Cdot bridge geometry manual chapter 2 overview april 2017 page 2 of 5 commonly but not always coincident with the profile vertical control line. A brief history of girder forks different forks for different folks. Dynamic analysis of double wishbone front suspension systems on. Chances are weve seen your scenario before and can help getting you going. A motorcycle fork connects a motorcycles front wheel and axle to its frame, typically via a yoke. Girder is the award winning, home, office and industrial automation software that allows users of all skill level to make advanced scripts and macros to automate many functions both on the computer and around the house or office. Druid forks are recognizable as looking like a bicycle fork with a strengthening brace at the front and a couple of coil springs behind. I then built a rough prototype to test some ideas on geometry and. Layout type in girder system projects mdx software. Oem aftermarket brake calipers, attachment of various brake calipers is possible. Girder front ends have enormous potential for wobble, as they throw good suspension design out the window for the sake of appearance. John brittens racebike worked very well with a modern interpretation of the girder frontend. A column may consist of 5 to 10 plates connected by means of workshop welds.
Executive choppers was formed in 2003, but owner bill holland has been customizing and designing choppers since the 1970s. Plate girder and tub girder bridges, for example, are often the preferred solution for direct connectors in highway networks. Racewise rwfront front suspension geometry software. The roll center calculator lets you input, view, save, analyze and compare either double a frame or mcpherson strut front suspension geometry. You can convert data formats, assign geometry, shift and swap seismic traces, filter and scale seismic data, and more. Now that your bridge is in place what are some of the waysthat you can modify its geometry. Honeycomb girder launching gantry is patent product made by zzhz, mainly used for highway bridge construction with full span method. Laurence smiths girder new front end design originally posted by brady i always wondered why road bicycles used such steep rake angles, id prefer a shallower and more stable front end for a bicycle. For windows 7, 8 and 10 with opengl see the faq for more details faq for more details.
Missouri state university engineering 16,215 views. The options for entering your geometry specs include. Racewise provides the technical understanding of suspension and tire performance that racers must have in order to make no guesswork decisions. Girder can even be run without its frontend application present at all, only serving the web api routes. I was wondering why girder forks arent seen on any sports and race bikes.
Jan 17, 2010 10 of trail is annoying as all getout. Compared to springers or telescopic, girder front forks are both lighter and stronger, and relatively inexpensive to build or buy. Girder forks were stretched 22 inches for the profile thee darkside wanted. In addition to awesome looks, girder strength comes from its triangular shape. The kneeslider looks forward to hearing about the performance of jasons hard work being adapted to the r1. Cornacchia, lightweight of a cross beam for commercial. I began by using tony foales ffe suspension software to investigate. Column elements are displayed in the drawing below the drawing was prepared with. A girder front end is an excellent choice for a custom bike build.
Quickly and easily see the affect movement has on your suspension setup and adjust on the fly using the drag and drop editor. Probably the earliest example of the parallelogram type is the druid, patented posthumously in 1917 by the estate of one arthur drew. I dont like the front end flop at low speeds, but i like the control and smoothness at cruising speed that you get with longer trail. On most bikes, the steering axis is set at the same angle as the fork. Special and unique honeycomb girder, high stiffness, low deflection and high wind resistance. 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 the url.
To begin defining a girder plate, select the option from. Lets look at some of the different ways that i canmodify this bridge. If you look on the rma website you will see the front end accordingly. See more ideas about forks design, cool bikes, bike. Span of the gantry girder m effective length of its compression flange m spacing between wheels on gantry girder m crane capacitylifting load tons unfactored. The types of girder forks found on motorcycles fall broadly into two main categories.
I have been running conventional front ends and springer front ends on my choppers for a long time like the springer front end, but just a little heavy, i had a problem with the trail on one of my bikes and my friend told me about executive choppers, that had adjustable girder front ends, it solved the problem but it was the best front end i. Girder can even be run without its front end application present at all, only serving the web api routes. Here at slims fab we fabricate on all motorcycles,cars,trucks and your special project slim 951 217 8814. Donnie smith girder front ends from chopper surplus. Girder front ends are much more than for strength and looks. The motorcycle front end setup app web form im working on is coming along, and ive hit a. Integral abutments are used to eliminate expansion joints at the end of a bridge.
