"Jeff Wisnia" wrote in message
...


Jim Wilkins wrote:


A New England winter gives a rain-filled 55 gallon drum a neatly
domed
end.


The water expands as it freezes?
--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.

It freezes first on the exposed top and sides, last on the
ground-insulated bottom which then has the least resistance to
expansion pressure. Above-ground swimming pools are protected by
floating air-filled pillows on top to leave unfrozen or at least
weaker openings for the water in the center to escape through.

If all the pillows deflate the walls bulge instead and I acquire more
highly rust resistant sheet metal for projects.