this is stl file rc tugboat for 3d printer.

the model was tested in ender 3v2 with 0.4 nozle

the model is separate into a part (modular)

the native dimension is

length : 25 cm widht : 8.5 cm height : 9 cm

what you need to built this

1. bolt m2.5/2 20mm 10x
2. bolt m2.5/2 35mm 3x
3. mini motor dc for (shaft and bearing) for waterproof bearing propeller
4. nut m2.5/2 (2x)

what you get:

1. stl file and pdf instruction

you can scale it but you need bolt size scaled too.