Product overview
The Gemfan D51 2020 Ducted PC 4 Blade, also designated D51 (2020-4), is a propulsion component for 2-inch cinewhoop quadcopters intended for indoor cinematic flying. Its four blades use polycarbonate (PC), with blade geometry designed to reduce flight noise. The design also targets smoother airflow and higher efficiency. Its stated lift application includes carrying action cameras on cinewhoop platforms, while the recommended motor range is 1103–1105.
The propeller has a 50.3 mm disk diameter and a 2 inch pitch. Its central section measures 4.5 mm thick, with a center-hole inner diameter of 1.5 mm. Maximum propeller width is specified as 0.6 mm, and weight is 0.91 g. This D51 configuration is a four-blade PC propeller component for a cinewhoop build; the product identity and dimensions describe the propeller rather than a complete flight platform or an airframe kit.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer and model | Gemfan D51 2020 Ducted PC 4 Blade (D51 2020-4) |
| Type | 2020 |
| Blades | 4 |
| Material | Polycarbonate (PC) |
| Pitch | 2 inch |
| Prop disk diameter | 50.3 mm |
| Center thickness | 4.5 mm |
| Center hole inner diameter | 1.5 mm |
| Maximum propeller width | 0.6 mm |
| Weight | 0.91 g |
| Recommended motor | 1103–1105 |
| Intended application | Indoor cinematic flying.2-inch cinewhoop quadcopters. |
| Noise design | Blade geometry designed for quieter flight.Indoor flights. |
| Lift application | Lift for action-camera carriage.Cinewhoop platforms carrying action cameras. |
