stena

Rui S
From my album.
In 1941 the production of civilian motorcycles was stopped. Germany was at war and production was adjusted to the needs of the Wehrmacht. BMW motorcycles have always been popular with authorities - and thus also with the military. Single-cylinder models were used as light courier and training machines, and the R 12 was delivered to the Wehrmacht as a side car.
However, the war policy of the Germans required a motorcycle Side car that could be safely mastered on any surface - mud, ice, gravel, desert sand - and that required only little maintenance even at extreme temperatures and heavy loads. In addition, the motorcycle should also be able to cope with longer distances at low marching speeds without any problems.
No German motorcycle manufacturer had such a machine in their range, which is why a special development order was placed with BMW and Zündapp. In the winter of 1938, BMW began work on this project based on the R 71 engine. The beams of the bolted tubular frame were divided. This enabled the engine to be installed and removed quickly, as the lower frame part could simply be folded away. A rear wheel suspension was omitted for better stability. But while the frame proved itself during the test drives, there were thermal problems with the side-controlled motor in off-road use and on longer trips at walking speed. So BMW developed a new engine.
The result was a 750 cc unit with an output of 26 hp at 4000 rpm. The engine developed an enormous torque and, since it had a very low compression ratio of 5.8:1, it could also easily tolerate poor-quality or synthetically produced fuel. In contrast to the R 71 engine, no heat problems occurred during testing, so that the R 75 could go into series production in 1941.

And

Series production of the R 75 begins
date from07.1941.
Description
In July 1941, the first R 75 sidecars rolled off the assembly line in Munich. However, after production was relocated from Munich to Eisenach in June/July 1942, the majority of the R 75 was manufactured in Thuringia. The R 75, with seven forward and two reverse gears and a powered sidecar, was specially developed and produced for the German Wehrmacht.

Pietro De Angelis
I'm so sorry Rui,
thanks so much for the explanation,
you're absolutely right,
i purposely included the premise about my limited historical knowledge,
all you had to do was go and read wikipedia...
I remembered 1942 but BMW had already been in production for a year,
in 1942 after the superiority of the Zundapp KS750 was now clear the army asked to unify production by coupling the Zundapp KS750 to the BMW 286/1 sidecar, mea culpa...
Thanks again and congratulations on your historical knowledge

Neuling
Looking forward ........

Spanjaard
vehicles look really good, looking forward the rest of the dio

Spanjaard
this is looking really interesting, following with interest......

Mathias Decommere
Thx Spanjaard! I hope it turns out as I'm imagening it!

Thomas E.
Do you know Virtual Vietnam War Museum? If you like: w.vietnam.net.pl/ind_en.htm
Greatings TT

Mathias Decommere
That is a very nice tip! Thx man!

Mathias Decommere
You can say that gorby, Belgium is a recent country (1830) , but it's lands and structures has endured a lot of occupations: Romans, Germanic, Austrians, Spanish, French, Dutch, Germans,... 🤗

Neuling
And tourists like me: Not long ago I enjoyed a bicycle ride from Antwerpen via Gent to Brügge ......

gorby
I missed it as well. Remarkable work! Very convincing vegetation.

Mathias Decommere
@Jan Peters: Thank you Jan! It was challenging and fun to scratchbuild
@Thomas: Thank you very much, it was my first attempt
@Bruce: your comment is very appreciated, glad you enjoy it now. Very kind words!
@gorby: Thank you Gorby, all vegetation is self made:

Creating nature | Album by Templar1099 (1:35)

Mathias Decommere
O wauw! I wish I had this tip before I started building😅

Rui S
Thx for sharing that great link Thomas.
Now i know something more about the photo that inspired my "The unexpected Finland resistance - T26", dio.

Dietmar Bogatzki
Fantastic 👍

Mathias Decommere
Thanks mates for the kind comments! Their mother was very happy with this and also to see that I can make other stuff than war stuff😁

CaptGPF
Watching!

Mathias Decommere
Thx for the support!

Mathias Decommere
Thank you very much Bruce and David, I must say I'm a bit surprised myself how smoothly it went already. But still a lot to learn as well offcourse.

Mathias Decommere
I decided to transform them into motorcycle crew in favour of the diorama's story

gorby
It's the one thing which puts me off getting a 3D printer. Everyone how I know who has one has encountered problems initially. Hope you get it sorted out.

Shar Dipree
Following!

Mathias Decommere
Calculations for a selfmade paint rack

Joachim P.
Hello, Mathias! Again a stunning and to-learn-from diorama! My hat off!

Mathias Decommere
Many many thanks Diorama dude and Joachim P. !

Mathias Decommere
Thanks for the confirmation! 😛

Guy Rump
Very nice build. 👍

Shar Dipree
Nice idea in a great dio. 👍👍👍

Mathias Decommere
Thanks for the nice comments!

Jennifer Franklin
Following 👀, love the coats.

Mathias Decommere
Thanks Jennifer! It's was a new challenge for this project and although I'm happy; there is still a lot more room for improvement, but I'm learning!

Mathias Decommere
Thanks Guy! Means a lot!

Mathias Decommere
I did An update of the album with different photo preferences and setup

Bobby Thumbs
awesome

Pietro De Angelis
Beautiful scene!

Doubtingmango
Taking my seat!

Mathias Decommere
Thx for joining!

Guy Rump
Lovely job, very impressive concept. 👍

Mathias Decommere
Thx Guy!