Post ABRqjMbIOLVXiYpycK by ashwinvis@fediscience.org
 (DIR) More posts by ashwinvis@fediscience.org
 (DIR) Post #ABRqjLyIjKJdlcappw by guillaume@aleph.land
       2021-09-17T06:14:28Z
       
       0 likes, 0 repeats
       
       I spend so much time repairing and improving my old #recumbent #bicycle from 1999 I bought on Blocket that I'm thinking of just designing a new bike from scratch. But then I realise I know almost nothing about solid mechanics and there are a lot of important details, like how much pedalling power the frame absorbs by bending: http://www.recumbents.com/wisil/brown/bicycleframedesign.htm
       
 (DIR) Post #ABRqjMbIOLVXiYpycK by ashwinvis@fediscience.org
       2021-09-17T09:15:17Z
       
       1 likes, 0 repeats
       
       @guillaumeInteresting hobby. How much "from the scratch" do you intend to go? Will you machine your own parts?
       
 (DIR) Post #ABRqjNAOHra3TPG0Js by guillaume@aleph.land
       2021-09-17T09:18:40Z
       
       1 likes, 0 repeats
       
       @ashwinvis I just registered to the Stockholm Makerspace, they have lots of machines. Now I'm waiting for a welding course to be able to use the welding machines. Then I think I could weld aluminium tubes together for the frame and handlebar, build seat somehow, and use standard bicycle parts for the rest.
       
 (DIR) Post #ABRqjPTbhO8kdaGNY8 by guillaume@aleph.land
       2021-09-17T07:07:35Z
       
       0 likes, 0 repeats
       
       I should try topology optimisationBut not sure how to deal with multi-objective optimisation there?
       
 (DIR) Post #ABRqjWPFvxoq87HVEu by guillaume@aleph.land
       2021-09-17T09:20:08Z
       
       0 likes, 0 repeats
       
       @ashwinvis I already used the 3D printers and metal lathe to make a replacement for the seat attachment that I broke in an accident. In plastic with a brass insert.