Krupp 77mm L/35 Flak 3D printed

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EPOCH3
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Location: RI USA

Krupp 77mm L/35 Flak 3D printed

Post by EPOCH3 » 15 Oct 2016 14:54

Another slightly obscure project based on the WWI French 75mm Mle 1897 project.
Many French 75mm guns were captured during the great War and approx. 400 of those
repurposed as 77mm L/35 Flak guns. It was cheap and quick. My project reused
the barrel, wheels, brakes from the French design completely. The shield assembly
was modified and the French carriage assembly chopped up with portions of those
components reused as well. A completely new carriage was needed as the Germans
made a purpose built carriage for this equipment.

Please find attached a few quick pictures showing most of the parts that were
just received. Over all the parts look very good. I was especially happy with the carriage.
I decided to integrate the brake assy just to make the design less expensive and to increase
structural integrity (the brake assy is very fragile if printed separately). The design utilizes
a large spring which I decided to try and replicate. I was unsure whether the higher, more brittle
polymer material would work so I made it in both the polymer as well as the more
flexible sintered nylon. To my amazement, both parts turned out well and are functional.
You can see however from the picture that the nylon spring prints out slightly larger than it
should.

I also included a screen capture of the actual CAD model used in the project. I show the Flak piece
in both it's traveling position and an elevated position preparing to be used. Also shown are two
limbers (French and German) that would have probably been used to tow the piece. The German
limber is another small project being printed now and I will upload some pictures once I receive the
parts back from the printer.

Happy history - Happy modeling

more later
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EPOCH3
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Posts: 479
Joined: 30 Jul 2006 22:22
Location: RI USA

Re: Krupp 77mm L/35 Flak 3D printed

Post by EPOCH3 » 15 Oct 2016 14:56

Two more pictures
Regards
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David W
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Joined: 28 Mar 2004 01:30
Location: Devon, England

Re: Krupp 77mm L/35 Flak 3D printed

Post by David W » 17 Oct 2016 07:00

What scale are you printing at please?

EPOCH3
Financial supporter
Posts: 479
Joined: 30 Jul 2006 22:22
Location: RI USA

Re: Krupp 77mm L/35 Flak 3D printed

Post by EPOCH3 » 17 Oct 2016 13:31

Hi - all of my projects are printed in 1/35th scale but using shapeway's
scale option I also make them for a friend in 1/32nd scale. They can be
essentially printed in any scale you wish (assuming that the model fits
within the building envelope for the selected material).
Kind Regards

EPOCH3
Financial supporter
Posts: 479
Joined: 30 Jul 2006 22:22
Location: RI USA

Re: Krupp 77mm L/35 Flak 3D printed

Post by EPOCH3 » 19 Oct 2016 17:01

Hi - As promised, here are the parts I just rec'd for the German 77mm Fk 96 n/A
Protze that I recently did for a friend and myself (to pull both the 77mm Fk 96 and the 77mm Flak L/35).
This is a fairly simple design intended to be pulled by horse. I sprued several singletrees to the
rear gate which helps to keep things from warping during printing and also reduces costs.
Perhaps I will try and do a few 3D printed horses to go with the model as another experiment.

Kind Regards
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EPOCH3
Financial supporter
Posts: 479
Joined: 30 Jul 2006 22:22
Location: RI USA

Re: Krupp 77mm L/35 Flak 3D printed

Post by EPOCH3 » 19 Oct 2016 17:05

One more picture showing underside - this shot also shows how transparent
the UV sensitive photopolymer material is.
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