POWER & MOTOR CONTROL → SPEED CONTROLLERS. Variants are selected inside one fixed-dimension part.
| Model | PCB/body X × Y, mm | Scope |
|---|---|---|
| SpeedyBee BLS 35A Mini V2 | 30 × 35 | Page 2 drawing: 30 × 35 mm and Ø3.6 mm; specification table conflicts (35 × 35, Ø3.5). Drawing used. Bare four-in-one ESC. External capacitor, wires, dampers and FC excluded. Height is supplier envelope; undimensioned components are illustrative. |
| SpeedyBee BLS 55A — V4 stack ESC | 44 × 45.6 | Bare four-in-one ESC. External capacitor, wires, dampers and FC excluded. Height is supplier envelope; undimensioned components are illustrative. |
| Hobbywing Skywalker 40A UBEC — original | 25 × 65 | Original Skywalker 40A UBEC, 65 × 25 × 12 mm body. Integrated 5 V / 3 A BEC; 55 A peak motor current. Not V2. Flexible battery, receiver and motor leads excluded. |
PCB/body dimensions are supplier values; protruding connectors are included in rendered bounds separately. Undimensioned component positions, heights, corner radii and contacts are approximate. Use the linked drawing and physical hardware to confirm mounting and connector clearance. Flexible leads, external antennas, mating plugs and accessories are excluded. The model is a mechanical packaging reference, not a PCB fabrication file or electrical pinout.
Numeric filters omit unknown dimensions and ratings. Input-current, output-current and per-motor ESC ratings are distinct. Memory/firmware-only alternatives do not generate additional models. Semtech is the radio chip supplier, not the manufacturer of every LoRa board.
Preview and FreeCAD use the same independently movable colored solids. Package-private geometry helpers keep this part independently exportable. Validate with npm run parts:check, npm run typecheck:tests, tests/electronics.test.ts and scripts/verify-electronics.ts / scripts/verify-electronics.py.