Drone Propeller Pitch Speed Calculator

Pitch measures how much air the propeller moves - the theoretical distance forward in one complete (non-slip) revolution. Lower pitch, like 4 or 4.5, moves less air, increases power at slower airspeed, generates more thrust. Higher pitch, like 6 or 7, requires more power - motor works harder. Drones commonly use 4-6 inch pitch, racers use 4-5, camera drones use 4-4.5 for efficiency.

Small props (5-6 inch) = typical 250-500-size drones. Use pitch around 4.5 for camera (more efficiency), 5+ for aggressive freestyle. Large props (7-10 inch) on larger drones need lower KV motors with more torque. Pitch interacts with motor - high pitch requires lower KV motor or motor works hard, stalls. Test props on bench with current monitoring (keep below 80% of motor max), adjust for flight characteristics.

Real drone speed is below theoretical due to slip - props never move perfect "column" air. Expect 60-75% of theoretical in hover/unsteady-flight. Maximum speed at full throttle in forward flight around 85-90%. Heavy payloads or climb reduce speed more than level flight. Use pitch/size calculator results as upper bound, measure actual speed as lower bound - tune for best efficiency, your typical load.

Safe minimum is 2:1 (double weight), meaning 1000g drone needs at least 2000g thrust. 3:1 is better for aggressive flying, 4:1 for acrobatic or high-wind use. Less than 2:1 makes flying difficult, dangerous. Sum four motor thrusts for total (account for 80% rule in calculations - motors rarely make full claimed thrust).