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MY FS FLIGHTS
Flight Score
Shorten the long landing
Ground effect becomes significant below about one wingspan of height. A Cessna 172, with a 36 ft span, enters ground effect at flare height - the float it feels in the hold-off is ground effect arriving on cue. An A320, with a span around 117 ft, has been in ground effect since before the threshold and there is no sudden cushion to feel, only a gradual reduction in induced drag that lengthens any float you allow.
Read more in Flare TimingStart to finish · 18 stages, 16 in the score
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From brake release to the end of the climb, against time, then the takeoff point by point.
Rotated at 148 kt, 6 kt above the 142 kt target, and lifted off at 153 kt 1.9 s later, the nose coming up at 3.9° a second. Climb 3 averaged 166 kt, 13 kt under its 179 kt target.
Two traces from brake release: the airspeed on top, and below it the pitch, which is how far the nose is above the horizon. The dashed green line is the speed to rotate at for this aircraft at its weight, and the green dot is where the nose started to come up. The figures at liftoff are the pitch then and how fast the nose came up, in degrees a second. The shaded stretch is Climb 3, the part of the climb scored on holding the climb speed.
The takeoff, point by point
Side view from the start of the roll to the end of Climb 3 at 905 ft.
Reached 35 ft with 5,907 ft of runway left; gear up at 268 ft, inside the 400 ft that gets full marks; then climbing at 2,140 fpm on average to 905 ft.
The takeoff from the side: the height above the runway against the distance along it. The numbers along the runway are the speeds reached at each point. Lifting off in the amber last quarter of the runway costs marks for the roll length. The gear-up ring is coloured by its mark. The shaded stretch is Climb 3, scored on its average speed against the target.
Plan view the roll down the 11,550 ft runway.
Rolled from the start of the runway, drifted 6 ft right of the centreline and was back on it to lift off. Airborne 40 % of the way down the runway, before the 75 % line.
The roll from above, with your left at the top. The line is where the wheels went, and "widest" is the furthest you drifted off the centreline. Lifting off before the amber 75 % line gets full marks for the roll length.
Two stabilised approach gates, each with seven checks, where the approach path is 1,000 ft and 500 ft above the runway. They are the approach's score: the checks passed out of the checks that ran.
When the approach was stable
Every check met from 4 nm to the threshold.
Each line is one of the gate checks, run along the whole final rather than only at the gates: green where it would have passed, amber where it would not. The glideslope, centreline and speed lines use the bands in the charts beside this card. The sink rate is allowed what the glideslope needs at your ground speed plus 600 fpm, the wings 10° of bank, and the gear and flap are read from when you moved the levers. The bottom line is green where every check held at once, ignoring blips shorter than 0.2 nm, and the sentence above it says from where it held to the threshold. A ring is a stabilisation gate, where the checks in the table were taken.
The final from 4 nm, with the stabilisation gates on it.
Profile height against the 3° glideslope, with its 1° band in green.
Inside the glideslope band from 4 nm to the threshold, never more than 60 ft below the slope.
Your height above the runway against the distance still to go. The glideslope is the steady descent path to the aiming point, 1,000 ft past the threshold: 3° here, which is about 320 ft for every nautical mile out, crossing the threshold at about 50 ft. The row under the distances is the height it puts you at. Inside the green band your path is drawn green; outside it, amber. A ring is a stabilisation gate: green when every check there passed, amber with the failed checks named beside it.
Plan distance off the extended centreline, your left at the top, with the 1° band. Sideways distances are drawn 13× larger than distances along the final.
Inside the 1° band all the way from 4 nm, never more than 100 ft off the centreline.
Looking down from above, flying left to right towards the runway: up the page is left of the centreline, down is right. Sideways distances are stretched so that small drifts show, so a line that looks wild here may be only a few tens of feet. The labels are how far off you were at each distance, amber when outside the band.
Speed against the approach speed. The green band runs from 5 kt slow to 35 kt fast at the 1,000 ft gate, closing to 21 at 500 ft and 10 at the threshold.
Inside the speed band all the way, between −1 kt and +12 kt on the approach speed of 138 kt.
Your indicated airspeed down the final, against the approach speed for this aircraft at its landing weight. The band allows 5 kt slow and more on the fast side further out, closing as you get lower, because the speed is expected to come off on the way down. The figures are knots above (+) or below (−) the approach speed.
Over the threshold
Touchdown
Excellent landing flare. It lost 2.7 points, for the nose going up and down 3 times.
5 kt across from the right, which takes about 2° of crab to hold the centreline at 135 kt. Touched down with the nose 3° into wind, wings level.
