The Piranha is a fast yet easy to fly small sports plane with retractable landing gear. The original model was available in the late 70s as a kit with a glass fibre fuselage and foam core wings. It was designed around the Webra Speedy 15 2-stroke engine (1.8 ccm) including resonance silencer.
The 3d printable replica is designed for a brushless motor and a 3 cell lipo battery and sculpted after the original plan. The size fuselage cross sections and used Airfoils are identical to the original.
You can download a free section of the fuselage and the wing to test your print settings. Both parts need no support and no infill.
Perimeter: 2 (from 0-1.5 mm) / 1 (from 1.5mm to top)
Layerheight: 0.25 mm
Print without fan and do not print too fast (60 mm/s is ok)
Youtube Playlist with assembly and maiden flight:
download all missing files here: