Well to contribute constructively to the conversation instead of just being a jerk and to help you with your caad drawing I will submit this picture of the Breezer Lightening and how high he had to make the seat stays to accommodate the brake on the chain stay. Most current designs place the tab for the rear brake on the seat stay. The rear tab is directly over the rear axle and the current 140 adapter is basically flat with only enough room for the bolt holes. So while I have considered this in my brain, and visualized it, I don't think you have thought it through very far. Breezer is a legendary guy and he makes a living designing bikes. If he limited his design to 140 mm discs, he could probably shave an inch out of the seat stays, but I don't see these arched seat stays being popular on race oriented road frames.
Since you are such a caad ace it should be easy for you to include dimensional data with your graphic. I hope that doesn't move the goal post out of your range.
Well the link won't work because dirt rag won't let it. So I will figure out a work around and reapost.
I have no issues with dimensional drawings but I want see yours from your head.. where's your so called 'figured it out in my head' limitations ? If you want one from me, then I want one from you too.
You see.. you're just taking all the things at face value without understanding the underlying reasons why things are done in a certain way. And basically, you're still trying to wriggle yourself out of a hole you dug yourself.
The 140mm limitation is a direct result of inherent industry mounting standards. Joe is a seasoned and well respected bike designer. He is also not a dumb business man either, he needs to sell his bikes. For that, it needs to work with industry available components. He's not big enough to move the industry and he knows that. So when that happens, basically he's got to stick to what the industry dictates. In this case, you've got to work within a limitation, which are disc brakes that are available in the industry. That's why I mentioned that VNtech knows what he's talking about.
Which is why I stated, in the context of this thread that its possible to do a 110mm disc, maybe even smaller. Because we are talking about Shimano here. They can almost dictate the industry (bicycle) standard when they really want/have to. Its just the practical physical limits that's the issue. Not what Joe Breezer has to deal with there.