Sunday, August 31, 2008
Seat tube brazed in here and getting one of the 40-50 alignment checks a frame gets through the build process. Nice and square here!
View from inside the BB after the downtube is brazed in- it's the little things......
Top tube mitered and fitted. I like to be able to rotate the frame for this braze, so the frame is clamped in a workstand that allows me to turn it whichever way I need.
A trip to the Morroni jig to get the chainstays fitted up. I love this huge chuck of machined steel, there's only one other jig like this in use today. But I do know where another one is sitting and can be had for a song!
Tuesday, August 26, 2008
All brazed up! It looks like hell with the flux still on it, but trust me, it's a nice braze!
Lining up the angle with the blue print- spot on! If it were off, I'd have to cold set it (read: bend) something I absolutely hate to do and something I haven't had to do since my first frame. If the miter is right and the proper brazing sequence is followed, it will be right every time.
Saturday, August 23, 2008
Thursday, August 21, 2008
Here you see the initial cut out. It kinda makes the stay look like a big hypodermic needle, huh? A blurry pic of a scrap piece of seat stay brazed in place. I like to use this diameter because it gives the cap a more scalloped look.Excess tube cut away and a bit of file work later......and we have our cap!
Got to working and left the camera in the house for the chain stays and blades. Blades have been raked to 50mm, with a nice curve to them.
Tuesday, August 19, 2008
After all the dimensions and geometry is hashed out, I draw up a full size blueprint for the frame- no computer needed.
Then, all the tubes have to be cleaned inside and out and inspected. I look for any imperfections, mark the butt lengths, check the tubes for straightness (by the way, no tubeset is perfectly straight), and orient the bows in the tubing so that when the frame is built the bows won't affect the alignment. I'm using a Dedacciai tubeset here, and as is typical for this brand, everything is very nice and within 1mm of being true.
Next: sub-assembly fabrication.
Saturday, August 16, 2008
So here it is:
Bridge is a 16 tooth cog with requisite lightning bolt.
Saturday, August 9, 2008
First practice run with one of the "big" boys.
Jammin' down the start ramp- the coolest 5 year old out there! ;)
Lined up and ready for moto 1.
Riding alone after a pretty good crash at the end of moto 2- turns out the new bike is so much faster he's catching air in places he was just barely rolling over before. Still ended up with a 2nd place trophy on the day, not bad for the first time out on the new bike!
Next up, the curved seat tube fixed gear I mentioned a while back.