Summary This is a generic 1/9 scale 9 Cylinder Radial Engine. Perfect for that WW1 Biplane or Triplane that needs that authentic touch of a radial engine. Printed this one with 0.8 mm walls and 18% infill. This would be perfect for that Fokker Dr1, Nieuport 11, 17, Sopwith Camel / Pup and so on. Please share your makes. Print Settings Printer: Maker Select IIIP I3 Rafts: No Supports: No Resolution: 0.2 Infill: 18% Notes: You can probably stay really low on the infill.