Tuesday, November 29, 2011

I got the dropouts brazed to the chainstays and seat tube to the bottom bracket.  I like to leave some tube showing inside the bb.  That way I can get a little fillet for additional strength even though it doesn't need it.  When the frame is complete, I will dress the inside of the bb.  You can see one of the dropout windows is almost done.

Saturday, November 26, 2011

I spent the afternoon setting the tacking fixture up and at the last minute I decided to hog out the windows on the dropouts.  I might put ss faces on them also.  Time for a Sucks.
Now that the Tryptophan has worn off, I can get back to work on Tinas frame.  I identified and marked the high spot of the bow on the 3 main tubes to make sure the triangle is assembled with them in plane.  I did some carving on the seat tube port just to dress it up a little. I also reconfiguredthe port angle a little with the die grinder, workingtowardsthat 55.6 degree between the down and seat tubes. 


Tuesday, November 22, 2011

 I'm caught up on repairs, so back to work on Tinas frame.  The bottom bracket is set for 60.5 degrees between the down and seat tubes. But, because her frame is so small, the that angle has tightened up to 55.6, you can see the difference from the protractor.  Using my primitive benders, I was able to close the angle considerably.  I will complete the final fitment in the tacking fixture.

Sunday, November 20, 2011

Here is an "almost" final dwg. of Tinas frame.  Due to her opting for 700s and the low stand over heigth, there are some tight front triangle angles.  The bb shouldn't be any problem, but the head tube lugs will probably turn into a mono-lug with re-angled ports. Her tube set is S3 and Columbus with Llewellyn lugs and bb.  The drop outs are Long Shin adjustable that weigh in at 135 gms., definitely going to hog out the windows on them.

Friday, November 18, 2011

I brazed the chain stays yesterday under my new heat lamp and it was quite nice.  With out the bb adapter I need to determine the cable routings, I probably shouldn't have,  but I was on a roll and couldn't stop.  I pre drilled the exit hole for the front derailer cable so that shouldn't be an issue.  But the entry hole into the chain stay for the rear derailer might cause me problems.  I'm going to hang it on the wall until the adapter shows up.

Wednesday, November 16, 2011

I went ahead and started fitting up the 410 mm chain stays last night, but had to quit early due to the poor lighting in the garage.  I can put on the chain stays and still have access to the bb where I will put in the front derailer exit port.  So now I'm thinking matte black with a gloss black logo.