Model Airplanes

An artist’s impression of MIT’s ion drive aircraft.Courtesy of Nature

Last week, researchers at the Massachusetts Institute of Technology announced that they’d conducted a successful flight test of an aircraft with a sci-fi-sounding propulsion system called an ion drive, an achievement that’s earned comparisons to the Wright brothers’ breakthrough at Kitty Hawk.

Inside a gymnasium at the Boston-area university, the team propelled a fixed-wing aircraft with wind generated by the flow of ions accelerated by a high-voltage array of electrified wires. The propulsion system has no moving parts. The initial eight-second flight could be the first step on a path to a tantalizing future of radically different-looking aircraft that fly silently—without burning fossil fuels.

The physical mechanisms involved in generating an ionic wind have been understood for more than 100 years, but it had been largely dismissed as incapable of producing enough thrust to power an aircraft. Only a small number of researchers have been working on the technology. “Maybe we’ll have to have a conference now,” quipped the leader of the MIT team, Steven Barrett, in an interview with Forbes. At the smaller end of the equation, researchers at the University of California, Berkeley, have been working on using ionic propulsion to fly centimeter-scale microrobots.

Barrett’s proof of concept aircraft, which his team detailed in a paper published in Nature, was propelled by the movement of ions between two electrodes. Thin wires strung horizontally underneath the 15-foot-long wings were charged to a prodigious 20,000 volts, stripping electrons from nitrogen molecules

Article source: https://www.forbes.com/sites/jeremybogaisky/2018/11/30/ion-engine-mit-solid-state-aircraft/

The British Medical Journal recently reported a case of “Cardiac arrest by inhalation of deodorant spray.” The culprit wasn’t any of the “active” ingredients, but rather the gas used as a propellant to expel the contents from the container. Butane can cause cardiac arrest when inhaled in an abusive fashion by people looking for a “high.” According to the case report, a 19-year-old man sprayed deodorant under a towel placed over his head and took some deep breaths. They were the last ones he would ever take.

Butane is fat-soluble, which means it can readily cross the blood-brain barrier, a network of cells that protect the brain by excluding water-soluble substances. Once it enters the brain, butane can cause euphoria, relaxation and an altered mental state. But it can also result in a permanently altered state, namely, death. Unfortunately, the inhalation of volatiles goes beyond deodorants, with vapours from lighter fluid, nail polish remover, shoe polish, computer dust spray and glue also being abused.

Volatile substances can be inhaled from a bag (bagging), directly from a container (sniffing), or by placing a cloth soaked with a chemical over the nose and mouth (huffing). Even sub-lethal exposure can cause headaches and vertigo as well as a feeling of lightheadedness. I have been following the rather extensive literature on “inhalants” ever since I had a personal encounter with the solvents used in whiteboard markers.

Although I use slides extensively in most of my lectures and public presentations, I’ve always found the blackboard to be very

Article source: https://montrealgazette.com/opinion/columnists/the-right-chemistry-the-dangers-of-organic-solvent-syndrome

In December 1903 it rose in the sky the world’s first motor plane. It was a biplane “Flyer 1”, built by inventors camocamo the Wright brothers. His flight lasted only 12 seconds, but with this event began a new era in aviation.

A century later, in 2003, Leonid Kovalchuk, aircraft manufacturers from Bukovina – also undertook personally to make a biplane. Prototype chose British aircraft “Where Gilland”, material – Carpathian pine. Now his creation is almost ready. Left to attach wings, install the engine and take the helm.

Biplane

Bbloom call a plane with two wings arranged one above the other. A feature of this aircraft is that it is quite agile and does not require great speed for takeoff and landing.

In Ukraine the first biplane flew in 1910 at the Hippodrome in Kiev, however at that time it was the territory of the Russian Empire. The plane was named after its developer Alexander Kudashev, designer and Professor of the Kiev Polytechnic Institute. He lifted the plane into the air, and in one of the then magazines Kudasheva called the first Aviator of the Russian Empire.

The advent of the first four-engine biplane aircraft obliged to Igor Sikorsky, a Ukrainian by origin. As a student of the Kiev Polytechnic Institute, he designed several models of helicopters and airplanes. It was during the construction of its biplane “Ilya Muromets” for the first time in world practice was designed solid fuselage. And the plane

Article source: https://ktelegram.com/aviator-from-bukovina-to-construct-the-unique-plane-tree-24-channel/61654/