OK, Pondero, for what it's worth, here's my stick figure: http://www.flickr.com/photos/45758...@n04/4856880566/
I realize the lines are not dark enough to see all that clearly. I merely guessed at tubing diameters. I think I put the downtube too low where it hits the headtube, so the front wheel is closer to the downtube than it really would be in real life. Doing this excercise made me realize that the downtube and lower head lug are the very last thing to fall in to place. They just end up where they end up. Numbers: My PBH: 87cm ST length 58cm c-to-t Virtual TT length 58cm HT and ST angles 72 Trail 60mm with 584x41 tire Standover 840mm with 584x41tire TT upslope 2 degrees Bartops and saddle level with saddle height at 75cm and Nitto Pearl stem If I get this built, it'll be 130mm spaced. I'll have fender braze ons, and a way to mount a handlebar bag support. Now all I need to do to be ready for PBP 2015 is ride 20,000km! On Aug 2, 10:44 am, Pondero <[email protected]> wrote: > Excellent! Now scan it and show the rest of us. It's critique time. > > Seriously, your approach sounds exactly like what I would do, and I'd > love to see it. > > On Aug 2, 12:35 pm, William <[email protected]> wrote: > > > > > I went ahead and worked ahead. Grant had us up to seat tube angle. I > > did chainstay next, and then seat tube length, which allowed me to > > connect the dots for my seatstays. Then I marked my saddle height and > > drew a level line from the saddle to the front end. I knew I wanted > > to be able to get the bars and saddle level with a Nitto Pearl stem. > > I ended up with a slightly sloping top tube (more slope than a Hilsen, > > less than a Bomba/Hillborne) and still had my standover at a > > comfortable level. Then I dropped the headtube angle to the ground > > and pulled back the trail, which positioned my front hub and > > established fork rake. I went ahead with the compass and spun the > > wheels in, and from that marked where I want the brake bridges. I > > kind of guessed where the downtube meets the headtube. But the thing > > is drawn. It's basically a slightly modified 58cm 650B Hilsen/ > > Saluki. > > > On Jul 28, 10:00 am, William <[email protected]> wrote: > > > > I think Laney College here in Oakland did aframebuilding class, as > > > well as The Crucible, which is a vocational arts school with every > > > kind of heat based trade (glass, welding, blacksmithing, etc). Maybe > > > I should look into that. > > > > On Jul 27, 9:08 pm, Bill Gibson <[email protected]> wrote: > > > > > I took a welding class (Welding for Artists, or something like that) > > > > at the local community college a few years ago and got to try > > > > everything and developed instant respect for the simplest welds in my > > > > life. I got to try both gas and electric and gas brazing and plasma > > > > cutting, and it's on my list. But teaching school science starting > > > > last week, 6 weeks too soon for me -maybe it's time to retire and ride > > > > and make bikes and whittle spoons and kuksas...need to gather school > > > > supplies... > > > > > On Tue, Jul 27, 2010 at 8:26 PM, Steve <[email protected]> wrote: > > > > > I did this: signed up for a framebuilding class, measured my youngest > > > > > son who needed a good road bike, and built a virtual clone of my > > > > > Rambouillet. The only change I made > > > > > was to increase the fender clearance slightly under the headtube and > > > > > the seat stay bridge since my Ram frankly runs at the minimum usable > > > > > clearance with 28mm tires. The lugged bike turned > > > > > out to be spectacular: it handles, if you can believe this, slightly > > > > > better than the Ram (although I suspect that my handling test was > > > > > biased due to less weight in the front bag). No matter; he loves the > > > > > bike. I spent about twelve Sundays building this and loved every > > > > > minute of it. If you can spare the time and cash, do it. > > > > > > Steve > > > > > Ames, IA > > > > > > On Jul 27, 1:25 pm, William <[email protected]> wrote: > > > > >> Grant is apparently going to teach us how todrawa bikeframein his > > > > >> little step by step way. I'm going to follow along. I want a custom > > > > >>framethat somewhat resembles a 58cm 650B A. Homer Hilsen. The > > > > >> critical differences will be that I want it 130mm spaced and want it > > > > >> to be a lighter frameset. I don't know if I'll ever get this > > > > >> frameset > > > > >> made, or whether it will be a Rivendell or an Ebisu or a Davidson or > > > > >> something else. But I'm looking forward to drawing it. I've done a > > > > >> fair amount of drafting table work in Engineering school, but never > > > > >> went ahead and drew a bike. Looking forward to it. > > > > > > -- > > > > > You received this message because you are subscribed to the Google > > > > > Groups "RBW Owners Bunch" group. > > > > > To post to this group, send email to > > > > > [email protected]. > > > > > To unsubscribe from this group, send email to > > > > > [email protected]. > > > > > For more options, visit this group > > > > > athttp://groups.google.com/group/rbw-owners-bunch?hl=en. > > > > > -- > > > > Bill Gibson > > > > Tempe, Arizona, USA -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
