Kozy Posted August 2, 2013 Report Share Posted August 2, 2013 Thought I'd post this here, for use/discussion/constructive criticism etc. It's a suspension dynamics calculator, which calculates roll angles and load transfers, allowing you to see how changes to the vehicle set up affect them. The 'magic number' is the Front Lateral Load Transfer Distribution (FLLTD) which is the portion of the total load transfer that is taken by the front axle. Since we know that tyre load sensitivity dictates that a load differential across an axle pair results in a reduction in the total lateral tractive force of that axle pair, we can take this number as an indication of a cars tendency to understeer, with a higher percentage meaning more understeer. http://blackartracing.zxq.net/Load%20Transfer%202.php There are DC2 and MX5 versions in the sidebar. It won't work on Internet Explorer, some mobile devices may not render it correctly and if you have an over zealous AV program installed it might accuse it of being a spam site. I assure you it is not, I wrote it myself and all it is is some HTML, PHP and JavaScript. Quote Link to comment Share on other sites More sharing options...
Tony Posted August 2, 2013 Report Share Posted August 2, 2013 Nice post...... I'm going to have fun exploring this Quote Link to comment Share on other sites More sharing options...
Kozy Posted August 2, 2013 Author Report Share Posted August 2, 2013 Yes I'd love to hear what you think of it Tony. It's by no means comprehensive and I would love suggestions on improvements/corrections if you can think of any. Lot's more to come too! Quote Link to comment Share on other sites More sharing options...
Kozy Posted August 2, 2013 Author Report Share Posted August 2, 2013 Can't edit the OP. Link updated as I've changed the file structure on the server DC2 http://blackartracing.zxq.net/Chassis/Load%20Transfer%202.php MX5 http://blackartracing.zxq.net/Chassis/Load%20Transfer%20Miata.php Quote Link to comment Share on other sites More sharing options...
Tony Posted August 2, 2013 Report Share Posted August 2, 2013 Where are you getting the information for the fields. Quote Link to comment Share on other sites More sharing options...
Kozy Posted August 2, 2013 Author Report Share Posted August 2, 2013 The MX5 data was published on the Fatcatmotorsports tech pages. Should be pretty accurate, that guy knows his onions. DC2 info was found from various threads on the Honda Tech Autocross forum. These figures probably aren't quite as accurate, but should still be pretty close. The front ARB is mostly a guess on that one as it's a horrid shape. If anyone has better info, or has enough data to warrant creating a page for another car then I'm happy to update. Quote Link to comment Share on other sites More sharing options...
Tony Posted August 2, 2013 Report Share Posted August 2, 2013 Do you have a mechanical engineering background? Quote Link to comment Share on other sites More sharing options...
Kozy Posted August 2, 2013 Author Report Share Posted August 2, 2013 I guess so. HND Motorsport Engineering and currently studying with the OU towards a BEng. CAD monkey by trade but aiming upwards. Quote Link to comment Share on other sites More sharing options...
Tony Posted August 2, 2013 Report Share Posted August 2, 2013 Your doing well...... Quote Link to comment Share on other sites More sharing options...
Kozy Posted August 4, 2013 Author Report Share Posted August 4, 2013 New link http://blackartracing.zxq.net/Chassis/LoadTransferDC2.php updated with a faster interface, removing the need to refresh the page each time the user makes a change. Quote Link to comment Share on other sites More sharing options...
Kozy Posted August 19, 2013 Author Report Share Posted August 19, 2013 Here's another one, for brake bias and temperatures. http://blackartracing.zxq.net/Brakes/Index.php Works a bit differently to others that I have seen. The acceleration is a result, not an input, which should more accurately represent reality. Quote Link to comment Share on other sites More sharing options...
Tony Posted August 19, 2013 Report Share Posted August 19, 2013 Excellent work Quote Link to comment Share on other sites More sharing options...
