4QD - DC Motor Control

Miniature Railways

Some other pages on site, of interest to loco builders:


Our controllers are used world wide by model makers and miniature railways, both private and commercial. This page is dedicated to some of the suppliers and owners.

We get sent a lot of pictures of locos that have been made using our controllers: our photo gallery includes offerings from England, Canada, Czech Republic, Germany, Italy, Japan, New Zealand, Switzerland, USA. But most of the pics are not good enough to scan in for this site.

If you have a picture of a loco using a 4QD controllers that you would like us to add, please contact us first! Please do not sent photos before contacting us as our email server rejects large attachments.

So this is the start of the www picture gallery and railway list. Against some there's a description and a thumbnail or four. Click on the thumbnail if you want the full picture or the link to go to their www site.


Some of these are internal links to pages on this site (these are marked arrow/png), some are external. This list is a very smalll sample: many loco builders buy our controllers via distributors and most don't tell us what they do!

Dan Jeavons

is very well known to the U.K. loco fraternity. However he has no www site.
Mr D Jeavons
59 The Foxholes
DY10 2QR

Phone and Fax: 01562 754 530

Maxitrak Ltd

For many years, Maxitrak have been using 4QD controllers: they make many different machines and 4QD do not have details of the wiring - which differs from machine to machine. You should therefore contact Maxitrak direct for queries about specific loco model.

Our hand control box and relay board were however inspired by the wiring of a Maxitrak loco and were designed to simplify the wiring and remove some of the problems caused by their somewhat over-complicated wiring!

Niizaki Model Engineering

is run by Yoichi Niizaki who manufactures locos. He also distributes 4QD controllers in Japan. He has no www site.
Yoichi Niizaki
Niizaki Model Engineering
2-24-19 Denenchofu
145 0071

Phone and Fax: 0081 3 3721 0488

Alaska Live Steamers

From David F Borough of Alaska Live Steamers, Wasilla, Alaska. 28 February 1999.
The main picture is a JPEG, 179K.

pics/BoroughDavid says: "The locomotive is a model of the prototype at Sacramento California (USA) Railroad Museum. The loco is 1.6 scale 7.5" Gauge. Uses two traction motors mounted to each axle with 64:11 gear drive reduction. The motors are from a disabled three wheel cart, 24 vdc pm motors. The motors are hooked in parallel to the controller - 4QD's NCC-70-24 (now redesigned as the DNO). The power source is two 12v deep cycle RV batteries hooked in series. The loco will run for about 16 hours between charging. It is very powerful can pull a train of 6 cars with 3 adults up a 2% grade with power to spare. To add realism a sound card is used for locomotive engine, bell & whistle sounds. The sound is so real it has fooled many to believe the real thing is coming up the tracks."

Carr's Machining Ltd.

Carr's not only make some fantastic locos, but they also distribute our controllers in Canada. See their www Site or email Shane Carr for more information.

AC4400 CPDT2 Dash8-2 M420
AC4400.jpeg (107KB) CPDT2.jpeg (117KB) Dash8-2.jpeg (96KB) M420.jpeg (125KB)
Click on the thumbnail to download the full JPEG image

J-M Mairesse

Mr. Mairesse tram (to quote Mr Mairesse) is a model of the engine which ran on the tracks of the Belgian Vicinal between 1935 and 1955. It was called "type standard". This tram is 1/5 scale on 7 1/4" gauge.

After modification, it uses one bogie of 1HP and one bogie of 1/2 HP, with the use of 6 motors of 1/4 HP, 12 V DC. The motors work on 24 V DC, hooked in series two by two, and hooked all together in parallel to the controller: 4QD-150-24. The power source is a series of 12 V batteries.

In normal use at our association, on a public park, the tram can run 32 km with coaches for +- 10 children.

At home in the garden, because of gradients of the tracks round about 3%, a booster is joined to the tram, with two motors for a total of 1/2 HP. These motors are hooked in parallel with the motors of the tram.

The controller has thus two ranges of use: 1,5 HP or 2 HP.

tram_1.jpeg (148KB)tram_2.jpeg (169KB)tram_3.jpeg (201KB)
Click on the thumbnail to download the full JPEG image

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Last modified: Fri, 27 Mar 2015 18:50:10 GMT
© 1999-2016 4QD/4QD Ltd.
Page's Author: Richard Torrens