Wind 344° at 9 kt · 6 kt head · 5 kt across
The wind is the one recorded at the landing, split along the runway (headwind or tailwind) and across it. To hold the centreline in a crosswind the nose points a little into wind - the crab - and is straightened with rudder just before the wheels touch, often with the into-wind wing lowered to stop the drift. These are the nose against the direction you were actually moving, and the wings, at the moment of touchdown. Shown for reading; not marked.
From 126 kt at touchdown to taxi speed (30 kt) in 15 s, an average deceleration of 0.35 g.
Your ground speed from the moment the wheels touched until you were down to taxi speed, against the distance rolled. A steep line is hard braking, a shallow one a long, gentle roll. For scale, an airliner's lowest autobrake setting decelerates at about 0.15 g, a medium one about 0.3 g. Shown for reading; not marked.
Side view — the last 5,000 ft of the approach.
Began the flare at 43 ft, 65 ft before the threshold; crossed the threshold at 38 ft, 12 ft below the 50 ft target. Touched down 1,739 ft in, 739 ft past the ideal 1,000 ft.
The last stretch of the approach and the touchdown, from the side. The height is stretched so that the last few feet show: 80 ft top to bottom, against 5,000 ft across. The dashed line is the ideal, 50 ft over the threshold and down 1,000 ft in. The flare ring is where you began raising the nose, and "descent slowed" is where the sink came off; the figures beside them are the sink rate, pitch and speed at that point.
Sink and pitch — through the flare, lined up with the side view.
The sink went from 680 fpm at the flare to 180 fpm at touchdown. The nose went down 3.9° on the way down.
Lined up with the side view above, so a point on one sits under the same point of the other. On top, how fast you were coming down: 0 is level, and −600 is 600 ft a minute down. Below, the pitch. In a flare the nose comes up and the descent slows towards 0. The figure at the touchdown line is your touchdown rate.
Plan view — the first 5,000 ft of the 9,989 ft runway, to the same scale as the side view.
Touched down 7 ft left of the centreline, and stayed about there down the rollout, 16 ft right at the widest.
The runway from above, with your left at the top. Touching down inside the green bracket scores full marks for the distance. The shaded part is the rollout, up to where it ended. The arrow beside the runway is the crosswind, pointing the way the air was moving, so it pushed the aircraft that way.
Touched down 1,739 ft past the threshold — beyond the full-score zone. The arrival was smooth.
The rest of the report
The Boeing 737-800 taxied from the parking area to runway 28R at KSFO, a movement that lasted 14 minutes and covered 3 nm.
Takeoff was performed on runway 28R. The aircraft used 4,705 ft of runway, which is 41 % of the available length. Rotation occurred at 148 kt. Local weather was 63 °F with a wind of 7 kt from 305°, giving a 1 kt cross-wind component and a 7 kt head-wind component.
Initial climb to 1,000 ft agl took 23 seconds, averaging 2,011 fpm and reaching 171 kt at the top of the segment.
The climb continued from 965 ft asl to 36,720 ft asl in 18 minutes, covering 117 nm and passing overhead San Bruno.
Level flight was maintained at 37,000 ft asl for 155 minutes, covering 1,136 nm, beginning 6 miles south-east of Foresthill.
Descent from 37,000 ft asl to 2,086 ft asl lasted 33 minutes and covered 164 nm, beginning 2 miles south-east of Hendricks, with a brief level-off at 8,000 ft asl.
On final approach to runway 30L at KMSP, descent from 1,348 ft agl to 30 ft agl took 108 seconds. Stabilisation checks at 1,000 ft and 500 ft above the runway were met for gear down, landing flap, sink rate, glideslope, centreline, speed and wings level. Configuration was gear down at 2,087 ft agl at 176 kt and final flap position 7 at the same altitude and speed.
Landing was made on runway 30L, whose length is 9,989 ft. The threshold height was good and the threshold speed was 144 kt. The flare was described as excellent. Touchdown occurred 356 ft beyond the touchdown zone at 135 kt, with a vertical rate of minus 185 fpm and very good alignment. Local weather was 50 °F with a wind of 9 kt from 344°, giving a 6 kt cross-wind component and a 6 kt head-wind component. No bounce was observed.
Total landing distance was 3,289 ft, representing 33 % of the runway, and rollout alignment was very good.
The aircraft taxied from the runway to the parking area in 4 minutes, covering less than 1 nm.
Overall, the flight covered 1,426 nm in 226 minutes and consumed 17,942 lb of fuel.
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