You've got to expect the odd "number mishap"! I had various versions, broken down into different-sized steps. Sorrya bout dat. All I can assure you is that in general, the numbers will get larger, more or less, as the lesson progresses. If all goes according to plan.
Sidebar to all this: I'm working on a custom design now that is more challenging than most, and my CAD program wasn't giving me all the answers I wanted. It's not AutoCad, and I know AutoCad would have, but it's what I got and it's good for lots of things and exactness, but in this one instance my pencil drawing told me something my Caddy didn't...because I could extend lines and see angles differently. Plus, it is slighly more satisfying. Then back to Caddy for the final. In the real world where I live, where I design a frame in all its sizes for production, I send my drawings or numbers (derived from them) off to the maker-maker, and they have their own drawing programs. They put the info into theirs, send back drawings for review etc, and so smother mine...except that theirs are just their interpretation of mine, and then if the numbers are right, it's a go. I think Tarek mentioned something like this in the old Bstone catalogue. Scary memory, but yes. This one will be more complete, especially at the fork area. That's a trickier part, and is especially tricker with lugs...but I'm not going to go into all the details there. Not that important, and the thing we're doing here will still have served its purpose. Which is....I'm not sure. No harm is the goal! G G On Aug 2, 6:25 pm, Johnny Alien <johnnyal...@verizon.net> wrote: > OK...that says step 3 on it so I assume it is just a number mishap. > > On Aug 2, 8:39 pm, William <tapebu...@gmail.com> wrote: > > > Step 4 was seat tube angle: > > >http://www.rivbike.com/assets/payloads/336/original_n4_seat_tube_angl... > > > On Aug 2, 5:37 pm, Johnny Alien <johnnyal...@verizon.net> wrote: > > > > Did I miss step 4 somewhere? I had the PDF with step 3 and then the > > > next one was step 5. Was that just an error? > > > > On Aug 2, 1:44 pm, Pondero <cj.spin...@gmail.com> 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 <tapebu...@gmail.com> 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 <tapebu...@gmail.com> 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 <bill.bgib...@gmail.com> 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 <sring...@gmail.com> 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 <tapebu...@gmail.com> 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 > > > > > > > > rbw-owners-bu...@googlegroups.com. > > > > > > > > To unsubscribe from this group, send email to > > > > > > > > rbw-owners-bunch+unsubscr...@googlegroups.com. > > > > > > > > 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 rbw-owners-bu...@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
