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Motorjet Engines
A motorjet is a rudimentary type of jet engine which is sometimes referred to as ''thermojet'', a term now commonly used to describe a particular and completely unrelated pulsejet design. Design At the heart the motorjet is an ordinary piston engine (hence, the term ''motor''), but instead of (or sometimes, as well as) driving a propeller, it drives a compressor. The compressed air is channeled into a combustion chamber, where fuel is injected and ignited. The high temperatures generated by the combustion cause the gases in the chamber to expand and escape at high velocity from the exhaust, creating a thermal reactive force that provides useful thrust. Motorjet engines provide greater thrust than a propeller alone mounted on a piston engine; this has been successfully demonstrated in a number of different aircraft. A jet engine also can provide thrust at higher speeds where a propeller becomes less efficient or even ineffective; in fact, a jet engine gains efficiency as spee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WRDK
WRDK (90.7 FM) was a radio station licensed to serve Bladenboro, North Carolina, United States. The station was owned by Richburg Educational Broadcasters, Inc. The station surrendered its license on March 12, 2018; the Federal Communications Commission The Federal Communications Commission (FCC) is an independent agency of the United States government that regulates communications by radio, television, wire, internet, wi-fi, satellite, and cable across the United States. The FCC maintains j ... cancelled it on March 22. References External links RDK Radio stations established in 2011 2011 establishments in North Carolina Radio stations disestablished in 2018 2018 disestablishments in North Carolina Defunct radio stations in the United States RDK {{NorthCarolina-radio-station-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastman Jacobs
Eastman Jacobs (1902–1987) was a leading American aerodynamicist who worked for NACA's Langley Memorial Aeronautical Laboratory (renamed NASA Langley Research Center in 1958) from the 1920s to the 1940s. He was responsible for advancing many fields in aerodynamics, dealing particularly with wind tunnels, airfoils, turbulence, boundary layers, and Schlieren photography. Biography Eastman Jacobs joined NACA in 1925 after earning a bachelor's degree in Electrical Engineering at the University of California, Berkeley. He applied at the Bell Labs but was not accepted and opted for his second choice Langley. His knowledge of complex analysis was key to current airfoil design techniques at the time. He quickly became one of the leading scientists at the Langley Research Center due to his work with optimizing airfoils using a variable density wind tunnel that could operate with high Reynolds numbers. He was also officially the head of the Variable Density Wind Tunnel Division fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stipa-Caproni
The Stipa-Caproni, also known as the Caproni Stipa, was an experimental Italy, Italian aircraft designed in 1932 by Luigi Stipa (1900–1992) and built by Caproni. It featured a hollow, barrel-shaped fuselage with the Aircraft engine, engine and propeller (aircraft), propeller completely enclosed by the fuselage—in essence, the whole fuselage was a single ducted fan. Although the ''Regia Aeronautica'' (Italian Royal Air Force) was not interested in pursuing development of the Stipa-Caproni, its design influenced the development of jet propulsion. Stipa's design Stipa's basic idea, which he called the "intubed propeller", was to mount the engine and propeller inside a fuselage that itself formed a tapered duct, or venturi tube, and compressed the propeller's airflow and the engine exhaust before it exited the duct at the trailing edge of the aircraft, essentially applying Bernoulli's principle of fluid movements to make the aircraft's propeller more efficient. This is a simila ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luigi Stipa
Luigi Stipa (30 November 1900 – 9 January 1992) was an Italian aeronautical, hydraulic, and civil engineer and aircraft designer who invented the "intubed propeller" for aircraft, a concept that some aviation historians view as the predecessor of the turbofan engine. Early life and career Stipa was born in Appignano del Tronto, Italy on 30 November 1900. He left school to serve in the Italian Army's Bersaglieri Corps during World War I. After the war, he earned academic degrees in aeronautical engineering, hydraulic engineering and civil engineering. He went to work for the Italian Air Ministry, where he rose to the position of general inspector of the Engineering Division of the ''Regia Aeronautica'' (Italian Royal Air Force). Intubed propeller In the 1920s, Stipa applied his study of hydraulic engineering to develop a theory of how to make aircraft more efficient as they traveled through the air. Noting that in fluid dynamics—in accordance with Bernoulli's principle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gas Turbine
A gas turbine or gas turbine engine is a type of Internal combustion engine#Continuous combustion, continuous flow internal combustion engine. The main parts common to all gas turbine engines form the power-producing part (known as the gas generator or core) and are, in the direction of flow: * a rotating gas compressor * a combustor * a compressor-driving turbine. Additional components have to be added to the gas generator to suit its application. Common to all is an air inlet but with different configurations to suit the requirements of marine use, land use or flight at speeds varying from stationary to supersonic. A propelling nozzle is added to produce thrust for flight. An extra turbine is added to drive a propeller (turboprop) or ducted fan (turbofan) to reduce fuel consumption (by increasing propulsive efficiency) at subsonic flight speeds. An extra turbine is also required to drive a helicopter rotor or land-vehicle transmission (turboshaft), marine propeller or electric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks in World War II, Tanks and Air warfare of World War II, aircraft played major roles, enabling the strategic bombing of cities and delivery of the Atomic bombings of Hiroshima and Nagasaki, first and only nuclear weapons ever used in war. World War II is the List of wars by death toll, deadliest conflict in history, causing World War II casualties, the death of 70 to 85 million people, more than half of whom were civilians. Millions died in genocides, including the Holocaust, and by massacres, starvation, and disease. After the Allied victory, Allied-occupied Germany, Germany, Allied-occupied Austria, Austria, Occupation of Japan, Japan, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sukhoi Su-5
