All chassis dimensions and specifications are editable. Universal suspension geometry software race wise by afco. Suspension geometry part 1 camber, toe, caster, kpi, scrub. Suspension tuning is a critical part of getting the ultimate performance package, it is even possible to have a more competitive car then a rival with superior upgrades by having a well balanced set up, which maximises the available grip levels. Fundamentals of vehicle suspension design sae international. Around 1990, a racing friend contacted me to analyze the suspension geometry on a car he had acquired. The car uses a lot of parts from an old vw beetle which puts a limit on how good the. Smitty describes the design principles for the chassis of a race car. The chassis movement control allows you to raise and lower the chassis and also rotate the chassis by moving the mouse or your finger side to side. Information is presented in a manner that enables easy learning and retention. Some software includes kinematic capabilities that simulate vehicle dynamics using the designed suspension. Vsusp no longer supports any version of internet explorer. The performance trends suspension analysis software illustrates the extreme movement of the roll center on a strut car.
As before, this produces greatly increased jacking, and most designers would find this too disadvantageous. In this article well cover what we consider to be the three most important elements. This means that the software is easy to use with a practical approach. Apr 01, 2020 speedwiz suspension pro has all the car suspension calculations and suspension simulations you need to build and modify great cars, trucks, motorcycles, and boats.
This is the fourth in the series of videos developed for ucis racecar engineering program. It includes graphs and suggestions for changes to your geometry. More information including a free download of the users manual is available from the tonyfoale web site. Apr 19, 2005 it includes graphs and suggestions for changes to your geometry. Changing one thing at a time is the first rule you learn in motorcycle setup, but. Some of the teaching aids used to help students learn include. For windows 7, 8 and 10 with opengl see the faq for more details faq for more details. The best it and service management tools are the ones that work right out the box and naturally fit into. As well as creating a 3d cad model autodesk inventor prof 2012 of my chassis design i am looking to create a simulation of the suspension geometry and if possible calculate the geometry values. Dont let the low price fool you, this is professional level software which is used by many top level race teams and suspension tuners. This geometric analysis can be done with pencil and paper on a drawing board or with simple physical models, but is more commonly analyzed by the means of specialized software. Front view suspension geometry calculatorsimulator initializing.
I havent read the other books by carrol smith or milliken yet, but i was able to design a set of front upper and lower control arms for a single seat buggy that me and 3 of my friends built and raced with 17 of travel. It is based on chapter 7 of the book chassis engineering by herb adams isbn 1557880557. Basically i dont have a project and im not trying to do anything at the moment except learn as much as possible about suspension kinematics and design. Suspension geometry is the foundation of vehicle performance from which highconfidence suspension components and tunings can be developed. Chassis master is easy to set up and calculates all possible ic locations, rise, squat, corner weights, center of gravity and even automatically adjust to changes in ride height or tire size.
Antipitch is the name given to a suspension geometry, front and rear that prevents pitch under braking. Krishnakumar from iitm engineering design vehicle dynamics. Supact motorcycle geometry software is developed in a racing environment. Wheel alignment and geometry settings are fundamental to vehicle road holding, cornering performance, driving pleasure and safety. Suspension design determine loads to properly design the suspension components the. As a base point, in order to calculate the standard suspension geometry accurately, i used chris gibb. Here are the software programs that are most appropriatefor the circle track racer. Suspension systems must support both road holdinghandling and ride quality, which are at odds with each other.
Its many automotive suspension calculations and suspension graphs make it easy to find out what you need to know. Over 100 screen projections videos special fixtures and simulators actual suspensions various chassis components suspension geometry software. Easy and fun to use, suspension pro will give you results immediately with no. If you need assistance on a step, just click on it for more information.
