# Folding Propeller Hinge Placement

## Introduction

The placement of a propeller folding hinge is defined by the Radial/R, Axial/R, and Offset/R parameters which adjust the location along the blade feather axis, in and out normal to the propeller disk, and “up” or “down” within the propeller disk or normal to the feather axis and thrust directions, respectively.  Each of these distances are normalized by the propeller radius so that they remain independent of alterations to the propeller size.  The Angle parameter sets the angular rotation about the propeller hinge axis.