There is no comparison to any other 4 link software available. Its a complicated concept, but basically, dw link uses dual links to create a specific axle path around a virtual pivot point. Similar suspension systems to the dwlink have been used by schwinn, fisher and karpiel. Stop guessing and start winning learn the facts of front suspension geometry with this informative cdrom computer software. The dw link system has also been designed to minimise pedal feedback caused by suspension travel. Dave weagles dw link suspension system may be the single most significant advancement in bicycles since the advent of suspension in the early 1990s. Upper lateral link, lower reversed aarm, twin trailing links rear the classis 60s sports and racing car rear suspension. This created a blank slate and allowed me to design my own adjustable 3link rear suspension. On what operation systems does linkage run, is there a mac or linux version. You enter heights above the ground and distance ahead of the front axle for up to 6 holes for all 4 brackets for your car, or any number of cars. The dwlink is a subset of the common fourbar system used widely in bicycle suspension. Many people liken the performance of dwlink with vpp designs. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. Bottom line, suspension kinetic and kinematic design exist to control the distribution of load through the 4 wheels, minimize load variation, and control the wheels position in 5 degrees of freedom.
Looking for online definition of dw or what dw stands for. He worked on the design team at iron horse bikes too. Used by many of the best teams in drag racing, chassis master is easy to set up and input information. You can also use this function to compare front and rear suspension although be careful as only the model at the front of the drawing is saved within. Aug 29, 2007 bottom line, suspension kinetic and kinematic design exist to control the distribution of load through the 4 wheels, minimize load variation, and control the wheels position in 5 degrees of freedom. A linkagedriven single pivot design still uses an uninterrupted. Few are following 1 solid worksfor static design, can calculate the dimension of members a arms springs free length, joints positions and orientations. Similarly the dwlink is designed with an antisquat curve which provides a stable pedalling platform at the start of the suspension travel which gradually decreases as the bike becomes more active. Typical rear suspension screen, here analyzing an angled 4 link rear suspension and driveshaft movement and u joint angles. For windows 7, 8 and 10 with opengl see the faq for more details faq for more. Calculates all possible instant center locations plus percentage of rise and squat.
Rear suspension design transportation engineering general. Raymond obviously knows far more about suspensions than me, but i can personally attest to the performance of the ibis mojo. But, for now, well focus on the threelink fabrication. There are many twinlink suspension designs on the market, such as the popular vpp and dwlink for example, but all feature an instant centre that moves significantly through the travel, changing the properties of the suspension. Squat is defined as the tendency of rear suspension to compress under acceleration. Optimization of offroad vehicle suspension system is one of. Jul 29, 2014 test ride as many bikes as you can and make sure the shop sets up the suspension for your weight otherwise the test ride is useless. Racewise provides the technical understanding of suspension and tire performance that racers must have in order to. Its hard to achieve, but if you can measure your bike you can modify pivot coordinatesbike geometry later. You can get a long way without knowing specific tire data, and design a suspension that wont screw ya, and is going to be tunable enough to get. Mountain bike rear suspension may appear to come in a baffling array of different designs. Dave weagles dwlink suspension system may be the single most significant advancement in bicycles since the advent of suspension in the early 1990s. If you are set on a 2link, make it just like the trailing arms found under a mid60s chevy pickup.
The 4link is a relatively complex rear suspension that is very sensitive to adjustments. This allows antisquat and antirise levels to be optimised throughout the travel. Famed suspension designer dave weagle s dwlink was a precursor to maestro, and weagle was locked in a legal battle with giant for about a year before eventually dropping the lawsuit. How your bikes suspension design affects its performance on.
The fourbar system has been used on mountain bikes since the early days of suspension. Vehicle suspension design includes a number of compromises to provide good leveling of stability and ride comfort. Susprog3d is a complete 3d software package for the design, setup, evaluation and visualization of race and road car suspension systems now with support for 30 different suspension types. There are a number of riders here who have upgraded to the higher end ih bikes and been very happy with them. Complete graphs and reports are included, and several new. Now you can get all the racewise chassis school material in an easytouse software program for your home computer. Apr 01, 2008 chevy did build trucks in the 60s and 70s with a two link that worked nascar rear suspensions are based on this design, but it was engineereddesigned to do so. What is best software for designing suspension systems. Rear suspension analysis for new ibis mojo 3 with the dwlink suspension. 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.
