Physics Of The Stability

In fact, why it is stable? What forces keep on the move in the balance structure, completely unsustainable in the stillness?

To find out it a few years ago set out to British scientist – a chemist and spectroscopist David Jones. He decided to take himself a test existing explanations bike stability. And the theories in this regard there are several:

1. Cyclists must be stable due to the actions of the “rider”, who, feeling that his crew bends, turns the steering wheel in the direction of the fall. Bike starts to move along the curve, there is a centrifugal force directed in the opposite slope. It’s the car straightens. This view explains why the stationary bike falls, why keep the balance more easily, the higher the speed, and why on the bike, which does not turn the steering wheel, you can not ride. more here

However, this theory can not be true, or at least it is true not to the end. Anyone who has ridden a bike, surely noticed that the bike is very stable and can not fall off at high speed, even if you want to. In the course of the bike is largely stable itself, and the problem that the rider so as not to disturb the stability of exercise machine,

Jones suggests that its HB-1 – a bicycle with gyroscopic forces neutralized – you can even go “hands-free”.
We can say, learning to ride a bike lies in the fact that the trainee instill confidence in the stability of the machine and learn to maintain it timely light turns steering. If disperse the bike without a rider, he will hold on wheels and twenty seconds after going a long way before the fall. Fixed the bike crash at once – can not stand it. Thus, the actions of the rider – an important but not the only factor. more info

2. A more complex theory takes into account the stability of the bicycle front wheel gyroscopic effect.

Bicycling is stable if its center of gravity is between the supports – the points of contact of the wheels and the ground, on the same line with these points. When the bicycle is tilted, the center of gravity is on the side of this line, and the machine begins to fall. However, at the same time with a slope appears gyroscopic force, the one that does not fall to any spinning top – and because the wheels rotate! Since the front wheel is reinforced so that it can rotate, this force rotates it in the direction of inclination of the machine, their point of contact lands shifted in the same direction, and the center of gravity is again between the lines of supports.

Ought to remove the gyroscopic force – one of the factors due to which the bike can be sustained, for it was made. “Neezdyaschy first bike model” – HB-1: front fork ordinary bike was further reinforced by a wheel which does not touch the ground, equal to the weight and diameter of the front wheel. When he whirled in the direction opposite to the rotation of the impeller, it creates a gyroscopic moment of opposite sign, so that the total time of both wheels becomes zero. info

However, HB-1 deceived the hopes vested in him ride it was easy enough. It is well managed as privraschenii additional wheel in any direction, and in its complete immobility. It became clear that the gyroscopic forces play a very small role when driving on normal, normal speeds. When this “neezdyaschy bike” ran riderless, he behaved very interesting. If until tional wheels rotate against the rotation of the front wheel, it fell almost instantly. And while rotating the wheel in one direction, this bike has demonstrated amazing resilience even at low speed. The result from the completion of the obvious: an empty, easy bike gyro stabilized impact, and the heavy bike rider – no, it requires constant human effort to keep it in balance. The combination of two simple theories seem to accurately explain all the facts.