...for now the return on investment does not appear to support FedEx's goal. Using 727 data for utilization and average leg length, MX savings, and depreciation....it's about 8 yrs ROI. Not even close. If we could make the distance closer to 1200 miles, then 2-3 years would be achievable and put around $20M in the bank at the 15 yr point. Yes, they pay for themselves. Heck, even the Dallas Mavericks have blended winglets!!!