The modern harley springer front end is essentially a development of the first leadinglink design but with progressive. I have been running conventional front ends and springer front ends on my choppers for a long time like the springer front end, but just a little heavy, i had a problem with the trail on one of my bikes and my friend told me about executive choppers, that had adjustable girder front ends, it solved the problem but it was the best front end i ever used on a bike, i have multiple bikes with. This front end is a copy at least the design from a company called rma billet. Trailing arm suspension explained with jake burkey rock rods tech duration. My only suggestion is to make the software more simple and user friendly. Girder automation software for home automation and. The new spitfire girder front end is made from the highest quality american dom tubing. Girder made by promixis, girder is the award winning home and industrial automation software that allows users of all skill level to make advanced scripts and macros to automate many functions both on the computer and around the house or office. They are made completely to customer specs,width and length. The girder front end is one of the earliest types of both bicycle and motorcycle front. The web api is mostly used to interact with resources that. A brief history of girder forks classic motorcycle repair.
As with all racing vehicles, correctly and accurately set frontend geometry is vital to get the most out of any kart. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. I then built a rough prototype to test some ideas on geometry and construction, the bike i used was. Pdf dynamic analysis of double wishbone front suspension. This is a scratch built girder front end made here at the farm. Jun 23, 2017 the most stable front end and the easiest front end to build. Development of threedimensional finite element software for.
Girder has been automating everything from homes, computers, churches, offices, dod to tv studios since 1998. Thank you for the effort of making this free software or tool. I dont know a lot about geometry so correct me if i am wrong it seems like it would mess up the entire bikes geometry causing a bike to be designed around the front end. Susprog3d is the premier kinematic suspension design and analysis tool. I began by using tony foales ffe suspension software to investigate the working dynamics of how girders function. The potential presence of skewed supports is a further source of complexity. If the best practices guide for promises actually makes sense to people, i may want to expand it with additional code samples and distribute it via a blog post, girder docs, or something. On all circle track cars, stock cars to modifieds, when a wheel is cambered, the tire generates a lateral force known as camber thrust. Front end is designed to preprocess single shot record. The design of a motorcycle featuring fully independent. This is a front end, actual program is available with the software. Rake, trail, wheelbase, center of gravity, antisquat, and so on are all. Motorcycle front end geometry explorer webform app.
Imagine a massproduced and affordable modern sportbike with little dive in the frontend. Girder is a graphical user interface that allows easy access to devices like lights, security systems, home theater. There are two distinct approaches to defining layout. Come see why his work has been featured on television and in national magazines. Donnie smith makes a quality girder front end among other as well as denvers choppers for a well build springer front end. Girder front ends are much more than for strength and. Ffe software or front suspension software can analyse the kinematics of most. These pictures show a front end made for a customers 88 yamaha virago, using his original rear shocks. Comprehensive design example for prestressed concrete psc. The chassis always returns to the static position when releasing the mouse. Finite element analysis software used to calculate safe bearing loads of all. If i click the bridge and thats probably the first thingi should teach you is how to select the bridge. For me personally as custom bike builder, most important is the trail on the front axle.
Point 2 is the end point of a plate girder top point of the column, positioned in the upper part of the column in the middle of the back flange, and point 3 defines the incline of the upper part of the column for example, it may be the point which determines the roof ridge in a frame. If you really want that look, go for a hd springer front end, at least theyre functional. Use promises more consistently and thoroughly issue. They are available in 2inch length increments from 2. Automobile steering feeling is often considered to be the most important among driver feedbacks, see. Front suspension geometry pro incredible, amazing and astonishing, you have to see it to believe it. Pdf the design of a motorcycle featuring fully independent. Several batch commands are available, such as data resampling, trigger delay correction, vertical stacking. Front suspension ffe software motochassis by tony foale. Hossack motorcycle suspension system vs telescopic fork duration. This is what i chose when building my hardtail sportster. Race teams keep track of setup and geometry changes using some form of software that calculates. Yamaha r1 aluminum girder front suspension from suspensionsmith of australia by paul crowe the kneeslider on 10172011. Rear suspension geometry is your car loose and cross weight nor springs will fix the problem.
