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Old 11-13-2020, 09:08 PM   #877 (permalink)
kach22i
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Quote:
Originally Posted by Cd View Post
I wish they still had tufts on the cars when they do these tests.
I have seen the tuft and smoke combo tests done on the RX-7, but not much else.
When looking at the smoke on the A class, you can't even see a difference between it, and and old pickup truck.
With tufts, you really see what's going on with the airflow, all along the sides of the car.
I'd really like to know why manufacturers did away with tuft testing.
Perhaps they indeed still do tuft test, but keep the pretty smoke pictures for PR use
In one video university students were using microphones to listen to the air as it hit A-pillars, door gaps and wheel openings.

It's not just visual these days I guess.

Then you have all those micro sensors and the like.

To me smoke pictures are relaxing, like watching a babbling brook, not of lot of hard data though.

I've never seen a swirling vortex for example, the smoke seems to dissipate.

The oddest thing in the videos is that 95% of the air never goes over the roof, you have to be dead on center for the smoke not to go angling off the hood and then windscreen and roll off the A-pillars.
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