However, the chassis features less radical than competing blended wing body concepts without modifying existing airport infrastructure, and BLI. The original goal was to reduce fuel burn by 70% and noise by 71 dB by flying at Mach 0.74, but a more traditional Mach 0.82 wing and fuselage growth resulted in a more-conservative 49% fuel burn reduction and 40 EPNdB noise reduction against a Boeing 737-800.[7]