Propulsion & Power
Propulsion is where drone physics bites hardest. Motor sizing, ESC selection, battery chemistry and honest endurance math decide whether your aircraft meets its spec sheet or falls out of the sky twenty minutes early. Start here before you buy hardware.
Beyond Batteries: Hydrogen Fuel Cells and Hybrid Power for UAVs
Hydrogen fuel cells, gasoline hybrids and tethered power for long-endurance UAVs — real energy densities, system weights, logistics and when batteries still win.
Propulsion & PowerBrushless Motor Sizing for Drones: KV, Torque and Thrust-to-Weight
How to size brushless motors for a UAV: understanding KV, stator dimensions, thrust-to-weight targets, hover throttle and reading manufacturer thrust tables.
Propulsion & PowerDrone Batteries: LiPo vs Li-ion, C-Ratings and Real Energy Density
A practical UAV battery guide: LiPo vs Li-ion chemistry choice, honest C-ratings, energy density numbers, pack configuration, smart batteries and lifecycle costs.
Propulsion & PowerDrone Endurance Calculation: The Math Behind Flight Time
Calculate UAV flight time from first principles: hover power, disk loading, the battery mass spiral, optimal battery fraction and a worked multirotor example.
Propulsion & PowerESC Selection for UAVs: Current Ratings, Protocols and Telemetry
How to choose electronic speed controllers for a professional drone: real current ratings, DShot and CAN protocols, telemetry, desync causes and thermal design.
Propulsion & PowerLiPo Battery Safety: Charging, Storage and Not Burning Your Workshop Down
Practical LiPo safety for drone builders: the voltages that matter, how to charge and store packs, spotting a dying battery, and what to do when one goes wrong.