The AP421CTF-WWR66U is a two blade propeller for use on small direct drive engines. Its configuration is clockwise/tractor with the addition of a feathering facility.
The performance gain from the AP4x constant speed hub, combined with the outstanding design of the Whirlwind U series blade, allows this propeller to perform over a very wide range of speeds. As such it is an extremely popular model, finding application on a wide range of aircraft.
Precision Hub Mechanism
At the heart of each Airmaster propeller is a high quality hub mechanism. The single piece hub shell and steel retention parts ensure the hub is lightweight and strong. The high quality aerospace materials used throught the hub ensure a long life with superior fatigue resistance.
Simple Operation
The Airmaster propeller is extremely simple to operate thanks to the AC200 control system. The automatic management of the engine rpm is essential in reducing pilot worklaod during the critical phases of flight like landing and taking off.
High Aerodynamic Performance
Airmaster Propellers offer exceptional performance and durability with a wide range of blade options. The high temperature cure prepreg carbon technology ensures an exceptionally stiff, lightweight blade. This increased strength allows thinner sections and more complex shapes to be formed resulting in highier efficiencies, over a wider speed range.
The WWR66U blade from Whirlwind (USA) offers many features useful to modern Rotax powerered aircraft.
Easy installation
The installation of the propeller is very straight forward and is designed to be accomplished in a short time by any competent layperson. Included is a very comprehensive operators manual and propeller log book. The propeller comes pre-lubricated and statically balanced with all the necessary hardware supplied.
