https://ecomodder.com/forum/member-a...ed-micro-r.jpgGreg Fadler, Group Manager, GM Aerodynamics Engineering, shared the following with MOTOR TREND:
* aero drag constitutes about 30% to 40% of energy consumed on the freeway
* 20% more at 70-mph than at 60-mph
* ( Between 60 and 70, drag increases by 36.1% )
* delta-36.1% / delta- 20% mpg = 10% = 5.54% ( similar to 1963 GM Lab metric for 70-mph aerodynamics )
* the Tahoe's Cd 0.379, vs Cd 0.416 for the typical SUV means 1+ mpg on the highway.
* the Tahoe hybrid's Cd 0.36 comes from its airdam, fascia, and mirrors.
* I couldn't find an official frontal area for the Chevy/GMC/Cadillac variants of this vehicle. Perhaps 34.88 sq-ft ( 3.24 meters-squared ) would be a reasonable working number.
* a curb weight of 5,907- pounds is given.
* from my own experience pulling trailers, I would suggest that any added weight and rolling resistance penalty of an aero trailer is essentially meaningless, compared to the aero advantage.