This document describes the Knemeyer Dreieckrechner, its continuing development from 1936 until well after WWII, the versions in which it was produced both in Germany and elsewhere, and shows how it was used for the most important air navigation tasks.

The document is very much a living document, any additions are welcome via e-mail to Ronald van Riet. The document will be updated at irregular intervals as and when new information will become available.

The current version is dated August 2009.
Ronald van Riet,
Oct 8, 2009, 1:16 AM