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MY FS FLIGHTS
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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 · 13 stages, 11 scored
Events
Events
Events
The threshold, the flare and the hold-off. The approach that led to it is the stabilisation gates below.
One stabilised approach gate: five checks where the approach path is 500 ft above the runway. The 1,000 ft gate was not assessed, because the approach did not join final that far out.
Side view — the last 2,698 m of the approach.
Plan view — the first 2,698 m of the 3,371 m runway, to the same scale as the side view.
Touched down 2,332 m past the threshold — beyond the full-score zone. The arrival was smooth.
The rest of the report
This flight began with a taxiing period from the parking area to the runway, which took 7 minutes and covered a distance of 2 nautical miles. The aircraft then departed from runway 28L at San Francisco International Airport (KSFO), with a takeoff distance of 194 meters, which accounted for 6% of the runway. The liftoff speed was 66 knots.
The local weather conditions at the time of takeoff were characterized by a temperature of 10 degrees Celsius and a wind speed of 5 knots from a direction of 270 degrees. This resulted in a crosswind of 2 knots and a headwind of 5 knots. The aircraft then began its enroute climb, starting overhead San Bruno, California, and rising from an altitude of 571 feet above sea level to 540 feet above sea level, an increase of 31 feet, in less than 1 minute and covering a distance of less than 1 nautical mile.
Following the enroute climb, the aircraft entered a level cruise phase, also starting overhead San Bruno, and lasted for 3 minutes, covering a distance of 3 nautical miles. The final approach to runway 28L at KSFO was initiated from the east, with a heading of 293.0 degrees at an altitude of 93 feet above ground level and a distance of 0 nautical miles from the runway.
The landing on runway 28L was characterized by a threshold height that was above the target, and a threshold speed that was excessively high at 93 knots. The touchdown point was located very far down the runway, using more than 50% of the available runway, and the touchdown speed was fast at 71 knots. However, the touchdown rate was excellent at -64 feet per minute. The runway touchdown position was misaligned by 14.2 meters from the centerline, and the runway rollout alignment was slightly misaligned by 13.8 meters from the centerline.
The local weather conditions at the time of landing were the same as those at the time of takeoff, with a temperature of 10 degrees Celsius and a wind speed of 5 knots from a direction of 270 degrees, resulting in a crosswind of 3 knots and a headwind of 5 knots. The total landing distance was 2,596 meters, which accounted for 77% of the runway. The total flight distance was 9 nautical miles, and the flight duration was 13 minutes. The aircraft used 212 kilograms of fuel during the flight.
The Turbo Porter aircraft has successfully landed at San Francisco International Airport (KSFO) on runway 28L, but the landing was not without its issues. The aircraft's final approach was from the east, heading 293.0° at an altitude of 93 feet above ground level (agl) and 0 nautical miles from the runway. The landing was made on a runway that is 3,371 meters long, which provided a sufficient amount of space for the aircraft to touch down and come to a stop.
However, there were several areas of concern during the landing. The threshold height at 69 feet agl was above the target height, indicating that the aircraft was not properly configured for landing. Additionally, the threshold speed was excessively high at 93 knots, which is faster than the recommended speed for landing. This excessive speed may have contributed to the long touchdown point, which used more than 50% of the available runway.
The touchdown speed of 71 knots was also faster than recommended, and the touchdown rate of -64 feet per minute (fpm) was excellent, but not enough to compensate for the other issues. The runway touchdown position was misaligned by 14.2 meters from the centerline, which may have been due to the pilot's difficulty in aligning the aircraft with the runway. The local weather conditions, with a temperature of 10°C and a headwind of 5 knots, may have also played a role in the difficulties experienced during the landing.
The total landing distance of 2,596 meters was 77% of the available runway, which is a relatively long distance. The runway rollout alignment was also slightly misaligned by 13.8 meters from the centerline, which may have been due to the pilot's difficulty in maintaining control of the aircraft during the rollout phase. Overall, while the Turbo Porter aircraft was able to land safely, the landing was not without its issues, and the pilot may need to work on improving their skills to achieve a more precise and controlled landing.
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