Phrak
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TurtleMeister said:I'm not a real pilot but I have a lot of hours with the 747 in MS Flight Sim. For takeoff I use 5 or 10 degree flaps. Takeoff and landing speeds can vary and depend to some extent on loading. I usually start my rotation at around 150 IAS. For landing I gradually decrease speed and extend flaps one notch at a time as I reach the maximum safe speed to do so. One of the quirks of the 747 is that it's difficult to slow it down when you're in a decent. Just cutting back on the throttle won't do it so I have to use the speed brakes. I try to get my air speed down to about 170 IAS before I enter the glide slope on final. I could go down to 160 or even 150, but fully loaded the 747 will stall at just under 150 so I like to some margin of safety. And higher speeds give you better control. Once established on final and I'm into the glide slope I lower the gear and go to full flaps (30). The main purpose of flaps when landing is to put the aircraft at a more level angle. If I could not use flaps on landing I would not be able to see the runway, unless I increased air speed to bring the nose down.
As someone has already mentioned the "go around" is pretty routine and normal. It even happens in flight sim. If the plane landing in front of me is too slow exiting the runway or if I'm just coming in too fast behind him then I will get a "go around" from the control tower.
From what I've been gathering the changes required between takeoff and landing are increasing throttle, retracting the speed brakes and decreasing flaps by 10 degrees. The flaps and speed brakes may take 15-20 seconds to change setting.
It looks as though, full flaps on takeoff will prevent the 747 from rotating nose up for takeoff. You might try it in your simulator to see how it reacts.
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