Gears and transmission
WLtoys 144001 Chassis Base Plate
- Bounding box
- 229.3 × 88 × 9.2 mm
- Engine
- 3D Printing B-rep
- Parameters
- 19
- Published
- November 9, 2026
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The prompt
// ======================================================== // WLtoys 144001 Replacement Base Plate (Parametric) // ======================================================== $fn = 40; // Smooth curves // Overall Dimensions length_flat = 205; // Flat rear section (mm) length_nose = 28; // Front kick-up nose section (mm) width_max = 88; // Overall chassis width (mm) thickness = 3.0; // Main plate thickness (mm) kickup_angle= 12; // Front nose angle (degrees) // Hole Spacing Definitions diff_mount_x = 32; // Front/Rear gearbox hole pattern X diff_mount_y = 24; // Front/Rear gearbox hole pattern Y m3_countersink_d = 6.0; // Countersink diameter m3_hole_d = 3.2; // M3 screw pass-through diameter module countersink_hole(x, y) { translate([x, y, -0.1]) { // Screw pass-through cylinder(h = thickness + 2, d = m3_hole_d); // Underneath countersink (flush bottom) cylinder(h = 1.8, d1 = m3_countersink_d, d2 = m3_hole_d); } } module base_plate_2d() { hull() { // Rear profile taper translate([-length_flat/2, 0]) square([20, width_max - 20], center=true); // Center main section square([length_flat - 40, width_max], center=true); // Front nose taper translate([length_flat/2, 0]) square([20, width_max - 15], center=true); } } module full_chassis() { difference() { union() { // Main flat chassis section linear_extrude(height = thickness) base_plate_2d(); // Front 12-degree angled nose section translate([length_flat/2 - 2, 0, 0]) rotate([0, -kickup_angle, 0]) linear_extrude(height = thickness) square([length_nose, width_max - 15], center=false); // Top-side longitudinal reinforcement ribs (for 3D print rigidity) translate([0, 18, thickness]) cube([length_flat - 20, 2.5, 2.0], center=true); translate([0, -18, thickness]) cube([length_flat - 20, 2.5, 2.0], center=true); } // --- COUNTERSINK MOUNTING HOLES --- // Front Bulkhead / Differential Mounts countersink_hole(length_flat/2 - 15, diff_mount_y/2); countersink_hole(length_flat/2 - 15, -diff_mount_y/2); countersink_hole(length_flat/2 - 15 - diff_mount_x, diff_mount_y/2); countersink_hole(length_flat/2 - 15 - diff_mount_x, -diff_mount_y/2); // Rear Bulkhead / Differential Mounts countersink_hole(-length_flat/2 + 15, diff_mount_y/2); countersink_hole(-length_flat/2 + 15, -diff_mount_y/2); countersink_hole(-length_flat/2 + 15 + diff_mount_x, diff_mount_y/2); countersink_hole(-length_flat/2 + 15 + diff_mount_x, -diff_mount_y/2); // Center Steering Bellcrank Mounts countersink_hole(35, 16); countersink_hole(35, -16); } } full_chassis();
Parameters
| Name | Value | Range |
|---|---|---|
| Flat plate length | 200 mm | 120 – 300 |
| Width at rear | 88 mm | 40 – 150 |
| Width at nose crease | 76 mm | 30 – 150 |
| Width at nose tip | 58 mm | 20 – 140 |
| Plate thickness | 3 mm | 1.5 – 6 |
| Plan-view corner radius | 8 mm | 2 – 20 |
| Nose length | 30 mm | 1 – 60 |
| Kick-up angle (deg, 0 = flat plate) | 12 mm | 0 – 30 |
| Overlap into the flat plate | 3 mm | 1 – 8 |
| M3 clearance hole | 3.4 mm | 2 – 8 |
| Countersink head diameter | 6.4 mm | 3 – 12 |
| Hole pattern inset from ends | 15 mm | 5 – 40 |
| Hole pattern X spacing | 32 mm | 10 – 80 |
| Hole pattern Y spacing | 24 mm | 6 – 80 |
| Bellcrank hole X position | 35 mm | 0 – 90 |
| Bellcrank hole Y offset | 16 mm | 4 – 40 |
| Rib height above plate | 2 mm | 0.4 – 6 |
| Rib width | 2.5 mm | 1 – 8 |
| Rib offset from centreline | 24 mm | 0 – 60 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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