Fleets became measurable.

Airlines know everything. Every flight, every pilot, every landing, every aircraft — automatically measured, scored, queryable. Fleet managers in General Aviation still have to run on Hobbs spreadsheets and incident reports from memory. Sentinel G1 brings commercial-grade fleet operations to every club and ATO for €399 per aircraft. Real-time visibility on every aircraft. Sensor-verified incidents, no more disputes. Audit-proof flight archive from day one. We're building the operations layer of General Aviation.

Request a free live demo →

EVENTS · SUNDAY 18:42LIVE

⚠ ALERT · 14:32 · 4h AGO

Hard landing · OO-VMX

Vertical peak · threshold 2.6G

4.2G

OO-VMX

Hard landing

4.2G52/100

OO-VNB

—

1.3G94/100

OO-WSP

Hard brakes

1.1G73/100

OO-TMA

—

1.2G96/100

FLIGHT REVIEW · OO-VMX · ZO 14:32LIVE

84 / 100

Flight grade B — Good flight

6 manoeuvres automatically detected, scored against FAA ACS tolerances. Click through for ACS breakdown per manoeuvre.

Takeoff roll

Vr consistent with POH, no yaw deviation. Smooth rotation.

Cruise stability

±50ft altitude hold over 22 min, slight heading drift at turn-out.

Final approach & landing

4.2G touchdown · sink rate 680 fpm above threshold · 2 bounces.

Sentinel G1 — autonomous EDR, no STC required

Sentinel G1 is an autonomous flight data sensor with a stack of high-grade sensors including a 6-axis accelerometer & gyro at 10 Hz, MEMS RPM extraction and a barometer. Advanced algorithms and edge machine learning filter out critical events and turn them into a fleet dashboard that updates automatically via the built-in e-sim after every flight.

Easy to install yourself with a removable 3M pad on the cabin floor panel. Magnetically detachable from the 3M pad for inspection.

A data-driven platform that makes fleet management worry-free.

Event dashboard

Flight feedback for pilots

Real-time alerts

Audit-proof archive

Hobbs to billing, no disputes

A feedback layer that sharpens every flight.

Flight Score A to F per flight

ACS-tolerance scoring per manoeuvre

Concrete tips you can apply tomorrow

Personal ACS-grade flight archive

Visible progress across all flights

Typical minimum savings our EDR delivers

Benefit per aircraft

Per year

15% less downtime

Risks are exposed early via real-time flight data. Boeing AHM and IATA FOQA programs show a 10-15% reduction in unexpected AOG events. At €3,000/aircraft/year downtime cost = €450 saved.

+€450

Fewer unnecessary inspections

Without objective data, every "I think that felt hard" triggers a mandatory inspection. With G-trace data, only real exceedances trigger one. Estimated saving €200/aircraft/year in inspection cost and downtime.

+€200

25% less pilot-related damage

A feedback loop with pilots based on flight data reduces pilot errors by 20-30% (LOSA studies, FOQA debrief programs). At €1,200/aircraft/year pilot-related damage = €300 saved.

+€300

Hobbs auto-billing — recovered revenue

Manual Hobbs logging typically loses 5-10% of flight hours through forgotten entries or rounded numbers. Automatic engine time from RPM = full billing. At ~€15,000/year rental revenue = €600/aircraft/year recovered.

+€600

Claim disputes avoided

An audit-proof flight archive prevents disputes with insurers and pilots. Estimated cost €750/aircraft/year in admin time and lost claim value.

+€750

20% fewer claims via EDR behavioral effect

When pilots know flight data is being recorded, their behavior changes. FOQA data from commercial aviation supports ~20% claim reduction. At €2,500/aircraft/year claim cost = €500 saved.

+€500

Sentinel G1 (HW + subscription per year)

€399 hardware depreciated over 10 years = €40/year, + €19/month subscription = €228/year. Total ~€268 per aircraft per year.

−€268

Total estimated savings per aircraft per year

€2,532

Savings for your fleet of 5 aircraft

1 AIRCRAFT100 AIRCRAFT

€12,660

What a Flight Score earns you per year.

Luckily you can't take home your instructor. But you can take home your data. Take your time reviewing your flights and understand how to finetune every aspect of it. Be ready for your next instructor flight and get the most out of it. Every time.

Benefit per pilot

Per year

Faster to PPL or next rating

FOQA debrief studies and LOSA research show 15% faster progression with structured post-flight feedback using objective data. For an average student: ~5 dual hours saved at €170/h = €850.

