PDA

View Full Version : Higher Speed Control



free rider
22/07/2005, 16:23
British Colombia Safety Council © 2002

Higher speed cornering is an art, but one built on a foundation of science. As a motorcycle builds speed, the spinning mass of the wheels and brake discs accumulate a lot of energy in the form of rotational inertia. That's a fancy term describing the fact that a spinning mass has a tendency to keep spinning in the same plane.
At speeds higher than about 20-25 km/hr the bike actually resists efforts to turn the handlebars. The faster you're going the greater the effect. In science speak, the input force (what you apply to the handlebars) is translated 90 degrees in the direction of rotation.
Net effect - if you attempt to turn the handlebars to the left the motorcycle will instead lean, then steer to the right (That's why it's called "countersteering")
Many riders corner by shifting their weight to one side, others push down on foot-pegs with their feet, some do both. Most are also applying a steering input without realizing it, pushing on the right handlebar as they lean to the right and vice versa.
The problem is it's hard to learn how much input gives you how much lean, and how this affects your balance, vision and traction. It's unpredictable and hence scary.
In training we need to teach new and old riders how to corner smoothly, accurately and confidently. Here's the secret to the art of cornering - just sit still and push forward on the handlebar on the side you want to lean to - push left - go left, push right - go right. It's that simple.
Start out trying this technique on a straight section. Gently at first, apply and hold the pressure until you get a lean result, then release the pressure and push the other side to straighten up again.
First get the hang of the technique, then practice to develop smooth, constant control. Use it for weaving around obstacles, manhole covers, debris - and for cornering.
How many degrees of lean are needed for a given radius curve at a given speed? Who cares, just provide enough steering input to give you the steering path you want.
Remember, you want to apply the steering input smoothly, gradually and progressively until your bike is on the path you want. Use this technique and enjoy.