APC MultiRotor 9X4.5 2 Blade 4 Pack with Adapter Rings
by APC

APC MultiRotor 9X4.5 2-Blade Propeller 4-Pack (with Adapter Rings)

The APC MultiRotor 9X4.5 is a professional-grade propulsion solution engineered specifically for multi-rotor applications, including tactical sUAS, industrial heavy-lift drones, and advanced photography platforms. Unlike standard electric propellers, the MultiRotor series is designed with a thinner profile and a larger hub, optimizing the airframe for maximum hovering efficiency and low current draw. This efficiency translates directly into extended flight times, making these propellers a staple for government contractors and sUAS manufacturers who require reliable, long-endurance performance in the field.

Constructed from high-quality Glass Fiber Reinforced Composite (GFRC), these propellers offer a superior stiffness-to-weight ratio compared to traditional plastic rotors. This rigidity ensures that the blade maintains its aerodynamic profile even under high torque, providing the crisp throttle response and yaw stability necessary for precision maneuvers and stable sensor payloads. The included precision adapter rings allow for a perfect fit on a wide variety of motor shaft diameters, ensuring that the propulsion system remains balanced and vibration-free—a critical requirement for high-fidelity aerial data collection and university-level aerospace research.

Technical Specifications

• Model: APC09045MRB4 (LP09045MR-B4)

• Diameter: 9.0 inches

• Pitch: 4.5 inches

• Blade Count: 2-Blade

• Material: Glass Fiber Reinforced Composite (GFRC)

• Rotation: 2x Standard (CW) and 2x Reverse (Pusher/CCW)

• Maximum RPM: 11,667 RPM (Formula: 105,000 / diameter)

• Weight: ~0.39 oz (11.06g) per propeller

• Hub Diameter: 0.65 inches

• Hub Thickness: 0.34 inches

• Shaft Diameter: 1/4 inch (compatible with included rings)

• Color: Industrial Grey

What is Included

• 2x APC 9x4.5MR MultiRotor Propellers (Standard Rotation)

• 2x APC 9x4.5MRP MultiRotor Propellers (Reverse Rotation)

• 4x Sets of LPAR06E Precision Adapter Rings (1/8", 4mm, 5mm, 6mm, 5/16")