Gemfan 2020 D51 Blades — 51mm, 4-Blade (4 pcs. set) from Gemfan are high-quality propellers designed specifically for TinyWhoop and mini-FPV quadcopters. The model has a disk diameter of 50.3 mm (2 inches), a pitch of 1.9 inches, and mounts onto a 1.5 mm diameter shaft thanks to a 1.5 mm inner bore in the center (3 holes). The 4.5 mm thick blade hub and T-mount method ensure reliable shaft fixation, while the weight of only 0.91 g per blade contributes to longer flight times and increased maneuverability of the aircraft.

Description and Purpose

The four-blade Gemfan 2020 design provides greater flight stability, reduces vibrations, and improves smoothness and precision control during intense maneuvers on compact tracks. Given their low weight and the rigidity of polycarbonate (PC), these propellers combine efficiency and durability. The absence of adapter rings means a direct fit to a 1.5 mm shaft, and the three-hole design in the central part guarantees precise and reliable mounting.

Technical Specifications:

• Material: PC (polycarbonate)
• Colors: transparent gray / whiskey / black / yellow / blue
• Adapter rings: none
• Set includes: 2 CCW and 2 CW 4-blade propellers
• Pitch: 1.9 inches
• Propeller disk diameter: 50.3 mm (2 inches)
• Hub thickness: 4.5 mm
• Inner bore diameter in center: 1.5 mm (3 holes)
• Maximum blade width: 10.6 mm
• Weight: 0.91 g (per blade)
• Recommended motor: 1103-1105
• Shaft (axle): 1.5 mm (direct fit without adapter)

Package Contents:

• 2 x CW D51 4-blade propellers, 51 mm
• 2 x CCW D51 4-blade propellers, 51 mm

Gemfan 2020 D51 propellers are recommended for installation on aircraft with an 85 mm motor base, specifically for models like BetaFPV Cetus X and Meteor 85, as well as other brushless quadcopters using 1103–1105 size motors. Thanks to their optimal pitch and blade configuration, these propellers increase engine efficiency, improve acceleration, and stability under load.

The PC material provides the product with resistance to mechanical damage and maintains aerodynamic properties during intensive use. The set of two CW and two CCW propellers ensures full replacement and balance for the quadcopter. Product category: Drones & Quadcopters > Propellers. Brand: Gemfan.

If you are looking for lightweight, agile, and reliable propellers for mini-FPV, the Gemfan 2020 D51 is an excellent choice for improving the control and stability of your drone.

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