I'll have to jump ahead a bit, to the DT and chainstays. The DT/BB part is the backbone of the bike, everything connects to
this, and it needs to be very strong. Anything behind this breaks, and you just drag to a stop, anything in front of this breaks,
and you take a flyer. That big long fork is going to have a lot of force on it, at 30 mph with a 60 lb bike.
I draw the plans in pencil, full size. This allows me to place the tube, or part right on the drawing, and the pencil makes it easy
to change things. Inspiration will always hit you on a build, so keep a big eraser on hand! I about wore that paper out.
I used a bridge right next to the BB shell to get a good hook up, this is another place that needs to stay together.
This is where it starts to get exciting! That bike is crawling right ip off the table! It's Alive!!!!
Now it's time for the dropouts. I use regular old cold roll steel from the local hardware store. You want something nice
and soft. Don't use 4130 because its too hard, and the skewer won't get a grip on it, plus, that stuff is too strong to bend,
or cold set. Thats not to say you can't use it, of course you can,..just beware. Were talking rear drops here, not front.
Just make sure it's 1/4" stock, don't use that 1/8" stuff!!
Make a pattern of what you want. I have a plasma cutter to slice it out, but you can use a hacksaw just as well. Then
bolt it up and take it over to the grinder. Use a course wheel, and take it easy,.. these things have been known to blow up.
Don't think it won't happen, because it will,..ware a face shield.
Let the sparks fly, and grind as close to your marks as you can, then use a file for the rest.
Drill some holes here and there, especially in the tabs that get brazed into the tubing, as it takes lots of heat to hook this
up, and you might break down the flux doing so. I'm sure you Tig guys are laughing at this, you get to just zip things up!
There they are, looking like jewelry. I didn't use a rear der at first, and had to add a hanger later, But you can just draw
To be continued....