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[Radoye]

Sorry mate, i didn't notice yours wasn't guessed yet. I saw a new pic posted and went for it. :|

[locopiston]

All very nice, but I still do not know why the propellers of the North American XA2J Super Savage are different from one engine to another.

I hate correcting people ...
but now, after doing some research, I think Max's answer was incorrect.
It is a "Farmall super A-TA dual whell".


Incredibly weird of him, since he had previously put him in the trivia.
https://www.sas1946.com/main/index.php/topic,47916.msg591062.html#msg591062
(if mike had risked that it was an F-35 IH NOTOL, it was also right)

So now there's no doubt that it's Lamehawk's turn

[sniperton]

Sniperton: mearly posting a picture of the aircraft in question as your answer is invalid.

Agreed. The contra-rotating three-blade props gave it away in three minutes, and I came across to the picture you posted on a plastics site side by side with the kit. As I know you're involved in plastics, my non-solution was intended as a mere joke. 

[LameHawk]

I must admit I hadn't given the tractor a thought. AFVs (Agrarian Farming Vehicles) are not exactly within my base of experience.

Confusion aside, what's this:

[locopiston]

Of this seaplane with German insignia, I really have no idea.

What I can not solve is a step back from the trivia.

Can someone explain to me why the propellers are different from one engine to another?!?!

sorry for the distraction lamehawk 

[SAS~Storebror]

Aeroproducts was testing different cuff styles on their props.
The left props (red) were the default ones.
During flight tests, at certain RPM vibrations were recorded and the idea was that they might be caused by turbulent airflow on the turbine intake, possibly caused by vortex on the sharp edged default cuffs.
The right props (green) were therefore being tested with angled and rounded cuffs.
You can see markings on one blade of each of the right props, this was to check whether the rounded cuffs would cause the laminate flow to separate outbound the prop's centerline, which is a common issue with rounded cuffs at high AoA.


Mike

[LameHawk]

Silence is golden 

Here is another angle - believe it is the same aircraft

[Shakaali]

KP+MW, I believe 

That is to say it is Marinens Flyvebaatfabrikk M.F.11  (also known as Høver M.F. 11)

[LameHawk]

And that's exactly what it is.
Well done Shakaali - your turn

[Shakaali]

Ok, here you go:

[LameHawk]

From Norway to Latvia.

VEF I-16

[Shakaali]

Yes, Sir!

Your turn, LameHawk!