
	Where results make sense

Topic: Unsprung weight

Related Topics

DeDion axle

Live axle

Disc brake

Vehicle dynamics

Ackermann steering geometry

Inertia

In the News (Tue 8 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Buell Technology \| Motorbikes
		unsprung weight governs the inertia of suspension components, affecting their ability to respond to bumps and changes in direction or road surface.
		High unsprung weight has a negative effect on overall handling ability, especially on imperfect surfaces, like a road.
		The rim mounted discs reduce the unsprung weight of the front wheel by 3.2 kgs (7 lbs) when compared to quality dual disc setups.
	www.diseno-art.com /encyclopedia/vehicles/road/bikes/articles/buell_technology.html (312 words)

	Car handling - WOI Encyclopedia Italia
		So the "wheel bounce" or resonant motion of the unsprung weight moving up and down on the springiness of the tire is only poorly damped, mainly by the dampers or Shock absorbers of the suspension.
		This unsprung weight includes the wheels and tires, usually the brakes, plus some percentage of the suspension, depending on how much of the suspension moves with the body and how much with the wheels; for instance a solid axle is completely unsprung.
		The main factors that improve unsprung weight are a sprung differential (as opposed to live axle) and inboard brakes.
	www.wheelsofitaly.com /wiki/index.php?title=Car_handling&redirect=no (5097 words)

	Unsprung weight - Wikipedia, the free encyclopedia
		(The mass of the body and other components supported by the suspension is the sprung mass.) Unsprung weight includes the mass of components such as the wheel spindles, wheel bearings, tires, and a portion of the weight of driveshafts, springs, shock absorbers, and suspension links.
		If the vehicle's brakes are mounted outboard (i.e., within the wheel), their weight is also part of the unsprung weight.
		Bumps and surface imperfections in the road cause tire compression--which induces a force on the unsprung weight.
	en.wikipedia.org /wiki/Unsprung_weight (682 words)

	Sprung Vs. Unsprung Weight: Definition and Examples
		Weight controlled by the suspension, and usually below the suspension, which forces it into contact with the road surface or other components, is unsprung weight.
		The unsprung vs. sprung weight percentage greatly affects wheel control, but its importance is almost entirely limited to un-even surfaces, or conditions where the attitude of the vehicle changes (such as through G forces).
		The unsprung vs. sprung weight percentage also affects ride comfort, since lighter springs are needed to maintain traction and control with lighter unsprung components (alloy wheels and swing-arm, alloy calipers, composite springs, etc.), the chassis is less disturbed by wheel movement and road surface irregularities.
	victorylibrary.com /brit/M-sprung-c.htm (868 words)

	Sprung Vs. Unsprung Chassis Weight: Definition and Examples
		Weight removed from an unsprung component, such as a rear wheel or axle housing, may affect traction if the wheel is not under control during launch.
		The unsprung vs. sprung weight percentage also affects ride comfort, since lighter springs are needed to maintain traction and control with lighter unsprung components (alloy wheels, independent rear suspension, alloy calipers, composite springs, in-board brakes, etc.), the chassis is less disturbed by wheel movement and road surface irregularities.
		Almost all of the remainder of the car is sprung weight, including some components that move, oscillate, reciprocate and/or rotate, including the motor and transmission, since their movement is still supported by the suspension which isolates them from the road surface.
	victorylibrary.com /mopar/sprung-c.htm (811 words)

	spring tech
		Unsprung weight is the tire and wheel, hub, upright, brakes, and about half the weight of the shock and control arms.
		For the rear suspension of a truck, the unsprung weight is the tires and wheels, the entire rearend, and half the weight of the shock and traction bars.
		The stock weight distribution is 57/43, but I have removed the class II hitch, the spare, and the rear bumper (-208 lbs), as well as relocated the 75 lb battery to the rear.
	www.timskelton.com /lightning/race_prep/suspension/springs.htm (1718 words)

	Race Car Design Tips and Information - Suspension
		Unsprung weight is a measurement of the weight of everything outboard of the wishbones or suspension links, plus 1/2 of the weight of the wishbones or links and spring/shock.
		Unsprung weight, or the weight comprised by tire, wheel and suspension affects how well the tire follows the bumps and dips in the road surface.
		The weight of these suspension parts by itself is not so critical as the ratio between the car's sprung weight (chassis, driver, engine, etc) and the unsprung weight.
	www.gmecca.com /byorc/dtipssuspension.html (1467 words)

