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ESPROP

ESPROP was developed to fit the requirements of a propeller manufacturer using third party blades in custom constant speed hubs. The problem was to select the optimum blade for a particular airframe and engine, operating points, and so on. The system consists of two components:

  • ESPARA: a subroutine within XROTOR that sets up parameters and gathers and saves parametric data for multiple propellers.
  • ESPROP: a standalone utility that reads the resulting data file and presents the data in a variety of ways.

    • The system has two chief applications:
    1. The propeller designer seeking to directly compare competing designs over a wide range of operating conditions.
    2. The propeller manufacturer (or buyer) seeking to select the optimum existing blade for a specific application.

    ESPROP databases can be built from any blade geometry that has been loaded into XROTOR, over any range of operating parameters for which XROTOR will converge solutions.

    Download ESPROP v0.7

    Available under the terms of the General Public Licence. By downloading the software you agree to abide by the GPL conditions.

    Esprop07.zip includes sources, plot library, sample database, and documentation. Requires Unix/Linux/OSX with X11 support and C and Fortran compilers. (A gfortran binary with installer for Mac OSX can be downloaded here.)

    Download Esprop07.zip (<1MB)

    Documentation (text format, included in package)
    ESPROP User Guide
    Warp10 Database Notes
    ESPARA User Guide

    ESPARA cannot be freely distributed since it requires modifications to XROTOR which is a commercial code. Contact me if you wish to build a database.

    7 May 2009

    ESPROP Plot Preview

    In addition to comprehensive and flexible numerical reporting, ESPROP offers the following 8 plot types, presenting data on up to 8 propellers per plot over any range of operating points within the bounds of the database, in interactive or batch mode.

    Efficiency vs. Velocity Thrust vs. Velocity

    Efficiency vs. Power Thrust vs. Power

    Efficiency vs. RPM Thrust vs. RPM

    Efficiency vs. Altitude Thrust vs. Altitude

    © Copyright 1992-2009 Philip Carter