Having seen too many designs over the years, I can't help thinking a lot of the designs out there in the name of "engineering" are nothing but easthetic in nature or for marketing purposes (I don't like to use the word "gimmick" because there is a lot more to this sport than adding XX seconds to your next 40km TT).
Square tubing, HP chainstays, Zerts, to name a few. Or whatever this BMC design is called.
Therefore, this time around, I will try to use more round shapes, continuous curves, unless I am absolutely sure a departure serves any real purpose. This is hardly new (Parlee, Crumpton, etc...) but it will be interesting to see how it blends with the semi aero features.
For starter, now that I have decided to use ISP, the ISP mast will be aero but I will depart from the typical airfoil spotted on Pinarello/Merckx/TIme RXR/and really pretty much every aero bike, which has a round front portion but "V" trailing edge.
We all know wide flat surface isn't known to be very stiff, and counterintuitively, the V shaped tubing may not be necessarily that aerodynamic either. Interestingly, the wheel industry, whose livlihood pretty much depends on aerodynamics, are going away from "V" shaped rims in favor of more "Oval" shaped rims.
Since another major complaint about aero tubing is the harshness (mainly due to the huge width of the mast, and many manufacturers are working on the mast to help resolve that issue, although Giant's new bend near the cluster is a total aesthetic disaster), so a less wide mast will be a bit easier on my butt as well.
Therefore, a rounder back half of the mast will increase the stiffness, use less material (no need to be as wide) with little compromise in aerodynamics.
The result, is an "egg" shaped tubing, for variously parts of the frame, and especially the seat mast, which will likely be around 35mm wide or less, and hopefully won't beat up my backside.
Fast falcons: http://www.youtube.com/watch?v=j3mTPEuFcWk
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