Upper limit of the white arc.
Most aircraft have different landing angels dependent on weight, wing shape and stalling speed.
A Clean Stall is happens in the aircrafts normal cruise configuration. A Dirty Stall is occurs in the landing configuration, landing gear, slats, flaps in the landing position.
Depending on the configuration, about 135 knots, or about 155 Miles Per Hour.
Aircraft configuration can mean either the state of the flaps and landing gear or the layout of the cabin.
The average landing speed varies, dependent on the configuration and weight of the aircraft. Specifications call for 155 MPH, 135 Knots or 250 KPH.
All commercial (heavy) aircraft have a range of landing speeds which vary according to landing weight and configuration (flap setting). The normal range for the 747 for various weights and flap settings is around 130 to 160 kts.
During landing, the purpose is to slow down the aircraft's ground speed as slow as you can without it stalling. You want to maintain Lift, not necessarily get more lift. At higher speeds, the aircraft has plenty of Lift. However during landing, the speed is slower and the angle of attack is increased to provide more Lift at lower speeds.
Before setting up for landing pilots follow checklists. The pilot puts the aircraft in a landing configuration. To accomplish this, the throttle is set and the flaps are set to keep the right rate of descent and glide slope all the way down to the runway. On landing configuration It is very normal for pilots to use power to gain or lose altitude and trade altitude for airspeed. Prior to landing the pilot makes one final check to make sure the aircraft is ready to land, specifically the landing gear down. This is all done while listening to air traffic control and following approach plates.
In landing configuration (full flaps), the stall speed is 40 knots (indicated airspeed). With flaps up it is 48 knots.
There are many factors that must be taken into consideration when computing actual landing distance in an aircraft. Some of the more important include weight, airport elevation, landing configuration, landing speed, use of spoilers and/or reverse thrust, etc. The published landing charts for the A380 show landing distances ranging from about 5300 feet for a 670 thousand pound airplane at sea level to 8600 feet for a 970 thousand pound aircraft at 8000 feet elevation.
The An-225 has a 32-wheel landing gear system comprised of two nose bogies and fourteen main wheel bogies (seven per side). Each bogie has two wheels. The link below has a great shot of an An-225 in the landing configuration.
To be the second to orbit the moon and first to travel the moon with the entire spacecraft configuration. They were called the "dress rehearsal" for the actual lunar landing. They had the same spacecraft, they separated the LM and CSM Stack, and the LM descended to within 8 nautical miles of the moon's surface before aborting the landing (as planned) and rejoining the CSM. This proved that everything short of the actual landing worked.