[Cd]

Ok Freebeard. I learned something new.
I understand having to correct someone when your gears get ground.
For me, it's when people call their truck a 'car'.
Or when people write "That was so funny that I can't breath ! "
This last one I see far too often.

I think that my answer to the most efficient angle for the tail is

42

Faw - Tay - Teeew ??