胜道博岳国际卡丁车场(丰台店)🏎 4T 200cc7 laps · 6 valid2026-05-04 21:53TRACK PB
Fastest lap
1:09.16
Lap 6 · V max 83.0 km/h
Patch-best · near-term
1:08.60 −0.56s
Physical ceiling · motivational
−6.44s
Patch-best = stitch each segment’s own best (proven doable); physical ceiling = every corner at the grip limit (still to train). The latter already includes the former — not additive; the true ceiling ≈ 6.44s.
Lap consistency · CV
3.4%STABLE
Steady rhythm — focus improvement on corners
GPS quality NOISY · 22775 frames · 286 despiked · 25.0 Hz
Fix first today fix one corner, win the lapT3
T3 braking is too early — brake 3m later for more speed
This corner alone0.12s/lap
How to read this screen: the fastest lap is today’s result; the patch-best tells you how much is left by just stitching each segment’s best. The real headroom is the line work — scroll down to L1 to see exactly which corners lose time.
📡 GPS data quality notice
This session's GPS signal had significant interference. 286 / 22775 frames (1.3%) position spikes detected (single-frame displacement up to 1019.9× physical expectation). Auto-fixed with linear interpolation from neighboring frames — lap time / lap split / sector calculations are unaffected, but visual precision of racing line is still limited by underlying data.

Common causes: track close to water (GPS multipath reflection) / few satellites (<10) / phone signal blocked during recording. Next time, recommend placing phone in open-view position.
L1Where time is lostLocate which segment / corner. Not why yet.
LAP TIMES & PHASERACING laps only join optimization
LapTime (s)V maxV minV avgArc (m)Phase
L1
75.44+6.28
78.920.658.01216.9RACING
L2
70.12+0.96
85.838.562.41214.4RACING
L3
69.20+0.04
86.243.563.21214.7RACING
L4
70.24+1.08
85.839.962.01209.6RACING
L5
69.92+0.76
85.538.462.41211.6RACING
L6
69.16BEST
83.044.063.01208.5RACING
L7
90.40+21.24
84.40.048.81224.7INCIDENT
📐 What does Phase mean
Every lap is classified into one of six categories, so you can immediately tell "which laps are actually racing":

RACING: real racing laps, included in all optimization advice and comparisons.
WARMUP: opening laps, speed hasn't built up yet.
COOLDOWN: closing laps, already winding down.
INCIDENT: laps with a mid-lap stop (vmin near 0) — could be a crash, off-track, yielding, red flag, or marshal stop. Safety first — review what happened.
GPS NOISE: laps with many GPS position spikes (e.g. red lines flying off the track on the map). Trajectory and distance are unreliable, excluded from analysis.
NON-KART: not driving data at all (walking in pit / handling equipment).

The last five categories don't participate in lap-time comparisons — they're only shown for session completeness, avoiding polluting the analysis.
📉 Lap evolutionwarmup / fade / mistakes
Lap time vs lap number — spot tyre warmup, fatigue fade and mistake laps. Cooldown laps are excluded to keep the axis readable.
🏁 Sector composition
Split the lap into 3 sectors to locate which one drags the lap; each flags the corner most worth practicing.
S1
Corners: T1T2T3T4T5T6T7T8T9
0–36% · len 433m
▸ Focus: T3 · T5
23.32s
BEST @ L3
S2
Corners: T10T11T12T13T14T15
36–67% · len 375m
20.08s
BEST @ L5
S3
Corners: T16T17T18T19T20
67–100% · len 401m
▸ Focus: T19
25.20s
BEST @ L6
👻 Ghost Lap · realistic best
Stitch each lap’s fastest S1/S2/S3 into one lap = a target you can actually hit.
realistic best
0s
📐 What does Ghost Lap mean
Your actually achievable target lap time.

The idea is simple: you've already driven the fastest S1, fastest S2, fastest S3 in different laps — stitching those three best segments into one lap gives you the Ghost Lap. It's not fantasy; it's capability you've already demonstrated.

The other number, Sum of Corner Gaps, is the physical upper bound "if every corner were driven perfectly" — reference value, not realistic, because corners constrain each other.

