a slide rule
of the circle
It is the intention that the contents of this page will be focused fully on calculating instruments of Dutch origin.
A Dutch design from 2011 is
the virtual slide rule by Olaf Veenstra: YASS
= "Yet Another Slide rule Simulation".
This is a 3-D computer simulation of an existing type of slide rule, the Pickett
be executed on a PC.
On internet one can find a number of slide rule simulations; these
however work in 2 dimensions only. For example, an identical type
Pickett N909-ES, designed by Derek Ross (YAVSR
= "Yet Another Virtual Slide Rule").
The 3-dimensional Pickett slide rule by Olaf, in all details, can be
viewed from any position in space, and is actually usable for
Special properties :
|VRML (Virtual Reality Modeling Language) has been used for the
implementation. The free viewer plug-in by Bitmanagement Software
has to be installed. Off-line
viewing is possible too.|
|Apart from mouse control, some keyboard shortcuts are available for
moving or zooming of the slide rule (see picture at the left).|
|Zooming in is possible
without loss of quality. |
|The model of the N909-ES is realistic, but there is also an educational
mode in which particular scales can be hidden, or a digital read-out
is supplied. |
|The backside is likewise realistic, with the conversions between
physical units following the intuitive method of bi-directional
arrows between the units in each pair.|
|All details of installation and usage can be found on the YASS
As general introduction to the Dutch slide rule manufacturer ALRO an MIR 41 article
algemene rekenschijven van ALRO".
special medical application was the
"Klinische Rekencirkel van Dr. A. Lips", produced by ALRO.
For a description of this calculating disc (in Dutch), see
article in MIR 50 of april 2009, p. 33 - 38.
Have a look at the original manual of
the Lips Rekencirkel, in Dutch.
This calculating disc can be manipulated virtually in the
designed by Peter Bloemendaal.
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