Thanks Steffen and Patrick for concerns and ideas. I have added two tubes (handle bars) as Patrick suggested, which also strengthens the shock joint. I promise not to do any jumping unless in controlled testing (safe). The original goal is to see how much front suspension can reduce road disturbance to steering, which perhaps can compensate for smaller wheels / tires... Steffen's idea is similar to this full suspension python built in 2008, http://www.flickr.com/photos/python_uploads/2827143639, which I wish I saw before building mine. This design seems stronger / lighter / more compact. Any thoughts? Vi >________________________________ > From: Steffen Risse <big.skangster@xxxxxxxxxxxxxx> >To: python@xxxxxxxxxxxxx >Sent: Wednesday, November 23, 2011 7:43 AM >Subject: [python] Re: Front suspension update > > >Hello Vi, > >the idea is nice and brings some ideas for me too, but Patrick is absolute >right when he says that the system doesn't looks very stable. I'm working with >welding every day, and when I saw the point where the frame broke, I didn't >wondered about the crack. The frame is relative slim at that point and your >weld seems are for sure no beauties. I like all your projects, as they include >so many clever ideas, and I don't wanna hear something like "his frame broke >in heavy traffic and ...". So there are to ways. 1: built the frame geometries >that they meet the load conditions better (long lever = high profile) 2. get >better knowledge of welding and clean the parts better before welding (no >chrom, no paint). Sorry for theharangue but some of that what I saw scares me. > >Here 2 ideas from me to your suspension project. Maybe they are better (maybe >not) > >regards, >Steffen > > > >>________________________________ >From: Patrick van Gompel <patrick_van_gompel@xxxxxxxxxxx> >To: python@xxxxxxxxxxxxx >Sent: Wednesday, November 23, 2011 5:24 AM >Subject: [python] Re: Front suspension update > > >Hey Vi, > >Front wheel suspension: wow, nice build. >Except for the 'front part - pivot' attachment the 'suspension fork to frame >tube' seems a little weak too. Why not weld two extra tubes left and right of >the front wheel to make a triangle (as in the attached picture). Just an idea >to make your ride safer... > >Happy cycling, >Patrick
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