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All contents (including photos and drawings) - © 2010  Derek Mackenzie
Locos and coaches for G1

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Narrow Gauge Drawings Index

Please note that the search box will not work for some areas of this site - this is because the shear volume of data requires some pages to be loaded from files. These files appear to be immune to the search facility.

To find a particular railway - go to the Drawings Index page - select the page for railways starting with your required initial, then use your browser’s find facility to locate the name.

Orion Business Systems has been developing insurance management software since 1980.
This software was designed for the Unix operating system (the second commercial user in the UK) but was developed from the outset on personal computers (pre-IBM PC!).
It supported a pet insurance company, which grew from 5 employees to over 200 during the 21 year period of its’ use. During most of this period, Orion was either the sole or the main provider of software to this company – it was eventually phased out, after a successful Y2K conversion (it was never expected to last this long!) due to a take-over of the insurance company.
Orion has also written an Access database for a small independent tour operator. This software manages all enquiries and bookings, and is still successfully in use over 8 years later.

Orion also created this website.
Derek Mackenzie has been writing software professionally since the late 1960’s, but since 2000 has been concentrating on model engineering, producing live steam model railway locomotives in 1/32 scale (gauge 1).

An extensive (and complex) Access database has been written to manage the design and production of over 390 castings and 500 etched parts required in each locomotive. This database is also used to calculate the milling time for each master and produce a production schedule.

Techniques have been developed to improve the accuracy of the CAD/CAM machining processes used for this, and further software  developed in Visual Basic to correct feed rates when milling the  parts.
Further Access databases have been developed for a variety of purposes, including the indexing database providing the data for the NG Railways pages on the linked site.
To contact me - see the tab above or click here for details.