David Miliband to guest-edit next week's New Statesman

Issue to focus on shifts in world power.

A special issue featuring essays, columns and interviews ­— with
Hillary Clinton, Kevin Rudd, Richard Branson, Michael Semple interview with Taliban leader, Tony Blair, Kwame Kwei-Armah, Russell Brand, Ed Miliband, David Walliams, Jonathan Coe, Jo Brand, Ozwald Boateng and many others

For this 80-page edition, David Miliband has commissioned a series of articles around the theme of shifts in world power.

David Miliband said:

“For many years I have wanted to tell New Statesman readers what really matters — so when Jason Cowley asked me to guest-edit an issue it was a challenge I couldn’t resist!

“This is an extraordinary time of economic and political change around the world that is immensely challenging for the west and for the left. So I have produced an issue that tries to explain the big drivers of change in the world, and how the west and the left should react.

“The issue reflects what I care about — from South Shields to human rights to what makes me smile or laugh. And I have tried to produce an issue that is passionate without shouting and uses reason without being technocratic.”

Jason Cowley, editor of the New Statesman, said:

“I asked David to guest-edit because we wanted to produce an issue exploring the great challenges facing the world in what is a period of profound and uneasy transition as power shifts from west to east and the old European social-democratic model becomes unsustainable. As a former foreign secretary and one of our most intellectually capable politicians, he was ideally placed to gather together leading thinkers and politicians in one issue of the New Statesman.

“Our guest-edited issues have proved hugely popular with our readers as well as being great journalistic successes. This one will be no different.”

The issue, cover-dated 16 July, will be on sale in London on Thursday 12 July and in the rest of the country from Friday 13 July. International buyers can obtain copies on our website at www.newstatesman.com.

NOTES FOR EDITORS

David Miliband is the New Statesman’s seventh guest editor, after Alastair Campbell, Ken Livingstone, Melvyn Bragg, Jemima Khan, Rowan Williams and Richard Dawkins.

Exclusives:

Melvyn Bragg’s guest edit on 11 October 2010 featured “Last Letter”, a newly discovered, previously unpublished poem by Ted Hughes about the night that his wife Sylvia Plath committed suicide.

Jemima Khan’s guest edit (11 April 2011) featured her agenda-setting interview with the Deputy Prime Minister, Nick Clegg – in which he declared “I’m not a punchbag” – as well as Hugh Grant’s undercover interview with a former News of the World executive which became a worldwide media sensation.

Rowan Williams’s guest edit on 13 June 2011 dominated the news agenda for several days in response to his bold leader article criticising the coalition. He wrote, "We are being committed to radical, long-term policies for which no one voted.”

Richard Dawkins’s guest edit (19 December 2011) contained the last interview with the writer and polemicist Christopher Hitchens.

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Inside Big Ben: why the world’s most famous clock will soon lose its bong

Every now and then, even the most famous of clocks need a bit of care.

London is soon going to lose one of its most familiar sounds when the world-famous Big Ben falls silent for repairs. The “bonging” chimes that have marked the passing of time for Londoners since 1859 will fall silent for months beginning in 2017 as part of a three-year £29m conservation project.

Of course, “Big Ben” is the nickname of the Great Bell and the bell itself is not in bad shape – even though it does have a huge crack in it.

The bell weighs nearly 14 tonnes and it cracked in 1859 when it was first bonged with a hammer that was way too heavy.

The crack was never repaired. Instead the bell was rotated one eighth of a turn and a lighter (200kg) hammer was installed. The cracked bell has a characteristic sound which we have all grown to love.

Big Ben strikes. UK Parliament.

Instead, it is the Elizabeth Tower (1859) and the clock mechanism (1854), designed by Denison and Airy, that need attention.

Any building or machine needs regular maintenance – we paint our doors and windows when they need it and we repair or replace our cars quite routinely. It is convenient to choose a day when we’re out of the house to paint the doors, or when we don’t need the car to repair the brakes. But a clock just doesn’t stop – especially not a clock as iconic as the Great Clock at the Palace of Westminster.

Repairs to the tower are long overdue. There is corrosion damage to the cast iron roof and to the belfry structure which keeps the bells in place. There is water damage to the masonry and condensation problems will be addressed, too. There are plumbing and electrical works to be done for a lift to be installed in one of the ventilation shafts, toilet facilities and the fitting of low-energy lighting.

Marvel of engineering

The clock mechanism itself is remarkable. In its 162-year history it has only had one major breakdown. In 1976 the speed regulator for the chimes broke and the mechanism sped up to destruction. The resulting damage took months to repair.

The weights that drive the clock are, like the bells and hammers, unimaginably huge. The “drive train” that keeps the pendulum swinging and that turns the hands is driven by a weight of about 100kg. Two other weights that ring the bells are each over a tonne. If any of these weights falls out of control (as in the 1976 incident), they could do a lot of damage.

The pendulum suspension spring is especially critical because it holds up the huge pendulum bob which weighs 321kg. The swinging pendulum releases the “escapement” every two seconds which then turns the hands on the clock’s four faces. If you look very closely, you will see that the minute hand doesn’t move smoothly but it sits still most of the time, only moving on each tick by 1.5cm.

The pendulum swings back and forth 21,600 times a day. That’s nearly 8m times a year, bending the pendulum spring. Like any metal, it has the potential to suffer from fatigue. The pendulum needs to be lifted out of the clock so that the spring can be closely inspected.

The clock derives its remarkable accuracy in part from the temperature compensation which is built into the construction of the pendulum. This was yet another of John Harrison’s genius ideas (you probably know him from longitude fame). He came up with the solution of using metals of differing temperature expansion coefficient so that the pendulum doesn’t change in length as the temperature changes with the seasons.

In the Westminster clock, the pendulum shaft is made of concentric tubes of steel and zinc. A similar construction is described for the clock in Trinity College Cambridge and near perfect temperature compensation can be achieved. But zinc is a ductile metal and the tube deforms with time under the heavy load of the 321kg pendulum bob. This “creeping” will cause the temperature compensation to jam up and become less effective.

So stopping the clock will also be a good opportunity to dismantle the pendulum completely and to check that the zinc tube is sliding freely. This in itself is a few days' work.

What makes it tick

But the truly clever bit of this clock is the escapement. All clocks have one - it’s what makes the clock tick, quite literally. Denison developed his new gravity escapement especially for the Westminster clock. It decouples the driving force of the falling weight from the periodic force that maintains the motion of the pendulum. To this day, the best tower clocks in England use the gravity escapement leading to remarkable accuracy – better even than that of your quartz crystal wrist watch.

In Denison’s gravity escapement, the “tick” is the impact of the “legs” of the escapement colliding with hardened steel seats. Each collision causes microscopic damage which, accumulated over millions of collisions per year, causes wear and tear affecting the accuracy of the clock. It is impossible to inspect the escapement without stopping the clock. Part of the maintenance proposed during this stoppage is a thorough overhaul of the escapement and the other workings of the clock.

The Westminster clock is a remarkable icon for London and for England. For more than 150 years it has reminded us of each hour, tirelessly. That’s what I love about clocks – they seem to carry on without a fuss. But every now and then even the most famous of clocks need a bit of care. After this period of pampering, “Big Ben” ought to be set for another 100 or so years of trouble-free running.

The Conversation

Hugh Hunt is a Reader in Engineering Dynamics and Vibration at the University of Cambridge.

This article was originally published on The Conversation. Read the original article.