Treat Ghost Lap as your target, Sum of Corner Gaps as motivational ceiling.
🛰 Track map · mini-sector
Lap split into 24 equal-distance segments; each colored by how much slower it is than that segment's own fastest across all laps. Purple = segment-best, green→yellow→red = bigger loss. Pick a lap below to recolor; toggle the satellite view for real imagery.
Pick a lap
segment-best
bigger loss →
🏁 S/F corner sector top spd
📐 What does Track Map show
Overhead view of the track, with every lap's actual trajectory drawn on a satellite basemap.

Different colors = different laps, easy to compare racing lines.
Orange glowing dots = coast hesitation, marking segments where you neither braked nor accelerated — these are usually places where you're losing lap time for no reason.

After other modules pinpoint a problem, come back to this map to see exactly which corner it happens at.
🔥 Sector × Lap time deltagreen=fastest · redder=slower
Rows = sectors, columns = laps; cell = how much slower than that sector’s own fastest lap. ★ = fastest.
📐 What does this heatmap show
Helps you answer: "A specific lap was slow — slow in which sector?"

X axis = laps, Y axis = sectors. Greener = better performance in that sector (★ = sector's fastest); redder = more behind.

For example, if one lap is 0.4s slow overall and the heatmap shows S2 alone is 0.3s slow, then improvement should focus on corners in S2, not generic "drive faster".
🎯 Corner improvementsorted by savable time
How much faster the apex still can be (speed ceiling). Continuous corners (e.g. T2←T1) improve at the *previous* corner.
Potential is estimated from GPS-fitted corner radius (medium confidence) — focus on *which* corners to practice; absolute seconds are indicative.
L2WhyPer-theme deep dive: data + matched advice.
A
📈 Speed + Δ time
Where did speed not keep up, and how much time piles up there?
83.0 km/h
Top speed
Two stacked plots: top = speed, bottom = Δtime vs the fastest lap. Shared lap legend — click a lap to toggle both.
Speed (km/h)
Δ time vs fastest (s)
📐 What does this chart show · Reading the Δ Time subplot
Every lap's speed at the same track position is overlaid, so you can see "at a specific spot on the track, exactly where is the gap between the fastest lap and your lap".

X axis is relative track position (lap start to lap end), not time — so laps of different speeds can still be directly overlaid at the same corner apex.

Top — Speed (km/h): each line is a lap's speed curve.
  • Bold green ★ = best lap
  • Normal brightness = the next 3 fastest laps
  • Semi-transparent background = other valid laps (still shows the "spread band" width without stealing focus)
  • Click legend to toggle any lap on / off

Bottom — Δ Time vs Best (s): standard "where am I losing time" view used by MoTeC i2 / FastF1.
  • Y axis = cumulative time this lap is behind best lap at this position (green dashed = 0 = best itself)
  • Slope going up (more positive) = this segment you're slower than best, steeper = losing more
  • Flat / down slope = this segment you match or beat best
  • The steepest ramp = where you're losing time on this lap (usually a specific corner)

Clicking the legend toggles a lap — both subplots show / hide together (shared legendgroup).

Gold S1 / S2 / S3 labels and faint bands at the top map to the three sectors above — so you can directly locate a curve segment to a specific sector and its corners.
B
🏁 Racing line · best vs worst
Same corner — how do your best and worst lines differ? Apex early or late?
Best (green) vs worst (red) line for each top corner, ★ = apex.
📐 What does this chart show
Picks the "3 corners with highest potential" and overlays your best lap and your worst lap on the same chart, so you can directly see "what line I took when I got it right, and what line when I got it wrong".

Green = best lap's trajectory at this corner, red = worst lap's; ★ = that lap's apex.

Seeing the difference between the two lines (entry point, apex, exit direction) is the most direct way to turn potential into result.
C
🔄 Grip · friction circle (G-G)
How much grip do brake / accel / cornering actually use?
hardware IMU
G-G scatter: X = lateral G (left↔right), Y = longitudinal G (brake↑ accel↓). Outer points = more grip used.
📐 First time? 30-second guide

This chart tells you "how much of your tire's grip you actually used".

