Gemfan D51 Ducted 4-Blade 51mm CineWhoop Propeller (Set of 8 — 4CW+4CCW)

The Gemfan D51 4-blade propeller is engineered specifically for 2-inch (51mm) ducted cinewhoops and micro FPV drones. Constructed from durable polycarbonate (PC), these props deliver efficient thrust, quiet flight characteristics, and precise throttle control when navigating tight indoor spaces or flying close to subjects.

Key features

• Optimised 4-blade geometry designed to maximise airflow inside 51mm ducts while reducing blade-tip turbulence and acoustic noise.
• Lightweight polycarbonate construction (~0.99g per prop) providing high impact resistance against rigid duct walls during minor collisions.
• 1.9-inch pitch tuned for smooth low-end torque and steady hovering stability on heavier micro camera platforms.
• Compatible with 1103 to 1204 brushless motors using a standard 1.5mm T-mount shaft pattern.
• Supplied as a complete set of 8 propellers (4 clockwise and 4 counter-clockwise) in a clear-grey colourway.

Specifications

• Propeller Diameter: 51mm (2 inch)
• Pitch: 1.9 inch
• Blades: 4
• Material: Polycarbonate (PC)
• Weight: 0.99g per prop
• Hub Mounting: 1.5mm / T-Mount (3-Hole)
• Recommended Motors: 1103 to 1204 brushless motors
• Colour: Clear-Grey

Ideal for custom 2-inch ducted builds and cinewhoop frame replacements where tight tip clearance is essential for maximum thrust efficiency. Before installing, confirm your motor bells feature a 1.5mm shaft or standard micro T-mount screw pattern.