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Vitesse
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Accélération
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Leo's Scratch build - 3x B4-4

Nano V1 Rev 4 · firmware 1.65Secure logSecure logThe altimeter signed this log and it passed verification on upload, so the data is unchanged since the device wrote it.Signatures use Ed25519, which no current technology can forge.
Apogée
100.45m
5.05 s after launch
Max. montée
42.22m/s
peak ascent
Max. pendant combustion
9.55G
during the burn
Atterrissage
22.23s
touchdown 5.22 m/s
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Résumé du vol

The flight, moment by moment

Liftoff
0 s
Angle de rampe3.6°
Basculement rampe13.46°
Fin combustion (premier)
1.12 s
Altitude28.06 m
Vitesse42.010 m/s
Launch detected
1.175 s
Altitude30.05 m
Vitesse41.4 m/s
Apogée
5.05 s
Altitude100.45 Mètres
Incl. max. jusqu’à fin comb.16.94°
Éjection possible
5.152 s
Altitude100.4 m
Vitesse-0.92 m/s
Atterrissage
22.23 s
Altitude-0.66 m
Max. descente-31 m/s

Stabilité86.5%Excellent

Inclinaison à la fin de combustion (20%)90.9
20% · Rail angle 3.6°
Tangage/lacet (30%)96.4
25% · Coning 19/25.8°/s
Coning · boost (25%)93.7
25% · Spin 196.5°/s
Rectitude de poussée (15%)69.3
30% · Thrust 93.4%

Rocket information

Calculated from the flight data alone
Boost acceleration37.5 m/s²
average over the burn · 3.8 g
Coast deceleration10.7 m/s²
average · gravity plus drag
Ballistic coefficient151 kg/m²
fitted to the 3.93 s coast
Apogee lost to tilt1.17 m
flown vertical ≈ 101.6 m · from the tilt at burnout
Chute opening peak51.79 G
largest deceleration after ejection
Average descent rate5.91 m/s
ejection to landing · 17.08 s
Batterie & température 94% → 88% · Température début 30.17 → 27.42 °C · Lancement après démarrage 7m 34s

About the stability score

Worked out from the flight log between liftoff and 80% of apogee. It is independent of the angle the altimeter was mounted at, so it measures the flight rather than the fitting.

Inclinaison à la fin de combustion (20%)20%How close to vertical it left the rod.
Tangage/lacet (30%)25%How much the nose swung off the rocket's own axis across the whole ascent.
Coning · boost (25%)25%The same swing during the burn, when it matters most.
Rectitude de poussée (15%)30%How cleanly the motor pushed along the body.

Spin about the rocket's own axis is not counted against it — a fast, straight spin is stable. The figures beside the score are the raw measurements behind these four.

Altitude
Apogée100.45 Mètres
Temps jusqu’apogée5.05 s
Altitude fin combustion28.06 m
Altitude vitesse max.26.3 m
Altitude éjection100.4 m
Altitude atterrissage-0.66 m
Altitude enregistrement35.07 m
Vitesse
Max. montée42.22 m/s
Max. descente-31 m/s
À fin combustion42.010 m/s
Vitesse descente-5.974 m/s
Vitesse éjection-0.92 m/s
Vitesse atterrissage-5.223 m/s
Accélération
Max. pendant combustion9.55 G
Max. montée9.55 G
Max. descente51.79 G
Moy. montée0.24 G
Moy. combustion3.9 G
Temps
Fin combustion (premier)1.12 s
Apogée5.05 s
Éjection possible5.152 s
Atterrissage22.23 s
Angles
Angle de rampe ?3.6° ± 0.32°
Basculement rampe ?13.5°
Incl. max. jusqu’à fin comb. ?16.94°
Orientation ?62.13°
Décalage de montage ?81.1° réglage d’orientation probablement faux
Roulis au lancement57.84°
Tangage au lancement-28.58°
Rotation max. (comb.)319.02 dps
Rotation moy. (comb.)236.31 dps
Staging
Stages detected1
Burnout (refined)1.131 s
Stage S1 burnout
flip1.125 s
drag1.127 s
sig1.277 s
Recovery
Single deploy
No dual deploy detected on this flight.
Général
Date envoi13/09/26-19:07:56
Échantillons9390
Durée totale enregistrement39.241 s
Moy. échantillons/s239.2
Nombre de verrouillages0
Lancement après démarrage7m 34s
Axe de référenceY
Batterie & température
Batterie début94%
Batterie fin88%
Température début30.17°C
Température fin27.42°C
Something look wrong with this flight's data?
Tell us what looks wrong and we'll look into it. It helps us find and fix problems in the firmware and on the site, and we can correct this flight.
You're not logged in, so we can't let you know when we've looked into it.
Notes utilisateur

