Bf 109 Structure

[Pitti]

Originally Posted by Sternjaeger II

As for the 109 size, it's an advantage also in terms of strategic production, since you need less material to produce one aircraft.

I still regard the 109 as the most overall efficient and cost effective fighter aircraft of WW2.

+1

And another reason for the size of the 109 (from the book "Spitfire vs Bf 109 - Battle of Britain" by Tony Holmes):

Finally, the design had to be small enough to enable it to be transported by rail.