Linkage mechanism designer and simulator tutorial 1 youtube. The links need to flex, and the leading ends need to be as close together as possible to function without bind. The ultimate guide to mountain bike rear suspension systems. So, any suspension design that has the wheel mounted to a swingarm, with a link on either side of the swingarm attached to the frame uses the idea of the instant center these are designs such as fsr, dwlink, switch infinity, orion or vpp. Dave weagle ends patent lawsuit versus giant bicycles. In designs like the dwlink used by ibis, the rocker links rotate in the same direction while brands like santa cruz use variations of the vpp. Jun 27, 2018 famed suspension designer dave weagles dwlink was a precursor to maestro, and weagle was locked in a legal battle with giant for about a year before eventually dropping the lawsuit. Design and manufacture of an adaptive suspension system a major qualifying project report submitted to the faculty of worcester polytechnic institute this report represents the work of wpi undergraduate students submitted to the faculty as evidence of completion of a degree requirement. Design and manufacture of an adaptive suspension system. In terms of suspension design, this is usually referred to as chain line. The vpp is designed to improve the pedalling performance of rear suspension, while retaining the ability to actively absorb bumps. On may 18, 2010, dave weagle, the creator of the world champion and internationally acclaimed dwlink suspension, and the delta system was awarded us patent 7,717,212 for his split pivot concentric dropout pivot suspension technology. In fact, the suspensions geometry needs to be checked with design analysis software.
The dwlink suspension is such a joy to ride with such small bump compliance, big hit performance, and yet climbs like a goat. The rear triangle remains one solid stiff piece but with the. I cant believe im going to for once not bust dinos balls on an iron horse, but. Chassis master software tim mcamis performance parts. David weagle technical director wintergalactic inc. A link length change of 1 or a link angle change of 5. The old model remains at the back of the drawing, you can use it as a guide when making adjustments to the layout or visually compare how the changes will perform when the suspension is in motion. A few suspension systems vpp, dwlink, itrack are capable of having an. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. A rear triangle, without pivots, is connected to the front triangle by two links. A beginners guide to mountain bike suspension design.
The suspension analyzer does a complete 3d suspension analysis, including bump steer, ackerman, caster gain, anti dive, tire scrub, camber gain and much more. If the bike has rear suspension, then the extra weight carried by the rear. The dwlink is the only design on the market that is able to control unwanted bob and still remain active in more gear combinations than any other design. The antisquat used in the dwlink system is achieved by a minimisation of torque about the centre of mass. Rear suspension design three link four link two link.
Jun 17, 2009 in fact, the suspensions geometry needs to be checked with design analysis software. When compared side by side, these links are almost twice as thick as stock. Why dave weagles mtb suspension designs are so prolific. The dw link uses antisquat to eliminate suspension bob. The 4 link calculator lets you input, view, save, analyze and compare your 4 link rear suspension geometry. Track all chassis information including corner weights and center of gravity. Finally, the virtual pivot point vpp is a different take on what we saw in the dw link. There are a number of software to design a suspension system. Upper and lower virtual aarms, steering link front upper and lower virtual aarms, toe link rear as used on some mercedes rear. Adjustable 4link suspension system is infinitely adjustable with 18 inch increments allowing hundreds of instant center options. Pdf optimization of suspension system of offroad vehicle. Dec 19, 2015 in this video i will cover the fundamentals of rear suspension bikes.
Racewise rwfront front suspension geometry software. Poor design on gms part, as this vehicle has had tons of problems already and only has 39k miles. Split pivot is the worlds first patented concentric drop out pivot suspension system. Linkage kinematics basics of antisquat and pedal kickback. When designing or tuning a 4link, it is important to understand the relationship between link lengths and angles and how the relationship affects roll steer. Theres a lot of creative marketing in the cycling world, and theres some suspension physics claims that make me cringe. Apr 20, 2016 mechanism design software 148,449 views. How to draw 3d letter m drawing with pencil awesome trick art. In this video i will cover the fundamentals of rear suspension bikes. The dwlink uses antisquat to eliminate suspension bob. We also manufacture accessory products such as cats eye tire pressure.
Back in 2005 or 2006, after the design of the mojo was done, i looked at dwlink in relation to other suspension platforms out there. On may 18, 2010, dave weagle, the creator of the world champion and internationally acclaimed dw link suspension, and the delta system was awarded us patent 7,717,212 for his split pivot concentric dropout pivot suspension technology. Susprog3d is the premier kinematic suspension design and analysis tool. True to moog design, they identified a problem with the stock design and improved it, adding zerk fittings for grease and beefing up the diameter of the link itself. Interior designs premier management software designer link. What are your recommendations for the best suspension. 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.
