Couldn't you also just get fuel saving benefits from multiple aircraft flying in formation? https://ntrs.nasa.gov/api/citations/20205006743/downloads/AIAA201248

Couldn't you also just get fuel saving benefits from multiple aircraft flying in formation? https://ntrs.nasa.gov/api/citations/20205006743/downloads/AIAA20124802.pdf https://ntrs.nasa.gov/api/citations/20205006743/downloads/AI... I'm surprised that companies like fedex don't do this.