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Topic: Understeer

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	understeer@Everything2.com (Site not responding. Last check: 2007-11-03)
		Usually understeer refers to the case where you are skidding the front tires.
		That's extreme understeer, it can be caused by braking hard, accelerating hard, turning too suddenly as aiken says or other traction issues.
		Understeer is also affected by tyre pressures, weight distribution of the car and suspension geometries.
	www.everything2.com /index.pl?node=understeer (437 words)

	Understeer - Wikipedia, the free encyclopedia
		Understeer is a term for a car handling condition during cornering in which the circular path of the vehicle's motion is of a markedly greater diameter than the circle indicated by the direction its wheels are pointed.
		Classically, understeer happens when the front tyres have a loss of traction during a cornering situation, thus causing the front-end of the vehicle to have less mechanical grip and become unable to follow the trajectory in the corner.
		Although understeer and oversteer can each cause a loss of control, many automakers design their vehicles for terminal understeer in the belief that it is easier for the average driver to control than terminal oversteer.
	en.wikipedia.org /wiki/Understeer (770 words)

	Understeer - (Site not responding. Last check: 2007-11-03)
		Understeer is a term for a car handling condition during cornering in which the circular path of the vehicle's motion is of a greater diameter than the circle indicated by the direction its wheels are pointed.
		Terminal handling conditions are a function of vehicle length and front/rear weight distribution (and thus the vehicle's polar moment of inertia) and front/rear tire traction (further modified by the relative roll stiffness of the front and rear, which affects the outward weight transfer during cornering).
		Front-wheel drive cars are also prone to understeer because not only are they usually front-heavy, transmitting power through the front wheels also reduces their ultimate grip.
	psychcentral.com /psypsych/Understeer (613 words)

	Back Room: Understeer / Oversteeer
		Put simply, understeer is when the front wheels run wide of the intended turn-in path when you steer to go left or right, oversteer is when the rear wheels attempt to do so; in the case of the latter if you don't catch it in time you could/will go into a spin.
		Understeer is when you turn the front wheels more, and they don't grip, the front of the car is ploughing on and you're not going to make that bend, you're not turning hard enough.
		Understeer is not liked in racing as in two wheel drive cars once there is understeer applying more throttle usually makes it worse, so you cannot accelerate out the corner as fast, which reduces the all important exit speed.
	www.honestjohn.co.uk /forum/post?t=23232 (3181 words)

	Correcting Understeer in an '01 330cic - DTM Power (Site not responding. Last check: 2007-11-03)
		The easiest way to prevent understeer is to brake early, grab a lower gear and then accelerate your way through the turn.
		Understeer is when the front end of a vehicle pushes through a turn.
		understeer for me is when i use the lawn mower and i try to turn to get around a tree...
	www.dtmpower.net /forum/showthread.php?t=55760 (471 words)

	Ford Explorer Rollover Recall Lawsuit, Roll Over, Tire Recall, Mountaineer Rollovers
		Table 2 includes the understeer gradients reported by Dr. Guenther for vehicles in the lightly loaded condition without a rear tire tread separation along with understeer gradients for comparable vehicles with intact tires that were tested by VRTC and Ford.
		Given the understeer gradients of these vehicles, this is not at all surprising since, as discussed in the Appendix, vehicles with lower levels of understeer will inherently exhibit longer transient response times and higher steady-state gain characteristics at highway speeds than similar type/class vehicles with higher understeer gradients.
		In a situation where a vehicle understeer gradient is reduced to the point that it becomes negative, i.e., it becomes an oversteer vehicle, the vehicle’s steady-state response gains would increase at a rate greater than increases in the vehicle’s speed and the transient response times would usually exceed one second.
	www.fordexplorerrollover.com /recall/Default.cfm (10920 words)

	Understeer and Oversteer
		An understeering vehicle wants to point to the outside of a turn, plowing ahead instead of where the wheels are aimed.
		An easy way to remember the difference is that Understeer is when you see what you're about to hit through the windshield, but Oversteer means you see it in the mirrors...
		That's because it's generally thought that understeer is easier for the average driver to cope with than oversteer, which is probably true.
	www.miracerros.com /mustang/sway3.htm (542 words)

	underSteer TT - Motorsport Tipping Competition - F1, MotoGP, V8 Supercars, WRC
		underSteer is more interactive than fantasy games in which you only get to make a selection once.
		With underSteer you pick the top qualifying results as well as the race finishing positions of the entire field.
		underSteer will assist you by carrying your last picks on to each race until you decide to change them.
	understeer-tt.com (289 words)

	mySportsCar.Com - Understeer / oversteer (Site not responding. Last check: 2007-11-03)
		Also, I think understeer is more of a problem for front-wheel-drive cars like mine, but clarification is needed here too.
		Understeer is the opposite situation where the fron wheels are pushing out around a corner while the rear wheels are taking that inside line.
		Torque steer is related to understeer in that it describes a phenomenon where front wheels loose grip due to acceleration and weight transfer, Thus renedering the car less able to hold cornering force.
	www.mysportscar.com /forum/topic.asp?TOPIC_ID=75 (1114 words)