Center shockspring with adjustment for more or less tension. What the important numbers mean, how to change them, and why you would want to. The particularity of this type of front end is also that the length of the forks and the rake in the forks or frame does not determine how well a girder works because the suspension part is always the same and keep working as intended. I like longer trail around 57 but im going with a lower number 3 this time so the front end will feel nice and light.
Girder automation software for home automation and commercial. Power comes courtesy of a 117cubicinch ultima vtwin fitted with a snaked exhaust system bent by thee darkside. Handling, grip, tyre wear and even acceleration can be adversely affected by poor settings caused by neglect, damaged worn components, and most commonly by inaccurate or inadequate alignment methods or technique. Antipitch is the name given to a suspension geometry, front and rear that. Note that for some suspensions, such as a twist beam type, the modelling of. It will also handle head stock mounted forks like girders and leadingtrailing link. Comprehensive design example for prestressed concrete psc girder superstructure bridge design step 7 design of substructure design step 7.
Layout type in girder system projects the first step in girder system projects is defining the framing plan and basic slab dimensions. With a telelever, the trail and castor angle rake increases during braking instead of decreasing as with traditional telescopic forks. Motorcycle front end geometry explorer webform app discussion in some assembly required started by sebwiers. Now you can get all the racewise chassis school material in an easytouse software program for your home computer. A brief history of girder forks classic motorcycle.
Development of threedimensional finite element software for curved plate girder and tub girder bridges during construction. As with all racing vehicles, correctly and accurately set front end geometry is vital to get the most out of any kart. This camber thrust can work with you or against you in the corners depending on your front end alignment and suspension geometry. Stop guessing and start winning learn the facts of front suspension geometry with this informative cdrom computer software. Throughout this manual, the term girder line is used in a generic sense to mean any longitudinal. Timesaving geometry generation feature for laying out parallelconcentric girder systems, including those with variable horizontal curvature and skewed supports flexible nodal coordinate input feature for accomodating complex girder system framing plans and roadway layouts. This flexibility in fabrication, however, presents challenges for structural engineers because of the difficulties associated with accounting for combined bending and torsion with curved geometry. Executive choppers is home to the harmanholland internally sprung girder front end, which brings the classic harman design into the modern age. As you move the chassis notice the variations are displayed within the calculator. Span of the gantry girder m effective length of its compression flange m spacing between wheels on gantry girder m crane capacitylifting load. Handling, grip, tyre wear and even acceleration can be adversely affected by poor settings caused by neglect, damaged worn components, and most commonly by inaccurate or. New high tech girder front end at cyril huze post custom. All of the parts on this front end are cnc machined for a precise assembly.
Parallelconcentric layout can be used when girder spacing does not vary along the bridge. Adjustability for front suspension and steering geometry. I built this bike to show my custom powder coat work its all powder coated no paint chameleon teal changes from blue to green and purple. While it may have an exposed spring near the triple clamp, a springer fork is distinguishable. For instance, bikesim software 14 is a motorcycle dynamics. Laurence smiths girder new front end design i know its long but really worth reading. Development of threedimensional finite element software. Back in the 70s they were haught sheit, but a lot of guys wound up on the asphalt because of them. Suspension geometry an overview sciencedirect topics. How to install a springer front end honda shadow bobber. Length measures from bottom of the steering neck to center of the axle. Or, maybe you are looking for a little more forward bite. I then built a rough prototype to test some ideas on geometry and construction, the bike i used was an fzr400 frame with a 98 cbr 919 motor for extra go that i had built some time ago.