gitaneusa.com Forum Index » Vintage Gitane » Skinny pipe steel bike riders vindicated.    View previous topic :: View next topic  Skinny pipe steel bike riders vindicated.   Posted: Sun Jul 27, 2014 12:29 pm verktyg Joined: 14 Jan 2007 Posts: 2814 Location: SF Bay Area Us skinny pipe, steel frame riding retro grouches can feel some measure of satisfaction in this article about "carbon" - i.e. Carbon Fiber Reinforced Plastic frames and components! http://www.nytimes.com/2014/07/27/sports/cycling/as-technology-makes-bicycles-lighter-and-faster-it8217s-the-cyclists-falling-harder.html?_r=1 I've been beating this drum for for over 40 years! First got involved with Carbon Fiber Reinforced Epoxy products in the 1970s! _________________ Chas. SF Bay Area, CA USA ============== 1984 Criterium 1969 TdF 1971 TdF 1974 TdF 1984 TdF x 2 Bikes 1970 SC 1971 SC 1972 SC 1984 SC 1984 Team Pro 1985 Professional 1990s Team Replica   Posted: Sun Jul 27, 2014 5:08 pm smilingroadrunner Joined: 10 Aug 2007 Posts: 278 Location: Salina, Ks. Thanks Chas, I Like Steel !!! _____________ C.A. Salina, Ks. Good News, The ?? '72-- '73 Super Corsa that I've been pursuing for over a decade will be joining my stable, the owner finally committed to let me purchase earlier this past April, a couple more payments and it will come home. Pictures to post in the future. Also getting close to the completion of the T de F frame build up for my new Daughter in Law. will post when complete.   Posted: Mon Jul 28, 2014 9:26 am Frenchbuilt Joined: 18 Apr 2007 Posts: 443 Nice article. We work with carbon and are doing a pro bike frame right now and when looking carefully at the model we are replacing, it is clear that the hand work involved can give good and "bad" frames and all within the same production standard. Under normal conditions, its OK but just like a race car needs checking and beefing up, a carbon frame needs checking to make sure its built well. Carbon is so light that an extra layer can be added in the lay up to make up for for a slip up in building. Cheaper carbon frames have wall thicknesses not too well controlled. But design/style wise, you can do anything with carbon and the only limits today are the rules.   Posted: Mon Jul 28, 2014 9:32 pm verktyg Joined: 14 Jan 2007 Posts: 2814 Location: SF Bay Area Frenchbuilt wrote: Nice article. We work with carbon and are doing a pro bike frame right now and when looking carefully at the model we are replacing, it is clear that the hand work involved can give good and "bad" frames and all within the same production standard. Under normal conditions, its OK but just like a race car needs checking and beefing up, a carbon frame needs checking to make sure its built well. Carbon is so light that an extra layer can be added in the lay up to make up for for a slip up in building. Cheaper carbon frames have wall thicknesses not too well controlled. But design/style wise, you can do anything with carbon and the only limits today are the rules. Good points. structural design and fabrication are much more critical in Carbon Fiber Reinforced Polymer parts. Carbon Fibers provide high strength but the bond of the plastic binder (polymer) to the fibers is what provides a strong light component. Failures in CFRP are frequently the result of delamination which occurs when the binder material looses adhesion to the fibers. Layup is the process of applying Carbon Fibers or CF Fabric to a mold or mandrel during the assembly process. The fibers or fabric is usually presoaked in the binder which is most often epoxy. Afterward more binder is applied to hold everything together and provide a smooth surface. The parts are usually heated in a low temperature furnace to quickly "cure" or harden the binder. If all of these processes are not carefully done or the design allows for inconsistent thicknesses within in the part then unpredictable failures can occur in seemingly unstressed areas like the middle of a fork blade. Inconsistent mixture 2 part binders like epoxy and also result in problems. STEEL! The Magic Material! _________________ Chas. SF Bay Area, CA USA ============== 1984 Criterium 1969 TdF 1971 TdF 1974 TdF 1984 TdF x 2 Bikes 1970 SC 1971 SC 1972 SC 1984 SC 1984 Team Pro 1985 Professional 1990s Team Replica And now for some levity   Posted: Mon Jul 28, 2014 9:40 pm verktyg Joined: 14 Jan 2007 Posts: 2814 Location: SF Bay Area For the Pro or Cat 1 weight weenie who needs everything in light weight carbon... It helps you go faster..... _________________ Chas. SF Bay Area, CA USA ============== 1984 Criterium 1969 TdF 1971 TdF 1974 TdF 1984 TdF x 2 Bikes 1970 SC 1971 SC 1972 SC 1984 SC 1984 Team Pro 1985 Professional 1990s Team Replica   Posted: Tue Aug 19, 2014 6:22 am mountaindave Joined: 22 Jun 2010 Posts: 75 Location: Flathead Valley, MT ^^^ LOL   Posted: Tue Aug 19, 2014 6:58 am MiloFrance Joined: 18 Aug 2014 Posts: 12 Location: France Fantastic! The retro steel market in the Uk now has high end classic italians going for £500 frame and fork only. Has the carbon bubble peaked? _________________ Brompton Edge Mango (Custom SS welded by Carl Strong in Montana) 1998 Colnago Titanio with ll the original chorus gruppo Not a Gitane but Pretty frame with wrong decals I'm a believer   Posted: Tue Aug 19, 2014 6:59 am JerryC Joined: 06 Mar 2014 Posts: 39 _________________ Jerry Milwaukee ,WI Carbon Fiber Frame Test   Posted: Tue Aug 19, 2014 1:22 pm verktyg Joined: 14 Jan 2007 Posts: 2814 Location: SF Bay Area See for yourselves the results of this carbon fiber frame test! Unpredictable, catastrophic failure! _________________ Chas. SF Bay Area, CA USA ============== 1984 Criterium 1969 TdF 1971 TdF 1974 TdF 1984 TdF x 2 Bikes 1970 SC 1971 SC 1972 SC 1984 SC 1984 Team Pro 1985 Professional 1990s Team Replica skinny   Posted: Wed Aug 20, 2014 6:53 am JerryC Joined: 06 Mar 2014 Posts: 39 looks like a freak accident. who's the freak? _________________ Jerry Milwaukee ,WI Freaks!   Posted: Wed Aug 20, 2014 4:38 pm verktyg Joined: 14 Jan 2007 Posts: 2814 Location: SF Bay Area JerryC wrote: looks like a freak accident. who's the freak? _________________ Chas. SF Bay Area, CA USA ============== 1984 Criterium 1969 TdF 1971 TdF 1974 TdF 1984 TdF x 2 Bikes 1970 SC 1971 SC 1972 SC 1984 SC 1984 Team Pro 1985 Professional 1990s Team Replica   Posted: Fri Aug 22, 2014 11:51 am Frenchbuilt Joined: 18 Apr 2007 Posts: 443 Two steps forward, one step back...thats called progress. Carbon is the future but "metal" is used on almost all mass produced bicycles. Skinny pipe steel bike riders vindicated.     gitaneusa.com Forum Index » Vintage Gitane You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT - 8 Hours   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum Gitane USA----------------Vintage GitaneGitane RacingModern GitanePro Racing - Classics/Giro/Tour....Owner Gallery   Powered by phpBB © 2001-2004 phpBB Group Designed for Trushkin.net | Themes Database.