Gemfan F1051 2-Blade Folding Propellers Pair (CW + CCW)

The Gemfan F1051 2-Blade Folding Propellers Pair (CW + CCW) is an elite high-efficiency propulsion solution precision-engineered for 10-inch long-range exploration drones, commercial mapping UAVs, and heavy-lift cinelifters. Combining glass-fiber reinforced composite airfoils with CNC machined aircraft-grade aluminum folding hubs, the F1051 series provides remarkable aerodynamic thrust, whisper-quiet cruise efficiency, and unmatched field portability.

Key Features & Engineering Highlights

• Centrifugal Auto-Deployment Airfoil: The innovative folding mechanism allows the blades to pivot smoothly during transport, shrinking the overall drone footprint by over 60% so full-size 10-inch quadcopters fit into standard camera backpacks. Upon motor spin-up, centrifugal force automatically locks the blades into optimal aerodynamic alignment.
• Glass-Fiber Reinforced Composite: Manufactured from an advanced glass-fiber and nylon matrix that maintains extreme torsional rigidity under heavy throttle punches, eliminating blade flutter and maximizing flight controller PID stability.
• Precision CNC Machined Aluminum Hubs: Each central hub is CNC milled from high-tensile aircraft aluminum, providing flawless dynamic balance, zero hub slop, and rock-solid concentricity on standard 5mm (M5) motor shafts.
• Motor Shaft & Drone Arm Protection: During rough belly landings or unexpected ground contact, the blades fold rearward on impact, dissipating kinetic energy and dramatically reducing the incidence of bent motor shafts or stripped motor bells.
• Optimized High-Lift Aerodynamics: Tuned with an aggressive 5.1-inch pitch curvature that delivers tremendous low-RPM thrust while conserving battery draw during long-endurance autonomous cruising.

Technical Specifications

Specification Parameter	Details
Manufacturer / Brand	Gemfan Hobby
Model / Series	Gemfan F1051 Folding Propeller Set
Manufacturer Part Number (MPN)	F1051-2B
Propeller Diameter	10.5 inches (266.7 mm)
Blade Pitch	5.1 inches
Blade Configuration	2-Blade (Folding Blade Geometry)
Blade Material	Glass-Fiber Reinforced Polycarbonate / Nylon
Hub Material	CNC Machined Anodized Aircraft Aluminum
Center Shaft Mounting Hole	5mm (Standard M5 Threaded Motor Shaft)
Single Propeller Assembly Weight	18.2g (Blades + CNC Hub)
Rotation Directions	1× CW (Clockwise) + 1× CCW (Counter-Clockwise)
Recommended Brushless Motors	2807, 2808, 2812, 3110, 3214 Stator Classes
Recommended Motor KV Rating	800KV – 1300KV (4S – 6S LiPo)
Country of Origin	China

Practical Application & Drone Setup Guidelines

• Cinelifters & Heavy-Lift Platforms: Perfect for dual-operator cinema drones carrying RED Komodo, BMPCC 4K/6K, or Sony FX6 payloads where stable low-vibration footage is mandatory.
• Long-Range Mountain Surfing & UAV Patrol: Provides high glide-ratio aerodynamic efficiency, extending flight times by up to 15% compared to standard rigid propellers.
• Zero Blade Slop Calibration: When assembling, ensure pivot screws are adjusted so blades pivot smoothly without vertical play. Dynamic factory balancing minimizes gyro noise to your flight controller.

Installation & Safe Deployment Guide

1. Verify motor direction: Ensure CW propeller assembly is installed on clockwise rotating motors and CCW assembly on counter-clockwise rotating motors.
2. Inspect pivot screws: Blades should swing freely under gentle hand pressure but have no vertical play within the aluminum hub slot. Apply a drop of medium threadlocker (blue Loctite) to the pivot screws if serviced.
3. Slide the central 5mm hub bore over the motor shaft and tighten securely using an M5 nylon-insert locknut.
4. Before arming, pull the blades outwards into an approximate 180° straight line. Upon arming, centrifugal force will automatically align the blades to perfect balance.
5. Perform an initial low-RPM ground test to confirm smooth rotation and zero unusual resonance before takeoff.

Package Contents:

• 1 × Gemfan F1051 Clockwise (CW) Folding Propeller Assembly (Blades + CNC Hub)
• 1 × Gemfan F1051 Counter-Clockwise (CCW) Folding Propeller Assembly (Blades + CNC Hub)
• 1 × Precision Pivot Hardware Set with Mounting Screws