Quote:
Originally Posted by M_a_t_t
Are you saying 2 and 3 had a piece put back on (as in return to OEM)? Or are we just guessing a random mod?
Also there is a poll option...
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Yep, just guessing a random mod based on tuft behavior. I will say that both mods are moderately-to-very common on Priuschat, but to my knowledge have never been measured by anyone using them (although Altered 1 is often claimed to "improve downforce" by people who fit it on their Prius).
Quote:
Originally Posted by JulianEdgar
Baseline: Very good flow, isn't it? I'd be pretty happy with that.
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I thought so too. I could see some of the movement of the outermost tufts that the camera didn't pick up so well, but I'll comment on what I think is happening after I pressure test (if that confirms what I suspect).
Quote:
Originally Posted by JulianEdgar
Altered 1: I'd be reasonably confident you've added a fence/lip (eg a 1-inch high vertical plate or similar) that causes separation from the top of the hatch.
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Bingo! Almost exactly right--I taped a 21mm high lip to the top edge of the window:
Quote:
Originally Posted by JulianEdgar
Altered 2: A harder one. My wife (who has watched aero testing tufts for about 25 years) says the wiper has been put back on. I say the antenna has been put back on.
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Yes, this one is more difficult. There's no disruption to the baseline flow pattern, but the tufts toward the trailing edge of the window are behaving slightly differently. (Actually, now that I look again the tufts at the leading edge have changed behavior slightly as well).