Monday, December 31, 2007

TT Trunk Angle

Copied from

"Getting the trunk angle lower can have a significant impact on aerodynamics and performance as summarized in the “rule of thumb” table below (values generated using a mathematical model which uses an average power constraint to determine the optimal pacing strategy for a given TT course):

Table 1. Cherry Creek TT performance and how it is affected by trunk

This is how trunk angle is defined.

It looks like I'll need some new bars (and maybe some yoga lessons) to get to 8 percent trunk angle or better:

I know it doesn't look like it in the photo, but this position actually feels very agressive on the bike. It feels like I'm way out over the front wheel. The ninja-dude's position must feel like he's sitting on the front wheel.

The time listed with each angle is the time saved on a 40K TT IF POWER IS CONSTANT. That's a big IF with extremely aero positions.