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"Double Heading" with steam engines back in the early days...?
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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 think what you are seeing is that the boiler jacket continues all the way to the front of the smokebox.<span style="mso-spacerun: yes;"> </span>I have seen other earlier locomotive with that feature.<span style="mso-spacerun: yes;"> </span>I don’t know if they did that for the function of retaining heat in the smokebox or if it was for aesthetics.<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;">Most often, the boiler jacket and lagging stops at the joint with the smokebox because that is the end of the pressure vessel.<span style="mso-spacerun: yes;"> </span>And because that insulation is a couple inches thick, the visible diameter of the boiler steps down prominently at that joint.<span style="mso-spacerun: yes;"> </span>But, in the case of #999, that visual step down is missing because the jacket is extended over the smokebox.<span style="mso-spacerun: yes;"> </span>So that makes the whole boiler look like it might not have a jacket.<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;">I think I can see the bands that hold the boiler jacket in place, and if there were no jacket, lots of rivet heads would be showing.<span style="mso-spacerun: yes;"> </span>I assume the domes are not jacketed, but just finished well and painted with a gloss.<span style="mso-spacerun: yes;"> </span>They fit the boiler jacket so well that the joint does not show.<span style="mso-spacerun: yes;"> </span></span></span></span></p>
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