2-Rotor Rotary Engine Desk Toy

Fidget toy modeled after the Mazda 13B rotary engine proportions. The entire assembly is printed, though gluing the bearing to the shaft is recommended.

Print 2 rotors and one of each other piece. Assemble by placing one rotor onto the gear in the case and inserting the shaft through it. Place the other rotor on the other side, pointing opposite the first one, and secure it by putting the bearing on the shaft.