Variable pitch propellers have a distinct advantage compared to fixed pitch models. This translates into a more fuel efficient, higher performing aircraft with much improved rate of climbs and shorter takeoffs for those tight places!
Airmaster Propellers, Ltd from New Zealand is a manufacturer of high quality electrical constant speed propellers with various options like feather, manual pitch control with hold and factory preset-able RPMs for takeoff, climb and cruise tailored to your aircraft and engine combination.
The factory preset RPMs by Airmaster in the AC200 controller can be reprogrammed as per your requirements.
Excerpt from the document:
This document is intended to assist the propeller operator in modifying the AC200 control box flight parameters. This is done through the use of software running on a MS Windows PC. A laptop computer is recommended, to allow it to be taken to the controller in the aircraft.
To continue reading see the pdf below: