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Coal Dust
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<p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;">I would be surprised if they have not already built a prototype or even a production unit.<span style="mso-spacerun: yes;"> </span>But curiously, some of their other marketing refers to the covers for coal cars as being intended to reduce aerodynamic drag in order to save fuel, and says nothing about preventing dust from escaping.<span style="mso-spacerun: yes;"> </span>So maybe the coal dust prevention just came along as a better justification for a product that started out intended for a different purpose.<span style="mso-spacerun: yes;"> </span></span></span></span></p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;"> <o:p></o:p></span></span></span></p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;">I don’t find any other details about the concept besides what you have posted above.<span style="mso-spacerun: yes;"> </span>The biggest mystery is how the primary covers are powered open and closed.<span style="mso-spacerun: yes;"> </span>Apparently the secondary covers are opened and closed by gravity if the car is run through a rotary dumper.<span style="mso-spacerun: yes;"> </span>If the car is bottom dumped, the secondary covers would not be opened and closed for either dumping or loading.<span style="mso-spacerun: yes;"> </span>I wonder if the primary covers are opened and closed by pneumatic cylinders fed from the train line.<span style="mso-spacerun: yes;"> </span></span></span></span></p> <p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-size: small;"><span style="font-family: verdana,geneva;"><span style="font-size: small;"> <o:p></o:p></span></span></span></p> <p><span style="font-size: 12pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><span style="font-family: verdana,geneva;"><span style="font-size: small;">Or maybe they would have a second train line through the cars just for operating the covers.<span style="mso-spacerun: yes;"> </span>Then you would simultaneously open and close all the covers in the train.<span style="mso-spacerun: yes;"> </span><span style="mso-spacerun: yes;"> </span></span></span></span></p>
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