This list is intended for help, discussion and announcements on the RC e-flight Drive Calculator tool (Win, Mac and Linux, English and German), developed by Christian Persson and Helmut Schenk.

Download D-Calc (English & German, software version 3.4 April 2010, motordatabase November 2011).

Compilation of other e-flight calculators.

Drive Calculator determines the approximate characteristics of an electric motor from a few measured data points and computes the operating point for the selected propeller. It is a standalone application for Window, Mac and Linux platforms and comes with a SQL database that contains separate tables for motors, batteries, ESCs, propellers, and gear boxes. Data sharing via the internet is built into the application, so that the growth of the database can easily be supported by the users.

D-Calc features a refined motor analyzer, multiple graphical views of motor data and propeller data, versatile database filters and useful tools for motor builders. The software assists in finding props that fit a selected motor, and vice versa, in finding motors that fit a selected prop. After selecting cell type and number of cells, it will calculate the pack voltage under load, the WOT flying time and the total weight of the drive train. You can have metrical units converted to imperial/English units with a right mouse-button click on the respective number.(Text by Christian Persson)

Ron van Sommeren, group 'owner'