	Automobile Ride, Handling, and Suspension
		Unsprung weight includes the mass of the tires, brakes, suspension linkages and other components that move in unison with the wheels.
		In today's standard-size automobile, the weight of unsprung components is normally in the range of 13 to 15 percent of the vehicle curb weight.
		Using the two-up weight of both vehicles, the 500 pound unsprung mass of the 3,500 pound car (3,850 lb with two occupants) equates to a 130 pound unsprung mass for Urbacar, which is more in line with the actual weight of the components.
	alcor.concordia.ca /~istih/suspensn.html (8162 words)

	Sprung and unsprung weight - Wheels-InMotion
		The ratio between sprung and unsprung weight is one of the most important components of vehicle ride and handling characteristics.
		In today's standard-size car, the weight of unsprung components is normally in the range of 13 to 15 percent of the vehicle curb weight.
		Using the two-up weight of both vehicles, the 500 pound unsprung mass of the 3,500 pound car (3,850 lb with two occupants) equates to a 130 pound unsprung mass for town car, which is more in line with the actual weight of the components.
	www.wheels-inmotion.co.uk /forum/index.php?showtopic=1462&hl= (876 words)

	MotoGPod Suspension Part 1 - MotorcycleUSA.com
		In a nutshell, unsprung weight is the mass of your motorcycle's tires, wheels, brakes, and suspension, along with anything that's connected to them.
		Well, if the unsprung weight is too high, it means that the wheel will resist moving upwards when you go over that bump and it will be harder to stop that upward motion once it finally gets going - of course the same for downward motion as well.
		Unsprung weight will continually come up in any discussion of motorcycle suspension, or automobile suspension for that matter, so I wanted to make sure we're all on the same page about it.
	www.motorcycle-usa.com /Article_Page.aspx?ArticleID=3099 (1608 words)

	Dynamic Load Transfer
		Unsprung weight transfer (WTU): In roll, weight transfer of unsprung weight is seperate for the front and rear suspensions of the race car.
		As weight is transferred away from the wheel, the chassis is free to move upward, subject to the wheel rate.
		That is, the inside rear wheel weight divided by total rear weight, expressed as a percentage, is greater than the equivalent calculation for the front wheels.
	www.ozebiz.com.au /racetech/theory/wttrans.html (4142 words)

	Technical Mysteries Unraveled
		Unsprung weight is the portion of the vehicle that is not sitting on top of the suspension.
		Unsprung weight is a highly undesirable attribute in suspension design, because the more inertia the unsprung components have, the less inertia the sprung masses have to remain unperturbed over a bump.
		This means that with less unsprung weight the suspension is able to react faster to bumps rather than simply transmitting the shock into the cabin.
	www.ukcar.com /features/tech/suspension/LiveAxel.htm (1069 words)

	Mazda6Tech - Unsprung Weight and Inertia
		Unsprung weight is the term used to describe weight that is not damped on the vehicle.
		Dropping the unsprung weight by 25% (admittedly a difficult thing to do) would decrease the upward force the springs need to counteract by 160lbs per axle, which in turn can allow the use of slightly firmer springs (reducing body roll) without a degregation of the stock ride quality.
		Saving just 8lbs of unsprung weight is an improvement of 10% or more on most cars, which can make a marked improvement in ride and responsiveness.
	www.mazda6tech.com /index.php?option=com_content&task=view&id=16&Itemid=50 (1023 words)

	Suspension and Stuff
		Weight-transfer is achieved by the rider moving their weight inward or weighting the inside footpeg, causing the bike to also fall into the corner.
		Unsprung weight, as the name suggests, is all the components which are not sprung..i.e.
		Unfortunately the tradeoff is the overall weight of an upsidedown fork is usually greater and as a general rule they cost more...sorry class, went off on a bit of a tangent there...
	www.angelfire.com /extreme2/ducati/page8.html (2678 words)

	Musclecarclub.com - Library - Tech - Weight
		An important concept is "unsprung weight." This is weight that is not supported by the suspension of the car.
		This usually includes the the weight of the wheels and tires as well as a percentage of the weight of the suspension itself, including control arms, anti-roll bars, shocks, and struts.
		The lower the unsprung weight, the less work the shocks and springs have to do to keep the tires in contact with the road over bumpy surfaces.
	www.musclecarclub.com /library/tech/weight.shtml (529 words)

