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Topic Review
Gun Carrier Mark I
The Gun Carrier Mark I was the first piece of self-propelled artillery ever to be produced, a British development from the First World War. Gun carriers were first used in the Battle of Pilckem Ridge (31 July – 2 August 1917) during the Third Battle of Ypres (31 July – 10 November 1917).
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Topic Review
Boom Technology Overture
The Boom Technology Overture is a Mach 2.2 (1,300 kn; 2,300 km/h), 55-passenger supersonic transport with 4,500 nmi (8,300 km) of range, which is proposed to be introduced in 2025–2027 by Boom Technology. With 500 viable routes, there could be a market for 1,000 supersonic airliners with business class fares. It had gathered 76 commitments by December 2017. It would keep the delta wing configuration of Concorde but would be built with composite materials. It would be powered by three dry 15,000–20,000 lbf (67–89 kN) turbofans, a derivative or a clean-sheet design were to be selected in 2019.
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Topic Review
Electromagnetic Aircraft Launch System
The Electromagnetic Aircraft Launch System (EMALS) is a type of aircraft launching system developed by General Atomics for the United States Navy. The system launches carrier-based aircraft by means of a catapult employing a linear induction motor rather than the conventional steam piston. EMALS was first installed on the United States Navy's Gerald R. Ford-class aircraft carrier, USS Gerald R. Ford. Its main advantage is that it accelerates aircraft more smoothly, putting less stress on their airframes. Compared to steam catapults, the EMALS also weighs less, is expected to cost less and require less maintenance, and can launch both heavier and lighter aircraft than a steam piston-driven system. It also reduces the carrier's requirement of fresh water, thus reducing the demand for energy-intensive desalination. China is reportedly developing a similar system which is expected to be used on China's Type 003 aircraft carriers.
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Topic Review
Mitsubishi Regional Jet
The Mitsubishi Regional Jet (Japanese: 三菱リージョナルジェット), or MRJ for short, is a twin-engine regional jet aircraft seating 70–90 passengers manufactured by Mitsubishi Aircraft Corporation, a partnership between majority owner Mitsubishi Heavy Industries and minority owner Toyota Motor Corporation with design assistance from Subaru Corporation, itself already an aerospace manufacturer. The MRJ will be the first airliner designed and produced in Japan since the NAMC YS-11 of the 1960s, which was produced at a loss. The first flight of the MRJ was in November 2015. After several delays, deliveries are now scheduled to start by mid-2020.
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Topic Review
Luxury Yacht
A Luxury yacht (also super-yacht, large yacht and mega-yacht) is a very expensive, privately owned, professionally crewed sailing or motor yacht. There is no industry-wide standard for the difference between super-yacht and mega-yacht. The only legal distinction is between yachts above 24 metres (79 ft) and below, as in some countries those above 24 meters must have a permanent crew onboard. This term began to appear at the beginning of the 20th century, when wealthy individuals constructed large private yachts for personal pleasure, such as Charles Henry Fletcher's Jemima F. III, at 111 feet, the largest motor-powered yacht in the world in 1908. More examples of early luxury motor yachts include the Cox & King yachts, Charles L. Seabury and Company's yachts, M/Y (motor yacht) Christina O, and M/Y Savarona.
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Topic Review
Oscilloscope History
The history of the oscilloscope reaches back to the first recordings of waveforms with a galvanometer coupled to a mechanical drawing system in the second decade of the 19th century. The modern day digital oscilloscope is a consequence of multiple generations of development of the oscillograph, cathode-ray tubes, analog oscilloscopes, and digital electronics.
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Biography
Robert L. Behnken
Robert Louis "Bob" Behnken (born July 28, 1970 in Creve Coeur, Missouri) is a United States Air Force officer, NASA astronaut and former Chief of the Astronaut Office. Behnken holds a Ph.D in Mechanical Engineering and holds the rank of Colonel in the U.S. Air Force. Col. Behnken has logged over 1,000 flight hours in 25 different aircraft. He flew aboard Space Shuttle missions STS-123 and STS-13
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Topic Review
HH Ferry Route
The HH Ferry route (About the name: Helsingør–Helsingborg; Helsingør is Danish for Elsinore) is a very old shipping route which connects Helsingør on Zealand, Denmark and Helsingborg, Scania, Sweden across the northern, and narrowest part of the Øresund. Due to the short distance, which is less than 3 nautical miles, is it one of the world's busiest international car ferry routes, with around 70 daily departures from each harbour. The oldest-known written mention of the route dates to the German traveller Adam of Bremen in the 11th century, but it has likely been in use much longer. Before 1658, the route was a domestic Danish route. For several centuries, the route has been run regularly by various Danish shipping lines. Its significance grew during the 1950s, but since the inauguration of the Øresund Bridge in 2000, at the southern end of the Øresund, it has lost some significance but remains as one of the world's most important ferry routes, particularly as a cheaper alternative to the bridge tolls. Since 1952, passports have not been required for Scandinavian and Finnish citizens.
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Topic Review
Forth Bridge Approach Railways
The Forth Bridge approach railways were railway lines constructed in the period 1887 to 1890 to form new main lines on the opening of the Forth Railway Bridge. The Forth Bridge opened in 1890 at the Queensferry crossing, and only local branch lines approached the location. The North British Railway built new main lines and upgraded some existing lines. The increase in passenger traffic resulted in serious congestion at Edinburgh Waverley, which was extended and modernised in the years following 1890.
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Topic Review
Vostok 3
Vostok 3 (Russian: Восток-3, Orient 3 or East 3) was a spaceflight of the Soviet space program intended to determine the ability of the human body to function in conditions of weightlessness and test the endurance of the Vostok 3KA spacecraft over longer flights. Cosmonaut Andriyan Nikolayev orbited the Earth 64 times over nearly four days in space, August 11–15, 1962, a feat which would not be matched by NASA until the Gemini program (1965–1966). Vostok 3 and Vostok 4 were launched a day apart on trajectories that brought the spacecraft within approximately 6.5 km (4.0 mi) of one another. The cosmonauts aboard the two capsules also communicated with each other via radio, the first ship-to-ship communications in space. These missions marked the first time that more than one crewed spacecraft was in orbit at the same time, giving Soviet mission controllers the opportunity to learn to manage this scenario.
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