A nice launch for Leo's scatch built 3x 18mm cluster. This flight flew perfectly on 3x Klima B4-4 motors.

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Vidéo Youtube
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Images du vol 0
Aucune image
Flown as
Rocket
None
not linked
Motor configuration
Custom
3× Klima B4-4, set on this flight
Loaded weight
274.6 g
estimated, none entered

Measured burn

from this flight’s thrust
Total impulse, NFPA 1125needs the weight
rated 15.00 Ns
Burn time, NFPA 11251.12 s
0.00 to 1.12 s
Peak thrustneeds the weight
at 0.24 s
With no loaded weight the impulse would only give the motor’s rating back, so it waits for the weight. The burn time is measured either way.
Moteurs du vol
1st stage · cluster of 3 · 4s delay
3×B4-4KlimaDetails
Durée combustion
1.2 s
Diameter
18.00 mm
Poussée moyenne
4 N
Poussée max.
8 N
Poids total
16.30 g
Poids propergol
5.40 g
Type propergol
composite
Impulsion15Ns
Poussée max.24N
Durée combustion1.2s
Classe impulsionD
1st stage thrustloading curve…
Motor data by ThrustCurve.org
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Fusée associée
Aucune fusée associée à ce vol

Linked flights

Connect flights that belong together: a second altimeter flown in the same rocket, or the same rocket flown again. Linked flights appear on each other’s pages.

Apogee spread100.45 – 295.5 m
#2912 · Nano V1Same rocket · same day295.5 mView flight →

Site de lancement, date & heure

Cliquez sur la carte pour marquer votre site de lancement. Basculez entre vue carte et satellite.

Imagery © Esri, Maxar, Earthstar Geographics

Cliquez sur la carte · Glissez pour ajuster

Canopy height from the Meta and WRI High Resolution Canopy Height Maps v2 (Meta and World Resources Institute, 2026; source imagery © 2016 Vantor), used under CC BY 4.0. Ground elevation built from Terrain Tiles (Mapzen and AWS Open Data), derived from 3DEP and GMTED courtesy of the U.S. Geological Survey, SRTM courtesy of NASA, and ETOPO1 courtesy of NOAA. Map and imagery credited on the view above.

Site nameTwycrossLat52.667949Lng-1.522803Ground level108.0 m · 354 ftDate de lancement2026-09-13Heure de lancement14:00
Animation des données

FLIGHT 2911

100.45 Meters

ALTITUDE
0.00m
VELOCITY
0.00m/s
ACCEL
0.00G
TILT
0.00°
PITCH
0.00°
ROLL
0.00°
YAW
0.00°
TIME
0.00s
AWAITING LAUNCH
ALT
altimetercloud.com
LAUNCH T+0.00s LANDING

BURNOUT

Motor burn complete

Note : L’animation de vol nécessite que votre altimètre soit monté dans une orientation fixe. Calibrez vos capteurs pour de meilleurs résultats.
Nano V1
Rocketry Ltd

Nano V1

Altimètre compact pour petites fusées. Ce vol a été effectué sur un Nano V1.
Version matériel Rev 4Version logiciel 1.65Dernière connexion 13/09/26-19:07:56

