Blindfolding a rider in the wind tunnel wouldn't be impossible would it? How about also not telling him anything about the gear he'll be sitting on prior to the test? The guys operating the tunnel and recording data shouldn't be told anything about the gear being tested either - it could be supplied unpainted without logos. No company reps at the tunnel.
Now, this isn't perfect, but in my opinion it would produce valid results. Of course I doubt any bike company will ever do this because it's a bit of a hassle and because, for the most part, the objective of their testing isn't to obtain valid results.
Now, this isn't perfect, but in my opinion it would produce valid results. Of course I doubt any bike company will ever do this because it's a bit of a hassle and because, for the most part, the objective of their testing isn't to obtain valid results.