	Handling 102, part 2 - Cornering and Tire Patch. FAQ, FFR FAQ
		When the car is subjected to side force, probably due to cross wind or the road's irregularities, understeer could resist the force and avoid the car to be steered automatically, therefore the driver need not to correct the steering frequently.
		If the car is heavier at the front, that is, the CG is near the front, obviously the front tyres shares most of the centrifugal force thus they have to generate larger slip angle thus larger frictional force to counter the centrifugal force.
		In addition to the understeer generated by the FWD configuration, the result is even worse.
	www.ffcobra.com /FAQ/handling102_part2.html (3622 words)

	Oversteer And Understeer - ST-Owners.com Forums
		Understeer happens in a turn when the bike keeps trying to straighten out and has to be forced to hold your line round the turn.
		Understeer is when you do not see the impact because your eyes are closed.
		Now road going cars are often set up to understeer a bit, but then again they don't gotta balance like we do, and bikes are better off from neutral to a tad of oversteer.
	www.st-owners.com /forums/showthread.php?p=121483#post121483 (1259 words)

	NASIOC - FAQ: How to reduce understeer
		One of the first, cheapest and probably the easiest ways to reduce understeer is to follow the old axiom “slow in fast out” this really will do wonders with reducing understeer, and it is always cheaper and faster to "fix" the driver.
		When you are trying to reduce understeer you are trying to add traction to the front of the car so the back gives way first.
		ALK also reduces corner exit understeer by reducing the amount of binding in the front suspenion.
	forums.nasioc.com /forums/showthread.php?t=708818 (1585 words)

	VWvortex Forums: Oversteer vs Understeer: DRAW IT!!
		Understeer is where your car pushes straight through a corner when you really want it to go around the corner.
		Understeer, the front wheels lose grip and the car turns less than you want it to, forcing you to turn the steering wheel more.
		That said, FWD cars tend to understeer at the limit because they have most of their weight on the front wheels.
	forums.vwvortex.com /zerothread?id=1160590&page=1 (3121 words)

	Car Forums - understeer? - Car Forum Archives
		Understeer is when the front tires lose grip earlier than the rears, and the car wants to go straighter than the turn.
		Big engine musclecars were usually horribly understeering pigs when it came to cornering.
		The key to eliminating understeer is to keep the outside front tire from being overloaded.
	www.car-forums.com /s7/t12059.html (587 words)

	Oversteer And Understeer - Formula One
		Minor alterations can be made during a pit stop to try and minimise the understeer, such as increased front wing, or more suspension.
		Surely that kind of phenomena would mean that actually his car was okay, because the lack of grip of one would counterbalance the excess grip of the other condition.
		If a car is suffering from neither over nor understeer, the grip will mean that all four tyres are equal and corners can be taken much faster and with the confidence that you aren’t going to lose control.
	www.bellaonline.com /articles/art44274.asp (486 words)

	Forza Motorsport Tuning Basics FAQ - IGN FAQs
		Because of the FF drivetrain (front engine, front-wheel drive), the vehicle is naturally prone to a certain amount of understeer in corners.
		Camber can also affect understeer and oversteer: negative camber on the front wheels will decrease the effects of understeer while increasing the effects of oversteer, while positive camber on the front wheels has the opposite effect.
		Increase the damping in the front and you'll increase a vehicle's tendency to understeer, while drecreasing the damping in the front increases the chance of oversteer.
	faqs.ign.com /articles/613/613408p1.html (2262 words)

	Suspension Tuning Tips
		Understeer: This is when, at the limit of vehicle traction, the front of the car slides first before the rear.
		The crash mode for understeer is that when the limit of adhesion is exceeded, the car will plow strait ahead off the road nose first.
		The additional understeer caused by the bars weight transfer can be eliminated by adding toe-out in the front and rear.
	www.se-r.net /car_info/suspension_tuning.html (9420 words)

	major understeer - maXForums
		For the average driver, understeer and oversteer are generally caused by driver error, rather than car setup.
		BMW's are prone to mild understeer from the factory, but not major understeer.
		If your car has major understeer, then it's more likely that you're simply over-driving the grip of the front tires going into the corner.
	www.maxbimmer.com /forums/showthread.php?pagenumber=1&threadid=4569 (1523 words)

