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Date: Mon, 27 Jun 2005 18:50:02 -0600
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Bill Dube <bdube@al.noaa.gov>
Subject: Localized Boiling (was: NPG)
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         You get in trouble if you look at this "too simply."

         If there is a local hot spot, like around the spark plugs, the 
water can boil in just that spot. The rest of the water will be 
considerably cooler, likely well below the boiling point. The local boiling 
will remove an enormous amount of heat from the hot spot. The steam bubbles 
will collapse quickly as they move away from the hot spot and transfer the 
heat into the surrounding water.

         It is kind of like dropping a red-hot bolt into a bucket of water.

         Bill Dube'