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KBOS
Boston, United States
Runway 33L
Elevation16 ft asl
Weight12,069 lbs
Fuel1,768 lbs
Wind300° · 25 kn · 7 kn cross

Flight Score

64.80 %
KBOS
Boston, United States
Runway 33L
Elevation16 ft asl
Weight12,031 lbs
Fuel1,730 lbs
Wind300° · 28 kn · 7 kn cross
7 Jan 2025 0:03 4 nm Horten Ho229 38 lbs
Departure Score
89.67 %
Enroute Score
11.82 %
Arrival Score
92.91 %

What went well

Touched down at -154 fpm — a soft arrival
Touchdown 1,235 ft in — inside the full-score zone
Threshold crossed at 30 ft and 82 kt — both inside band

What held you back

Enroute Climb — 250 kt exceeded below 10,000 ft, then GPWS warning; speed limits at 0 %, g force -0.13 to 7.62 g at 0 %, −29.39 points
Departure Climb 3 — bank angle up to 47.6 ° at 0 %, −1.72 points
Departure Roll — Runway alignment max 300.7 ft at 0 %, −1.67 points

Next time

Maintain the centreline

See Departure Roll

A small uncorrected heading error at 40 knots becomes a metre of offset per second by 100 knots, noticed only at rotation, producing a crabbed liftoff. Root cause is nearly always eyes on the tape instead of the far end of the runway. Small heading changes displace a distant point visibly long before the nearby centreline stripes look wrong.

Read more in Improve Your Take-Offs

Start to finish · 12 stages, 11 in the score

The flight story

Departure One segment per stage, in flight order — colour is the score band. Drag the bar to move along the flight, or click a stage card to open its detail. Arrival
Departure Roll 80.00Departure roll runway 33L at KBOS Logan International Airport. Takeoff distance 638 ft 7 % of runway. Liftoff speed was 73 kn. Local weather - Temperature 21 °F. Wind 29 kn at 300 °. Crosswind: 8 kn Headwind: 28 kn.
ScoreDescriptionStartProfileEnd
100 % Takeoff distance 638 ft7 % of runway
100 % Liftoff speed was 73 knTarget 75 kn
0 % Runway alignment max 300.7 ft300.3 ft left to 0.4 ft right 300.3 -0.4 ft
100 % Average g force 0.95 g0.90 g min to max 1.02 g 0.98 0.91 g
100 % Takeoff Bounce
Info Average pitch angle 9.6 °7.9 ° min to max 10.7 ° 10.3 9.8 °
Info Average bank angle 1.0 °0.0 ° min to max 1.8 ° 0.3 0.8 °

Events

Info Pitot Heat Switched On 5 ft agl · 19 kt
Departure Climb 1 99.64Departure climb to 50 ft agl from runway 33L KBOS Logan International Airport.
ScoreDescriptionStartProfileEnd
100 % Heading variation 0.2 °0.0 ° min to max 0.3 ° 0.0 0.3 °
100 % Average speed 96 kn74 kn min to max 127 kn 74 127 kn
99 % Average bank angle 1.2 °0.0 ° min to max 2.5 ° 0.9 0.6 °
100 % Average g force 1.00 g0.83 g min to max 1.28 g 0.90 1.28 g
Info Average VSI 383 fpm244 fpm min to max 826 fpm 259 826 fpm
Info Average altitude 17 ft agl0 ft agl min to max 52 ft agl 0 52 ft agl
Info Average pitch angle 8.8 °5.9 ° min to max 12.1 ° 9.7 11.0 °

