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Old 06-09-2020, 05:24 PM   #26 (permalink)
freebeard
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If the goal is to raise pressure on the leeward side in a crosswind, Maybe you can achieve your goal with a roof-top strake.

https://www.mrn.com/wp-content/uploa...-Las-Vegas.jpg
These are designed to kill lift when driving sideways, but they should have the same effect as a Gurney flap/wickerbill at the rear rolling vortexes down the lee side.
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