sg6042 RCM&E panther autogyro blade by WRudy

Last crawled date: 3 years, 3 months ago

EDIT!
v7 available for 0.2 mm nozzle and hidden slots for 6x1 mm CF spars:
10g/126 mm span, uploaded gcode for 126mm span print with PETG at 235/90degC (4 prints per blade), longer span means low quality surface at one end due to printer vibrations (ender 3 pro with direct drive mod)
settings for printing with 0.2 nozzle at spiral mode:
<35 mm/s
0.115-0.119 layer height
100-105% flow
at least 6 mm brim
end of EDIT
A bit tired of playing with cura settings to print the available autogyro blades with acceptable quality I made my own version with sg6042 aerofoil. It was designed for Panther autogyro (from RCM&E magazine) so the chord is 68 mm (slicer cuts additional 2 mm of trailing edge). I have not checked it yet in the air.
IMPORTANT!
IT IS DESIGNED TO BE PRINTED WITH SPIRAL MODE (or VASE MODE).
Your slicer might ignore the geometry and wants to print only one perimeter! In Cura I am using rotating the blade with chord along Y axis helps, playing with the Z-seam position also changes the Cura's approach for slicing ;)
EDIT!
Cura seems to be quite random in loosing some layers in vase mode of such geometry, it took me some time to get best results by:
1) placing the airfoil with chord along Y-axis and rotate few deg to find 'sweet spot'
2) playing with the layer height (0.195-0.199 instead of default 0.2 mm for 0.4 mm nozzle and 0.115-0.119 layer height for 0.2 mm nozzle)
3) increasing the flow to 100-105% to provide some connection between neighbouring layers (flow in my ender 3 pro was initially calibrated to 94% flow with cube wall test)
4) 6mm brim
end of EDIT
The idea was to get as good quality of surface as possible and keep the aerofoil stiffness. Needs 2 carbon fibre 6x1 mm spars with your favourite adhesive ;)
I have uploaded only 50 mm span blade but you can extend it in your slicer to any dimension your printer accepts.
Hole in the leading edge is for balancing with 2 mm dia. wire (I am using spokes as cheap and accessible in any bicycle shop)
Shimming controlled with two caps (per blade), uploaded caps with 0, -1, -1.5 and -2 deg of shimming. Can upload different angles, just let me know in comments
Printing with PLA (205/ 55) at 0.2 layer (0.4 mm nozzle) and 25 mm/s takes 3,5 h/ 200mm span
Weight is around 14g/100 mm,
use at least 6mm brim!