RayzorBEV
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Will the wrap on this CT has any material impact on the Cd? I'm pretty sure Tesla ran their test on a bare CT with no wrap...Hmma)
Desc: We (i1Tesla) took the CyberTruck to my local wind tunnel at A2 Wind Tunnel in Mooresville NC. To see the efficiency of the different ride heights. Plus what the mirrors off and tonneau cover open. Shocking results
[Very little cD difference WITHOUT side mirrors! See table below]
Title: TESLA CyberTruck Wind Tunnel Testing - SHOCKING Results
Author: i1Tesla
NOTE:
_ cD values are accurate (relative) when comparing scenerios to each other (eg with and without side mirrors; with and without tonneau cover; etc).
_ However, as explained in the video from a professional at that company --- regarding the below cD table values that the tunnel wasn't built to test taller vehicles like trucks (vs race cars, bikes, etc) and the results could be slightly off. ie. Tesla claims 0.34 vs 0.38+ below. The professional said that tunnels that account for taller vehicles may be off more like 0.01 +/-
h/t: Gurule92
b) cD explanations.
cD values are accurate (relative) when comparing scenarios to each other
- with and without side mirrors
- with and without tonneau cover
- etc
Per the professional in the video ... a flat-faced object that matched the profile like below would be ~1.0 cD and the Tesla CyberTruck value is 0.34 cD (depth and air flow) uses about 34% of that energy / effort / force to go down the highway.
c) Re: [Very little cD difference WITHOUT side mirrors! See table below]
Turns out in this example given the Cybertrucks shape that it makes very little difference so it does not at all seem worth the trouble. I bet dropping 1 MPH is even better efficiency improvement [though I haven't tried ABRP as an example to see that ].
d)
RELATED to another post of mine in the past:
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Related to the aero, I thought this video was quite interesting and likely has been discussed but seemed to go along with your comments.
The below is about how far the 'sails' are angled in (and I thought was a surprising nugget) but the whole video is good on the front and rear air pressures.
Title: How The Cybertruck Is More Aero Than It Looks
5:37 or 337 secs in.
Images create from AirShaper videos
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