Practical, physics-backed notes on designing drones and UAVs — the same methods behind the free design tool.
A simple, physics-based way to pick propeller diameter and pitch from your target speed, available thrust and motor RPM — plus the tip-speed limit to avoid.
From hover power to endurance and range: how to size a LiPo pack (capacity and weight), why flight time peaks at a certain battery mass, and the C-rating trap.
Why your propeller makes less thrust as the drone speeds up, what "pitch speed" means, and how to keep enough thrust at your cruise speed.
Where high-fidelity CFD pays off in a UAV program — drag reduction, propeller and duct flow, stability and transition — and when it's worth the cost.