Runorama wrote:
Yup. I've only been saying it for 20 years, here but mostly elsewhere. Pressure and interference drag is where it's at, and understanding how these change with speed.
The general principle of interference drag is if you can't space it wide enough, close it up.
RE: Aero changes with speed, especially for things as sensitive as cylinder width/spacing.
The current strategy is to have a refined aero position for flat roads, on the bullhorns for climbs, and tucked on the bullhorns on descents for stability. There's a wide range of flat roads though with pro TT speeds between 20-35mph. Surely the optimal arm/head position is not the same at 20 and 35. In theory a rider could have a few positions each optimized for a narrower range of speeds. Maybe forearm supports that have a few 'slots' of padding at the correct height and width for each range. That way there's no moving parts that would run afoul of the regs.
Even just a high speed/low speed setup, one slot wider and higher than the high speed slot that is narrower and lower.