Kozy Posted September 26, 2013 Author Report Share Posted September 26, 2013 More site upgrades, more tools added, changed the name and the hosting and er.. that's about it actually. www.blackartdynamics.com Quote Link to comment Share on other sites More sharing options...
Tony Posted September 27, 2013 Report Share Posted September 27, 2013 Way beyond me if i'm honest but it's great to play with the numbers...... Spot on with the new look i must add. Quote Link to comment Share on other sites More sharing options...
Kozy Posted October 3, 2013 Author Report Share Posted October 3, 2013 First of many articles where I attempt to mash some words together into some sort of explanatory article, to help make sense of the horrid abuse of numbers I have created! This one starts off the chassis articles, I posted this one on this forum a while back but it's been updated with interactive calculations, http://blackartdynamics.com/Chassis_Articles/Tyres_and_load_transfer.php Quote Link to comment Share on other sites More sharing options...
Tony Posted October 4, 2013 Report Share Posted October 4, 2013 It's a good article but still very design engineer side of the fence so hard to fully understand. Quote Link to comment Share on other sites More sharing options...
Kozy Posted October 4, 2013 Author Report Share Posted October 4, 2013 Hmmm, you may have a point there, I've certainly got a very particular way of approaching this sort of thing. Any suggestions on how it could be improved for the non engineering types? Quote Link to comment Share on other sites More sharing options...
Tony Posted October 4, 2013 Report Share Posted October 4, 2013 I don't think it's the sort of thing that can be dumbed down.... Meaning if you were explaining partial physics they couldn't be called "those small grainy things". I think your efforts are very good but the reader would need a level of engineering understanding to fully appreciate the paper. Quote Link to comment Share on other sites More sharing options...
Kozy Posted October 4, 2013 Author Report Share Posted October 4, 2013 Yes that makes sense, something I'll have to make do with I guess. I'll try and make it as accessible as possible but it's never going to be simple. The website is predominantly about the maths involved with vehicle dynamics so if people have an aversion to numbers and algebra then it's going to be a bit of a turn off! Quote Link to comment Share on other sites More sharing options...
Tony Posted October 4, 2013 Report Share Posted October 4, 2013 As you know that's not my arena since i work a different side of the math.. Nevertheless i strive for knowledge and find your work fascinating despite my ignorance...... Keep it up. Quote Link to comment Share on other sites More sharing options...
Kozy Posted October 4, 2013 Author Report Share Posted October 4, 2013 Thanks for the kind words Tony. Really I am only just scratching the surface of this subject myself. The amount I do not know is simply staggering, but I will be using the website to log my learning process and maybe tag a few people along in the process. I've just been having a look at something by someone with a good 20 years experience on me: http://www.dynatune-xl.com/uploads/1/2/6/7/12673370/dynatune_7.0.pdf Just... wow. I can't even begin to comprehend the amount of science involved there! Quote Link to comment Share on other sites More sharing options...
Tony Posted October 4, 2013 Report Share Posted October 4, 2013 It would take a great amount of brain space to store let alone understand all those fields..... Closest i got was a chassis and suspension course at Prodrive and that did my head in. Quote Link to comment Share on other sites More sharing options...
Kozy Posted October 11, 2013 Author Report Share Posted October 11, 2013 Another article, this one based on the performance limitations of naturally aspirated four stroke engines, and calculating your engine's PI number which is a simple as bore, number of cylinders and power, and is comparable across pretty much any NASP 4 stroke piston engine. http://blackartdynamics.com/EngineLimits/Index.php Quote Link to comment Share on other sites More sharing options...
Tony Posted October 12, 2013 Report Share Posted October 12, 2013 Wow........ Is this all your own work because it's one hell of a study.... Quote Link to comment Share on other sites More sharing options...
Kozy Posted October 12, 2013 Author Report Share Posted October 12, 2013 Yep 100% my own work, never seen that concept anywhere else. Quote Link to comment Share on other sites More sharing options...
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