Last Clue
" ?????????? won long distance flying competitions in 1938 and an example flew 40,000 km around Africa in 1939."

Uhm, He-111A?

No not a He-111?

So no stewardess this week.
The answer is Siebel Fh 104 'Hallore'
LINK--- http://axis-and-allies-paintworks.com/e107_plugins/forum/forum_viewtopic.php?13366.post

A little easier this week ??

Have fun.

Martin B-12.

Well done Jim it is.
The photo is a test of a 20mm in the rear gunners position.
LINK-- https://en.wikipedia.org/wiki/Martin_B-10
And the prize of course.

This weeks headache?

Have fun.

A huge clue ??
This aircraft had two forward firing 37mm cannon

Is it the Bell XFM Airacuda?