The Sukhoi Su-5 or I-107 was a Soviet mixed-power (propeller and motorjet) prototype fighter aircraft built toward the end of World War II. Development The appearance of the German turbojet-powered Messerschmitt Me 262 near the end of World War II prompted the Soviet Union to develop faster fighter aircraft. Since the USSR lacked a production-ready turbojet engine, development efforts were directed toward mixed-power aircraft utilizing a conventional piston engine-driven propeller for the majority of propulsion with a small rocket or jet engine for bursts of speed. The Su-5 (initially I-107) and the conceptually similar Mikoyan-Gurevich I-250 were designed in 1944. The aircraft first flew on 6 April 1945 and underwent limited flight testing. It was subsequently fitted with a laminar flow wing and attained 793 km/h (428 kn, 493 mph) at 4,350 m (14,270 ft) with the motorjet functioning. On 15 June 1945, the Klimov VK-107A piston engine was damaged beyond r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kholshchevnikov VRDK
The Kholshchevnikov VRDK (Vozdushno-Reaktivniy Dopolnitelniy Kompressor) ''(Russian: "Jet-Propelled Auxiliary Compressor”)'', or E-3020, was a motorjet developed in the Soviet Union during World War II. The VRDK was designed to give fighter aircraft a ten-minute performance boost during combat. VRDK boosters were built in small numbers for use in the Mikoyan-Gurevich I-250 and Sukhoi Su-5 mixed propulsion fighter aircraft. Both aircraft made their first flights in 1945, shortly before the end of World War II. Interest in VRDK technology declined quickly after World War II as Soviet designers focused on the development of turbojet powered fighter aircraft. Design and development Design work on VRDK technology started in 1941 at the Central Aerohydrodynamic Institute with the goal of developing a motorjet where a piston engine would be combined with an axial flow compressor. From 1943 work was handed over to the Central Institute of Aviation Motors where design studies sep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mikoyan-Gurevich I-250
The Mikoyan-Gurevich I-250 (''Samolet N''), aka MiG-13, was a Soviet fighter aircraft developed as part of a crash program in 1944 to develop a high-performance fighter to counter German turbojet-powered aircraft such as the Messerschmitt Me 262. The Mikoyan-Gurevich design bureau decided to focus on a design that used something more mature than the jet engine, which was still at an experimental stage in the Soviet Union, and chose a mixed-power solution with the VRDK (''Vozdushno-Reaktivny Dvigatel Kompressornyi'' – air reaction compressor jet) motorjet powered by the Klimov VK-107 V12 engine. While quite successful when it worked, with a maximum speed of being reached during trials, production problems with the VRDK fatally delayed the program and it was canceled in 1948 as obsolete. Design and development By January 1944 the Soviets were aware of successful British and American jet aircraft projects and that the Germans were about to deploy jet and rocket-propelled aircraf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soviet Union
The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet Union, it dissolved in 1991. During its existence, it was the list of countries and dependencies by area, largest country by area, extending across Time in Russia, eleven time zones and sharing Geography of the Soviet Union#Borders and neighbors, borders with twelve countries, and the List of countries and dependencies by population, third-most populous country. An overall successor to the Russian Empire, it was nominally organized as a federal union of Republics of the Soviet Union, national republics, the largest and most populous of which was the Russian SFSR. In practice, Government of the Soviet Union, its government and Economy of the Soviet Union, economy were Soviet-type economic planning, highly centralized. As a one-party state go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solid-propellant Rocket
A solid-propellant rocket or solid rocket is a rocket with a rocket engine that uses solid propellants (fuel/ oxidizer). The earliest rockets were solid-fuel rockets powered by gunpowder. The inception of gunpowder rockets in warfare can be credited to the ancient Chinese, and in the 13th century, the Mongols played a pivotal role in facilitating their westward adoption. All rockets used some form of solid or powdered propellant until the 20th century, when liquid-propellant rockets offered more efficient and controllable alternatives. Because of their simplicity and reliability, solid rockets are still used today in military armaments worldwide, model rockets, solid rocket boosters and on larger applications. Since solid-fuel rockets can remain in storage for an extended period without much propellant degradation, and since they almost always launch reliably, they have been frequently used in military applications such as missiles. The lower performance of solid propellant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yokosuka MXY-7 Ohka
The Yokosuka MXY-7 is a purpose-built, rocket-powered human-guided ''kamikaze'' attack-aircraft deployed by Japan against Allied ships in the Pacific Ocean theater toward the end of World War II. Although extremely fast, the ''Ohka'' had a very short range of , so it had to be carried into action as a parasite aircraft by a much larger bomber that was vulnerable to carrier-borne fighters. In action during the Battle of Okinawa in 1945, ''Ohka''s succeeded in sinking or damaging some escort-vessels and transport ships, but never sank any major warships. The Japanese developed improved versions in an attempt to overcome the aircraft's shortcomings, but they came too late for deployment. Allied personnel referred to the aircraft as "Baka Bombs" ( ''baka'' being a Japanese pejorative term meaning "fool" or "idiot"). Design and development The MXY-7 Navy Suicide Attacker ''Ohka'' was a manned flying bomb that was usually carried underneath a Mitsubishi G4M2e Model 24J "Betty" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
