I spent ages on the lines of stratocruiser and its variants, but with the hint of only one made this is Douglas XB-19.

It is indeed.
Over to you Beamr. :ok:

Here you go.

https://cimg0.ibsrv.net/gimg/pprune....5ffe956eb0.jpg

Finnally you lighten up our day.

Italian....?

Well there is a rainbow after every storm, you know.

Nope.

VL Pyorremyrsky(Hurricane) ....?

Kirkastaa
brighten or enlighten

The only connection I see leads me to the Caudron C714 but I'm not convinced.

Sycamore is on the tracks but not quite there yet.

I am not quite sure what SLB is after :confused:

Caudron it is not.

They made 51 of these and a few saw action before the WW2 ended. No aerial victories but no losses either. The only recorded aerial fight was a contact with a Yak and ended to a tie.

Valmet Vihuri then?

Sorry, getting colder. Vihuri was post-war.

The turn knob in the middle made it clear to me that the cockpit was Finnish.

https://cimg3.ibsrv.net/gimg/pprune....bc21e8ac9.jpeg

Ah, quite right! :ok:
But, I must once again wonder how on earth did you get it that fast. I thought i'd give you guys a decent puzzle this time.

For the others you apparently did.
I try to be extremely cautious with adding clues to one others challenges.
As what might be obscure to me might very much help some others.

I find sometimes I came a cross a clue when searching the web on a previous challenge - and sometimes I remember (not often)

I hear you, the Mirage I on the sister thread was something I had recently ran into pursuing some other challenge hence knew immediately what it was about.

This challenge though is still missing the correct answer.

The VL Myrsky II (Storm)...?

Correct.

And what comes to the brightening knob, it is the sight illumination adjustment.

https://cimg8.ibsrv.net/gimg/pprune....4ded6b2e65.jpg

Thanks Beamr. The only clues I grasped were Finnish and 51.

Apologies - but this is all I have to offer...


https://cimg5.ibsrv.net/gimg/pprune....9a666c5ecd.jpg