Principle (10 sec)
Total tire grip is fixed. You ask it to do 3 things: accelerate (throttle) / decelerate (brake) / turn. Do several at once, each gets less. The usable limit drawn out is a circle — that's the "friction circle". Good driving = always at the circle's edge (using all grip); conservative = clustered near center (wasted).

How to read (axes and forces)
• X axis = cornering G. Right = right corner, Left = left corner.
• Y axis = decel/accel G. Up = braking, Down = accelerating.
• Each dot = an instant on your best lap, color matches which corner (T1-T12, gray = straight).
Red dashed circle = your session's grip limit.
• Gray thin dashes = 0.5g / 1g / 1.5g reference circles.

What problems can you spot (4 signal types)

  • Crowded center, sparse edge — grip underused, driving conservatively / not pushing hard.
  • Empty bottom (sparse lower half) — no trail braking, you "brake then turn", losing 0.1-0.3s/corner (most common issue).
  • Missing half of left/right semicircle — that direction's corners aren't using full grip (track-biased / you fear that direction).
  • Too flat vertically (narrow top-bottom) — brake/accel intensity both weak. Karting has smaller longitudinal G than lateral (engine torque limited) which is normal, but near-zero longitudinal spread needs diagnosis: check your hardest brake — under 0.4g for the whole session means car/tire/surface physical limit (drum brake / rental kart common), not your problem; 0.5g+ peak but persistent 0.2g means soft brake style, you can push harder.

How to improve (specific actions)
1. Main gap = bottom (insufficient trail brake): see "weak corners" at top. At these corners you brake-then-turn. Try: in the last 0.5-1s before entry, keep light brake while starting to turn (release brake a beat later than steer-in). This shifts weight to front tires, increases grip, allows higher entry speed.

2. Main gap = accel phase: hesitation between brake-release and full throttle on exit. Try: on exit go straight to full throttle, let car find its own limit.

3. Main gap = one side's corners: in that direction, push harder, steer to limit, see if car understeers (understeer = true limit).

Note: G values inferred from GPS speed + heading (no IMU). After 0.2s smoothing + extreme clipping, karting scenario error ±5%. Only A-type braking corners count for trail brake evaluation; K-type high-speed kinks don't brake and don't count.

D
🎯 Consistency · Apex
Can you reproduce your best lap's moves every lap?
Unlike L1 (how much faster you could go), this asks: can you replicate your best every lap?
📐 What does this chart show · Reading the boxplot
One boxplot per corner, showing distribution of apex speed across all laps at that corner — the standard visualization used by FastF1 / PITWALL and other F1 lap-time analysis tools.

How to read:
  • Box (cyan rectangle) = Q1-Q3, middle 50% of lap distribution
  • Solid white line = median (typical level)
  • Dashed white line = mean
  • Top / bottom whiskers = extremes (excluding outliers)
  • Dots = each lap (hover to see which L#)
  • Gold ★ = best lap's apex speed at this corner (capability ceiling)
Note: worst lap not marked separately — whiskers already show the extreme range, double-marking would clutter.

How to use:
  • Narrow box: strong apex-speed repeatability at this corner (steady rhythm)
  • Wide box / long whiskers: unstable, big lap-to-lap variation → improvement focus
  • Gold ★ far above median: you've done it once — there's room to bring the slower laps up
  • Outliers (dots far from box): a specific lap had an incident at this corner (crash / yield / error) — hover to see which lap
  • Distribution biased high / low: high = most laps near best; low = most laps lagging
E
📊 Driver profile · radar
What kind of driver are you? Strengths and weak spots?
  • 💪Strength · Exit Throttle79/100This dimension is your top strength.
  • 🎯Improve · Aggressiveness51/100You can push one notch harder on brake / accel — there's more grip headroom than you think, dare to try harder next time.
  • 🎯Improve · Apex Discipline53/100Each lap's apex position can be more consistent — treat brake → turn-in → apex as one fixed sequence, copy best lap's rhythm.
📐 What do the 6 dimensions mean
This session's "driving fingerprint", showing strengths and weaknesses at a glance:

  • Aggressiveness: how hard you brake and how aggressively you accelerate.
  • Smoothness: symmetry / fluidity of corner entry-exit, vs. abrupt stab-and-release.
  • Late Braking: how late you dare brake — closer to apex = more aggressive.
  • Apex Discipline: how consistently each lap hits the same apex (line discipline).
  • Exit Throttle: how quickly you can get back on throttle after apex (exit efficiency).
  • Consistency: whether lap times are stable, or fast-slow vary wildly.