Events

Info Landing Gear Up 36 ft agl · 117 kt
Departure Climb 2 99.66Departure climb to 400 ft agl from 33L KBOS Logan International Airport.
ScoreDescriptionStartProfileEnd
100 % Heading variation 0.4 °0.3 ° min to max 0.8 ° 0.3 0.8 °
100 % Average speed 128 kn127 kn min to max 132 kn 127 132 kn
100 % Average bank angle 0.9 °0.6 ° min to max 1.8 ° 0.6 0.6 °
97 % Average g force 1.36 g0.41 g min to max 1.62 g 1.30 0.41 g
Info Average VSI 1,666 fpm866 fpm min to max 3,488 fpm 866 3,447 fpm
Info Average altitude 106 ft agl54 ft agl min to max 355 ft agl 54 355 ft agl
Info Average pitch angle 15.4 °11.4 ° min to max 19.7 ° 11.4 12.6 °
Departure Climb 3 79.37Departure climb to 1,000 ft agl from 33L KBOS Logan International Airport.
ScoreDescriptionStartProfileEnd
100 % Heading variation 0.5 °-1.0 ° min to max 1.0 ° 0.9 -1.0 °
100 % Average speed 181 kn146 kn min to max 217 kn 146 217 kn
0 % Average bank angle 20.8 °0.9 ° min to max 47.6 ° 1.4 41.7 °
94 % Average g force 1.06 g0.46 g min to max 1.72 g 0.46 1.72 g
100 % Landing gear up
Info Average VSI 355 fpm-36 fpm min to max 1,448 fpm 1,448 651 fpm
Info Average altitude 408 ft agl402 ft agl min to max 426 ft agl 405 426 ft agl
Info Average pitch angle 2.7 °0.6 ° min to max 5.8 ° 2.6 5.8 °
Enroute Climb 11.82Enroute climb started overhead KBOS Logan International Airport Boston (Massachusetts, United States). Climbing from 472 ft asl to 644 ft asl, an increase of 173 ft in 2 minutes and covering 2 nm.
ScoreDescriptionStartProfileEnd
0 % Average speed 218 kn77 kn min to max 457 kn 222 113 kn
5 % Average bank angle 28.3 °0.0 ° min to max 87.7 ° 34.2 1.1 °
0 % Average g force 1.72 g-0.13 g min to max 7.62 g 1.08 0.44 g
Info Average VSI 94 fpm-3,961 fpm min to max 8,171 fpm 1,144 655 fpm
Info Average altitude 996 ft asl472 ft asl min to max 1,754 ft asl 472 644 ft asl
Info Average pitch angle 1.5 °-14.7 ° min to max 18.5 ° 5.2 1.3 °
Info Turn coordination 00 min to max 0 0 0

Events

Fail Exceeded 250 kn below 10000 ft 540 ft agl
Fail GPWS Warning Activated 994 ft agl · 370 kt
Fail GPWS Warning Activated 939 ft agl · 130 kt
Fail GPWS Warning Activated 654 ft agl · 81 kt
Info GPWS Warning Deactivated 880 ft agl · 425 kt
Info Flaps Position 1 1,665 ft agl · 146 kt
Info Landing Gear Down 1,626 ft agl · 147 kt
Info Flaps Position 2 969 ft agl · 133 kt
Info GPWS Warning Deactivated 798 ft agl · 118 kt
Info GPWS Warning Deactivated 594 ft agl · 94 kt
Arrival Final 2 84.53Approaching runway 33L at KBOS Logan International Airport from 2 nm to 1 nm. Descent from 608 ft agl to 443 ft agl. A decrease of 165 ft in 9 seconds.
ScoreDescriptionStartProfileEnd
62 % Approach angle 4.6 °4.5 ° min to max 5.0 °Target 3.0 ° 5.0 4.5 °
100 % Average speed 108 kn98 kn min to max 116 kn 110 101 kn
100 % Heading variation -0.8 °-0.9 ° min to max -0.6 ° -0.9 -0.6 °
79 % Average bank angle 4.7 °1.0 ° min to max 10.6 ° 3.3 1.0 °
100 % Average g force 1.01 g0.65 g min to max 1.45 g 0.65 1.01 g
Info Average VSI -1,047 fpm-1,722 fpm min to max -638 fpm -638 -778 fpm
Info Average altitude 509 ft agl443 ft agl min to max 608 ft agl 608 443 ft agl
Info Average pitch angle -1.4 °-5.9 ° min to max 1.5 ° -5.2 0.3 °

Events

Fail GPWS Warning Activated 593 ft agl · 110 kt
Info GPWS Warning Deactivated 516 ft agl · 114 kt
11.251.51.752400450500550600Distance to Touchdown NMApproach Height ft11.251.51.752-230-173-115-58058115173230Distance to Touchdown NMApproach Runway Alignment ft
Arrival Final 1 85.71Approaching runway 33L at KBOS Logan International Airport from 1 nm to 0 nm. Descent from 429 ft agl to 38 ft agl. A decrease of 391 ft in 40 seconds.
ScoreDescriptionStartProfileEnd
42 % Approach angle 2.9 °2.1 ° min to max 4.4 °Target 3.0 ° 4.4 2.1 °
100 % Average speed 85 kn81 kn min to max 100 kn 96 83 kn
100 % Heading variation 0.0 °-0.3 ° min to max 0.0 ° -0.3 0.0 °
86 % Average bank angle 1.0 °0.0 ° min to max 8.5 ° 8.5 0.1 °
100 % Average g force 1.01 g0.80 g min to max 1.17 g 1.03 1.08 g
Info Average VSI -473 fpm-889 fpm min to max -253 fpm -795 -431 fpm
Info Average altitude 103 ft agl38 ft agl min to max 429 ft agl 429 38 ft agl
Info Average pitch angle 3.9 °-1.1 ° min to max 5.9 ° 0.8 5.6 °

