Print-in-Place WR16 Engine Model

This is the first ever print-in-place, supportless WR 16 engine model. This print is an accurate model of a WR engine (which is most notably used by the car manufacturer Bugatti), featuring a correct firing order of cylinders, the standard 90 deg V with 15 deg offsets for the secondary angle, and 4 valves per piston.

Please make sure you have good bed adhesion or use brim/glue or slow the first layer when printing this model since it has many small first layer surfaces. Also make sure you use a rigid, non-brittle filament for this print (Increasing walls will help boost strength).

Assembly (It is functional without any changes, but in order to have a correct engine, some parts need to move)

Step 1: Notice that the pistons that need to be moved have a larger gap on the bottom of the model (face on the print bed) and smaller gaps on the top. Red arrows show example pistons that need to be moved (Step 2)

Step 2: Rotate each of the pistons as far as possible to form a V shape, then push into the secondary channel.

Result of Step 2:

Step 3: Fold the inner frame pieces into the side with the narrower/inner tabs. There should be a slight click sound.

Step 4: Fold the side with the wider/outer tabs in. There should be a slight click sound.