D On my way to coaching basketball yesterday,I was listening to WGN,my favourite talk radio station.I could tell right away that there was something wrong by the serious mood of the speaker.There had been a plane crash.Two small planes crashed into each other over a northern suburb of Chi...
If I could learn one difficult skill, I would learn how to build and fly a model airplane. Model airplanes that are flown by a remote control (遥控器) are very (1) to build and control.Many people think of remote-controlled planes as just toys, but in fact theyˈre (2) real plan...
Many times an ROV is sent down to access the situation so the crew can decide the best course of action for response. If the disabled submarine is simply trapped or has lost power, the ROV can often cut it free or tow it to the surface. Hard-shelled suits that can withstand pressure ...
Many larger prop-driven aircraft boast propellers with adjustable pitch mechanisms. These mechanisms let the pilot adjust the propeller's angle of attack depending on air speed and altitude. There are, of course, variations. For example, in turbo prop planes, a gas turbine spins the propeller, ...
How Do Planes Fly: Thrust and Drag Airplanes take advantage of four forces. Lee Dempsey/HowStuffWorks.com Drop a stone into the ocean and it will sink into the deep. Chuck a stone off the side of a mountain and it will plummet as well. Sure, steel ships can float and even very heavy...
In the event of an air crash or runway incursion (two planes on a collision course), the National Transportation Safety Board (NTSB) investigates. The NTSB team reconstructs the air-traffic services given to the plane, examines radar tracking data and studies transcripts of the controller-pilot...
If I could learn one difficult skill, I would learn how to build and fly a model airplane. Model airplanes that are flown by a remote control(遥控器) are very 1to build and control.Many people think of remote-controlled planes as just toys, but in fact they' re2 real planes. Since ...
In many such accidents, the only devices that survive are the crash-survivable memory units (CSMUs) of the flight data recorders and cockpit voice recorders. Typically, the rest of the recorders' chassis and inner components are mangled. The CSMU is a large cylinder that bolts onto the flat...
Actually, the word and concept aren't new. Neal Stephenson made up the term in his 1991 science-fiction book Snow Crash,in which people use avatars(分身)to explore an online world. A number of small metaverses have since developed, where people can do many real life things—like working ...
an industry going from “zero to 60” as travel rebooted post-lockdown; increased demand for “revenge” travel; and mass retirements across the industry, many of which were encouraged as a way of saving money for companies while planes were grounded. The rebound situation has been “unprecede...