Single-session sample is small and scores have noise — focus on the radar's overall shape and labels, not specific numeric scores.
L3Raw data · trustUnderlying data, methodology disclosure, full coach debrief.
Key Observations
  • Observations are generated in Chinese by the analyzer; localized English version coming soon.
Data quality · trustNOISY
GPS jump rateCheck
286 / 22775 frames despiked · max jump 1020×
1.3%
Sample rateAmple
25.0 Hz · enough for apex / brake-point fixing
25.0 Hz
G-force sourceMeasured
Yaw-calibrated IMU
3-axis
Track extentMeasured
132 × 311 m · medium circuit
911 s
Conclusion confidence
Start/finish line is auto-detected (not manually calibrated).
Corners T2 / T3 / T6 / T7 / T8 appear in only part of the laps (min 33% hit) — apex stats have fewer samples.
🎙
Lao ZhangAI veteran debrief

Opening
Your best lap was L6 at 69.16s, but the theoretical 3-sector best lap could be 68.6s, giving you a recoverable 0.56s. S1 was quite stable, but there's room for improvement in S2 and S3.

Style sketch
You're an aggressive late-braker with a steady rhythm. You tend to apply throttle early on exit, but your line consistency could use some work.

Top corners to improve
- T3: This is a left sweeper with a radius of 54.4m and a grip ceiling of 91.1 km/h, though your kart tops out at 86.2 km/h. Your best apex was 83.2 km/h in L4, while your worst was 66.0 km/h in L1. There's a 2.7 km/h gap to the achievable apex, worth about 0.122s per lap. The issue is that you're braking too early and not carrying enough speed through the corner. Next session, brake 3m later, aim for an entry speed of 85 km/h, and push the apex to 86 km/h.
- T5: A right sweeper with a 52.4m radius and a grip ceiling of 89.4 km/h, capped by your kart's 86.2 km/h. Your best apex in L5 was 83.6 km/h, and your worst in L1 was 70.0 km/h. There's a 2.6 km/h gap to the achievable apex, worth around 0.109s per lap. You're braking too early and not getting back on the throttle quickly enough. Next time, brake 5m later, target an entry speed of 85 km/h, and get back on the throttle 10m earlier.
- T19: A left turn with a 25.1m radius and a grip ceiling of 61.8 km/h. However, it's linked to T18, and your achievable apex is 50.7 km/h. Your best apex in L6 was 49.8 km/h, and your worst in L2 was 45.5 km/h. The real improvement lies in T18. Exit T18 earlier on the gas to increase T19's entry speed.

Consistency observation
You showed good consistency in some corners, but T3 and T5 had significant time gaps between your best and worst laps. In T3, your best lap was 2.12s, and your worst was 2.6s, a 0.48s gap. In T5, the gap was 0.28s. The key is to replicate your best lap's braking, entry, and exit on every lap.

Trail braking observation
Your trail brake ratio session-wide is 81%, but T14 is only 37.5% — you finish braking before turning in. Try releasing the brake one beat later than the wheel, let it carry into the apex. You could save around 0.1 - 0.3s per lap there.

Rhythm observation
Your rhythm was decisive this session; no real hesitation.

Safety note
On L7, I saw your speed drop from 84.4 km/h to 0 km/h mid-lap — that looks like a mid-lap stop. Hope you're okay. What happened — contact, off-track, or yielding for someone? That matters more than lap time.

Closing
You've shown great potential this session. Your best lap in T3 was very close to the achievable apex. Next session, focus on T3. Brake later and carry more speed through the corner to get closer to the ceiling.

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