Axle Weight Distribution Software' title='Axle Weight Distribution Software' />Torsion bar suspension Wikipedia. A torsion bar with no load applied. A torsion bar with a load applied. A torsion bar suspension, also known as a torsion spring suspension not to be confused with a torsion beam rear suspension, is a general term for any vehicle suspension that uses a torsion bar as its main weight bearing spring. One end of a long metal bar is attached firmly to the vehicle chassis the opposite end terminates in a lever, the torsion key, mounted perpendicular to the bar, that is attached to a suspension arm, a spindle, or the axle. Axle Weight Distribution Software' title='Axle Weight Distribution Software' />Vertical motion of the wheel causes the bar to twist around its axis and is resisted by the bars torsion resistance. The effective spring rate of the bar is determined by its length, cross section, shape, material, and manufacturing process. Torsion bar suspensions are used on combat vehicles and tanks like the T 7. Leopard 1, Leopard 2, M2. Pershing, M1. 8 Hellcat, and the M1 Abrams many tanks from World War II used this suspension, and on modern trucks and SUVs from Ford, Chrysler, GM, Mitsubishi, Mazda, Nissan, Isuzu and Toyota. Manufacturers change the torsion bar or key to adjust the ride height, usually to compensate for engine weight. While the ride height may be adjusted by turning the adjuster bolts on the stock torsion key, rotating the stock key too far can bend the adjusting bolt and place the shock piston outside its standard travel. Over rotating the torsion bars can also cause the suspension to hit the bump stop prematurely, causing a harsh ride. Aftermarket forged metal torsion key kits use relocked adjuster keys to prevent over rotation, and shock brackets to keep the piston travel in the stock range. Advantages and disadvantageseditThe main advantages of a torsion bar suspension are durability, easy adjustability of ride height, and small profile along the width of the vehicle. It takes up less of the vehicles interior volume than coil springs. Torsion bars reached the height of their popularity on mass production road cars in the middle of the 2. The acronyms formed of 1 or 2 characters were intentionally removed, because it is considered that they can be interpreted and can generate confusions. Weight Transfer. As discussed in an earlier chapter, the load sensitivity of a tire means that, for any pair of tires on the same axle or the same end of the car for. A torsion bar suspension, also known as a torsion spring suspension not to be confused with a torsion beam rear suspension, is a general term for any vehicle. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get. Fairbanks Scales manufactures weighing devices for any need, from forklift loads to heavy capacity trucks to shipping packages as well as instruments and accessories. Axle Weight Distribution Software' title='Axle Weight Distribution Software' />At a time when the mechanics of stress and metal fatigue in monocoque body frames was poorly understood, torsion bars were very attractive to vehicle designers as the bars could be mounted to reinforced parts of the central structure, typically the bulkhead. Using Mac. Pherson struts to achieve independent front suspension with coil springs meant providing strong turrets in the frontal structure of the car. A disadvantage is that torsion bars, unlike coil springs, usually cannot provide a progressive spring rate. In most torsion bar systems, ride height and therefore many handling features may be changed by simply adjusting bolts that connect the torsion bars to the steering knuckles. In most cars with this type of suspension, swapping torsion bars for a different spring rate is usually an easy task. LevelingeditSome vehicles use torsion bars to provide automatic levelling, using a motor to pre stress the bars to provide greater resistance to load and, in some cases depending on the speed with which the motors can act, to respond to changes in road conditions. Height adjustable suspension has been used to implement a wheel change mode where the vehicle is raised on three wheels so that the remaining wheel is lifted off the ground without the aid of a jack. The ULTIMATE Racing Car Chassis Setup Guide and Tutorial. The Most Complete Racing Car Chassis Setup Tutorial Guide Available presented by Shown above is a gaming. TruckScience-axle-weight-distribution-software-Scheller-logo-team-1920x386.jpg' alt='Axle Weight Distribution Software' title='Axle Weight Distribution Software' />HistoryeditBefore World War II 1. Citroen Traction Avant had independent front torsion bar suspension and a flexible trailing dead axle, also sprung by torsion bars. The flexibility of the axle beam provided wheel location features like a twist beam axle. The Czechoslovakian Tatra cars, designed by professor Hans Ledwinka in the mid 1. Also in the 1. 