This is one R/C Airplane 12x4 APC Sport Composite Propeller
by Landing Products.
APC props are manufactured using a pultrusion process. This method
causes the fiberglass "fibers" to be oriented axially in 1/2" long
pellets, allowing for a higher fiber (60%) to resin (nylon binder)
density. Providing substantially higher strength and stiffness than
glass filled nylon.
The additional stiffness is beneficial to control of vibration
The higher strength allows the use of thinner cross-sections,
beneficial to weight and aerodynamic efficiency.
Dark gray composite material.
One APC Sport Propeller
ALL props require balancing.
May need prop reamer
Prop Diameter: 12"
Prop Pitch: 4
Hub Thickness: 0.60"
Hub Diameter: 1"
Engine Shaft Diameter: 5/16"