The STL files are for cheap Chinese rotary encoders like these with 6 mm/4.5 mm D-axis and the Concentric rotary encoder – band switch combi (4 mm brass rod / 6 mm axis), but the source designs are also available as Sketchup 2016 3D model below, so you can modify the hole for the axis to your own needs.
For fixing the knobs to the axes, holes are present for a 5.5 x 5.5 x 2 mm square nut and a cone point M3 x 5 mm screw.
Altitude knob
Sketchup 3D model of the knob without any holes (scale 1 to 100)
Sketchup 3D model of the knob with holes for square nut and M3 screw (scale 1 to 100)
Sketchup 3D model of the real size knob with holes for square nut and M3 screw
STL file of the real size knob with holes for square nut and M3 screw for 3D printing
Bank angle knob
Sketchup 3D model of the knob without any holes (scale 1 to 100)
Sketchup 3D model of the knob with holes for square nut and M3 screw (scale 1 to 100)
Sketchup 3D model of the real size knob with holes for square nut and M3 screw
STL file of the real size knob with holes for square nut and M3 screw for 3D printing
Heading knob
Sketchup 3D model of the knob without any holes (scale 1 to 100)
Sketchup 3D model of the knob with holes for square nut and M3 screw (scale 1 to 100)
Sketchup 3D model of the real size knob with holes for square nut and M3 screw
STL file of the real size knob with holes for square nut and M3 screw for 3D printing
Speed knob
Sketchup 3D model of the knob without any holes (scale 1 to 100)
Sketchup 3D model of the knob with holes for square nut and M3 screw (scale 1 to 100)
Sketchup 3D model of the real size knob with holes for square nut and M3 screw
STL file of the real size knob with holes for square nut and M3 screw for 3D printing
Course knob
Sketchup 3D model of the knob without any holes (scale 1 to 100)
Sketchup 3D model of the knob with holes for square nut and M3 screw (scale 1 to 100)
Sketchup 3D model of the real size knob with holes for square nut and M3 screw
STL file of the real size knob with holes for square nut and M3 screw for 3D printing
Vertical Speed wheel
Sketchup 3D model of the knob without hole (scale 1 to 100)
Sketchup 3D model of the knob with hole for rotary encoder with 6 mm D-axis (scale 1 to 100)
Sketchup 3D model of the real size knob with hole for rotary encoder with 6 mm D-axis
STL file of the real size knob with hole for rotary encoder with 6 mm D-axis for 3D printing
Vertical Speed wheel support
Sketchup 3D model of the real size vertical wheel support
STL file of the real size vertical speed wheel support for 3D printing
