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Serializer

App\Entity\MediaTranslation {#1405
  -id: 2586
  -title: "Steam locomotive"
  -description: """
    <p>A steam engine converts thermal energy (heat) into mechanical energy (work) using the following process:&nbsp;</p>\r\n
    \r\n
    <p>&rArr; Burning coal in a furnace (combustion).<br />\r\n
    &rArr; Recover heat to heat water and turn it into steam.<br />\r\n
    &rArr; Heat and confine the steam produced to obtain high pressure steam (live steam).<br />\r\n
    &rArr; Use pressure generated to push a piston within a cylinder.<br />\r\n
    &rArr; Transforming translational movement of the piston into a rotational movement by a crank system.<br />\r\n
    &rArr; expel combustion gases and the expanded vapor.</p>\r\n
    \r\n
    <p>The first steam locomotives appeared in the early 1800s after the invention of the steam engine. Efficiency was greatly improved with the principle of the dual action machine in which a sliding valve distributes the pressure on the right and left so that the piston is driven in both directions.<br />\r\n
    <br />\r\n
    The piston is connected to an axle (driving axle) and tie rods are used to drive other axles. The largest steam locomotives had five driving axels (10 wheels for the &quot;Santa Fe&quot; type locomotives).<br />\r\n
    <br />\r\n
    The low yield of steam explains their disappearance in the 1960s in favor of diesel and electric motors. However, their use for 150 years has accompanied one of the most profound changes in our society: the industrial revolution.</p>
    """
  -legends: """
    Smokebox\r\n
    Firebox\r\n
    Boiler\r\n
    Chassis\r\n
    Piston\r\n
    Water\r\n
    Steam\r\n
    Driving wheel\r\n
    Coupled driving wheel\r\n
    Chimney\r\n
    Sliding valve\r\n
    Thermal image\r\n
    Source: sonel.pl
    """
  -goals: """
    <ul>\r\n
    \t<li>To illustrate a famous application of the steam engine.</li>\r\n
    \t<li>To explain the operation of the steam locomotive.</li>\r\n
    </ul>
    """
  -more: """
    <p>For centuries, transporting goods was based on <strong>animal power</strong>, mainly the <strong>horse</strong>, which could carry 100kg on its back, pull a &nbsp;500 kg plow and move several dozen tons pulling a barge along a canal.<br />\r\n
    <br />\r\n
    Newcomen, in 1712, invented the <strong>steam engine</strong> which, after many improvements, would revolutionize the world. In the 1800s, the steam engine equiped crew boats and locomotives capable of transporting goods faster and in greater quantities. Rail transport is gradually gaining ground against the river transport.<br />\r\n
    <br />\r\n
    Between the first locomotives (Pen-y-darren Trevithick, Stephenson&#39;s Rocket) and locomotives of the twentieth century, many improvements appear even if the basic principle remains the same.</p>\r\n
    \r\n
    <ul>\r\n
    \t<li>Separation between the firebox and the boiler.&nbsp;</li>\r\n
    \t<li>Use of a <strong>tubular furnace</strong>.&nbsp;</li>\r\n
    \t<li><strong>Dual motor action</strong> with slide valve.&nbsp;</li>\r\n
    \t<li><strong>Walschaerts valve gear</strong> for transmitting movement of the piston axle (not shown in the animation).&nbsp;</li>\r\n
    \t<li>Safety valve to relieve overpressure.&nbsp;</li>\r\n
    </ul>\r\n
    \r\n
    <p>The railway boom filled the enormous need for steel for the construction of trains, rails and bridges stimulating the steel and coal mining industries.</p>
    """
  -scenario: null
  -features: "<p><strong>Click</strong> on the active areas to illustrate the operation of the locomotive.</p>"
  -publishedAt: DateTimeImmutable @1431302400 {#1402
    date: 2015-05-11 00:00:00.0 UTC (+00:00)
  }
  -preventIndexForSearch: false
  #locale: "en"
  #translatable: App\Entity\Media {#1308 …}
  #status: "published"
  #createdAt: DateTime @1402264800 {#1403
    date: 2014-06-08 22:00:00.0 UTC (+00:00)
  }
  #updatedAt: DateTime @1704061980 {#1404
    date: 2023-12-31 22:33:00.0 UTC (+00:00)
  }
}

[
  0 => "internal_api_media"
  "internal_api_media_options" => [
    "withBaseNodeName" => true
  ]
]