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Wrong type of heat

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    Wrong type of heat

    As temperatures climb in Phoenix, Arizona, more than 40 flights have been cancelled - because it is too hot for the planes to fly.

    Phoenix flights cancelled because it's too hot for planes - BBC News

    The local Fox News affiliate in Phoenix said the cancellations mostly affected regional flights on the smaller Bombardier CRJ airliners, which have a maximum operating temperature of about 118F (48C).
    "A people that elect corrupt politicians, imposters, thieves and traitors are not victims, but accomplices," George Orwell

    #2
    https://en.wikipedia.org/wiki/Density_altitude

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      #3
      Wrong type of heat

      You need a longer runway on a hot day, and the heat (lower pressure) degrades climb performance.
      http://www.cih.org/news-article/disp...housing_market

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        #4
        Originally posted by PurpleGorilla View Post
        You need a longer runway on a hot day, and the heat (lower pressure) degrades climb performance.
        Hmm.......inneresting.

        Comment


          #5
          Originally posted by PurpleGorilla View Post
          You need a longer runway on a hot day, and the heat (lower pressure) degrades climb performance.
          P = VT. Pressure goes up with temperature. Or have I got Boyles law wrong?
          Will work inside IR35. Or for food.

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            #6
            Originally posted by VectraMan View Post
            P = VT. Pressure goes up with temperature. Or have I got Boyles law wrong?
            Only in a confined space. Think what happens in an inter-cooler.
            "A people that elect corrupt politicians, imposters, thieves and traitors are not victims, but accomplices," George Orwell

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              #7
              Temperature drops. Pressure drops and therefore more oxygen molecules are sucked into the engine?
              Will work inside IR35. Or for food.

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                #8
                No, air temp rises, the molecules get further apart and rise at the same time. Hot = High Atmospheric Pressure. It attempts to take up more space, Jet engines need to compress the air but there's a finite limit to how well they can compress already hot air, so yes they do need a longer take off run.

                I used to know all this... Actually effects Piston engines more than jets... If that particular airport has a lot of local prop driven turbojet aircraft there, this might be part of the problem.

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