Events

Fail GPWS Warning Activated 345 ft agl · 86 kt
Fail GPWS Warning Activated 262 ft agl · 88 kt
Fail GPWS Warning Activated 219 ft agl · 95 kt
Fail GPWS Warning Activated 152 ft agl · 89 kt
Fail GPWS Warning Activated 72 ft agl · 82 kt
Info Flaps Position 3 335 ft agl · 84 kt
Info GPWS Warning Deactivated 290 ft agl · 96 kt
Info GPWS Warning Deactivated 236 ft agl · 92 kt
Info GPWS Warning Deactivated 209 ft agl · 97 kt
Info GPWS Warning Deactivated 130 ft agl · 86 kt
00.250.50.751050100150200250300350400Distance to Touchdown NMApproach Height ft00.250.50.751-170-128-85-4304385128170Distance to Touchdown NMApproach Runway Alignment ft
Arrival Landing 95.61Landing on runway 33L at KBOS Logan International Airport, runway length 9,200 ft. Good threshold height. Threshold speed was well above target at 83 kn.
ScoreDescriptionStartProfileEnd
100 % Threshold speed was well above target at 83 kn. Target 75 kn
84 % Landing and flare profile
100 % Heading variation 0.1 °0.0 ° min to max 0.1 ° 0.0 0.0 °
97 % Average bank angle 1.3 °0.0 ° min to max 3.8 ° 0.0 0.7 °
100 % Average g force 1.01 g0.84 g min to max 1.18 g 1.08 0.97 g
Info Average speed 85 kn72 kn min to max 92 kn 83 72 kn
Info Average VSI -159 fpm-422 fpm min to max 18 fpm -422 -149 fpm
Info Average altitude 16 ft agl1 ft agl min to max 31 ft agl 31 1 ft agl
Info Average pitch angle 6.2 °4.2 ° min to max 10.0 ° 5.7 10.0 °

Events

Fail GPWS Warning Activated still on from Arrival Final 1 72 ft agl · 82 kt
Fail GPWS Warning Activated 17 ft agl · 80 kt
Info GPWS Warning Deactivated 25 ft agl · 89 kt
Info GPWS Warning Deactivated 14 ft agl · 80 kt
02505007501,0001,2501,50001123344657Runway Distance ftLanding Height ft02505007501,0001,2501,500-90-72-54-36-1801836547290Runway Distance ftRunway Width ft
Arrival Touchdown 96.58Touchdown distance was good at 1,235 ft. Touchdown speed at 72 kn was a little fast. Touchdown rate was smooth at -149 fpm. Runway touchdown alignment was very good. Local weather - Temperature 21 °F. Wind 28 kn at 299 °. Crosswind: 7 kn Headwind: 27 kn.
ScoreDescriptionStartProfileEnd
98 % Touchdown VSI was -149 fpm.
100 % Touchdown distance was 1,235 ftTarget 1,500 ft
100 % Speed at touchdown 72 knTarget 72 kn
100 % Runway alignment max 6.7 ft6.4 ft left 6.4 6.7 ft
100 % Average bank angle 0.6 °0.4 ° min to max 0.8 ° 0.7 0.8 °
100 % Average g force 1.15 g0.97 g min to max 1.28 g 0.97 1.13 g
80 % Landing Bounce
Info Average speed 69 kn66 kn min to max 72 kn 72 66 kn
Info Average pitch angle 11.5 °10.0 ° min to max 12.5 ° 10.0 12.5 °
Arrival Rollout 100.00Total landing distance 1,472 ft, 16 % of runway. Runway rollout alignment was perfect.
ScoreDescriptionStartProfileEnd
100 % Landing distance 1,472 ft16 % of runway.
100 % Runway alignment max 7.2 ft7.2 ft left to 0.0 ft left 6.7 6.2 ft
100 % Average g force 1.02 g0.93 g min to max 1.11 g 1.11 1.02 g
Info Average speed 36 kn30 kn min to max 41 kn 41 30 kn
Info Average pitch angle 11.9 °11.1 ° min to max 12.5 ° 12.5 12.3 °
Info Average bank angle 0.4 °0.0 ° min to max 1.0 ° 0.9 0.1 °
Runway Exit Exiting runway, average speed 35 kn
ScoreDescriptionStartProfileEnd
Info Average speed 12 kn5 kn min to max 30 kn 30 11 kn
Info Average pitch angle 10.5 °9.2 ° min to max 12.2 ° 12.2 10.3 °
Info Average bank angle 0.5 °0.0 ° min to max 0.9 ° 0.2 0.8 °
Info Average g force 0.99 g0.96 g min to max 1.02 g 1.00 0.99 g

