This is the APC 9x3.8 Slow Flyer Propeller. APC propellers are manufactured using a pultrusion process which allows for a higher fiber (60%) to resin (nylon binder) density. This provides substantially higher strength and stiffness than glass-filled nylon. The additional stiffness is beneficial to control vibration resonance response. The higher strength allows the use of thinner cross-sections, beneficial to weight and aerodynamic efficiency.

Features:

• Computer-optimized design gives these props a thinner profile and more "bite" with less noise
• Lightweight molded nylon construction reduces rotating mass for higher output and longer life
• Reinforcing fibers help maintain true, constant pitch at any RPM

Specifications:

• Propeller Diameter: 9in (228.6mm)
• Pitch: 3.8in (96.52mm)
• Hub Diameter: 0.5in (12.7mm)
• Hub Thickness: 0.33in (8.382mm)
• Shaft Diameter: 0.25in (6.35mm)
• Weight: 0.32oz (9.07g)
• Rotation: CCW (Standard/Tractor)