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assembly: prop

Design Notes

(None)

assembly Design File

prop/prop.scad

//######################################
// prop.scad
// (c) 2021 - Roie R. Black
//**************************************
include <MMlib/position.scad>
include <prop_pos.scad>

use <./blade/blade.scad>
use <./wire_shaft/wire_shaft.scad>
use <./spar/spar.scad>


module prop() {
  align(pos_blade1) blade();
  align(pos_blade2)  blade();
  align(pos_spar) spar();
  align(pos_wire_shaft) wire_shaft();
}

//---------------------------------------
// debug display
prop();

Component Data File(s)

prop/prop_data.scad

//#####################################
// prop-blade-data.scad
// (c) 2021 by Roie R. Black
//*************************************
include <colors.scad>
include <../constraints.scad>

// Propeller dimensions
prop_radius = max_prop_diameter/2;
prop_pitch_angle = 40;
prop_blade_offset = 0.5;

// prop spar dimensions
prop_spar_inner_radius = 1/32;
prop_spar_outer_radius = 1/64;
prop_spar_length = 4;

prop_spar_color = WOOD_Balsa;

// prop blade dimensions
prop_blade_thickness = 1/64;
prop_max_chord = 1.85;

// prop form dimensions
prop_form_radius = 2.5;
prop_form_height = prop_radius + 2;
prop_form_angle = 14;

// elliptic form data
s = prop_radius - 1;
c = 2.5;
f = 2;
s1 = 1;
s2 = s - s1;
s3 = 1;
s4 = 1;

prop_blade_color = WOOD_Balsa;

//-------------------------------------
// calculated by analysis
prop_forward_x = -1.3287;

Components

• part: blade
• part: spar
• part: wire_shaft

Component Position File

prop/prop_pos.scad

//###########################################################
// prop_pos.scad - prop positioning data
// (c) 2021 by Roie R. Black
//===========================================================
include <prop_data.scad>

pos_spar = [0,0,0,0,0,0];

pos_blade1 = [0,0,prop_blade_offset,0,0,prop_pitch_angle];
pos_blade2 = [0,0,-prop_blade_offset,180,0,-prop_pitch_angle];

pos_wire_shaft = [-1/64,0,0,0,0,0];