2021- Ford f-150 active air dam

[Vekke]

Hi,

Does anyone have idea how much lower the air dam comes down from underside lowest flat points of the vehicle?

If you have pictures from back towards front would also help to estimate the situation in that truck.

https://www.youtube.com/watch?v=DC_GZLR1Kpg

I am tweaking a MB sprinter van which are horrible for underside aero and the front air dam might be easier to do than full flat underside.

[wax87]

I want to do something similar with my Ford Maverick truck

[Vekke]

Some CFD.

https://youtu.be/E0ass_AxloM?si=HrtaggZdexZ48wNh

I think thats made with the spoiler in normal position when I did few picture overlays

[freebeard]

That's an informative video*. So I went to see if they had done a VW Beetle. Yes, but it's a five-year old tuft test of the roof centerline.

how much lower the air dam comes down from underside lowest flat points of the vehicle

Not sure what you're looking for here. I surmise that the air dam should shield 90% of the undercarriage, with local blisters on the remaining 10% to minimize frontal area.

On my vehicle that would be the front tow hook. It stands proud by 2-3".

*Especially Surface Friction.

[aerohead]

We'd really need a dimensioned, technical drawing of the truck, with everything shown in 'true length', which we could measure and scale from.
The airdam, when fully deployed, is likely increasing frontal area, and we'd need that new value, along with the actual drag force, to reverse-engineer it's Cd, at this increased frontal area, normalized to 'Standard Air'.
Vman455 shared an SAE Paper from Ford a few years back, where they were reporting on 'fixed' airdam research with a F-150 also. The grad students, or PhD candidates who conducted the research, also failed to communicate the change in the truck's frontal area as they increased 'depth' from the original dimension.

[aerohead]

The last official accounting I have for the F-150 is from 2014.
At that time, the F-150 EcoBoost, Crew Cab, 4X4, with 6.5-foot bed was reported @ Cd 0.402, and Af 36-sq-ft ( 3.3445 meters-square ).
It's difficult to imagine that any succeeding model from then would have a higher Cd.
If so, AirShaper's Cd 0.456 would be at least 54-counts higher than actual.