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Big Water Rocket - flight 5

Mercury V1 Rev 3 · firmware 2.41
Apogée
49.27m
3.48 s after launch
Max. montée
27.55m/s
peak ascent
Max. pendant combustion
8.26G
during the burn
Atterrissage
16.73s
touchdown 3.68 m/s
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Résumé du vol

The flight, moment by moment

Liftoff
0 s
Angle de rampe2.7°
Orientation6.39°
Launch detected
0.264 s
Altitude2.02 m
Vitesse10.73 m/s
Fin combustion (premier)
1.48 s
Altitude29.05 m
Vitesse20.120 m/s
Apogée
3.48 s
Altitude49.27 Mètres
Incl. max. jusqu’à fin comb.14.61°
Éjection possible
5.089 s
Altitude40.76 m
Vitesse-11.00 m/s
Atterrissage
16.73 s
Altitude-1.07 m
Max. descente-11.28 m/s

Stabilité86.2%Excellent

Inclinaison à la fin de combustion (20%)93
20% · Rail angle 2.7°
Tangage/lacet (30%)96.4
25% · Coning 19.1/19.8°/s
Coning · boost (25%)96.2
25% · Spin 139.6°/s
Rectitude de poussée (15%)64.9
30% · Thrust 92.4%

Rocket information

Calculated from the flight data alone
Boost acceleration13.6 m/s²
average over the burn · 1.4 g
Coast deceleration10.1 m/s²
average · gravity plus drag
Ballistic coefficient406 kg/m²
fitted to the 2.00 s coast
Apogee lost to tilt0.92 m
flown vertical ≈ 50.1 m · from the tilt at burnout
Chute opening peak15.31 G
largest deceleration after ejection
Average descent rate3.59 m/s
ejection to landing · 11.64 s
Batterie & température 58% → 57% · Température début 11.89 → 11.93 °C · Lancement après démarrage 7m 40s

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
Apogée49.27 Mètres
Temps jusqu’apogée3.48 s
Altitude fin combustion29.05 m
Altitude vitesse max.12.03 m
Altitude éjection40.76 m
Altitude atterrissage-1.07 m
Altitude enregistrement-5.57 m
Vitesse
Max. montée27.55 m/s
Max. descente-11.28 m/s
À fin combustion20.120 m/s
Vitesse descente-3.837 m/s
Vitesse éjection-11.00 m/s
Vitesse atterrissage-3.677 m/s
Accélération
Max. pendant combustion8.26 G
Max. montée8.26 G
Max. descente15.31 G
Moy. montée0.15 G
Moy. combustion1.44 G
Temps
Fin combustion (premier)1.48 s
Apogée3.48 s
Éjection possible5.089 s
Atterrissage16.73 s
Sortie #1 ON0 s
Sortie #1 OFF0 s
Angles
Angle de rampe ?2.7° ± 1.51° incertain, support déplacé
Basculement rampe ?non mesuré
Incl. max. jusqu’à fin comb. ?14.61°
Orientation ?6.39°
Décalage de montage ?non mesuré
Roulis au lancement0.34°
Tangage au lancement-6.01°
Rotation max. (comb.)2249.39 dps
Rotation moy. (comb.)117.15 dps
Recovery
Single deploy
No dual deploy detected on this flight.
Général
Date envoi28-Oct at 20:48
Échantillons5835
Durée totale enregistrement30.200 s
Moy. échantillons/s193.2
Nombre de verrouillages0
Lancement après démarrage7m 40s
Axe de référenceX
Batterie & température
Batterie début58%
Batterie fin57%
Température début11.89°C
Température fin11.93°C
Temp. MT1 lancement0°C
Règles de sortie
Aucune règle configurée
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.
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Notes utilisateur
Aucune note
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Vidéo Youtube
Aucune vidéo
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Images du vol 0
Aucune image
Flown as
Motor configuration
None
no motor recorded
Loaded weight
None
not entered
Moteurs du vol
Aucun moteur ajouté à ce vol
Ajoutez cet appareil à votre compte pour modifier
Fusée associée
Active
1 photo
Big Water Rocket (6L)
5 flights linked
Type
Scratch built
Diameter
88mm
Length
1920mm
Empty weight
515g
Stages
1
Fins
3
Body
PET
💬 No comments yet
Rule events
No output rules fired during this flight.
Correspondance moteur (BETA)
Encore en phase de test ! Nous cherchons à deviner quel moteur a été utilisé.
Marque
Moteur
Score
Forme
Comb.
Cesaroni
25-E75-VM-17A
32
70.2%
90.7%
Contrail
G300
15
65%
70.2%
AeroTech
H669N
1
70.3%
83.6%
Estes
1/2A6
0
36.3%
69.1%
Estes
1/4A3T
0
31.4%
78.3%
Cesaroni
68-F240-VM-15A
0
62.1%
86%

