Longer range capability is sought by manufacturers but an ever growing number of operators need capacity rather range and this continues to create considerable differential in values. The B777-200ER is a classic example of where some Asian carriers have needed medium haul capability. Instead of using the higher 656,000lb MTOW that the -200ER can offer, some operators use the aircraft with a MTOW of 590,000lbs as well as lower thrust engines. The lower weight still allows the aircraft to be used with a full passenger and cargo load but over shorter sector lengths where not all the available fuel capacity is used. The lower weight results in reduced airport and navigation charges. While at the lower weight the aircraft is still a B777-200ER, the difference in value between high and low gross weight examples is considerable. The manufacturers do offer the ability to purchase the additional weight post-delivery at a discounted price reflecting the lesser number of years that the higher weight can be reasonably utilized.
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