How your bikes suspension design affects its performance on the trail. The lawsuit, which was filed by dave weagle in may 20, was based on three patent infringements and breach of a joint development agreement. Arguably the most beautiful derivation of the dw link, is that of the new ibis ripley with their eccentric bearinginabearing pivot design, and i have heard that they ride as good as they look. Popular examples giants maestro suspension, ibis dwlink suspension, santa cruzs vpp when compared to a singlepivot design, twinlink suspension increases the number of pivots from one to four, allowing designers flexibility to modify the position of the instant centre, and thus the suspension characteristics at different points of. Pivot uses dw link suspension well let you guess what dw stands for on all its. The vpp, 4 bar, maestro and dw link are all great designs and extremely similar that you really cant go wrong with any of them. Quickly change instant centers without affecting pinion angle, preload, or wheelbase. Computer program to simulate and analyze rear suspension 4link setups for instant center, pinion angle and driveshaft angle change, antisquat %, and more for drag racing. The antisquat used in the dw link system is achieved by a minimisation of torque about the centre of mass. Suspension dw link vs split pivot vs maestro rotorburn. Our products include cabmate cab suspensions, steerable and nonsteer lift axles and vocational chassis suspensions.
The dwlink system has also been designed to minimise pedal feedback caused by suspension travel. Mountain bike rear suspension may appear to come in a baffling array of different. Dw is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms the free dictionary. I can agree with dino and others that the mkiii is a solid trail bike, and the dw link a very good suspension design. Back in 2000 and 2001, when i really was heavily into developing dwlink, i spent more time than i should have posting on the mtbr forums about the.
Notable brands that use dwlink include pivot and ibis, and the design is known for a solid pedaling platform with more antisquat early on in the travel. If you make you own, make sure you pay attention to the design. The program will work you through a stepbystep process of picking key points on. The lawsuit, which was filed by dave weagle in may 20, was based on three patent infringements and breach of a joint development agreement according to bicycle retailer, in a brief 72word statement, giant said, dwlink has withdrawn its claims of patent. Chevy did build trucks in the 60s and 70s with a twolink that worked nascar rear suspensions are based on this design, but it was engineereddesigned to do so. The lawsuit pitting dave weagles dwlink against giants maestro suspension design has been permanently resolved. Its a complicated concept, but basically, dw link uses dual links to create a specific axle path around a.
Four link suspension drag race four link suspension use spherical rod ends for strength and extreme adjustability. Famed suspension designer dave weagles dwlink was a precursor to maestro, and weagle was locked in a legal battle with giant for about a year before eventually dropping the lawsuit. Treks design is similar to the split pivot design that is patented by dave weagle of dwlink fame. Widely heralded by professional racers and everyday riders for its performance traits, the dw link actually accomplishes what other suspension systems have pretended to do for years. Autoware autoware inc front suspension geometry software. Jan 26, 2016 there are a number of software to design a suspension system. Pivot uses dw link suspension well let you guess what dw stands for on all its bikes. The dwlink suspension design was used to win six elite level uci downhill world championships from 2005 to 2007, the highest contested level of the sport. Rear suspension design surestick mechanical 9 feb 09 09. Linkage software provides this shock compression curve on the tab called geometry. For windows 7, 8 and 10 with opengl see the faq for more details faq for more details. Simultaneously engineered antisquat and wheel rate curves are the mathematical formulas that make dwlink the worlds most efficient and tractionaiding suspension system. This unique layout aligns suspension forces in the most efficient layouts possible to enable frame designs with industry leading strengthtoweight ratios and stiffness. Dec 04, 2014 back in 2005 or 2006, after the design of the mojo was done, i looked at dwlink in relation to other suspension platforms out there.
How your bikes suspension design affects its performance. The file for the tension link bike has been uploaded to the linkage database so people can download it and modify it as they wish all of the critical frame dimensions and suspension design parameters can be viewed in the linkage program. Widely heralded by professional racers and everyday riders for its performance traits, the dwlink actually accomplishes what other suspension systems have pretended to do for years. The lawsuit pitting dave weagles dw link against giants maestro suspension design has been permanently resolved. Premier management software for interior designers provides easytouse features that quickbooks is missing and the convenience of onetime data entry. I can agree with dino and others that the mkiii is a solid trail bike, and the dwlink a very good suspension design. However, thanks to the constant technological advancements, the multilink suspension has moved from the. Nov 04, 20 the virtual pivot point or vpp and the dw link are variations on the four bar, and both fully independent systems use twin links to isolate the rear end. Acceleration efficiency, traction on climbs and in corners, bump absorption, pedal feedback, braking influence, frame strength and stiffness, frame geometry and frame manufacturability are all factors that must be considered during the development of a suspension system. Sep 04, 2008 back in 2000 and 2001, when i really was heavily into developing dw link, i spent more time than i should have posting on the mtbr forums about the finer points of suspension design.
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