RC Dutch pusher boat "Opduwer"

This is my new project: a pusher boat, or a Dutch "opduwer" from 1927.
"Opduwers" come in various shapes and sizes.

https://nl.wikipedia.org/wiki/Opduwer

The pusher is on a scale of 1:10 and is approximately 60cm long.

The design isn't finished yet!
I'm going to print the hull in PETG for the first time.

I'm currently experimenting with resin (and baby powder) on PETG.

23-7-2025
Parts added and various adjustments made.
Note: I haven't printed anything yet (waiting for the PETG filament to arrive), so adjustments may still be made.

Here's a fun Facebook page with all kinds of "pushers."
This way you can see the variety of these boats.
https://www.facebook.com/groups/1779440105617122/

23-7-2025 Part 2
Railing and various parts added. New STEP file.

30-7-2025
Made an alternative bow, not original, but I think it looks better.

31-7-2025
First parts printed. The hull is bulkier than I expected, so I'll have to buy more lead ;-)

3-8-2025
I printed the last part of the ship's hull today. I couldn't wait, so I glued them together right away.

4-8-2025

For clarity, the STEP file is just for reference. I'll publish the STL files later when I'm almost finished with the boat. Then I'll be sure there are no errors left in the design.

5-8-2025
Small update with a photo. Currently printing the ship's superstructure and sanding the hull.
My experience with PETG is generally good, but next time I'll go back to using PLA+. PLA is a bit harder, which I prefer.
I'm not so impressed with the experiment with baby powder and resin. It works perfectly for filling in larger imperfections. Next time I'll go back to using regular resin (not water-based, as that's too brittle) without additives.

9-8-2025
Printed the boat's superstructure and verified that the fits are very tight. The design was adjusted.
A different propeller shaft length was also used, which required adjustments to the electric motor mount.
The STEP file has not yet been updated. I will upload the STL and STEP files soon.

15-8-2025
The painting was a bit disappointing and needs to be sanded and painted again.
The servo holder is ready and is made for a cheap imitation S3003 servo.
For the electric motor, I used a large Johnson, I think a 775 or 785. I bought this motor years ago, so I don't know exactly which type. It doesn't run very high on 12V. If you use a different motor, you will have to design/make the motor mount yourself.
The propeller shaft (4mm) is from Aliexpress and is 25cm long, and the tube is 20cm long.
I don't have any photos of the partially painted boat yet.
I'm going on a long-awaited vacation, so I'll provide you with the STL and STEP files in advance. These have been requested many times.
Some minor changes may still be needed, but the important parts are good.
So the next update will take a while.

16-8-2025
Almost finished, now just paint the bow around the star white and the star itself red. And the captain still needs to be painted.
 

29-8-2025                                                                                                                                                               Finally painted the bow, not my strongest skill. The skipper and girlfriend glued in place.

1-9-2025                                                                                                                                                                             For enthusiasts, here's a model of an old engine that would have been used in this type of ship.                        I was allowed to adapt the design by the original designer, Jack Jean. https://grabcad.com/library/mwm-sh19z-old-stationary-engine-1933-1 Thank you very much for allowing to use your design.

Here and there, I had to omit small/thin parts due to scale and resin printing. 

The 1 and 3 cylinder versions are derived from the 2 cylinder thanks to Bertus https://www.printables.com/@BeTa5157_3449947

11-10-2025