Nazgul350r wrote:
HA, I wish I could watch that, I will miss it. I hope the comments are enabled on the live stream.
Speaking of comments...how ironic is it that the first youtube comment is from our buddy Dan Sotelo (the wheel balance evangelist) telling Hambini that his testing doesn't take into account the aero affects of wheel imbalance? The irony is rich! LOL...
I actually endured watching it yesterday. Here's a couple of observations:
- The phrase "lots of hand-waving" kept popping into my head
- He admits his drag plots are in the wind axis, and not the body axis of the vehicle...does that mean his results ignore the contribution of any lift in the direction of travel? That would be a big faux pas...
- He claims they now use a pressure rake behind the rider and "edit" that out...I'm not buying it.
- He also mentions that he can calculate the expected drag just based on rim section measurements...and that he's got "grad students" working on it and can make the "measurements" in ~4 minutes. Is he really doing the tests or just making calculations?
- Still no example of an application to a real world prediction and how his data "helps"
edit: - He seems to focus on tire leading aerodynamics and ignore the rim leading contribution.
Nothing surprising though...
http://bikeblather.blogspot.com/