The 787 has been designed to be 20% more fuel efficient than the 767 it is to replace. Boeing states that it is the company's most fuel-efficient airliner and the world's first major airliner to use composite materials as the primary material in the construction of its airframe. The Boeing 787 Dreamliner is a long-range, mid-size wide-body, twin-engine jet airliner developed by Boeing Commercial Airplanes. This soundpackage includes the following : Turbine Sound Studios proudly presents the HD version of the Boeing 787 Rolls Royce Trent-1000 soundpack for FSX recorded in HD High definition.