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Schamlturm for 3d printing
Posted: Wed Oct 11, 2023 11:10 am
by Edumardo
Hello,
I was a little surprised when I saw that there was no printable model of the schmalturm turret, so I decided to start designing it myself.
The Schmalturm (German for "narrow turret") was a tank turret designed for use on the Panther Ausf. F medium tank. There was a Krupp proposal to fit it onto the Panzer IV medium tank as well. It featured a narrow front to maximize protection while minimizing weight. It was both lighter and easier to manufacture than the standard Panther turret. The turret had a stereoscopic rangefinder with lenses on either side of the turret, located in spherical bulges. No Schmalturms entered series production. (source:
Wikipedia).
Schmalturm at the Bovington Tank Museum (source:
wikipedia):
- Schmalturm_at_the_Tank_Museum,_Bovington.jpg (362 KiB) Viewed 3960 times
Panzer Tracts 5-4 book ( Panzerkampfwagen Panther II and Panther Ausfuehrung F) has a good blueprint of the turret on page 5-260, and it will be my primary source, will be my main source, along with the few real photos that exist.
Source: Panzer Tracts 5-4, copyright in the blueprint.
- 2023-10-11 12_22_49-Window.png (271.23 KiB) Viewed 3960 times
- 2022dafe624522ed4aeba60683019a79.jpg (57.89 KiB) Viewed 3960 times
Re: Schamlturm for 3d printing
Posted: Wed Oct 11, 2023 11:17 am
by Kaczor
Edumardo wrote: ↑Wed Oct 11, 2023 11:10 amI was a little surprised when I saw that there was no printable model of the schmalturm turret
Perhaps because you can buy a ready-made turret from Taigen
But good luck and I'm waiting for your progress
Re: Schamlturm for 3d printing
Posted: Wed Oct 11, 2023 11:21 am
by Edumardo
Hi again,
I started designing the commander's cupola, quite similar to Panther Ausf.G cupola but slightly different.
The design:
- 4b.png (272.29 KiB) Viewed 3955 times
And the test print with filament. I think that with a good sanding and processing it would work perfectly, obviously printed in resin it would be much better
- 8.jpg (465.36 KiB) Viewed 3955 times
- 9.jpg (453.31 KiB) Viewed 3955 times
Comparison Schmalturm cupola vs Heng Long cupola:
- 10.jpg (641.25 KiB) Viewed 3955 times
Re: Schamlturm for 3d printing
Posted: Wed Oct 11, 2023 11:43 am
by Edumardo
Re: Schamlturm for 3d printing
Posted: Sat Oct 14, 2023 10:37 pm
by Edumardo
Hi all,
I think I finished all the details, time to complete the elvation and recoil system, I will use two MG90 servos because I have good experience with them.
Somo pictures of the design
- 16.png (394.83 KiB) Viewed 3893 times
- 15.png (554.25 KiB) Viewed 3893 times
- 14.png (411.9 KiB) Viewed 3893 times
Printing that long barrel will be quite a challenge on my small printer (180x180x180), it will have to be divided into two pieces. But the entire turret fits in it, a sample
:
- WhatsApp Image 2023-10-14 at 23.46.01.jpeg (107.24 KiB) Viewed 3893 times
I couldn't resist taking this photo with the Panther Heng Long upper hull:
- WhatsApp Image 2023-10-14 at 23.46.49.jpeg (111.28 KiB) Viewed 3893 times
Re: Schamlturm for 3d printing
Posted: Wed Oct 18, 2023 7:58 am
by Edumardo
Hi friends,
Let's now see the movement of the barel. I have used two MG90 servos, one for recoil and one for elevation, and a standard heng long gearbox for turning.
The barrel pivots between the front and the outer disc, fastened with two screws.
- 2023-10-18 08_42_59-Schmal _ Assembly 1.png (147.54 KiB) Viewed 3835 times
- 2023-10-18 08_42_18-Schmal _ Assembly 1.png (150.09 KiB) Viewed 3835 times
The recoil system moves the barrel through a channel, with a small tab to prevent it from rotating on itself.
- 2023-10-18 08_45_53-Schmal _ Assembly 1.png (115.76 KiB) Viewed 3835 times
- 2023-10-18 08_45_05-Schmal _ Assembly 1.png (218.66 KiB) Viewed 3835 times
- 2023-10-18 08_48_01-Schmal _ Assembly 1.png (268.2 KiB) Viewed 3835 times
For turret rotation, I have used the same system of heng long with its turret ring.
- 2023-10-18 08_51_29-Schmal _ Assembly 1.png (147.43 KiB) Viewed 3835 times
Ok, this is very nice but where are the photos and videos?
The barrel and pivoting frame require a good sanding and adjustment to make it slide well and avoid too much rubbing. Maybe a drop of lubricant would be appropriate
Re: Schamlturm for 3d printing
Posted: Wed Oct 18, 2023 8:55 am
by Kaczor
Nice!
Re: Schamlturm for 3d printing
Posted: Wed Oct 18, 2023 9:30 am
by 971wright
Very nice job looks spot on.
regards pete
Re: Schamlturm for 3d printing
Posted: Wed Oct 18, 2023 9:33 am
by Tiger6
You might want to add a counter weight under the gun breech to reduce the strain on the elevation servo.
Re: Schamlturm for 3d printing
Posted: Wed Oct 18, 2023 10:33 am
by Edumardo
Tiger6 wrote: ↑Wed Oct 18, 2023 9:33 am
You might want to add a counter weight under the gun breech to reduce the strain on the elevation servo.
Thanks for the advice!.
I didn't say but I'm using the TK-26 board for testing.