Carbon-fiber propeller blade set for multirotor UAS, supplied as dynamically balanced CW and CCW matched pairs for the KDE13218XF-105 brushless motor. Diameter is 901.7 mm, pitch is 12.1 in and each blade weighs 70 g.
The KDE-CF355-DP is a carbon fiber propeller blade set for multirotor UAS, made by KDE Direct. It belongs to the Dual-Edition series: each propeller has two blades, and the set contains one matched pair of CW blades and one matched pair of CCW blades, so a multirotor can use both rotation directions. The drawing labels the two editions CW (L) and CCW (R).
The blades are made of 3K carbon-fiber matrix, the same type of true carbon-fiber material KDE Direct supplies to its military customers. The design is optimized by finite element analysis (FEA) for maximum strength and minimum weight. All blades are dynamically balanced and delivered as matched sets, so they can be installed without secondary balancing. Blades cannot be intermixed between sets; if a single blade is damaged, the whole CW or CCW set must be replaced to keep the balance.
For the integrator, the main figures are these. The installed diameter of one propeller is 901.7 mm, which defines the clearance needed around each rotor and between neighboring rotors on the airframe. The pitch is 12.1 in. Each blade weighs 70.0 g, the figure to use for rotating-mass and balance calculations. The set contains two blades per propeller, one pair for each direction of rotation.
The blades mount on the KDE-DPAHL-SP dual-propeller blade (heavy-lift) adapter; two adapters are required for each set (CW and CCW). Each blade root has a through hole for the mounting hardware, and the manufacturer's drawing also specifies a shim. The compatible motor listed by KDE Direct is the KDE13218XF-105 brushless motor, and the blades are designed for installation on KDE Direct multirotor propeller blade adapters and UAS multirotor brushless motors.
KDE Direct does not release CAD models for its propellers because of the proprietary airfoil design. It provides a design geometry dimensions specification sheet, a design presentation, an adapter installation diagram and performance data for the series. KDE Direct does not state any aviation or regulatory certifications for this blade set, so compliance documentation should be requested from the manufacturer where a program requires it.
The blades are offered for commercial and industrial multirotor UAS applications, with the same carbon-fiber construction used for military customers. They suit heavy-lift multirotor builds that need matched, pre-balanced propellers for smooth, vibration-free operation.
CW (L) and CCW (R) editions; set includes one CW matched pair and one CCW matched pair[1][2][3]
Hub / mount
7.5 mm through hole with 7.5 mm x 6.00 mm shim; mounts on KDE-DPAHL-SP dual-propeller blade (heavy-lift) adapter (two adapters per set); compatible motor KDE13218XF-105[1][2][3]
Balance grade
Dynamically balanced, matched sets (no balance grade stated)[1][2][3]
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