Model introduction: sound 777 is a double-headed wide-bodied (airliner) developed by Boeing Company in the United States. It was officially launched on October 29, 1990. Boeing 777-200 made its first flight on June 12, 1994. On April 19, 1995, it obtained the model certificate of the United Aviation Administration of the United States and the European airworthiness certificate. On May 17, 1995, the first flight was delivered to users. Boeing 777-300 is an extended type of Boeing 777-200 twin-engine aircraft. On June 26, 1995, Boeing officially decided to produce 777-300. Before that, Boeing conducted a market feasibility survey on whether to lengthen 777-200, thus determining the design requirements of 777-300. The 300 model is 10.1 meters longer than the 777-200 model, and the length exceeds the sound 747 model.

 777-300 passenger capacity and endurance distance are equivalent to the old-type sound 747, with 368 passengers in the standard 3-cabin layout; 451 passengers in the standard 2-cabin layout, and the maximum passenger capacity can reach 550. The voyage reaches 11,135 kilometers. The passenger capacity increases by 20% compared with the benchmark model, which can meet the needs of customers who want to replace the early model of sound 747.
  Boeing 777-300 is the first plane to use cameras as standard equipment. The cameras can let the pilots of the plane see the sliding situation of the wheels. In order to improve mobility, the camera is located at the front edge of the left and right horizontal stabilizer and below the fuselage for aircraft ground control. The image is displayed on the multifunctional monitor in the cockpit in the form of 3-way separation. 777-300 has a long body and a skid to avoid the tail touching the ground. It adopts a new type of semi-rocker landing gear (semi-levered gear), which can take off at airports with poor conditions.
  The first Boeing 777-300 was shipped on September 8, 1997, and first flew on October 16, 1997. Boeing 777-300 took off from Payne Airport. After 4 hours of successful flight, it landed at Boeing Airport in Seattle. On May 4, 1998, Boeing obtained the FAA and JAA airworthiness certificates of Boeing 777-30O and the 180-minute double-launch extended flight permit at the same time. It was also the first time in the history of commercial passenger aircraft evidence collection to obtain these three permits on the same day. Boeing 777-300 was officially put into operation on May 27, 1998. It was once the longest twin jet in the world at that time.
  Boeing 777-300ER is a remote type of Boeing 777-300, with many improvements. It uses a GE90-115B engine with higher thrust (thrust 115,300 pounds or 513 kN) to increase the maximum takeoff weight, the maximum takeoff weight is 351.5 tons. The fuselage, wing, tail, front wheel, engine frame and engine Shell are also strengthened. The end of the wing has a highly swept wing tip, the extra fuel tank can carry more fuel. In the case of 365 passengers in the third class cabin layout, the voyage is 14,600 kilometers. Boeing 777-300ER conducted ETOPS flight tests in the Pacific Ocean, with the longest flight of monomotor lasting 6 hours and 29 minutes. 777-300ER first flew on April 24, 2003; Delivered on April 29, 2004. Since the launch of-300ER, most customers have changed from 777-300 to 777-300ER.
Model 777-300, 777-300ER
length 73.90 m
wingspan 60.90 m, 64.80 m
height 18.50 m, 18.60 m
cabin width 5.86 m
maximum number of seats 550, 550
typical seats 368, 368
endurance distance 11,135km, 14,600km
cruising speed: Mach 0.84
maximum takeoff weight 297,550kg, 351,534kg
power unit optional engine model:
PW4098 (thrust 98,000 pounds) or RR Trent 892(92,000 pounds) or GE 90-94B(93,700 pounds)
GE90-115B (for 777-300ER, thrust 115,300 pounds or 513 kN)
maximum fuel capacity 171,170 liters, 181 liters, 280 liters.