93. Volkswagen Beetle incorporated torsion barsespecially their transverse mounting style. Ledwinkas concept had been copied by Ferdinand Porsche, whose successors later had to acknowledge the influence of Ledwinkas sophisticated Tatra models on the Porsche designed Kdf Wagen of 1. Beetle, a post war lawsuit resulting in a DM3,0. Volkswagen to Ringhoffer Tatra in 1. The system first saw military use in the Swedish Stridsvagn L 6. It was used extensively in European cars like Renault, Citron and Volkswagen, as well as by Packard in the 1. The Packard used torsion bars at both front and rear, and interconnected the front and rear systems to improve ride quality. Morris Minor and Oxford from the late 1. Games From Tom And Jerry. Citroen, as did the Riley RM models. The revolutionary Jaguar E Type introduced in 1. Citroen and Morris Minor, and an independent coil spring rear suspension using four shock absorbers with concentric springs. An early application of a torsion bar in an American car was by Hudson Motor Car Company of Detroit who had introduced the innovative front axle flex suspension in 1. Hudson and Terraplane cars and realized for 1. The single torsion bar was mounted through the frame sides behind the rear axle and then attached by arms and links to the front side of the spring U bolt plates. Mp3 Rocket Portable there. Axle flex was discontinued for the 1. Post war the use of torsion bar front suspension was a defining feature of British Morris cars, starting with the Morris Minor of 1. Morris Oxford MO counterpart and the upmarket Morris Six MS, plus the Wolseley badged upmarket variants of the latter two models. The designer of these cars, Alec Issigonis, was inspired by the Traction Avants suspension, although the Morris cars were rear wheel drive and used conventional leaf springs for their rear axles. The Minor used lever arm dampers with its torsion bars while the Oxford and the Six used innovative telescopic dampers. The Minor remained in production largely unchanged until 1. Morris Marina which also used the torsion bar lever arm damper system for its front suspensionone of the last new cars worldwide to be introduced with the system and which remained in production until 1. The OxfordSix platform was developed through several revised series which used Issigonis torsion bar system until 1. Farina Oxford was introduced using front suspension with coil springs, lower wishbones and lever arm dampers. The most famous American passenger car application was the Chrysler system used beginning with the 1. Imperial Crown series, although Chryslers Torsion Aire suspension was only for the front the same basic system longitudinal mounting was maintained until the 1. K car. A reengineered torsion bar suspension, introduced with the 1. Dodge Aspen, introduced transverse mounted torsion bars possibly based on the Volkswagen Type 3 passenger car until production ended in 1. Chryslers M platform. Some generations of the Dodge Dakota and Durango used torsion bars on the front suspension. General Motors first used torsion bars on their light duty pickup trucks in 1. WD trucks. Its first use in a passenger car was in 1. E platform vehicles Oldsmobile Toronado, Cadillac Eldorado, 4. WD S 1. 0 pickups and Astro vans with optional AWD, and since 1. SUVs with 4. WD GMT4. GMT8. 00, and GMT9. Porsche used four wheel torsion bar suspension for their 3. They are also used in the front suspension of the 9. Honda also used front torsion bars on the third generation Civic and other variants built on the same platform including the Ballade and first generation CRX. Weight transfer Draglist. Drag Racing. Weight transfer is a function of car weight, CG height, wheelbase, and acceleration. The only way a suspension adjustment can affect weight transfer is to change the acceleration. Naturally, youre more inclined to wheelstand with an increase in acceleration. To fix this with a suspension adjustment is simply to reduce acceleration. But, this is an example of shooting yourself in the foot. Cod Mw3 Gun Sounds here. You want maximum acceleration, which means that you have to do something about the static weight distribution. You most definitely do NOT want to stop wheelstands with a suspension adjustment. The fraction of static weight on the rear wheels should be no more than L 2. HLwhere L is the wheelbase and H is the center of gravity height. The 2. 5 is the coefficient of friction for a good set of slicks. The static weight bias should be determined with the driver in the car, of course. If the rear weight percentage is greater, wheelie bar loads increase and rear tire loadings decrease. Again, the wheelie is eliminated, but the price is a decrease in quarter mile performance. So, Id suggest that you verify that the static rear percentage is not excessive and then you can start worrying about suspension adjustments. And, when that time comes, Id further suggest that you use a traction dyno Pages 4, 5, and 6 below for your suspension tuning.