Suspension geometry an overview sciencedirect topics. This screen shot shows a double a arm system, but the software also works with strut suspensions. The upper ball joint or strut support bearing on a front. Software for designing and analyzing suspension systems and geometry. For a more exhaustive list, or to find materials that fit your specific needs, search or browse geometry or instructional packages and games in the software area of the forums internet mathematics library. Racewise provides the technical understanding of suspension and tire performance that racers must have in order to make no guesswork decisions. Discusses the use of computers in suspension geometry analysis, with programming techniques and examples of suspension solution, including advanced discussion of threedimensional computational geometry applied to suspension design. Analyze static suspension forces the supact geometry is developed in a racing environment. Tilting suspension system also known as leaning suspension system is not a different type or different geometry of construction, moreover, it is a technology addition to the conventional suspension system. Jul 23, 2017 smitty describes the design principles for the chassis of a race car. Motorcycle suspension setup software tony foale ebay. Suspension component design continues to move toward mass and cost efficient designs with high levels of stiffness being essential to achieving design requirements. A trophy trucks suspension is designed for maximum suspension travel and most are able to travel as much as 36 to 40inches.
Newer commercial software has kinematic features built in that simulate road conditions, or will calculate pickup points based on. At some point you will want to enter your own suspension geometry data or even just just view the current model in more detail. Smitty describes the principles of suspension design. At the racewise dirt track chassis school, students learn how suspensions. Aftermarket components like yokes and linkages can be measured. Aftermarket manufacturers make kits that retrofit an existing radius arm suspension to a parallel fourlink design and use coil springs and a track bar to center the axle. The compatibility of the aarms and 3link suspension with the detailed parameters can produce exceptional results in the graphs of camber and caster variations, toe angles,ackermann geometry, proper flow of forces from chassis. In part 2 we are going to be talking about the most basic types of geometry changes that we can employ in order to change the natural characteristics of our bikes. Lotus software allows students to design and simulate their fsae baja vehicles. Autoware autoware inc front suspension geometry software. This is a unique opportunity to get professional software at a knock down price. Two steering geometry angles, sai and steering radius, are built into the steering knuckle and are nonadjustable.
Aug 29, 2007 basically i dont have a project and im not trying to do anything at the moment except learn as much as possible about suspension kinematics and design. Camber matters optimizing track performance for strut. Getting the right wheel alignment and geometry recipe is critical, but must be done in a way that it complements the mechanical suspension specifications and vehicle usage. Suspension should be designed in a way which would help in making a vehicle provide resistance to all impact loads. It is based on chapter 7 of the book chassis engineering by herb adams isbn 1557880557 available from society of automotive engineers. For windows 7, 8 and 10 with opengl see the faq for more details faq for more. Stop guessing and start winning learn the facts of front suspension geometry with this informative cdrom computer software. Speedwiz suspension pro has all the car suspension calculations and suspension simulations you need to build and modify great cars, trucks, motorcycles, and boats. The supact geometry is developed in a racing environment. Jan 29, 2018 suspension geometry part 2 roll center. If you need assistance on a step, just click on it. Car design tools for chassis, suspension, aerodynamics.
One of the most common questions we get about suspension setup and tuning is how 4link geometry affects the performance and handling of a vehicle. Explains in detail the direct and iterative solutions of suspension geometry. Because internet explorers maximum url length is shorter than other browsers, your project cannot be saved properly in this browser. Front view suspension geometry calculatorsimulator. This kind of suspension system mainly consists of independent suspension e. Lotus engineering suspension analysis lsa, the commercial version of software from lotus engineering in the u. Drawing templates, 3d cad, fea, cfd, suspension geometry. Oct 01, 2007 the basics of suspension geometry, as well as a diagonally identical wheelbase, spring rates, and wheel offset, must be adhered to if you want your car to handle well.
Im doing a chassis design project for my major project in my degree 2nd year. In the real world, defects in sai and steering radius often go unnoticed if the vehicle is driven on interstatestyle highways and not through turns on city streets. Suspact, motorcycle geometry software, sbk, motogp, moto2. Racewise provides the technical understanding of suspension and tire performance that racers must have in order to. Susprog3d is the premier kinematic suspension design and analysis tool. Suspension geometry part 1 camber, toe, caster, kpi.
