Certified or uncertified

S is for certified propellers,  E is for uncertified propellers

Engine type

G is for geared reduction engines

D is for direct drive engines

E is for electric motors

Propeller series

Blade shank diameter

A is 1.5”,  B is 2”,  C is 2.375”,  D is 3”

Propeller pitch

L is for low pitch propeller

M is for medium pitch propeller

H is for high pitch propeller

Direction of rotation

R is clockwise direction viewed from the cockpit to the flight direction

L is counter clockwise direction viewed from the cockpit to the flight direction