	Winter Tech - Winter Driving Tips (Site not responding. Last check: 2007-11-03)
		Understeer is just what it sounds like: the car is not turning as much as you would like.
		Understeer is usually caused by entering a corner too fast, or by braking while trying to turn.
		Like understeer, oversteer is exactly what it sounds like: your car turns more than you want it to.
	www.tirerack.com /winter/tech/techpage.jsp?techid=119 (1071 words)

	How to Correct Understeer During Cornering \| eHow.com
		Understeer occurs when the front tires of your car lose traction during cornering.
		Understeer can easily be corrected whether you are on the race track or simply driving in bad road conditions like snow.
		When you feel the car is beginning to understeer, gently lift off the gas pedal and straighten the front wheels.
	wehow.ehow.com /how_2001132_correct-understeer-during-cornering.html (305 words)

	West Texas Region SCCA - Car setup guide
		Rear roll resistance increases, increasing oversteer or reducing understeer.
		Rear roll resistance decreases, decreasing oversteer or increasing understeer.
		Rear roll resistance increases, increasing oversteer or decreasing understeer.
	www.wtrscca.org /tech.htm (678 words)

	Bloody understeer!!! - Car Forums and Automotive Chat (Site not responding. Last check: 2007-11-03)
		The only thing im a bit worried about is the understeer the car exhibits while turning at a high rate.
		By feeding the power through the corner and practice, you'll be able to hold it on the edge of understeer and go through/ exit the corner at the highest speed the car is capable of.
		I also found by fitting lower profile tyres (in the case of 18's with 225's/ 35 / 18) the car went around corners better - perhaps it was the less tyre wall flex/ harder ride, dunno.
	www.automotiveforums.com /t51721.html (404 words)

	Vehicle Dynamics
		Understeer: This is when, at the limit of vehicle traction, the front of the car go beyond the limit of adhesion (tire grip) before the rear tires, causing the front end to "plow" or "push".
		When the car understeers you should regain control if you let off the gas, unless of course you run out of road first.
		Too much oversteer; oversteer then understeer if spring is so soft that the car bottoms out during cornering (infinite spring rate) during cornering.
	www.hadamotorsport.com /tech/vehicledynamics.htm (2548 words)

	Automotive Engineering International Online: Tech Briefs, Sep. 1999, Page 5
		A vehicle with extreme understeer will tend to keep going straight when the steering wheel is turned.
		Understeer is sometimes referred to as "push" or "plow." A slight amount of understeer is desirable for stability.
		Pitch—a vehicle is said to pitch when the front end rises while the rear end falls, or vice versa, such as in a fore-and-aft rocking motion.
	www.sae.org /automag/techbriefs_9-99/05.htm (1453 words)

	GTV understeer - Alfa Romeo Bulletin Board & Forums
		This is why Snaidy's car does not understeer if he accelerates before turning her in...
		A pyrometer is also a great tool; I over-did the caster change, resulting in low speed understeer and discovered this by reading a large increase in temperature on the inside of the tire.
		I can verify this works to reduce understeer; the first time I used it was on an almost stock 1971 1750 Spider.
	www.alfabb.com /bb/forums/showthread.php?t=4840 (1055 words)

	digest271.htm
		What > I mean by that is that a car can always understeer, can always > oversteer, can go > from understeer to oversteer or vice versa depending on what the > driver does.
		(too fast into the corner usually makes understeer, too fast out of the corner usually makes oversteer, but even that is a simplification) and...
		understeer and oversteer can be adjusted independantly of each other.
	www.bmw-m.net /digest/Archive_2000_06_digest_191-298/digest271.htm (2698 words)

	Understeer/Oversteer issues. - maXForums
		The front end will run wide at first and I get understeer, then all of a sudden I will get oversteer, then opposite lock, etc. The problem with that is, when I try to powerslide, understeer, then oversteer will put me right into a curb.
		I had a 323GTX and it understeered heaps, I put a nice big swaybar on the back and it made a huge difference.
		It turned in so much quicker and made the car feel alot more neutral, obviously that made it alot easier to provoke oversteer but you could determine how much oversteer was induced rather than packing yourself when the backend suddenly tries to over take the front.
	www.maxbimmer.com /forums/showthread.php?pagenumber=1&threadid=20058 (1010 words)

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