Events

Fail Bounce during touchdown 6 ft agl · 48 kt
Info Flaps Fully Retracted 6 ft agl · 44 kt
Arrival Taxi 95.05Taxiing to the parking from the runway took less than 1 minute. and covered less than 1 nm.
ScoreDescriptionStartProfileEnd
100 % Average speed 11 kn11 kn min to max 11 kn 11 11 kn
100 % Average speed turning corners 0 knmax 0 kn 0 0 kn
100 % Average g force 0.98 g0.98 g min to max 0.98 g 0.98 0.98 g
Info Average pitch angle 10.2 °10.2 ° min to max 10.3 ° 10.3 10.2 °
Info Average bank angle 0.7 °0.7 ° min to max 0.8 ° 0.8 0.7 °

Speed and pitch

From brake release to the end of the climb, against time, then the takeoff point by point.

Lifted off at 73 kt with 10.5° of pitch.

How to read this

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 figure at liftoff is the pitch then. The shaded stretch is Climb 3, the part of the climb scored on holding the climb speed.

240 kt16080020°10°0°LIFTOFF10.5° off8° at 35 ftAIRSPEEDPITCH0102030 sfrom brake release
AirspeedPitchClimb 3

The takeoff, point by point

PointSpeedPitchTime
Brake release0 ft 33 kt 9.9° 0 s
Liftoff264 ft 73 kt 10.5° 5.9 s
35 ft1,213 ft · 8.2 s after liftoff 121 kt 8.1° 14.1 s
End of Climb 34,770 ft · 426 ft 217 kt 5.8° 31.2 s

Takeoff from KBOS 33L

Takeoff roll100.00
638ft7 %
Liftoff speed100.00
73kt
Runway alignment0.00
300.3ft L
Bounce on takeoffOk
None
Rate of climb99.64
383fpm

Side view from the start of the roll to the end of Climb 3 at 426 ft.

Reached 35 ft with 7,259 ft of runway left; then climbing at 1,010 fpm on average to 426 ft.

How to read this

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 shaded stretch is Climb 3, scored on its average speed against the target.

500 ft250 ft0CLIMB 3THRESHOLDRUNWAY END30405060KNOTS ALONG THE ROLLLiftoff 73 kt
On the runwayClimbingLast quarter of the runwayClimb 3

Plan view the roll down the 9,200 ft runway.

Rolled from 727 ft in, never more than 3 ft off the centreline, in 6 kn of crosswind from the left. Airborne 10 % of the way down the runway, before the 75 % line.

How to read this

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. The arrow beside the runway is the crosswind, pointing the way the air was moving, so it pushed the aircraft that way.

2,0004,0006,0008,000THRESHOLDLEFT ↑RIGHT ↓CROSS6 kn75 %widest 3.3 ft LROLL 727 FT INAirborne 991 ft from the threshold
Your trackRunway used in the rollCentreline75 %: lift off before it for full marks
Runway to liftoff 991 ft of 9,200 ft · 11 %
Behind the start of the roll, 727 ftTakeoff roll, 264 ft Left ahead, 8,209 ft

The approach to KBOS 33L

The final from 4 nm.

Profile height against the 3° glideslope, with its 1° band in green.

High from 1.7 nm, where the final began, to 0.6 nm (up to 400 ft over), then back on it to the threshold.

How to read this

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.

5001,0001,5002,000 ft4 nm3 nm2 nm1 nmTHRON SLOPE1,3301,0106903703° GLIDESLOPE · 1° BAND797622274
GlideslopeAllowed bandYou, inside the bandYou, outside itYour height there

Plan distance off the extended centreline, your left at the top, with the 1° band. Sideways distances are drawn 3× larger than distances along the final.

Joined 1,220 ft left of the centreline at 1.7 nm, then drifted 170 ft right between 1.2 and 0.7 nm, then inside the band from 0.7 nm to the threshold.

