The Shed - Model Making

It’s all a matter of scale

29 August 2023

They say variety is the spice of life. So it is in the shed. For Taranaki mechanical design engineer Michael Wolfe this means working on projects as diverse as rebuilding a high- powered 1970 American muscle car through to intricate work creating a model of a classic Swiss 1960s train.
Michael re-builds and maintains full-size classic cars and in his spare time model railway construction keeps him busy.
“The skills needed are much the same,” said Michael. “It’s really all a matter of scale.”
His hand-made creation of a replica of an iconic Swiss electric train, the RAe TEE II, is unique – probably the only one in the world.
Panel construction, lathe work, welding, woodworking, and even creating parts with a 3D printer have all been part of the job. In the world of model trains, this is a big one. Each of the six cars that make up the luxury train is about 800mm long.
Michael started off with some plans, photographs of full-size trains, and books, all of which he used to create initial drawings.

Rescue those versatile stepper motors

10 March 2023

Magnetism is wonderful stuff.
As a way of moving things it has no peer. It has no friction, excessive heat or other unwanted effects, and is easily harnessed in the shed in the guise of stepper motors. These versatile devices have an astonishing range of rotational speeds, from zero to tens of thousands of rpm.
Thanks to the precision of digital control, they can accelerate, decelerate, turn a specific number of times or even minute fractions of a single rotation – all repeatedly and reliably.

Build your own robot arm

15 November 2021

This article is all about building your own Meccano version of a robot that can be programmed to work just like the big fellas – and you can learn just how challenging real-world robots are to control. The robot arm can be programmed to move small objects from one place to another. It can reach, grab, lift and swivel.

Make a simple toy truck

28 July 2020

With toys, in particular, maintenance and reparability are important to ensure a long life. A broken plastic toy goes in the bin, whereas a well-designed wooden toy can make many trips to the repair shop over generations of play.

Building a Stirling engine

10 June 2020

I always get a thrill at seeing one of my engines running for the ﬁrst time. It was especially true for this one because I had had no previous experience in making such an engine. The engine runs at about 600 RPM with a good differential between the hot and cold ends of the displacer tube.

Build a small steam engine – part two

21 February 2019

Although daunting at ﬁrst, it is fairly logical if tackled a small step at a time. The use of a lathe is desirable but with a little lateral thinking it would be possible to make it without one.
First the cylinder is made from a short length of 12 mm round brass rod. Mount this in the three-jaw chuck of your lathe and face off one end. When turning brass it is necessary to grind the tool with a negative rake (see diagram). Brass is extremely brittle and the point of a tool bit with a positive rake would bite and snap off, being thinner and weaker.

Building a small steam engine – part one

13 February 2019

Originally devised as a plaything for young boys, they quickly became the sort of toy that a lad was only allowed to play with on special occasions. They returned for a brief period of popularity during the 1960s and 1970s but even then were more adornments for a bookcase rather than well-used toys. This was probably due to the exorbitant cost of the product rather than any regard for safety.

Instead of watching television

28 August 2017

“You must have too much time on your hands.” That’s what people often say when they see my model cars. I’m never really sure what to reply, because it’s something I do instead of watching television or building the real thing. But the question I get asked the most is how long it took to build.

Model Making

It’s all a matter of scale

Rescue those versatile stepper motors

Build your own robot arm

Make a simple toy truck

Building a Stirling engine

Build a small steam engine – part two

Building a small steam engine – part one

Instead of watching television

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