+€850

Higher first-time check-ride pass rate

Concrete ACS-scored debriefs close the gap between practice flights and exam tolerances. Avoided re-test (DPE fee + extra dual) ≈ €450 expected value per candidate.

+€450

Less remedial dual time

With objective metrics you see before your instructor where you are falling behind — no wasted lesson hours on the same mistakes. Estimated: 2 fewer dual hours per year = €340.

+€340

Faster debriefs for instructors

From 20 min from memory to 5-10 min with data on the table. For an active FI: ~13 h/month saved = ~€8,000/year in instructor time (FI hourly rate).

+€8,000 /FI

Personal ACS-grade flight archive

Every flight automatically logged with ACS tolerances, manoeuvre detection and score progression over time. Career-grade portfolio for commercial training, airline interviews or recurrency checks.

career value

Sentinel G1 (via club subscription)

Hardware and data subscription are covered by the club / ATO. Pilots and instructors use Sentinel at no personal cost.

€0

Total recovered per pilot per year

€1,640 + career-grade archive

Request Sentinel G1.

One autonomous flight data sensor per aircraft. Hardware €399, subscription €19/month including e-sim data bundle. Month-to-month, cancel anytime. Shipping from autumn 2026.

SENTINEL · SAMPLE DATA · DEMO CLUB URSEL

Flying Club Ursel · Logged in as Fleet Manager (demo)

TODAY

Sunday 18 May 2026 · 18:42

Flights · last 7 days

Registration	Date	Time	Hobbs	Alert	Landing G	Flight score
OO-VMX	Sunday	14:32	1.2h	Hard landing	4.2G	52 F
OO-VNB	Sunday	13:10	1.8h	—	1.3G	94 A
OO-WSP	Saturday	16:40	1.4h	Hard braking	1.1G	73 C
OO-TMA	Saturday	10:20	2.1h	—	1.2G	96 A
OO-BVC	Friday	09:10	0.7h	—	1.8G	87 B

Fleet · 5 aircraft

OO-VMX

Cessna 172

1 ALERT

Flights

Hobbs

256.1 h

OO-VNB

Robin DR400

Flights

147

Hobbs

412.8 h

OO-TMA

Piper PA-28

Flights

412

Hobbs

1820.4 h

OO-BVC

Diamond DA40

WATCH

Flights

134

Hobbs

389.2 h

OO-WSP

Tecnam P2008

Flights

193

Hobbs

512.3 h

Registration

OO-VMX

Time

Sun 14:32

Hobbs

1.2h

G-Trace · 10 Hz

20 sec around touchdown · threshold 2.6G

Max G

4.2

Sink rate

-680 fpm

Bounces

Sideload

0.3G

RPM · 1 Hz

Full flight · engine start to shutdown

Max RPM

2470

Avg cruise

2210

Idle cooldown

1m 48s

Events · chronological

+ 00:00

Engine start Cold start, normal RPM rise

700 RPM

+ 02:14

Takeoff roll Full power applied, run smooth

2470 RPM

+ 05:32

Cruise reached 2200 ft, stable mixture

2210 RPM

+ 1:02:18

Descent begin Throttle reduced, smooth

1850 RPM

+ 1:09:47

Hard touchdown First contact, peak vertical G

4.2G

+ 1:09:48

Bounce 1 Aircraft lifted off runway

2.1G

+ 1:09:49

Bounce 2 Second contact, lower energy

1.8G

+ 1:11:30

Engine shutdown Cooldown 1m 48s

0 RPM

Jan Declercq · Logged in as Pilot (demo)

OO-VMX · Cessna 172Sunday 18 May · 14:32 — 15:47

84 / 100

Flight grade B — Good flight with attention point at landing

Aggregate of 6 auto-detected manoeuvres (60% weight) and 4 flight-quality metrics (40%). Each manoeuvre scored against FAA Airman Certification Standards tolerances (FAA-S-ACS-6B Private Pilot) where applicable.

Smoothness

78/100

G-trace stdev · jerk events

Altitude precision

88/100

±50 ft hold during cruise

Pattern accuracy

82/100

Turn rate · heading hold

Coordination

90/100

Slip ball · side-load minimal

Per-manoeuvre breakdown · 6 detected

A · excellent

Engine start & runup + 00:00

Cold start performed per checklist. Magneto check showed no drop above 175 RPM. Oil pressure in green arc within 30s.

