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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, engine and operating points. The system consists of two components:

  • ESPARA: a subroutine within CROTOR 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

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

    Esprop08.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.) Can be built on Windows but this has not been tested.

    Note that ESPROP 0.8 is included in the CROTOR 755-ES1 build. This distribution is intended for those not needing CROTOR who wish to view ESPROP databases generated by others.

    Download Esprop08.zip (<1MB)

    Documentation (text format, included in package)
    ESPROP User Guide
    Warp10b Database Notes

    Versions

    21 October 2011

    ESPROP 0.8
    Minor tweaks, compatibility with ESPARA 0.8 in CROTOR 755-ES1
    Beta sample blade station now stored in database.

    7 May 2009

    Esprop 0.7

    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 1992-2011 Philip Carter