Reply to "New exhaust to cure a hot-running engine"

Gordon NicholsMassachusetts 1993 CMC Supporting Member

The later (1970-on) fan shrouds for the wider/larger capacity fans and larger oil cooling towers had a non-moving velocity ring riveted to the back of the housing. Earlier shrouds had a moving velocity ring that provided less air flow when cold and more flow when warm. Pretty ingenious, actually. The later shrouds are not domed, like the coveted 36hp shrouds, but are flat across the top, like this:

(This is the first GIF file I've gotten to load on this site in over a year....)

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5/5/1912:06 PM

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    </script></li></ul><a href="javascript:void(0);" class="close-reveal-modal" aria-label="Close Modal">&#215;</a><div class="last-modal-focus focus-utility-element" tabindex="0"></div>
</div>
<script type="text/javascript">
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