ACS-style breakdown

Cold start timeTarget ≤8 s · POH

6.4 s

Magneto drop (L/R)Target ≤175 RPM · POH

120 / 135 RPM

Carb heat RPM dropTarget 50-100 RPM · POH

85 RPM

Oil pressure to greenTarget ≤30 s · normal start

22 s

Idle RPM stabilityTarget 700 ±50 RPM

695 RPM (σ 18)

Engine vibration signatureTarget nominal · accelero stddev

0.04 G σ

Throttle smoothness runupTarget ≤10%/s rate

6%/s

A · excellent

Takeoff roll + 02:14

Full power applied smooth, runway alignment within 1° during roll. Rotation at 55 KIAS — consistent with POH Vr of 55-60 KIAS.

ACS-style breakdown

Time to rotationTarget ≤14 s · C172 normal

12.8 s

Acceleration uniformityTarget σ ≤0.05 G longitudinal

0.04 G σ

Rotation speed (Vr)55-60 KIAS · POH

55 KIAS

Rotation pitch7-10° nose-up

8.2°

Yaw control during rollTarget Z-gyro σ ≤2°/s

1.4°/s σ

Runway alignment±2° required · gyro heading

±0.8°

Liftoff smoothnessTarget no jerk >0.3 G

0.18 G peak

B · good

Climb to cruise + 02:30

Initial climb at Vy (74 KIAS) well maintained. Pitch slightly above nominal in first 500ft, then stable. Heading hold ±3° during climb-out.

Reduce pitch by 1-2° in initial climb to better capture Vy — improves climb gradient at full load.

ACS-style breakdown

Initial climb rateTarget ≥600 fpm SL · baro derivate

720 fpm

Climb speed (Vy)74 KIAS ±5 · ACS

71 KIAS

Climb pitch5-7° nose-up · gyro Y

7.8°

Bank in climb turn-out15-20° standard rate

18°

Coordination in turnBall ±0.1 · lateral G

0.06 G

Heading hold straight climb±5° · gyro Z

±3°

Pitch oscillation (PIO)Target 0 events · gyro Y

B · good

Cruise · 2200 ft + 05:32

Altitude hold ±50 ft over 22 min cruise. Mixture leaned at 4000 ft DA. Slight heading drift at turn-out (±8°).

Re-trim after every heading change — reduces heading drift to <5°.

ACS-style breakdown

Altitude hold±100 ft · baro vs target

±50 ft

Heading hold±10° · gyro Z integraal

±8°

Bank stability (wings level)Target σ ≤2° · gyro X

1.5° σ

Slip ball coordinationBall ±0.1 · lateral G

0.08 G

Pitch attitude cruise0-2° nose-up · gyro Y

1.4°

Cruise RPM2200-2400 economy

2210 RPM (σ 15)

Trim qualityHigh-freq input rate ≤2/min

2.4/min

C · adequate

Descent & downwind + 1:02:18

Average descent rate 520 fpm — slightly high for pattern entry. Downwind alignment ±15° from runway heading. Speed on base bracket good.

Reduce descent rate to 400-500 fpm in pattern entry for better energy management on base/final.

ACS-style breakdown

Descent rate≤500 fpm pattern · baro

520 fpm

Power reduction smoothnessTarget ≤200 RPM/s rate

280 RPM/s

Pattern altitudeTPA ±100 ft · baro

±120 ft

Downwind alignment±10° heading · gyro Z

±15°

Pattern turn bank25-30° · gyro X

22°

Flap deployment timingPer POH speed · deceleration signature

85 KIAS (in spec)

Base/final speed70 KIAS ±5

72 KIAS

D · below standard

Final approach & landing + 1:09:47

Approach speed 5 KIAS too high on short final. Sink rate 680 fpm at touchdown — above 500 fpm recommendation. Peak G 4.2G with 2 bounces. Sideload from slight crab not removed.

Work on flare timing: add a short pause between round-out and touchdown. Train hard-landing recovery with an instructor on simulator/dual.

ACS-style breakdown

Approach speed65 KIAS ±5 · ACS

70 KIAS

Glideslope stabilityVS σ ≤100 fpm · baro derivate

180 fpm σ

Flare initiation height1-3 ft AGL · baro

4 ft

Sink rate at touchdown≤500 fpm · POH

680 fpm

Touchdown G≤2.6 G · threshold · accelero Z

4.2 G

Crab angle at touchdown≤2° · heading vs track

3.1°

Sideload≤0.2 G lateraal · accelero Y

0.3 G

Bounces0 ideaal · G-peak detect

Roll-out alignment±0.5° centerline · gyro Z

±1.4°

Braking smoothnessDecel σ ≤0.1 G · accelero X

0.14 G σ