Camber angle Totally Explained

Everything about Camber Angle totally explained

Camber angle is the angle made by the wheel of an automobile; specifically, it's the angle between the vertical axis of the wheel and the vertical axis of the vehicle when viewed from the front or rear. It is used in the design of steering and suspension. If the top of the wheel is further out than the bottom (that is, away from the axle), it's called positive camber; if the bottom of the wheel is further out than the top, it's called negative camber.
   Camber angle alters the handling qualities of a particular suspension design; in particular, negative camber improves grip when cornering. This is because it places the tire at a more optimal angle to the road, transmitting the forces through the vertical plane of the tire, rather than through a shear force across it. Another reason for negative camber is that a rubber tire tends to roll on itself while cornering. If the tire had zero camber, the inside edge of the contact patch would begin to lift off of the ground, thereby reducing the area of the contact patch. By applying negative camber, this effect is reduced, thereby maximizing the contact patch area. Note that this is only true for the outside tire during the turn; the inside tire would benefit most from positive camber.
   On the other hand, for maximum straight-line acceleration, the greatest traction will be attained when the camber angle is zero and the tread is flat on the road. Proper management of camber angle is a major factor in suspension design, and must incorporate not only idealized geometric models, but also real-life behavior of the components; flex, distortion, elasticity, etc. What was once an art has now become much more scientific with the use of computers, which can optimize all of the variables mathematically instead of relying on the designer's intuitive feel and experience. As a result, the handling of even low-priced automobiles has improved dramatically in recent years.
   In cars with double wishbone suspensions, camber angle was usually adjustable, but in newer with McPherson strut suspensions, it's normally fixed. While this may reduce maintenance requirements, if the car is lowered by use of shortened springs, this changes the camber angle (as described in McPherson strut) and can lead to increased tire wear and impaired handling. For this reason, individuals who are serious about modifying their car for better handling won't only lower the body, but also modify the mounting point of the top of the struts to the body to allow some inward/outward (relative to longitudinal centerline the of vehicle) movement for camber adjustment. Aftermarket plates with slots for strut mounts instead of just holes are available for most of the commonly modified models of cars.
   Off-Road vehicles such as agricultural tractors generally use positive camber. In such vehicles, the positive camber angle helps to achieve a lower steering effort.

Road camber

In roads, an adverse camber refers to any road that tilts on the same side that a vehicle leans to on a road. The term camber or cant refers to the way in which a road slopes from its centre. Usually on a right hand bend the road would slope downwards from left to right, this is known as a crossfall camber or cross slope- the opposite to an adverse camber. Adverse cambers can occur at roadworks.

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