We still don’t really know how bicycles work

Forget mysterious dark matter and the inexplicable accelerating expansion of the universe; the bicycle represents a far more embarrassing hole in the accomplishments of physics.

Let’s be honest, a bit of the pleasure at Chris Froome’s victory in the Tour de France is down to this being our second victory in a row and to the thought that the French haven’t won it since 1985. What must be worse for them, though, is that when it comes to the science of team cycling, even the Belgians are in front.
 
At the University of Mons, researchers are developing something called the Anaconda. It’s never going to be much of a speed machine because it is, in effect, a chain of monocycles with handlebars. These units are connected, by means of hinges that allow them to snake along, to a normal two-wheeled bike at the front. Every rider in the chain can be going in a slightly different direction, which means it takes an enormous amount of control and collaboration to move the thing forward. According to Olivier Verlinden, chief engineer on the project, the main qualification for riders is to be unafraid of falling off.
 
It’s fun, apparently. The idea is to unleash it as a beach-resort bike, the kind of thing that stag and hen parties will use to terrorise seaside towns across the world. But it is also scientifically interesting. Why? Because we still don’t really know how bicycles work.
 
It is rare that most people appreciate the bicycle, but it is quite an extraordinary machine. Push a riderless bike, letting it roll freely at high enough speeds, and it can withstand pushes from the side – it will wobble a little, but quickly recover. In the conventional analysis, that is because the gyroscopic force of the front wheel, its mass and the spontaneous turn of the handlebars all act together to keep the bicycle rolling forwards. This has something to do with the gyroscopic effect, the force that keeps a spinning top upright. You can feel this by removing a wheel from your pushbike and spinning it while you hold the axle spindles. If you try to change the orientation of the wheel, you’ll feel it push back against you.
 
The first mathematical analysis of bicycles suggested that this is also what keeps a moving bike on its wheels. But although the equations were written down in 1910, physicists always had nagging doubts about whether this was the whole story.
 
The most definitive analysis came exactly a century later. It involved an experimental bicycle that had all its gyroscopic effects cancelled out by a system of counter-rotating wheels. The effort of building such a strange contraption was worth it: the resulting paper was published the prestigious journal Science.
 
The publication plunged bicycle dynamics back into chaos. It turns out that taking into account the angles of the headset and the forks, the distribution of weight and the handlebar turn, the gyroscopic effects are not enough to keep a bike upright after all. What does? We simply don’t know. Forget mysterious dark matter and the inexplicable accelerating expansion of the universe; the bicycle represents a far more embarrassing hole in the accomplishments of physics.
 
And it may not be solved any time soon; very few researchers are working full-time on bicycle dynamics and there’s very little money in it. Once we’ve discovered exactly how these contraptions work, it might be possible to come up with bold new designs of bicycle – perhaps even better than the Anaconda. But nobody is desperate for that to happen; not even the French.
 
Maybe that’s OK. In an age where we have worked out the history of the cosmos and the secret of life, it’s rather nice that the humble bicycle keeps our feet on the ground. 
 
Cyclists during the Tour de France. Photo: Getty

Michael Brooks holds a PhD in quantum physics. He writes a weekly science column for the New Statesman, and his most recent book is At the Edge of Uncertainty: 11 Discoveries Taking Science by Surprise.

This article first appeared in the 29 July 2013 issue of the New Statesman, Summer Double Issue

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Labour is a pioneer in fighting sexism. That doesn't mean there's no sexism in Labour

While we campaign against misogyny, we must not fall into the trap of thinking Labour is above it; doing so lets women members down and puts the party in danger of not taking them seriously when they report incidents. 

I’m in the Labour party to fight for equality. I cheered when Labour announced that one of its three Budget tests was ensuring the burden of cuts didn’t fall on women. I celebrated the party’s record of winning rights for women on International Women’s Day. And I marched with Labour women to end male violence against women and girls.

I’m proud of the work we’re doing for women across the country. But, as the Labour party fights for me to feel safer in society, I still feel unsafe in the Labour party.

These problems are not unique to the Labour party; misogyny is everywhere in politics. You just have to look on Twitter to see women MPs – and any woman who speaks out – receiving rape and death threats. Women at political events are subject to threatening behaviour and sexual harassment. Sexism and violence against women at its heart is about power and control. And, as we all know, nowhere is power more highly-prized and sought-after than in politics.

While we campaign against misogyny, we must not fall into the trap of thinking Labour is above it; doing so lets women members down and puts the party in danger of not taking them seriously when they report incidents. 

The House of Commons’ women and equalities committee recently stated that political parties should have robust procedures in place to prevent intimidation, bullying or sexual harassment. The committee looked at this thanks to the work of Gavin Shuker, who has helped in taking up this issue since we first started highlighting it. Labour should follow this advice, put its values into action and change its structures and culture if we are to make our party safe for women.

We need thorough and enforced codes of conduct: online, offline and at all levels of the party, from branches to the parliamentary Labour party. These should be made clear to everyone upon joining, include reminders at the start of meetings and be up in every campaign office in the country.

Too many members – particularly new and young members – say they don’t know how to report incidents or what will happen if they do. This information should be given to all members, made easily available on the website and circulated to all local parties.

Too many people – including MPs and local party leaders – still say they wouldn’t know what to do if a local member told them they had been sexually harassed. All staff members and people in positions of responsibility should be given training, so they can support members and feel comfortable responding to issues.

Having a third party organisation or individual to deal with complaints of this nature would be a huge help too. Their contact details should be easy to find on the website. This organisation should, crucially, be independent of influence from elsewhere in the party. This would allow them to perform their role without political pressures or bias. We need a system that gives members confidence that they will be treated fairly, not one where members are worried about reporting incidents because the man in question holds power, has certain political allies or is a friend or colleague of the person you are supposed to complain to.

Giving this third party the resources and access they need to identify issues within our party and recommend further changes to the NEC would help to begin a continuous process of improving both our structures and culture.

Labour should champion a more open culture, where people feel able to report incidents and don't have to worry about ruining their career or facing political repercussions if they do so. Problems should not be brushed under the carpet. It takes bravery to admit your faults. But, until these problems are faced head-on, they will not go away.

Being the party of equality does not mean Labour is immune to misogyny and sexual harassment, but it does mean it should lead the way on tackling it.

Now is the time for Labour to practice what it preaches and prove it is serious about women’s equality.

Bex Bailey was on Labour’s national executive committee from 2014 to 2016.