Cost-Effective Quadplane:

A comprehensive testing platform

Mini Millie

The Mission.

Developed for the McGill Robotics drone team, this cost-effective and repairable Quadplane enables student teams and resource-limited labs to safely develop and test VTOL transition controllers, while avoiding the risk of damaging valuable aircraft during early-stage experiments.

<48hr

Build from Scratch

15

Mechanical fuses

8

Crashes - 0 damage

The Project at a Glance

Crash-Resilient

  • Sacrificial components absorb 125N+ impacts

  • 8 uncontrolled crashes, 0 damaged electronics

Rapid-Repair

  • Tool-free 3D-printed snap fits for field maintenance

  • Magnet-secured wingbox detaches under overload (>100N)

  • Standardized repair benchmarks: 10–30 min per failure mode

Transititon-Test Focus

  • Inverted pusher motor minimizes airflow disruption

  • PX4 telemetry logs spike events for software tuning

  • Yaw stability data informs flight controller limits

Weight-Optimized Structures

  • NACA 7415 wings with dual-spar drill-tip

  • 3D-printed PETG fuselage with internal lattice bracing

  • XPS foam core wings

Safety Integration

  • Wingtip-embedded anti-collision lights

  • Galvanic-isolated nylon inserts in booms

  • Triple-constraint vibration-resistant mounts

Academic Accessibility

  • $1100 total build cost

  • Open-source flight controller templates

  • Designed for 50+ crash/repair cycles

3rd Place at Engine Entrepreneurship Competition

  • Test

  • Validate

  • Learn

Performance Metrics

Design Specifications

  • MTOW: 12kg

  • Cruise Speed: 25 m/s

  • Total Cost: $1,100 CAD

  • Autonomy: 15 mins

  • Airfoil: NACA 7415

Turnaround Times

  • From Scratch: 48 hours

  • Wing Fracture: 20 mins

  • Sacrificial Part Failure: 10-30 mins

  • Aerostructure replacement: 20 mins

Meet the Team