The 747-400ERF is a cargo version that follows the standard -400ER. This aircraft was launched on April 30, 2001 on an order by leasing company ILFC for 5 and entered service in late 2002. The first -400ERF is the 1315th 747 built.
The 747-400ER Freighter is considered the largest commercial cargo transport in service and represents an unbeatable combination of range, payload and speed.
Having a maximum takeoff weight of 875,000 pounds (396,900 kg), the standard 747-400ER Freighter can carry 124 tons (113,000 kg) of cargo up to 4,450 nautical miles (8,240 km).
Also this aircraft has a maximum takeoff weight of 910,000 pounds (412,770 kg) — permitting it to fly an additional 525 nautical miles (972 km).
This takeoff weight increase permits the airplane to fly an additional 525 nautical miles (972 km).