Car driving tips and theory » Understeer http://definedriving.com Car driving tips and theory. Here you will get tips about automobile parts, how to do driving, driving techniques, how to maintain your car ,its mileage etc Mon, 26 Jul 2010 14:54:28 +0000 en hourly 1 http://wordpress.org/?v=3.0 Terminal Understeer http://definedriving.com/driving/terminal-understeer http://definedriving.com/driving/terminal-understeer#comments Mon, 10 May 2010 01:05:09 +0000 driver http://definedriving.com/?p=609 Related posts:
  1. Design and understeer
  2. Understeer
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]]> Depending on the road conditions, speed, and the traction available, a car may understeer or oversteer. However, the design of the car will tend to produce a specific “terminal” condition, as the car is forced to and past its limit of adhesion. As the result of the design of a car, it tends to understeer when the cornering load exceeds the traction of the tire. Such a situation can be termed as “Terminal Understeer”.

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]]> http://definedriving.com/driving/terminal-understeer/feed 1 Design and understeer http://definedriving.com/understeer/design-and-understeer/design-and-understeer http://definedriving.com/understeer/design-and-understeer/design-and-understeer#comments Thu, 12 Nov 2009 02:24:40 +0000 driver http://definedriving.com/?p=28 Related posts:
  1. Terminal Understeer
  2. Understeer
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]]> Terminal handling conditions can be termed as a function of the length of the car and front/rear weight distribution (and thus the polar moment of inertia of the car) and the front/rear tire traction. The front/rear tire traction is further modified by the relative toll stiffness of the front and rear, that affect the outward weight transferring while cornering. A car with a heavy front with low rear roll stiffness will tend to have a chance to terminal understeer. The rear roll stiffness can be achived by using soft sprint and/or undersized or nonexistent rear anti roll bars. In this condition, since the front tires are more heavily loaded even in the static state, will attain the limits of their adhesion before the rear tires, and thus will help to develop large slip angles. Front wheel drive cars are prone to understeer, not only because their front is usually heavy, but also due to the reduced ultimate grip since the power transmission is through the front wheels.

A lot of automakers design their cars for terminal understeer in a belief that for an average driver it is easier to control the car then terminal oversteer, inspite of the fact that understeer and oversteer can cause a loss of control. Understeer can be ofter reduced by just reducing the speed of the car unlike the terminal oversteer which often requires several steering corrections.

Generally, race drivers prefer a neutral condition or atleast for certain types of racing or some tracks a mild degree or terminal oversteer, since the terminal understeer forces a loss of speed in tight corners.

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]]> http://definedriving.com/understeer/design-and-understeer/design-and-understeer/feed 1 Physics of understeering http://definedriving.com/understeer/physics-of-understeering/physics-of-understeering http://definedriving.com/understeer/physics-of-understeering/physics-of-understeering#comments Thu, 12 Nov 2009 02:19:59 +0000 driver http://definedriving.com/?p=26 Related posts:
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]]> The lateral velocity of a wheeled vehicle with pneumatic tires, while cornering under high speed will be greater than the speed in the direction to which the wheels are pointed. Here high speed indicated anything greater than approximately 10 mph or 16 kmph. The angle between the direction of a pointing of a rolling wheel with its actual angle is known as slip angle. Or in simple, slip angle is the angle between the natural path of the tires with its actual path. The car is said to be in the neutral steering state, if the slip angle of front wheel is equal to the slip angle of the rear wheel. The car is said to be understeering, if the slip angle of the front wheels exceed the slip angle of the rear wheel. Likewise, if the slip angle of the rear wheel exceeds the slip angle of the front wheel, the car is said to be oversteering.

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]]> http://definedriving.com/understeer/physics-of-understeering/physics-of-understeering/feed 0 Understeer http://definedriving.com/understeer/understeer http://definedriving.com/understeer/understeer#comments Thu, 12 Nov 2009 02:15:34 +0000 driver http://definedriving.com/?p=21 Related posts:
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]]> understeer

The handling condition during cornering in which the circular path of the car’s motion is of a greater diameter than the circle indicated by the direction the car’s wheels are pointed is termed as Understeer. In other words, understeering happens when the front of the car does not  have as much grip as the driver requires, and the car tends to plogh straight on at a corner.

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