"Richard Casady" wrote in message
...
On Wed, 3 Dec 2008 11:28:46 -0800, "Calif Bill"
wrote:

The problem with lots of the aluminum ship structures was bad design.
Lots
of cracks happening. So better designers were needed. Harry maybe?

Actually, since aluminum and steel have the same strength to weight
ratio, it would seem that someone heard rumors that aluminum is
lighter, and designed it that way. Lighter is weaker. Duh.

Casady


Good grief.

Use steel in the places you need strength.
Use aluminum in the places you need light weight.
Use titanium when you need both.

Eisboch