Caractéristiques

Électronique

Microcontrôleur
ESP32-S232-bit ESP32-S2 240MHz
Accéléromètre
ST LSM6DSO3232G 3-axis (SPI)
Baromètre
Bosch BMP581300 to 1250 hPa within specification
Gyroscope
ST LSM6DSO322000 dgps 3-axis

Enregistrement

Fréquence d'échantillonnage maximale
833 Hz
Échantillons max. par enregistrement
38,000
Enregistrement le plus long
1 h 3 minAt 10Hz although default settings are 433Hz with 1:8 hybrid mode

Électronique

Microcontrôleur
ESP32-S232-bit ESP32-S2 240MHz
Accéléromètre
ST LSM6DSO3232G 3-axis (I2C)
Baromètre
Bosch BMP581300 to 1250 hPa within specification
Gyroscope
ST LSM6DSO322000 dgps 3-axis

Enregistrement

Fréquence d'échantillonnage maximale
833 Hz
Échantillons max. par enregistrement
38,000
Enregistrement le plus long
1 h 3 minAt 10Hz although default settings are 433Hz with 1:8 hybrid mode

Taille, poids et batterie

Taille
20 × 10 × 8.9 mm
Poids
1.65 g1.65 g avec la plus petite batterie
Tension de la batterie
3 à 4.2 V
Autonomie
5avec la plus petite batterie
Taille
20 × 10 × 8.9 mm
Poids
1.65 g1.65 g avec la plus petite batterie
Tension de la batterie
3 à 4.2 V
Autonomie
5avec la plus petite batterie

Documents

Flights from this altimeter

2 of 220 of 117

Settings, as they were for this flight

Paramètres généraux
Pression prévue
i
Set this to your local forecast pressure at sea level. This will offer you slightly improved accuracty for your flight, although it's not 100% essential every little helps!

Xcweather.co.uk is a decent place to grab pressures from for your location and time.
1013.2 mbar
Détection lancement
i
This is the altitude above the launch pad altitude where the altimeter will trigger itself into recording / flight mode.

The altimeter keeps a constant average of the pressure while waiting for launch, it uses a simple algorithm and the pre-flight buffers to do this. The most recent 120 samples (~4 seconds) are ignored so your pre-trigger altitude won't effect the ground baseline.

For almost all uses we suggest keeping this on the 25 Meter (~82 feet) default settings. If you want to test your altimeter by throwing it in the air, or are planning a very low flight you may want to lower the setting.
30 meters
Ratio échantillonnage
i
The altimeter runs at 50Hz however you can record every sample or every X samples in order to extend the log time. For example if you set the ratio to 1 it will save 1:1 samples, or if you set it to 3 it will save 1 in 3 samples.
1:1:1 (400Hz)
Max. échantillons
i
This is the maximum samples the altimeter will log per flight. When it reaches this amount it will stop and save the recording.
38000
Arrêt enregistrement
i
This setting is how the altimeter decides to stop recording. You can choose either 450 (~9s) or 900 (~18s) samples stable or it will record until the max samples limit unless you press the BUTTON in Manual stop mode.

The samples stable method waits for the devices altitude not to change for the set number of samples. This is defined by not changing by more than +/- 1.0 meters for 98% of the samples, it's a reliable method to stop the recording after landing within 8-10 seconds (300 sample) or 16-20 seconds (600 sample).
Auto: 8s stable altitude
Suréchantillonnage
i
Oversampling is a internal setting of the BMP 390 pressure sensor. It is how many samples are taken for each reading. By taking multiple samples for each pressure reading the altimeter reduces noise and increases the resolution of the output.

The sensor can run at 50 samples per second in 4X mode, so we suggest leaving it in this mode as it will offer the highest accuracy.
16x Oversampling
Filtre IIR
i
The IIR filter is another internal sensor for the BMP390 pressure sensor. It is a Infinite impulse response filter used to enhance pressure measurement accuracy by reducing noise. It's primarily for smoothing out rapid pressure changes.

