tag:blogger.com,1999:blog-4786784182488135171.post2690316467616783303..comments2023-07-21T17:26:24.127+04:00Comments on Ron George: Rational Bicycle Frame Design : Giving Consideration To FunctionalityRonhttp://www.blogger.com/profile/16268869622833968439noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-4786784182488135171.post-41008900649093797282009-03-01T10:06:00.000+04:002009-03-01T10:06:00.000+04:00was just thinking, in designing a bike frame.. wou...was just thinking, in designing a bike frame.. wouldn't u have to consider bending moment?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4786784182488135171.post-84122598058245986682008-11-10T07:15:00.000+04:002008-11-10T07:15:00.000+04:00Ron - The robots in Asia making the majority of bi...Ron - The robots in Asia making the majority of bicycle frames sold throughout the world are called people. <br>It doesn't matter the material used in the construction, people are doing the work. <br><br>A TIG welded steel frame is lighter, as well as cheaper to manufacture then a lugged frame, and it offers the possibility for a greater range in design with regards to geometry as well as tube size & shape. <br><br>Any strength that you may gain from a lugged frame can easily be offset in a welded frame using tube size, shape and butting which will create a frame which is still cheaper and lighter to manufacture. <br><br>In his day, Merckx was super into anything that would give him a tactical edge on the competition. If carbon fiber frames were made back then, I am sure he would have been one of the first to ride them. In fact Merckx was a driving force in bringing carbon fiber frames to market for this very reason. It might have had something to do with his kid racing and overall support for the teams he sponsored. <br><br>Lastly, are you aware of any deign that has been proven to have a superior strength to weight ratio combined with the ability to resist torsional loading while maintaining vertical compliance then the traditional UCI mandated 'double diamond' design of the safety bicycle? <br>If so, please share this. <br><br> - RyanAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4786784182488135171.post-43642273234125326282008-11-08T01:14:00.000+04:002008-11-08T01:14:00.000+04:00You cooked this post real good. I hardly thought a...You cooked this post real good. I hardly thought about these issues before I read your post. Keep it up.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4786784182488135171.post-91257527841372044642008-11-07T22:56:00.000+04:002008-11-07T22:56:00.000+04:00Well, for that matter even Merckx based most of hi...Well, for that matter even Merckx based most of his business on high end carbon frames as well, when he never raced on one in his life. Its a good question to ask these guys - why don't you promote the type of frames you guys won all those great races on. :)Ronhttps://www.blogger.com/profile/18394865788996482667noreply@blogger.comtag:blogger.com,1999:blog-4786784182488135171.post-47812387091790120402008-11-07T18:01:00.000+04:002008-11-07T18:01:00.000+04:00love the hammock seat on the pedersenlove the hammock seat on the pedersenAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4786784182488135171.post-64079875553550096092008-11-07T15:48:00.000+04:002008-11-07T15:48:00.000+04:00Great Post Ron !Thanks for the refs too .. not see...Great Post Ron !<br><br>Thanks for the refs too .. not seen them before, and I LOVE Ashby tables to graphically compare different properties.<br><br>Good point Phil - its a good thing UCI have little control over MTB, folder or HPV development or there would be little new in bike development beyond agonising over a the microscopic difference a the direction of a bit of carbon weave goes in :-)<br><br>Finally I guess everyone has seen the "Bicycles & tricycles" by Archibold Sharp, Imperial College, <<1896>> !! ). Which still has loads of relevance today and shows a vast range of alternatives from around the genesis of the diamond frame, but before it had been 'chosen' as THE one. I particularly love the graphic force diagram solutions, which still make quick force analysis a doddle with acruate 2D cad systems.<br><br>Now FEA is a a very useful tool to play 'what-ifs' in 3D. But as ever with computors they are just tools, and its creative engineering that the humans bring in.Human_Amplifiernoreply@blogger.comtag:blogger.com,1999:blog-4786784182488135171.post-4046337447094663722008-11-07T06:56:00.000+04:002008-11-07T06:56:00.000+04:00Some tried and tested designs will never leave us....Some tried and tested designs will never leave us. Is the modern passenger airplane looking any drastically different from the vintage ones, although it has gone through several phases? I think while structurally they have not changed, its the materials aspect thats really botching up transportation equipment. Same is true for bicycles, where most of whom I observe are competing on type of material used, to make it stiffer and lighter.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4786784182488135171.post-85778128324771282692008-11-07T06:46:00.000+04:002008-11-07T06:46:00.000+04:00Ron, also dont forget the rigid rules of the UCI h...Ron, also dont forget the rigid rules of the UCI has also been discouraging bicycle makers to make something different with regards to racing bikes. The risk of not being able to produce something that can be pedalled by top competitors in the world, including the loss in business and money through advertisements, must be too great. It is unfortunate that the bicycle is boxed in a corner like this. One one hand, there is an age old design that works but people complain about it, on the other hand...some agencies equivalent to the medieval Catholic Church restrain design and consequent racing on newer designs. Great post!Philnoreply@blogger.comtag:blogger.com,1999:blog-4786784182488135171.post-61001632803850783212008-11-07T06:34:00.000+04:002008-11-07T06:34:00.000+04:00By the way, Johaan Musseuw used lugged frames in m...By the way, Johaan Musseuw used lugged frames in many of his cyclocross races. He even won Paris Roubaix on them. If lugged is strong enough for him, I think the rest of us flailing amateurs should be pretty well off. :)<br><br>The only other thing I can think off is weight of the frame, since cyclocross requires you to pick it up while running across obstacles and climbing up short hills. However, the right technique to picking a bike in cyclocross only involvs a slight twisting of the frame with the pivot point made by your holding arm's elbow and the saddle. I don't think a pound of extra weight is an issue for such a minimal movement.<br><br>But if you have the money, get the best equipment for the application.Ronhttps://www.blogger.com/profile/18394865788996482667noreply@blogger.comtag:blogger.com,1999:blog-4786784182488135171.post-7033253706316756932008-11-07T06:00:00.000+04:002008-11-07T06:00:00.000+04:00Thanks for that ron. I think the first frame I wan...Thanks for that ron. I think the first frame I want to tackle is going to be a cyclocross frame. I wonder what the diference will be between lugged or welded?<br><br>Bontrager seems to think lugged can't hold up but Sachs races lugged.<br><br>Any thoughts?<br><br>-BBluenoserhttps://www.blogger.com/profile/03448920726947078281noreply@blogger.com