Finally in the project’s end game. There is a very good chance this will be done on time.
The last of adhesive testing is done. My blend of epoxies is good for a shear strength of over 3000 psi. Given the smallest overlap is 2 inches, the weakest compressive/tensile link in the frame is 6000 pounds. I can deal with that.
The steel has all been fabricated, and while my carbon cures, I’m brazing it all up and cleaning it. The head tube has finally been finished. Once the BB assembly is done, I can start epoxying the most critical structural component of the frame.
Now, I’ve been mostly very technical in my approach, but I have not forgotten that this is aesthetics of design. I have tested and very much like the finishing I’m going to be applying to the frame.
Right now, I’m rapidly cycling between total burn-out and being beyond excited about how this is shaping up. My angles look pretty dialed, and I have an assembly plan that should soak up any lingering geometric error. One vertex will be brazed last, so that I can use the actual positions of the intersecting tubes rather than mathematical predictions.
I’m beginning to doubt that I will present a complete bike, but anything is possible. My plan is to leave a day and half for the final clear coat to cure before I assemble.
My goal is:
Downtube and chainstays glued by 4/16
All steel and carbon fabbed by 4/17, EOD.
All carbon faced by 4/18, EOD
All steel (except top seat lug) finished, top tube glued by 4/19, EOD
Top seat lug finalized, 4/21
Top seat lug, seat stays, seat tube glued 4/22
Frame coated 4/23
Assembled morning of presentation, 4/25
Closest shave ever.