prepared and published on an annual basis but generally not the reporting period to align with the calendar year (1 January to 31 December). Taxation laws generally require accounting records to be maintained and taxes calculated on an annual basis, which usually corresponds to the fiscal year used for government purposes. The calculation of tax on an annual basis is especially relevant for direct taxes, such as income tax. Many annual government fees—such as council tax and license fees, are also levied on a fiscal year basis, but others are charged on an anniversary basis. Some companies, such as Cisco Systems, end their fiscal year on the same day of the week each year: the day ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aptera 2 Series
The Aptera 2 Series (formerly the Aptera Typ-1) was a high-efficiency three-wheeled passenger car designed by Aptera Motors that failed to reach production. The first model of the 2 Series slated for production was the Aptera 2e (formerly Typ-1e), a battery electric vehicle announced in late 2008. The 2e would accelerate from 0- in 6.3 seconds and have a top speed of . A later model would have been Aptera 2h (formerly Typ-1h), a plug-in hybrid electric vehicle. According to Aptera, the 2 Series expected price range was £16,000 to £32,000. An Aptera 2 made a short appearance in the 2009 film ''Star Trek''. The company opened pre-ordering for residents of California, but stopped taking deposits in July 2011. On 12 August 2011, Aptera announced it would return all deposits from customers who had signed up to buy a car. In 2019, Aptera Motors was re-formed by the original founders, Chris Anthony and Steve Fambro, and began developing a much revised solar-powered EV, the Aptera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrogen
Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. At standard conditions hydrogen is a gas of diatomic molecules having the formula . It is colorless, odorless, tasteless, non-toxic, and highly combustible. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all normal matter.However, most of the universe's mass is not in the form of baryons or chemical elements. See dark matter and dark energy. Stars such as the Sun are mainly composed of hydrogen in the plasma state. Most of the hydrogen on Earth exists in molecular forms such as water and organic compounds. For the most common isotope of hydrogen (symbol 1H) each atom has one proton, one electron, and no neutrons. In the early universe, the formation of protons, the nuclei of hydrogen, occurred during the first second after the Big Bang. The emergence of neutral hydrogen atoms throughout the universe occurred about 370,000 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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