We often glimpse a plane in the sky with no greater understanding of the principles involved than a caveman. How do these heavy machines take to the air? To answer that question, we have to enter the world of fluid mechanics. Physicists classify both liquids and gases as fluids, based on...
and the grand total is incalculable. it is easy to take the physics of flight for granted, as well as the ways in which we exploit them to achieve flight. we often glimpse a plane in the sky with no greater understanding of the principles involved than a caveman. how do these heavy ma...
Most commercial airplanes fly at 30,000 feet, which is 5.7 miles, so imagine $100 bills reaching thirty times higher than the clouds and you'll be getting somewhere close to $275bn. And now imagine what sum of money could make these mega-billionaires look like paupers. Yes, today, we ...
These data reveal an athlete's workload-how often they train and how intensely. Just enough training can pave the way to medals, but too much puts pressure on the body and can lead to injuries. Sport is gradually entering a new era, in which artificial intelligence might act as an assist...
In1958,AustralianscientistDavidWarrendevelopedaflight-memoryrecorderthatwouldtrackbasicinformationlikealtitudeanddirection.Thatwasthefirstmodelforablackbox,whichbecamearequirementonallU.Scommercialflightsby1960.Earlymodelsoftenfailedtostandcrashes,however,soin1965thedevicewascompletelyredesignedandmovedtotherear(尾部)of...
William Powell Lear was born on June 26, 1902, in Hannibal, Missouri, and later moved to Chicago with his mother after she divorced. He developed a love for airplanes, even though his first flight, when he was 17, ended in a minor crash. His second ride was to be aboard a Goodyear...
In 1958, Australian scientist David Warren developed a flight-memory recorder that would track basic information like altitude and direction. That was the first mode for a black box, which became a requirement on all U.S. commercial flights by 1960. Early models often failed to withstand crashe...
In the early 2000s when fatal accidents happened significantly more often than they do now, airline reputations could be broken by a single crash, and they knew it. Of course it’s not as simple as that. It never is. Much has happened to the commercial air transport and aerospace ...
whichbecamearequirementonallU.S.commercialflightsby1960.Earlymodelsoftenfailedtowithstandcrashes,however,soin1965thedevicewascompletelyredesignedandmovedtotherearoftheplane–thearealeastsubjecttoimpact–fromitsoriginalpositioninthelandingwells(起落架舱).Thesameyear,theFederalAviationAuthorityrequiredthattheboxes,which...
Tilden said airplanes don’t have door keys or ignition keys like cars do. Horizon Air President and CEO Gary Beck said the company has a 24/7 employee-assistance program available to address mental-health needs, but he didn’t know whether this employee had made use of t...