Large-diameter, low-pitch 15x4 propeller from Master Airscrew's K Series, moulded in glass fibre reinforced composite. Designed for larger 2-stroke and 4-stroke glow engines and electric conversion models — as marked on the pack, suitable for glow and electric power.

The 15" diameter with 4" pitch favours strong static thrust and low-speed pull over top-end speed, making it a natural fit for big trainers, vintage designs, and scale models that fly on torque rather than RPM. The reinforced composite moulding gives the stiffness to hold its pitch under load with the durability expected from a workhorse glow prop.

Shaft bore is 5/16" (7.94mm) — check this against your engine's crankshaft or electric motor's prop adapter before ordering. Standard tractor rotation.

Specifications

Brand: Master Airscrew
Part number: MA.KK15x40N01
Series: K Series
Diameter: 15" (381mm)
Pitch: 4" (102mm)
Rotation: Normal/Tractor
Shaft bore: 5/16" (7.94mm)
Hub thickness: 11/16" (17.5mm)
Weight: 68g (2.4oz)
Material: Glass fibre reinforced composite
Colour: Black
Application: Glow and electric