Gears and transmission
Tilt-Rotor Quadcopter Central Frame
- Bounding box
- 200.0 × 160.0 × 16.0 mm
- Engine
- Precision B-rep
- Parameters
- 21
- Published
- October 12, 2026
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The prompt
Create only the central frame of a non-functional, display-only tilt-rotor quadcopter model, designed for separate FDM printing and tool-free assembly. Use millimeters. The printer bed is 220 × 220 mm. The central frame must fit entirely within a 200 × 160 mm footprint. Do not create arms, propellers, motor pods, tilt joints, landing gear, or the upper enclosure yet. Do not add electronics mounts, battery compartments, screw holes, bolts, nuts, or threads. Coordinate system: X is front-to-back, Y is left-to-right, and Z is upward. Center the frame at X=0, Y=0. Place its bottom at Z=0. Create the following geometry: A rounded rectangular perimeter ring, 200 mm along X and 160 mm along Y, with a ring width of 16 mm, a thickness of 6 mm, and an outer corner radius of 12 mm. A central plate, 100 × 70 mm and 6 mm thick, centered on the origin. Four arm mounting pads, each 36 mm along X and 32 mm along Y, extending from Z=0 to Z=16 mm. Place their centers at (+65,+58), (+65,-58), (-65,+58), and (-65,-58) mm. Four diagonal connecting ribs, 14 mm wide in the XY plane and 6 mm thick. Connect the central plate to the four arm mounting pads with positive solid overlap. Four landing gear socket blocks, each 18 mm along X and 22 mm along Y, extending from Z=0 to Z=14 mm. Place their centers at (+30,+69), (+30,-69), (-30,+69), and (-30,-69) mm. Fuse these blocks into the perimeter ring. Leave the spaces between the central plate, ribs, and perimeter ring open through the frame. Fuse all features into one connected solid. Keep the bottom coplanar at Z=0 and preserve symmetry about the XZ and YZ planes. Do not create any sockets yet. Do not add decorative details or edge fillets yet. Make the principal dimensions editable parameters.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall frame length (X) | 200 mm | 140 – 200 |
| Overall frame width (Y) | 160 mm | 120 – 160 |
| Perimeter ring width | 16 mm | 8 – 30 |
| Perimeter ring thickness | 6 mm | 3 – 12 |
| Outer corner radius | 12 mm | 1 – 30 |
| Central plate length (X) | 100 mm | 40 – 180 |
| Central plate width (Y) | 70 mm | 30 – 140 |
| Central plate thickness | 6 mm | 3 – 12 |
| Arm pad length (X) | 36 mm | 15 – 60 |
| Arm pad width (Y) | 32 mm | 15 – 60 |
| Arm pad height (Z) | 16 mm | 6 – 30 |
| Arm pad centre X | 65 mm | 30 – 90 |
| Arm pad centre Y | 58 mm | 25 – 75 |
| Gear block length (X) | 18 mm | 8 – 40 |
| Gear block width (Y) | 22 mm | 8 – 40 |
| Gear block height (Z) | 14 mm | 6 – 30 |
| Gear block centre X | 30 mm | 10 – 70 |
| Gear block centre Y | 69 mm | 30 – 79 |
| Rib width (XY) | 14 mm | 6 – 30 |
| Rib thickness (Z) | 6 mm | 3 – 12 |
| Rib inset into plate | 12 mm | 8 – 25 |
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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