How to read this

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.

4 nm3 nm2 nm1 nmTHR1000 ft L01000 ft RLEFT ↑RIGHT ↓1° BAND473 ft L169 ft R3 ft L
Extended centreline1° either sideYour trackOutside the band

Landing and touchdown on KBOS 33L

Over the threshold

Threshold height100.00
30ft
Threshold speed100.00
82kt
Centreline offset100.00
0.1ft L

Touchdown

Past threshold100.00
1,235ft
Centreline100.00
6.7ft L
Speed100.00
72kt
Touchdown rate98.30
-154fpm
Impact100.00
1.28G
Bounces80.00
1
The crosswind

5 kt across from the left, which takes about 4° of crab to hold the centreline at 72 kt. Touched down with 3° of it still on, wings level.

Wind 300° at 28 kt · 27 kt head · 5 kt across

How to read this

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.

The stop

From 44 kt at touchdown to taxi speed (30 kt) in 4 s, an average deceleration of 0.19 g.

How to read this

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.

020406030 kt · 242 fttouchdown300 ftkt
Your ground speed60 kt and taxi speed

Side view — the last 5,000 ft of the approach.

Crossed the threshold at 30 ft, 20 ft below the 50 ft target. Touched down 1,235 ft in, 235 ft past the ideal 1,000 ft.

How to read this

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.

30 ft over the threshold · target 50 ft FLARE NORMALLY STARTS 11–45 FT 80 ft400 −149 fpm · 10° nose up · 72 kt Ideal — 50 ft, down at 1,000 ft This flight — 30 ft, down at 1,235 ft

Sink and pitch — through the flare, lined up with the side view.

From 30 ft the descent stopped and turned into a climb of 100 fpm before coming down at 150 fpm to touch. The nose came up 4.3° on the way down.

How to read this

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.

SINK RATE FPM · 0 IS LEVEL, LOWER IS COMING DOWN FASTERPITCH · HIGHER IS NOSE UP0−500−1,0000°6°11°touchdown−149 fpm at touchdown10° at touchdown
Sink ratePitchFlare began, descent slowedTouchdown

Plan view — the first 5,000 ft of the 9,200 ft runway, to the same scale as the side view.

Touched down 7 ft left of the centreline, and stayed within 7 ft of it down the rollout.

How to read this

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.

1,0002,0003,0004,0005,000 THRESHOLD LEFT ↑ RIGHT ↓ CROSS 5 kn FULL SCORE TO 1,650 FT 1,235 ft past threshold ROLLOUT ENDED
Your trackTouchdownRolloutCentreline

The 1,235 ft touchdown sits inside the full-score zone. The 1.28 G arrival bounced.

Runway used 1,426 ft of 9,200 ft · 16 %
In the air over the runway, 1,235 ftRollout, 191 ft Left over, 7,774 ft
Rollout distance100.00
191ft16 % used
Rollout alignment100.00
7.2ft L

The rest of the report

Explore in detail

Flight narrative

The Horten Ho229 aircraft departed from runway 33L at KBOS Logan International Airport, taking off with a distance of 638 feet, which accounted for 7% of the runway. The aircraft lifted off at a speed of 73 knots, and the local weather conditions at the time of takeoff were characterized by a temperature of 21 degrees Fahrenheit, with a wind speed of 29 knots coming from a direction of 300 degrees. This resulted in a crosswind of 8 knots and a headwind of 28 knots.

As the aircraft climbed away from the airport, it began its enroute climb, reaching an altitude of 644 feet above sea level, an increase of 173 feet from its initial altitude of 472 feet. This climb was achieved in just 2 minutes, covering a distance of 2 nautical miles. The aircraft continued its climb, eventually reaching a point where it began its final approach to runway 33L at KBOS Logan International Airport.

The final approach was made from the southeast, with the aircraft heading in a direction of 312.0 degrees at an altitude of 608 feet above ground level and a distance of 1 nautical mile from the runway. The aircraft then began its descent, touching down on the runway with a distance of 1,235 feet, which accounted for 16% of the runway's length. The touchdown speed was slightly higher than the target speed, at 83 knots, but the touchdown rate was smooth, at -149 feet per minute.

The runway touchdown alignment was very good, and the aircraft's rollout alignment was perfect. The taxiing process to the parking area from the runway took less than 1 minute and covered a distance of less than 1 nautical mile. The total flight distance was 4 nautical miles, and the flight duration was 3 minutes. The aircraft used a total of 38 pounds of fuel during the flight.

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