Originally Posted by
jmikami
And yes one guys imperfect study doesn't really mean anything, but then again does it mean any less than numbers paid for by the marketing department of the company selling it to you?
Imperfect is probably understating. It's essentially worthless.
I'm sure some companies might fudge test results, but I'm also sure some don't. If they are doing wind tunnel or velodrome testing at a facility like VSC the numbers are what they are.
Baseline testing for anything requires a tight protocol, repeatability, and controlled conditions. Llama didn't show any of that.
Helmet testing requires you to test the helmet on you; what is best on one person can be the worst on another. Looking left might produce better results for one helmet. Helmets will produce different numbers in the drops vs. the hoods vs. the IAB.
Different size helmets of the same model will produce different numbers. So will how the helmet is adjusted.
Saying X helmet produces X less drag is saying a Chevy is faster than a Ford. It's pretty easy to shoot that full of holes because there are so many variables.