Build a drone: landing gear

Each leg is made once, along the x axis, and around repeats it as many times as legs says.

1. A leg is a carbon tube bent twice on its way down: a polyline whose corners are filleted, with a circle swept along it, and a flange and a boss that pass through the leg opening. around repeats it once per leg.

   • Make the function leg:
     • set bent to fillet 3d wire(shape polyline wire([point xyz(52, 0, 0), point xyz(58, -18, 0), point xyz(78, -34, 0), point xyz(78, -48, 0)]), radius list [12, 6], indexes [0, 1], direction vector xyz(0, 0, 1))
     • set tube to pipe wire cylindrical(shape bent, radius 4, make solid true, trihedron enum isConstantNormal, force approx c1 false)
     • return union(shapes [tube, box(width 20, length 12, height 3, center point xyz(52, -1.5, 0)), cylinder(radius 5.5, height 6.4, center point xyz(52, -3, 0), direction vector xyz(0, 1, 0))], keep edges false)
   • Add a stack under the others:
     • draw any async no return(entity around(leg(), legs), options carbon)
   • Run it with Run The Code.
   

2. At the end of each leg a damper, its aluminium body revolved from a profile of twelve points by the revolved function the motor uses, and a steel spring, a pipe swept along a helix.

   • Make the function damper:
     • set profile to [point xyz(0, 0, 0), point xyz(6.5, 0, 0), point xyz(6.5, -4, 0), point xyz(5.5, -4.5, 0), point xyz(5.5, -14, 0), point xyz(6.2, -14, 0), point xyz(6.2, -16.5, 0), point xyz(4, -16.5, 0), point xyz(4, -18, 0), point xyz(2.2, -18, 0), point xyz(2.2, -30, 0), point xyz(0, -30, 0)]
     • return translate(shape revolved(profile), translation vector xyz(78, -46, 0))
   • Make the function spring:
     • return pipe wire cylindrical(shape create helix wire(radius 4.2, pitch 2.8, height 12.5, center point xyz(78, -75.8, 0), direction vector xyz(0, 1, 0), clockwise false, tolerance 0.0001), radius 0.9, make solid true, trihedron enum isCorrectedFrenet, force approx c1 false)
   • Snap under the block draw any async no return(entity around(leg(), legs), options carbon):
     • draw any async no return(entity around(damper(), legs), options aluminium)
     • draw any async no return(entity around(spring(), legs), options steel)
   • Run it with Run The Code.
   

3. A rubber foot is lofted through five circles, and two M3 bolts fix each leg's flange to the plate.

   • Make the function foot:
     • set rings to empty list
     • for each item ring in [[0, 3.2], [-2, 7], [-5, 9.5], [-8, 9], [-10, 7]]:
       • set rings to add item(list rings, item circle wire(radius get item(list ring, index 1, clone false), center point xyz(78, (-76 + get item(list ring, index 0, clone false)), 0), direction vector xyz(0, 1, 0)), clone false)
     • return loft(shapes rings, make solid true)
   • Make the function leg bolts:
     • set bolt to m3 bolt(8)
     • return make compound([translate(shape bolt, translation vector xyz(44.5, -3, 0)), translate(shape bolt, translation vector xyz(59.5, -3, 0))])
   • Snap under the block draw any async no return(entity around(spring(), legs), options steel):
     • draw any async no return(entity around(foot(), legs), options rubber)
     • draw any async no return(entity around(leg bolts(), legs), options steel)
   • Run it with Run The Code.
   

Next: payload and sizes.