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I've done a new video on the Edgarwits (it's a few weeks away from YouTube release).
It puts together my throttle-stop drag testing (5 per cent reduction in measured drag), tuft testing and pressure testing.
In terms of drag reduction, I think that these external air curtains are probably the best 'bang for your buck' of anything that I have tested.
I'd go for smooth wheel covers first, and then add these.
But I think that using the aerofoil extrusion for the guides is important in reducing parasitic drag (ie drag caused by the air curtain assembly itself).
Happy to help organise a shipment of the extruded aerofoil section if anyone wants it (I can't find it for sale anywhere but here in Australia). Should be able to ship internationally in multiple 1 metre lengths (group buy?). Nothing in it for me, but it's a nice thing and the local seller has always been good to deal with.
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