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.

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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.

No launch site has been set for this flight.

Animation des données

FLIGHT 3177

49.27 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.
Mercury V1
Rocketry Ltd

Mercury V1

Altimètre haute performance compatible WiFi. Ce vol a été effectué sur un Mercury V1.
Version matériel Rev 3Version logiciel 2.41Dernière connexion 28-Oct at 20:56

Caractéristiques

Électronique

Microcontrôleur
ESP32-C632-bit ESP32-C6 160MHz
Accéléromètre
ST LSM6DSO3232G 3-axis (I2C)
Baromètre
Bosch BMP581300 to 1250 hPa within specification
Gyroscope
ST LSM6DSO322000 dgps 3-axis
Sorties fort courant
1x 8A high current high side switch
Prise en charge des servos
Yes: 2 Directly or 16 via the I2C expansion port

Enregistrement

Fréquence d'échantillonnage maximale
433 Hz
Échantillons max. par enregistrement
30,000
Enregistrement le plus long
50 minAt 10Hz although default settings are 433Hz with 1:8 hybrid mode

Taille, poids et batterie

Taille
30 x 16.9 x 10.8mm
Poids
4.6 g4.6 g avec la plus petite batterie
Tension de la batterie
3 à 4.2 V
Autonomie
6avec la plus petite batterie

