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Re: Attic ventilation from fans - to jet engines -- to steam locomotives :)

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On May 17, 2006, at 1:01 PM, Rhkratzse(--nospam--at)aol.com wrote:

And I'll admit to a tiny bit of confusion about why the steam that drives the pistons that drive the wheels that drive a steam locomotive *always* goes in the right direction and doesn't just come back out of the rear end and scald the engineer, or at least just push the water back into the tender ("coal car").  :)

You mustn't tell anyone about this since it's a trade secret. Each steam engine came with a little Dutch boy who would stick his thumb in a hole in the top of the cylinder and keep the steam from leaking out. He was specially trained because he could only block the hole when the cylinder was at bottom dead center or he'd get his thumb squashed and it wouldn't come out and then the steam actually would blow back into the engine cab. Lucky for us the Dutch got so much better at hydrology so there was a surplus of little boys who would otherwise be earning medals by sticking their thumbs into holes in dikes and not fiddling around with steam engines.

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw(--nospam--at)skypoint.com   | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania 1864)
http://www.skypoint.com/~chrisw/


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