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Old 10-29-2021, 11:56 AM   #633 (permalink)
aerohead
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fins

Quote:
Originally Posted by tomi_k View Post
Latest box with vertical fins... and changed top surface... this is the one which I used on my latest record (11.20 liters / 100km)...

Fins will be moved few inches "out" (closer to the tail lights) as I have room for it... and side fairing might show up ...

In a 90-degree, sidewind gust, the fin would be in the range of Cd 1.15, same as a sheet of plywood. That far back, behind the rear axle, she could present quite a yaw-moment, good, safety weather-vaning, flat-out at Bonneville, but maybe freaky out on the open road.
I've driven Spirit in pre- lethal, supercell cyclonic inflow, out in the Texas Panhandle, at 75-mph, and had no handling issues.
If you have a chance to safely test for stability, it would be very valuable data.
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