The Bismarck was not sunk by aerial launched torpedoes. She was sunk out
in the Atlantic ocean by attacks from a number of British surface ships
after a torpedo fired by one of them (The cruiser HMS Norfolk I think)
jammed her rudder so that she could only steam in circles while they all
had a go at her.

Actually the steering compartment was hit by Fairey Swordfish aircraft from
the Arc Royal. The same string and fabric biplanes that were shot down in
the channel dash. She was finished off by the Rodney and the King George V
with an assist from the Norfolk and the Dorsetshire.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com