Wind-Up Propeller Mechanism (Exploded)

Create a REAL, fully functional, parametric wind-up propeller mechanism for FDM 3D printing. This is a mechanical assembly, NOT a decorative model. OUTPUT: editable STEP/STP CAD assembly with separate solid components, suitable for Fusion 360 on MacBook. SPRING-FIRST DESIGN: Use a commercially available METAL flat clock mainspring, NOT a printed spring. Target the common small-spring family: approximately 14–15 mm wide, 0.28–0.30 mm thick, 28–35 mm long; use 15 × 0.30 × 30 mm as the nominal reference but make the spring interface adjustable to nearby sizes. Design EVERYTHING around the spring rather than choosing the housing first. Create an enclosed replaceable spring barrel, arbor, winding key and winding stop. The spring must mechanically drive a real 3–4 stage involute spur-gear train with compatible module, 20° pressure angle, correct centre distances and FDM backlash. Gear ratio must prioritise approximately 7–10 seconds of propeller operation over maximum RPM. Power path: winding key → metal mainspring → gears → output shaft → 4-blade propeller. Create separate gears, shafts, bushings, retainers and a 45–50 mm lightweight propeller with a positive keyed/D/hex shaft connection. Everything except the metal spring must be FDM printable. Use approximately 0.25–0.35 mm moving clearance and 0.30–0.40 mm rotating-shaft clearance. Avoid fused moving parts, impossible overhangs and inaccessible components. Make a compact serviceable housing around the completed mechanism, preferably about 80–100 mm long and 50–65 mm diameter, but change dimensions if required for correct spring/gear geometry. Provide an exploded assembly. Check gear meshing, shaft alignment, spring clearance, interference and assembly order. Do not claim physical testing. Mechanical function is more important than appearance.

Parameters

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.