Documents

Flights from this altimeter

5 of 520 of 236

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.
1025 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.
2 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.
1:5 (hybrid, reduces after apogee)
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.
18000
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: 450 samples stable (~9s)
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.
Kalman 2 (default)
Changement verrouillage
i
This is how we detect a lockout. If the pressure changes by this much in a single sample downwards (pressure increase, lower altitude) then it's likely to be a false reading. Multiply the setting by 32 to get the speed in meters per second that it will trigger at.
0.5 meters
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 (38 samples / 172.00ms)
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.
Upwards (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.
1.4G
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
Capteur temp.
i
If an external MT1 temperature sensor is connected, this controls whether it is used for logging only or also for altitude calculations.
DISABLED
Paramètres de sortie
Arm switch
i
When enabled, GP6 is a hardware arm switch — outputs and rules are held off until the switch is closed to ground.
DISABLED
Startup lockout
i
Outputs and rules are blocked for this many seconds after power-on while sensors settle. 0 = off.
None
Launch confirm delay
i
After launch is detected, outputs and rules won't fire until this many seconds have passed.
2 s
Altitude floor
i
Outputs and rules are blocked until the rocket is at least this height above the launch pad.
50 m
Custom dataset 1
i
User-defined expression evaluated per sample, available for charting.
—
Custom dataset 2
—
Étalonnage capteurs
Décalages de calibration utilisés pour ce vol.
Gyroscope
X1.110°
Y-0.120°
Z-0.210°
Accéléromètre
X-10.710 mG
Y6.880 mG
Z17.050 mG
Paramètres appareil
TAG appareil
i
A custom name or tag assigned to this device for easy identification.
Merc2894
Langue
i
The language setting configured on the device.
🇬🇧 English
Mode arrêt
i
Controls what happens after recording. Standard shuts down normally, Delayed keeps WiFi on for 30 seconds after landing, Stay on keeps the device powered on.
Standard
Luminosité LED
i
The brightness level of the LED indicators on the Mercury. Lower values save battery.
20%
Puissance WiFi TX
i
WiFi transmit power level. Higher gives better range but uses more battery.
2 dBm (low)
Mode veille
i
Controls whether the device enters low-power sleep when idle.
Normal (sleep when idle)
Surveillance batterie
i
Monitors battery voltage during the flight.
DISABLED
Groupe cloud
i
The cloud group / category this flight is assigned to.
General use
Ports GP6 / GP7
Configuration des ports GP6 et GP7 pour canaux pyro, servos ou autres appareils.
Mode canal 6
ON = HIGH
Ch6 min pulse (µs)
1000
Ch6 max pulse (µs)
2000
Ch6 frequency
50 Hz
Ch6 angle ON
170°
Ch6 angle OFF
10°
Ch6 on time
2s
Mode canal 7
ON = HIGH
Ch7 min pulse (µs)
1000
Ch7 max pulse (µs)
2000
Ch7 frequency
50 Hz
Ch7 angle ON
170°
Ch7 angle OFF
10°
Ch7 on time
2s
Carte servo I2C PCA9685
Configuration de la carte servo externe I2C PCA9685 avec jusqu’à 6 canaux servo supplémentaires.
Aucune carte servo I2C n’était connectée pour ce vol.
Prédiction et aérofreins
Le Mercury peut prédire l’apogée pendant la phase de vol libre. Ces paramètres contrôlent le calcul et le système d’aérofrein.
Masse sèche
i
The total mass of the rocket after motor burnout (dry mass). This is used for the ballistic prediction of apogee altitude. Enter the mass without the motor propellant, or the mass at burnout.
0.15 kg
Coefficient Cx
i
The aerodynamic drag coefficient (Cd) of the rocket. This is used with the rocket area to calculate aerodynamic drag during coast. A typical model rocket has a Cd of 0.4 to 0.8. You can find this value from OpenRocket or RockSim simulations.
0.75
Surface référence
i
The cross-sectional reference area of the rocket in square meters. This is typically the area of a circle with the body tube diameter. For example a 38mm tube has an area of approximately 0.00113 m².
0.001 m²
Gas constant
i
The specific gas constant for dry air, used in the atmospheric model for altitude and density calculations. The standard value is 287.05 J/(kg·K). You shouldn't need to change this unless you know what you're doing.
287.05 J/(kg·K)
Les paramètres suivants configurent le système d’aérofrein.
Aérofrein activé
i
Enables or disables the active air braking system. When enabled, the Mercury will deploy air brakes via the configured servo channel to try and reach the target altitude. Firmware 2.1+ required.
OFF (default)
Servo channel
i
Which servo output channel the air brake mechanism is connected to. GP6 and GP7 are the two onboard servo headers, I2C channels are for an external servo expander board.
GP6
Deploy speed
i
The speed at which the air brakes deploy. The Mercury gradually increases the servo angle until the predicted apogee matches the target rather than going full on/off. This setting controls how quickly it ramps up to full braking.
Medium (default)
Altitude cible
i
The target apogee altitude in meters. The air brake system will try to slow the rocket so it reaches this altitude.
300 m
Over shoot %
i
The percentage over the target altitude to aim for until within 15% of the target. This helps prevent undershooting if the prediction is slightly off early in the coast. For example, with a 1000m target and 5% early adjustment, the Mercury will aim for 1050m until it passes 850m.
5%
Activation altitude
i
The air brake system activates after burnout, but won't engage until the rocket has reached this percentage of the target altitude. This prevents the brakes from deploying too early when predictions may be less accurate.
20% (default)

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
3177.csv
The log as columns of text. Opens in a spreadsheet, and in every simulator that reads flight data.
473 KB
JSON
3177.txt
The altimeter's own notes on the flight: what it recorded, what it decided, and why. Later firmware writes this as JSON.
3 KB
JSON
3177_settings.txt
The settings the altimeter was running when it flew, exactly as it saved them alongside the log.
2 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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