The Zero's tailfeather design.

[Garfly]

An interesting video with a savvy comments section (might need to click through to view on YouTube's own site.)

 

 

 

 

[Old Koreelah]

It was a brilliant design in its day, and exceeded performance expectations.

 

Avoiding the rudder being blanketed by the horizontal plane is one of the important lessons in aircraft design, but it's sometimes ignored even today.