Quadrotor Research Platform

#### Quadrotor Research Platform
This is a long endurance, high payload capacity quadrotor that's ideal for research projects. Its a simple, low cost, easy to use, and proven platform for flight experiments. Many of its non-frame parts are 3D printed, including most of the battery. It has a total cost of around $1000 (May 2026), while its no-payload hover endurance is around 1 hour. It's designed to carry a 10lbf (~4.5kg) payload at hover endurance of 35 minutes. Additionally, this can be flown in pitch-black darkness since it features both orientation lights (red on port side, green on starboard side) and position lights (two high powered LED strobe lights, one on port side and the other on starboard side); the orientation lights are always on, while the position lights can be turned on/off via transmitter switch. This system has been flight tested on a Pixhawk Cube Orange flight controller with ArduPilot 4.6.1 firmware; integration with PX4 firmware is in-progress. In summary, this