Propeller set for multicopter GRAUPNER 2946.8x4.5 — 2-blade, 8 x 4.5 inch

Two-blade propeller set by GRAUPNER, model 2946.8x4.5 is designed for use on multicopter platforms that require 8 x 4.5 inch (diameter x pitch) propellers. The set includes multiple identical two-blade propellers produced to provide balanced thrust and consistent aerodynamic performance for multirotor aircraft. These propellers are intended as direct replacements or upgrades when matching motor and airframe specifications call for an 8x4.5 configuration.

Advantages

The propellers offer a simple two-blade design that provides predictable thrust and efficient rotation suitable for a range of multicopter setups. Manufactured by GRAUPNER to consistent dimensional tolerances, the set contributes to stable flight behaviour and reduced vibration when installed in matched motor and frame combinations. Their standard 8 x 4.5 dimensions make them compatible with many hobby and professional multirotor builds where this size is specified.

Suitable for

• Replacement of worn or damaged 8 x 4.5 inch two-blade propellers on multicopters
• Upgrading to a matched propeller set for motors and ESCs tuned for 8x4.5 performance
• Flight testing and tuning of thrust, efficiency, and vibration characteristics on small to medium multirotors
• Use in balanced propeller sets to maintain stable hover and responsive control

Key specifications

• Configuration: two-blade propeller
• Diameter: 8 inches
• Pitch: 4.5 inches
• Quantity: multiple identical propellers included in the set
• Compatibility: designed for multirotor applications requiring 8 x 4.5 props

How to use

Select the appropriate propeller orientation (clockwise or counterclockwise) for each motor on the multicopter and mount each propeller securely to the motor shaft following the motor and airframe manufacturer's torque and washer/lock recommendations. Ensure correct thread direction and use the recommended prop nut or adapter; tighten to the specified torque but avoid over-tightening. After installation, perform a static spin test at low throttle to verify clearance, absence of rubbing, and correct rotation direction before flight. Check propellers routinely for cracks, chips, or deformation and replace any damaged units.

Usage recommendations

For best results pair the propeller set with motors and ESC settings that match an 8 x 4.5 performance profile, balance each propeller prior to installation, and follow manufacturer guidelines for mounting torque and safety checks. Replace propellers showing any sign of damage to maintain safe flight characteristics.