I really just wanted the program so as to help me understand specific inputs and outputs. This involves placing the force application points g and h on the centre of gravity. Software for auto racing and high performance cars data acquisition systems new and used engineering services and live seminars on performance and racing technology all types of tech info on racecar engines, chassis and suspension setup for road. Trophy trucks are all custombuilt from steel tubing. This is the fifth in the video series developed for ucis racecar engineering program. Spec is software for tuning motorcycle suspension and chassis geometry. Motospec has been designed for racing use, with a simple interface and clear outputs, to assist motorcycle tuners and race teams make quick and knowledgeable decisions.
Diyguru presents a certification program on lotus suspension analysis. Rear suspension geometry this is a software package that addressesthreelink suspensions and late model fourlink floaterstyle. This course emphasizes the basic tenets of suspension design enabling strategically important product trends. Afco rwfront suspension geometry software race wise. This is a basic get you going tutorial, using the registered susprog3d software. Easy and fun to use, suspension pro will give you results immediately with no tedious setup and learning chores. How many parameters change when you only change the shock length. Roll center calculator this is a simple twodimensional front suspension layout program. First, lets start by looking at the suspension movement and the tools available to make your life easier.
One common trick, to make the calculations easier, is to assume that the chassis rotates about a point at ground level or level with the bottom wishbone chassis pickups on the centreline of the car, regardless of where the geometric roll centre is. Autowares racing and performance tech site software for auto racing and high performance cars data acquisition systems new and used engineering services and live seminars on performance and racing technology all types of tech info on racecar engines, chassis and suspension setup for road. In this episode, i summarize the design of the suspension. The use of the software served as a valuable tool in the selection of the proper metal alloy, and the geometry of each part. Some suspension design software packages provide 3d visualization of suspension geometry and movement, and enable the designer to change pickup points and other points in space before reanalyzing the design. From this i could generate drawings to suit the mcsorley 442 dimensions. This list contains some of the best geometry software. The tuning of suspensions involves finding the right compromise. Suspension is the system of tires, tire air, springs, shock absorbers and linkages that connects a vehicle to its wheels and allows relative motion between the two. Introducing optimumkinematics, software that makes computeraided suspension design and analysis fast and convenient. Spec is software for tuning motorcycle suspension and chassis geometry motospec has been designed for racing use, with a simple interface and clear outputs, to assist motorcycle tuners and race teams make quick and knowledgeable decisions.
The basics of suspension geometry, as well as a diagonally identical wheelbase, spring rates, and wheel offset, must be adhered to if you want your car to handle well. Stop guessing and start winning learn the facts of rear suspension geometry with this informative cdrom computer software. Suspension design software is invaluable in car or truck design as it does the heavy lifting when it comes to the many iterations of manual calculation that are usually. Suspension system design excellence follows the basic laws of physics using design synthesis techniques, a methodical process for suspension geometry development. Analyze parameters that effect steering and handling of the motorcycle. Allows steer, roll and bump or rebound suspension movements.
Automotive suspension geometry describes the kinematic movement of a cars suspension based on a theoretical analysis of measured or designed points. What are the best online courses for learning vehicle. Now you can get all the racewise chassis school material in an easytouse software program for your home computer. As i said in the first part of this series, the words geometry changes often strike fear into the hearts of many riders thinking about making changes to their setups. Chassis master software tim mcamis performance parts.
Suspension design software is invaluable in car or truck design as it does the heavy lifting when it comes to the many iterations of manual calculation that are usually needed to find the ideal geometry. Basic suspension geometry this is a basic get you going tutorial, using the registered susprog3d software. Racewise rwfront front suspension geometry software. Use the model you built in the previous workshop suspension system i to inspect the toe angle that the wheel exhibits throughout its vertical travel of 80 mm in jounce and rebound. Basic suspension geometry lessons rod and custom magazine. Pressing the edit button immediately switches to edit mode listing more details about the dimensions of the model and allowing you to alter the model by dragging any of the tether points. Calculate and compare the geometry setup of up to 5 motorcycles at a time. Design of formula sae suspension theory in practice. A variation on the radius arm suspension is the parallel fourlink, shown in the figure above. Javascript is disabled or scripts are not loading javascript is required in order to use this simulator. After reading carroll smiths chapter on suspension geometry and a couple other books.
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