Once you reach 80 knots, the rudder becomes effective, allowing you to basically steer your plane on the runway. Takeoff speed callouts (80kts and 100kts) are used to make sure both airspeed indicators match; if not it'll indicate a fault in the system. Do pilots and co-pilots always fly together?
A: The 80-knot call is to ensure that both airspeed indicators are functioning and indicating properly. The rudder is becoming effective at that speed, too. Q: Do any runways come to mind that are too short to abort a takeoff having almost reached takeoff speed? — Jeff, Stuart, Fla.
Also known as a nautical mile, knots are measurements that planes and ships use to measure speed. One Knot per hour equals 1.15 miles per hour.
An average commercial jet accelerates to between 120 and 140 knots prior to liftoff. To do this in 30 to 35 seconds requires a good sustained acceleration. This is something that pilots look for during a takeoff roll.
Knots, on the other hand, are used to measure speed. One knot equals one nautical mile per hour, or roughly 1.15 statute mph.
On average, the typical cruising speed of a large commercial aircraft, like a Boeing 747, is somewhere between 475 and 500 knots (roughly 575 mph). So what is the cruising speed of a 747? Depending on passenger load, the average cruise speed of a 747 is 490 nautical miles or Mach 0.85.
With this in mind, horizontal winds (also known as “crosswinds”) in excess of 30-35 kts (about 34-40 mph) are generally prohibitive of take-off and landing. As far as how this happens, it depends on where you are in flight.
B777 Landing Speed
A typical landing speed (or speed over the threshold known as VREF) at a landing weight of 190,000 KGS is approximately 135 kts or 155 mph.
Some typical airspeeds
Boeing 737 NG/MAX: Mach 0.78, about 450 knots true airspeed. Airbus A320 family: Mach 0.78, about 450 knots true airspeed. Boeing 787 Dreamliner: Mach 0.85, about 488 knots true airspeed.
While most of us on the ground are used to measuring speed in kilometers or miles per hour, pilots use a different unit of measurement: Nautical miles per hour - also known as knots.
Cruising. For most commercial airliners, the airplane's cruising speed ranges between 550 and 600 mph (478 to 521 knots).
Boats and planes, which often travel longer distances affected by the earth's curvature, use knots. Knots are a more accurate way of predicting how a boat (or a plane) traverses the face of the earth. That's why nautical charts include and depend on longitude and latitude measurements.
But if you've ever felt compelled to applaud the pilot for landing safely, think again. Pilots actually hate it when passengers clap. According to a Q&A on internet forum Quora, Scott Kinder, who identified himself as a 737 captain of a major US airline, said it is ignorant. “Don't even think about it.
The launch salute highlights the unspoken bond between ground crew and aircrew. One common motion that echoes trust, comradery and dedication to national security. This salute is where Sustainment and Global Readiness is personified.
Speed and being close to the ground are the cause of many airplane incidents. And you won't come any closer to the ground than in takeoff! According to a study from Boeing, on average, a rejected takeoff will be performed for every 3000 successful takeoffs.
An Airbus A 380 has a take-off speed of approximately 270 k m / h . After taxiing to the runway, it stops ready for take-off.
An A380 crosses the landing threshold at a docile 140 knots and touches down, depending on its landing weight, at a speed as slow as 130 knots, about the same touchdown speed of some corporate jets that weigh 1/50th as much as the world's biggest airliner.
The top speed of the Boeing 747 itself is about 570 mph, and this flight maxed out at 825 mph. The difference between “ground speed” (zero bonus) and “air speed” (200+ mph bonus) is also why this speed, while technically faster than the speed of sound, didn't ever go supersonic.
There is no single maximum wind limit as it depends on the direction of wind and phase of flight. A crosswind above about 40mph and tailwind above 10mph can start to cause problems and stop commercial jets taking off and landing. It can sometimes be too windy to take-off or land.
There is no real limit to wind speeds a plane can handle, if the wind is coming down the runway. Maximum crosswind component will be in the operating manual, and can be anywhere from perhaps 15–30+ knots, depending on the aircraft and runway conditions.
Wind is an important consideration for pilots during a flight, but it may not only be for the reasons you're thinking. Aircraft always try to land and take off into the wind in order to minimize the speeds needed to get airborne or come to a stop.
As the plane descends into ground effect, it may actually accelerate if the engines are producing enough thrust, since in ground effect the plane requires much less power to keep "flying". Power from the engines will translate into speed, if not height.
Lufthansa previously bragged that its 747-400 could reach the highest altitude in its fleet, with a maximum service ceiling of 44,947 ft (13,610 m). The German flag carrier also flies the modern 747-8, which has a service ceiling of 43,100 ft (13,137 m).
The approx. 10,700 feet Wikipedia figure is for a fully loaded 747 at sea-level. The lighter the plane, the less runway it needs.