Half-scale (1:2) flat-12 racing engine model, 3D printed from the client's design
A 1:2 scale, multi-colour 3D printed model of the Porsche 917's 12-cylinder engine with a hand crank, finned cylinders, crankshaft and camshaft drive, printed by PrototypeBD from the client's design.
Specifications
- Drive
- Hand crank
- Type
- Mechanical engine model (moving)
- Subject
- Porsche 917 flat-12 engine (as named in the post)
- Scale
- 1:2 (as stated in the post)
- Design
- Client design (PrototypeBD printed it)
- Process
- FDM 3D printing, multi-part assembly
- Colours
- Grey, black, red and blue printed parts
- Completed
The post describes this as a 1:2 scale, fully functional model of the 12-cylinder, 180-degree engine from the Porsche 917 race car. The design came from the client; PrototypeBD printed it.
A model that moves
A red hand crank sits on the front of the crankcase, and the open sides show the parts that turn with it: the crankshaft and connecting rods in the middle, and the camshaft drive running along the cylinder heads with a blue gear at one end. The large cooling fan housing sits on top, as it does on the real engine.
Printing a mechanism
The twelve cylinders carry fine cooling fins, printed in grey, with black heads and red details, so the eye can follow each sub-assembly. Moving parts need room to move: PrototypeBD normally leaves about 0.1 mm of clearance between mating parts, and 0.1 to 0.3 mm depending on the material and printer. Small metal pins are visible in the close-up, at the joints where printed plastic alone would wear.
Teaching models like this let students and enthusiasts see an engine cycle with their own hands.
Design: the client; 3D printing: PrototypeBD.
Read more: the full guide on our blog.