ZINIO logo
Popular Mechanics South Africa

Popular Mechanics South Africa July 2019

The South African edition of Popular Mechanics was launched in 2002 and has fast become the acknowledged voice of science and technology in South Africa. Underpinning its rich sci-tech content is an ever-changing mix of articles covering everything from automotive news and outdoor adventures to DIY projects. In essence, it explains how our world works

Leggi di più
South Africa
RamsayMedia (PTY) Ltd
SPECIALE: Get 3 extra issues FREE with your subscription!
1,41 €(VAT inclusa)
11,87 €(VAT inclusa)
15 Numeri

in questo numero

2 minuti
mobile devices

HAVING NEVER REALLY thought about it, it was quite interesting to discover recently that the average walking speed for humans is around 5 km/h. On a Saturday not long ago, some friends and I took a relaxed mountain hike on the back of the Table Mountain range, and ended up covering close on 16 km – with our stops, we did the whole route in roughly five and a half hours. My iPhone told me I’d taken 24 118 steps in total, which just seems amazing to me. Legs and feet are remarkable things. My bedtime reading at the moment has been Christopher McDougall’s bestselling book Born to Run, which details how incredibly well-adapted our bodies are to walking, and more specifically, endurance running, even compared to some animal species we…

7 minuti
winning letter

A shot in the dark I’m not good at keeping things short, but I’ll try my best. Ten years ago, after receiving my first decent pay cheque, I was standing in front of a 40-inch plasma TV with a salesman’s voice ringing in my ears, when I made a decision: My house won’t be like my parents’, with everyone spending copious amounts of precious time glued to the screen. Don’t get me wrong, I love tech. In fact, I do CNC programming for a living. But it was on that day that my love-hate relationship with tech gadgets began. I do own a television today – a 15-year-old LG Flatron, and a DVD player. I don’t have DSTV or Netflix, or even a bunny-ears aerial. We watch DVDs, which in today’s age feels quite…

1 minuti
time machine

1 JULY 1968 Our Wingless Aircraft that Flies in Space 51 years ago, we brought you the story of the Air Force X-24 – a wingless experimental aircraf t that was being developed by the United States, and would serve as a new kind of spacecraft. Taking off on a rocket, it would achieve supersonic speeds to reach orbit, and then land back on Earth like a traditional aeroplane. 2 JULY 1960 Tips on Lubrication It’s always essential to keep your appliances and wear parts well oiled, so as to ensure nothing starts squeaking. We gave a list of all the important types of lubricants, as well as the specific purposes for which they should be used. Constant maintenance means that your bearings and gaskets are well cared for. 3 JULY 1974 The horseless carriage returns –…

1 minuti
large photo of the month

The town of Cushing, Oklahoma (population: 7 704), is nicknamed the ‘Pipeline Crossroads of the World ’. It’s home to 307 oil-storage tanks, one of the largest facilities in the US. The price of oil delivered daily to Cushing has determined crude oil’s valuation on the New York Mercantile Exchange for decades. But that benchmark may be changing: Recent drilling in the Southwest’s Permian Basin has boosted domestic production, and a 40-year ban on crude oil exports was lifted in 2015, lowering demand for storage. Although the Cushing complex can accommodate more than 80 million barrels, its reserves dipped as low as 21.8 million last year. As the holdings change, so do the tanks themselves. Most in this photo belong to the SemGroup company; they were constructed with external floating…

4 minuti
tiny device can detect nuclear armageddon

THE TRAIN RIDE was as uneventful as the dozens of others the man had taken from Washington, DC, to New York City. He watched the scenery change as he headed north, past Baltimore, along the Delaware River to Philadelphia, through Newark, then into the long, dark tunnel on the final approach to New York’s Pennsylvania Station. Throughout the trip, the device in his pocket – the size of a portable hard drive, all black, with a single button on the centre of one side and a blinking blue LED light above it – remained silent. After getting off the train, the man moved with the large midday crowd towards the entrance to the subway. On the uptown platform, standing near a dark-haired woman in her late 40s, he felt his pocket…

7 minuti
if you were cloned, would the clone have the same sense of humour as you?

IT SURE WOULD be a time-saver if it did. Imagine how much more productive you’d be if you had someone else to laugh at your own jokes for you. That would free up at least an hour a week for the typical middle-aged dad, who, despite his invariably generous self-appraisal, is deemed by his wife and children to be roughly as humorous as Lenin’s funeral. Ask us how we know. If we may recast your question slightly, what’s actually at issue here is whether a person’s sense of humour is wholly innate, or whether its development is influenced by external factors. Prevailing scientific thinking suggests that, like most personality traits, a sense of humour is the product of both nature and nurture. ‘There’s almost nothing in the emotion space I can…