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The stall speed of an aircraft depends on its altitude, weight, configuration, and lateral and vertical acceleration. The stall speed for a 777 is dependent on these real-time factors.
777-200 136kts 156mph 777-200ER 139kts 160mph 777-200LR 140kts 161mph 777-300 149kts 171mph 777/300ER 149kts 171mph The actual touchdown speed depends on the load of the plane. If it is heavily loaded with passengers and fuel it will land faster than if it is almost empty and had few passengers.
Typically, an approach is flown at about 15% greater than stall speed. If the target approach speed of the crashed Asiana flight is publiscized at 137 knots, then its stall speed would be about 120 knots (or about 138 mph).
This varies with the weight of the aircraft, flap positions, weather conditions etc., but the stall speed of your average Boeing 777-200ER with a normal loading of passengers (about 300) on final approach would be around about 140mph.
The Boeing 777-300 has an empty operating weight of 160,500 kg (353,800 lb). Fully loaded, the maximum take off weight is up to 299,370 kg (660,000 lb)
The max. speed of the Boeing 777 is 590 mph.
A Boeing 777 takes off at a speed of about 195 miles per hour.
The top speed of a Boeing 777 is: 0.89 Mach / 590 mph / 950 km/h / 512 knots.
Maximum speed of the Boeing 777 is as follows: 0.89 Mach / 590 mph / 950 km/h / 512 knots.
148 knots
250 km/hr.
140knots is normal