I'm going to try one more thing to convince you.

The front end of shaft has a radius of .589"

The rear end has a radius of .7065"


.589^4= .120

.7065^4=.249

That seems to me that the front end will carry about ½ what the
back end will.  I agree that you wouldn't want to load the
front with the entire load, but I still can't see why it
couldn't carry ½?


BTW, my other calculation shows that Mazda must have used
a fudge factor of 2X in the e-shaft design.  Do they fail
frequently at 400hp?

Decker

I am not convinced :)

Paul Lamar