[Gasification] back to hard "tinkering"

[Walt Patrick]

At 08:31 PM 2/3/2007, John wrote:
>The only shape that will focus the rays of the sun is
>a hyperbola.  A skilled person could crudely warp the walls
>of a half cylinder into a hyperbola shape by cutting off the
>ends and attaching hyperbola shaped ends.

True, but a person who was merely clever would just take the ribs off 
an old satellite dish, butt them together in sets of two along a 
spine, and attach the sheet metal to the ribs.

Walt