We suggest not setting this too high as it will cause delay to changes in altitude if set very high.
COEFF 7
Filtre pression
i
This filter is a software Kalman filter that runs on the altimeters processor.

The Kalman filter uses a prediction step based on a system model and then a correction step using new measurements to refine its estimate, it creates accurate most certain results from data with noise in it.
TruePath
Sample speed
i
The sample rate of the altimeter's sensors. 50Hz takes 50 samples per second, 100Hz takes 100 samples per second for higher resolution data.
400 Hz
Hybrid mode
i
When enabled, the altimeter records at full speed during ascent then switches to half speed after apogee to extend recording time during descent.
Enabled
Synchro capteurs
i
The filters on the pressure sensor can cause it to lag very slightly behind the Accelerometer and Gyroscope data. The Sync sensors option detects how far out of sync these sensors are. It then corrects the Acceleration and Gyroscope readings to match the pressure sensor.
ACTIVÉ (46 samples / 114.88ms)
Orientation
i
This is the orientation you intend to install the Altimeter in your rocket. It's needed to ensure completly accurate angles and orientation charts and reports. Check out the Manual for more information on this.
Down (text up)
Filtre IMU
i
The IMU filter, or fusion filter takes the data from each axis of the Gyroscope and Accelerometer to calculate the Pitch, Roll, Yaw and tilt angle from vertical. These filters can build up some discrepency over time so it's important to calibrate your sensors to minimise this.
Madgwick 6-Axis
ALP lancement
i
This is prevention against accidental launch detection.

With this disabled the launch is based only on pressure and something that creates a low pressure can trigger the flight by accident. For example pulling your nose cone off can even trigger it.

With this enabled the rocket also needs to have seen 8 samples (0.25 seconds) of acceleration above this setting in the last 3 seconds as well as the pressure drop to trigger. There is a backup trigger of 1.05 seconds of altitude being above the launch detect setting too.

There are very few situations where this option would cause issues, so we suggest leaving it on.
2.0G
Verrouillage lancement
i
When enabled, the altimeter locks out recording for a set period after power on to prevent false triggering during setup.
DISABLED
Température statique
i
A fixed temperature value used for altitude calculation when the external temperature sensor is disabled or not connected.
15 °C
Étalonnage capteurs
Décalages de calibration utilisés pour ce vol.
Gyroscope⚠ Le gyroscope n’a pas été calibré
X0.000°
Y0.000°
Z0.000°
Accéléromètre⚠ L’accéléromètre n’a pas été calibré
X0.000 mG
Y0.000 mG
Z0.000 mG

Files

Where the altimeter signs its log, the file carries that signature and a tick beside it. A tick means the data is unchanged since the device wrote it, which is what a record claim needs.
CSV
2911.csv ✓ SIGNED
The log as columns of text. Opens in a spreadsheet, and in every simulator that reads flight data.
893 KB
LOG
2911.aclz ✓ SIGNED
The altimeter's own compressed log, exactly as the device wrote it. This is the file to keep for a record claim.
109 KB
WX
2911_weather.json.gz
The weather for 48 hours either side of the launch, within 15 km of the launch site: NOAA GFS every hour, at the surface and up to about 31 km, and the NOAA GEFS ensemble where this site holds it. JSON, gzip compressed. Weather data by Open-Meteo.com (CC BY 4.0) and NOAA. For 2026-09-13 14:00 local time at 52.6679, -1.5228.
1051 KB
Adjusted CSV2904 recalculated in your browser
The log recomputed for your own sea-level pressure and temperature. Columns: time, altitude as recorded and adjusted, raw altitude as recorded and adjusted, pressure.

This file is built here from the signed log, so it carries no signature of its own. Anyone verifying a claim should be sent to the flight page and build their own from the original.

Custom CSVbuilt in your browser
Pick any of the chart’s data sets, the worked-out ones included, and the part of the flight to cover. Values come in the units the chart is set to.
In the file
Time span

One row for every time any chosen data set has a sample. A data set with no sample at that time is left blank rather than filled in. Built from the chart’s data, so it carries no signature.

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