The weird ethics of super soldiers

Why war is different.

The Lance Armstrong scandal and subsequent revelations of widespread doping in professional cycling laid waste to the sport’s credibility and public reaction was clear enough - doping is cheating and cheating is wrong. But does this ethic hold true in all situations? Could the advantage Armstrong sought, judged as bitterly unfair in the sporting world, be applicable in the context of modern warfare?

War is a thoroughly unique circumstance. If soldiers are tasked with defending a perceived greater good against an oppressor, should every avenue to gain an advantage be explored? And could this ethically extend to furthering the physical limits of human beings?

The US Department of Defense’s shadowy research agency DARPA has long been interested in boosting performance through biochemical means, with its Peak Soldier Performance Programme established to explore ways in which soldiers could operate in the field for up to five days without requiring sustenance. In pursuit of this, no genome was left unturned.

The ethical ground upon which DARPA stand was summed up very clearly by one official who informed Wired that the goal was not to create Supermen, but to make it so that “these kids could perform at their peak, stay at their peak, and come home to their families.” This isn’t so much an issue of overpowering an opponent, as much as it is one of getting soldiers home, safe and sound.

The ethical dilemma posed by boosting a soldier’s capabilities was even discussed within a 2003 report produced by the office of US President George W. Bush. "Biotechnology and the Pursuit of Happiness" explored several ways in which so-called super-soldiers could be produced, and how far the ethical argument in support of such developments could stretch.

“What guidance, if any, does our analysis provide for such moments of extreme peril and consequence… when superior performance is a matter of life and death?” the report questioned, concluding that “there may indeed be times when we must override certain limits or prohibitions that make sense in other contexts.”

A line has, however, been drawn, placing great importance on the notion of “men remaining human even in moments of great crisis.” Alluding to the development of supplements suppressing soldiers’ fear and inhibition, effectively converting them to killing machines capable of acting without both scrutiny and impunity, the US Department of Defense is seemingly unwilling to venture as far as creating submissive super-humans.

Pumping a warfighter full of steroids and supplements raises all kinds of connotations and images of seven-foot tall behemoths rampaging around a battlefield, with nothing but a trail of wanton destruction in their wake. An arms race for the modern era, US soldiers could soon be enjoying the same kind of physical advantage Armstrong held over his opponents, with all too familiar results.

The ethical debate raises several legitimate concerns regarding the enhancement of man’s physical limits and retaining principles of humanity, but the arguments Armstrong’s opponents used cannot be replicated for the unique context of war. If the greater good is indeed at stake, surely each and every feasible advantage should be explored?

Read more here.

Photograph: Getty Images

Liam Stoker is the aerospace and defence features writer for the NRI Digital network.

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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.