tag:blogger.com,1999:blog-4650400550712092979.post99785592524154910..comments2024-03-25T12:38:12.492+01:00Comments on Linkage Design: Slippery Roots (WM)Antonio Osunahttp://www.blogger.com/profile/10075236093614144240noreply@blogger.comBlogger11125tag:blogger.com,1999:blog-4650400550712092979.post-84579817378270698612012-12-10T12:19:23.232+01:002012-12-10T12:19:23.232+01:00The results are very close between the Jeronimo an...The results are very close between the Jeronimo and the Rocky Mountain, but it's easy to see how the suspension improves a little when it loose traction. It's a bit weird because nobody really wants to loose traction, but it's just another consequence of having some pedal Kickback.<br /><br />Best Regards,<br />Tony.Antonio Osunahttps://www.blogger.com/profile/10075236093614144240noreply@blogger.comtag:blogger.com,1999:blog-4650400550712092979.post-32830951922348592452012-12-10T06:46:12.497+01:002012-12-10T06:46:12.497+01:00Just looking at these results closely now. How int...Just looking at these results closely now. How interesting they are. Wheel slippage on slippery surfaces (roots) seems to immunize the drivetrain against the expected kickback on the higher AS bike (Jeronimo). Even more surprisingly, the breaks in traction that occur while riding that bike over the slippery roots are (slightly) less pronounced than those we see on the lower AS bike (Rocky Mountain MSL). Both bikes break traction under power but it appears traction is more easily restored for the high AS bike. I wonder whether we will see that pattern repeated in other situations.<br /><br />Un saludoChrisnoreply@blogger.comtag:blogger.com,1999:blog-4650400550712092979.post-25765393354171669842012-12-10T04:14:43.510+01:002012-12-10T04:14:43.510+01:00Antonio,
It is a measure of the success of what y...Antonio,<br /><br />It is a measure of the success of what you are doing on this site that you are attracting the attention of suspension designers like Keith Scott.<br /><br />Congratulations Antonio. May Keith just be the first of many.<br /><br />Cheers<br />ChrisChrisnoreply@blogger.comtag:blogger.com,1999:blog-4650400550712092979.post-10150943336185816552012-12-07T20:51:19.546+01:002012-12-07T20:51:19.546+01:00Simulation is a bit difficult at first, but I thin...Simulation is a bit difficult at first, but I think I'm getting better.<br /><br />Do you use some kind of simulation or Telemetry tests with your designs? I would love to use some telemetry, but it's very expensive.<br /><br />Best regards,<br />Tony.<br />Antonio Osunahttps://www.blogger.com/profile/10075236093614144240noreply@blogger.comtag:blogger.com,1999:blog-4650400550712092979.post-74355421933680908432012-12-07T14:02:21.327+01:002012-12-07T14:02:21.327+01:00Very cool, in that case if you could set up a stan...Very cool, in that case if you could set up a standard program that simulates real world pedaling action, and the related load transfers to the bike that would be very cool as it would more accusrately represent the average rider. It would also have a significant effect on pedal bob.<br /><br />I check your blog at least once a week and translate it. I find it informed and intellengent. Is nice to see some actual data behind arguments in this industry. Even if they are just theoretical approximations, they are much better than most media opinions!! hahaKeith Scotthttps://www.blogger.com/profile/18085377141585149514noreply@blogger.comtag:blogger.com,1999:blog-4650400550712092979.post-28684016840246933422012-12-07T12:40:19.118+01:002012-12-07T12:40:19.118+01:00Pues ya sabes Pachi... toca aprender el idioma!!.
...Pues ya sabes Pachi... toca aprender el idioma!!.<br /><br />Un saludoJosep Barberà.https://www.blogger.com/profile/09869671497387547688noreply@blogger.comtag:blogger.com,1999:blog-4650400550712092979.post-63078522371040541492012-12-07T09:55:26.409+01:002012-12-07T09:55:26.409+01:00Si ya me enteraba de poco por lo intrincado de la ...Si ya me enteraba de poco por lo intrincado de la temática del blog,ahora con comentarios en inglis no te digo ná.Pachi yhttps://www.blogger.com/profile/02649297012701928479noreply@blogger.comtag:blogger.com,1999:blog-4650400550712092979.post-4726038607491337282012-12-05T22:03:36.155+01:002012-12-05T22:03:36.155+01:00Thanks for your comment Keith, it's really nic...Thanks for your comment Keith, it's really nice to have you here.<br /><br />I've never thought about adding that small rocking motion of the torso, but it's not very complicated to do at all. With this program each variable ca be a number or a formula. I can add a motor on the elbow or an actuator to the arms and link it's torque force to the torque at the cranks, so it looks like the rider it's really giving it all... <br /><br />I have tried to make a model that pedals while standing, but It's not finished yet, it's a bit difficult to coordinate the movement of the legs when the hips are not in a fixed position. <br /><br />I do some FEA on my designs, but just to check that the frame it's not going to fail, I don't know how it affects pedalling efficiency.<br /><br />Best regards,<br />Tony.Antonio Osunahttps://www.blogger.com/profile/10075236093614144240noreply@blogger.comtag:blogger.com,1999:blog-4650400550712092979.post-85285671416850936082012-12-05T21:01:40.634+01:002012-12-05T21:01:40.634+01:00Tony, I really enjoy reading your blog. It's g...Tony, I really enjoy reading your blog. It's great to see how you simulate different scenarios in ideal form, and as a frame designer I always find your results interesting in informative.<br /><br />One question for you is if you've considered any ways of simulating rider movement relative to the bike in such scenarios, as the rider is the main mass in the system, an is not a fixed object, so is a very significant factor that I feel should be considered.<br /><br />Also, have you done any analysis into frame stiffness and what affect that has on pedaling efficiency?<br /><br />Keep up the great work,<br />Keith (banshee)Keith Scotthttps://www.blogger.com/profile/18085377141585149514noreply@blogger.comtag:blogger.com,1999:blog-4650400550712092979.post-12105625009253142182012-12-05T04:23:51.491+01:002012-12-05T04:23:51.491+01:00For this test I used the same setup in the three b...For this test I used the same setup in the three bikes, the only thing that is a bit different is the shock rate, because I wanted to adjust the Sag to the same level. I know that the Rocky Mountain should have a higher tune and some Platform, but I'm going to do that in the next experiments.<br /><br />I also would love to do this test with 10-15 models... but each simulation takes a lot of time, like 15 minutes each, and before that I have to prepare the models, draw some new ones, prepare the scenery, etc... It's a lot of work. <br /><br />Best regards, <br />Tony.Antonio Osunahttps://www.blogger.com/profile/10075236093614144240noreply@blogger.comtag:blogger.com,1999:blog-4650400550712092979.post-13276783977030291892012-12-04T23:49:46.897+01:002012-12-04T23:49:46.897+01:00Hello, interesting test.
Does you model take into ...Hello, interesting test.<br />Does you model take into account the shock setup ?<br />A low antisquat design needs a lot of platform in the shock to prevent bobbing on flat ground, so the low velocity tune might on a hight anti squat design might need more.<br /><br />I would like to see this test with a high falling rate design (like the giant or your geronimo) vs a flat anti squat curve like a DWlink.<br /><br />Best regards,<br />VAnonymousnoreply@blogger.com