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Terry Mackenzie-hoy

Terry Mackenzie-hoy

Mackenzie-Hoy is a consulting acoustics and electrical engineer – machoy@iafrica.com

Winging it

28th April 2017 Not too long ago, I asked a young engineer to build an item of equipment. It was not very complicated; when the temperature rose above a certain level, a relay should close, which would energise a socket outlet to power a cooling device. At the same time, if the temperature fell below a certain... 

Once again, we have a nonengineer as Energy Minister

21st April 2017 In the film The Remains of the Day, Anthony Hopkins is a butler in a large country house. It is before World War II. The upper-class guests are all discussing the state of the world and of Germany. Somebody suggests that the opinion of the people should be taken into account. The common people. A... 

Statute of limitations

14th April 2017 In South Africa, for some crimes, the right to institute criminal proceedings lapses 20 years from the time the offence was committed. And so I am going to tell you about some of the things I did 20 years ago. They are not crimes, let me add – just things I did. I worked with a guy called B. He... 

Reflections on the IRP2016

7th April 2017 You probably do not know, but there has been much discussion concerning the Integrated Resource Plan of 2016 (IRP 2016). I am sure you have heard people discussing it at cocktail parties and children giving their views to one another in the playground during big break. In fact, just the other... 

Wind farms cause drought

31st March 2017 I quote from an obituary (of Nancy Wertheimer, which refers to her partner, Ed Leeper – both were American): "In 1979, Wertheimer and Leeper reported that children living near high-current electrical wiring had a higher than expected rate of leukaemia. At the time, the association was seen as a... 

Analogue versus digital

24th March 2017 Older speedometers are analogue. Clocks with hands are analogue. In fact, anything that indicates a quantity using a needle is analogue. By this we mean that the value of the quantity is indicated in some proportion to the quantity itself. The simplest example is a balance beam, which has a fixed... 

Engineers and TV

17th March 2017 Some of my relationships have failed as a result of my interaction with TV. There we are, she and I, hands entwined, hers around a bar of chocolate and mine around a glass of whiskey . . . and something on TV will be such rubbish that I will have to use a phrase like "Gosh! Never !" or... 

African cooking show

10th March 2017 The other day I realised that I had eaten food in many African countries outside South Africa and had never passed on my experiences. So, here, in no particular order, beginning with Swaziland, are my experiences. Somewhere, I know that in Swaziland there is a restaurant that serves fine food. I... 

Slave labour

3rd March 2017 Thomas Brassey and William Mackenzie built the greater part of the Paris and Rouen Railway. They were British. Their firm got the job because the French contractors were too expensive. Between 1841 and 1844, they built about 700 km of railway line in France. Very little of the work was done with... 

Climate change a 100% robust hoodwink

24th February 2017   I had to explain to somebody that the United States in 1945 dropped two nuclear bombs on Japan. The first bomb was a uranium atom bomb. The second bomb was a plutonium bomb. Following the detonation of these devices USA, Britain, France, Russia developed programs to test bombs of increasing... 

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