	ESPN - Setup specialists strive to have all parts working in harmony - Racing
		Every pound of sprung weight equals one pound, however every pound of unsprung weight is subject to a multiplier that could make its value as high as seven or so pounds so you can see the significance of keeping your unsprung weight to a minimum.
		The reason that unsprung weights and rotating weights are calculated to be heavier is because of the additional energy that is required to move them forward.
		While the springs are designed to support the car's weight and smooth out the impact of the vertical loading during the bump or compression cycle, they also work against the unsprung weight to help hold it down to the track surface and therefore maintain a more consistent tire contact patch.
	sports.espn.go.com /rpm/nascar/icons/news/story?id=3333892 (2083 words)

	Unlocking The Mystery of Unsprung Weight and More
		Unsprung weight is the weight of the components between the springs and the ground.
		The more the unsprung weight, the more the force is stored in the mass trying to keep the mass in motion (upwards), the stiffer the shock needs to be and the more resistance the springs need to stop the motion and push the wheel down to keep it in contact with the ground.
		The shock is a hydraulic damper that absorbs the oscillations of the springs.
	blog.rv.net /2008/05/12/unlocking-the-mystery-of-unsprung-weight-and-more (869 words)

	Sprung, Unsprung and Rotating Mass Weight (Site not responding. Last check: )
		"Sprung" weight is a term used to describe the parts of an automobile that are supported by the front and rear springs.
		"Unsprung" weight is a term used to describe the portion of a vehicle that is not supported by the suspension (i.e.
		Unsprung weight is one of the most critical factors affecting a vehicle's road holding ability.
	mysite.verizon.net /txsnakecharmer/sprung.htm (216 words)

	Definition
		Unsprung weight: Weight of the part of the car that is not supported by the suspension.
		It’s made of the weight of the tire, the wheel hub, the brake and half the weight of the axle and suspension links.
		Equal to the overall weight minus the unsprung weight.
	www.240sx.org /links/installs/coilover/coilover/definition.html (406 words)

	weight reduction
		Weight in ahead of the front axle or behind the rear axle is undesirable, as it increases the polar moment of inertia (picture the bar that high-wire artists use to keep them stable).
		Also note that most of the weight reduction is in the rear, which does nothing to help the already front-heavy front-to-rear balance.
		Note that there is a school of thought which holds that removal of sprung weight without removal of an equivalent proportion of unsprung weight may actually cause the truck to handle worse.
	www.timskelton.com /lightning/race_prep/weight/weight.htm (1009 words)

	February 2002 Nissan Performance Magazine - Project Sentra QG18DE- OZ Racing Wheels and Kumho Tires
		Unsprung weight is that portion of a vehicle that is not supported by the suspension (i.e.
		Unsprung mass (or weight) is commonly defined as mass not suspended (or sprung) from the suspension.
		In all reality, the effect of unsprung weight changes aren't very noticeable (unless the changes are large), but they are there.
	www.nissanperformancemag.com /february02/oz.shtml (1602 words)

	primer
		And place as much weight as feasible low and toward the center of the vehicle, except high for drag racing, somewhat higher for dirt, and towards the left (driver’s side) and maybe a bit more rearward for circle racing.
		The greater the distance between the Cg and the roll axis, the greater the tendency of the vehicle to roll, and, accordingly, the stiffer the swaybars for a given degree of roll.
		Vehicle weight either moves directly with wheel movement -unsprung weight- or indirectly with the wheel as cushioned by the suspension spring -sprung weight.
	ingallseng.com /performance/primer.html (4905 words)

	Motorcycle Daily
		Thus the weight of the oil is also carried extremely low, and don't worry - being located extremely close to the swingarm's pivot point means the oil has a negligible affect on unsprung weight.
		Speaking of unsprung weight, it comprises the second part of the 'ToT' - that is, low unsprung weight.
		Decreasing unsprung weight makes it easier for the suspension to damp the motion of the wheels, which pays dividends in the form of handling, stability (particularly over the unavoidable mid-corner bumps), and even straight-line ride quality.
	www.motorcycledaily.com /20july06_2007buell_xb12s.htm (2325 words)

Try your search on: Qwika (all wikis)