Big Water Rocket - flight 2
Mercury V1 Rev 3 · firmware 2.41
Apogeo
47m
3.88 s after launch
Máx. ascenso
26.53m/s
peak ascent
Máx. durante combustión
6.67G
during the burn
Aterrizaje
16.98s
touchdown 3.66 m/s
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Resumen del vuelo
The flight, moment by moment
Liftoff
0 s
Ángulo de rampa2.6°
Orientación9.60°
Launch detected
0.348 s
Altitud2 m
Velocidad9.02 m/s
Fin combustión (primero)
1.72 s
Altitud30.56 m
Velocidad17.480 m/s
Apogeo
3.88 s
Altitud47 Metros
Incl. máx. hasta fin comb.13.53°
Posible eyección
4.508 s
Altitud44.86 m
Velocidad-8.73 m/s
Aterrizaje
16.97 s
Altitud-0.86 m
Máx. descenso-11.89 m/s
Estabilidad83.9%Bueno
Inclinación al apagado (20%)93.5
20% · Rail angle 2.6°
Cabeceo/guiñada (30%)95
25% · Coning 22.8/22.7°/s
Coning · boost (25%)95
25% · Spin 114.7°/s
Rectitud de empuje (15%)59.2
30% · Thrust 91.1%
Rocket information
Calculated from the flight data alone
Boost acceleration10.2 m/s²
average over the burn · 1.0 g
Coast deceleration8.1 m/s²
average · gravity plus drag
Apogee lost to tilt0.52 m
flown vertical ≈ 47.5 m · from the tilt at burnout
Chute opening peak22.21 G
largest deceleration after ejection
Average descent rate3.66 m/s
ejection to landing · 12.46 s
Batería & temperatura 78% → 78% · Temperatura inicio 15.82 → 15.9 °C · Lanzamiento tras encendido 6m 55s
Altitud
Apogeo47 Metros
Tiempo al apogeo3.88 s
Altitud fin combustión30.56 m
Altitud vel. máx.14.95 m
Altitud eyección44.86 m
Altitud aterrizaje-0.86 m
Altitud grabación-3.67 m
Velocidad
Máx. ascenso26.53 m/s
Máx. descenso-11.89 m/s
En fin combustión17.480 m/s
Vel. descenso-3.672 m/s
Vel. eyección-8.73 m/s
Vel. aterrizaje-3.663 m/s
Aceleración
Máx. durante combustión6.67 G
Máx. ascenso6.67 G
Máx. descenso22.21 G
Prom. ascenso0.08 G
Prom. combustión1.19 G
Tiempos
Fin combustión (primero)1.72 s
Apogeo3.88 s
Posible eyección4.508 s
Aterrizaje16.97 s
Salida #1 ON0 s
Salida #1 OFF0 s
Ángulos
Ángulo de rampa ?2.6° ± 4.77° poco fiable, el soporte se movió
Desvío de rampa ?no medido
Incl. máx. hasta fin comb. ?13.53°
Orientación ?9.60°
Desalineación de montaje ?no medido
Alabeo al lanzamiento-3.19°
Cabeceo al lanzamiento-9.19°
Giro máx. (comb.)2181.65 dps
Giro prom. (comb.)90.56 dps
Recovery
Single deploy
No dual deploy detected on this flight.
General
Fecha subida28-Oct at 20:39
Muestras de datos5903
Tiempo total grabación29.100 s
Prom. muestras/s202.8
Número de bloqueos0
Lanzamiento tras encendido6m 55s
Eje de referenciaX
Batería & temperatura
Batería inicio78%
Batería fin78%
Temperatura inicio15.82°C
Temperatura fin15.9°C
Temp. MT1 lanzamiento0°C
Reglas de salida
Sin reglas configuradas
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Notas del usuario
Sin notas
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Vídeo Youtube
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Imágenes del vuelo 0
Sin imágenes
Flown as
Motores del vuelo
No se han añadido motores a este vuelo
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Cohete vinculado
Active
1 photo
Big Water Rocket (6L)
Type
Scratch built
Diameter
88mm
Length
1920mm
Empty weight
515g
Stages
1
Fins
3
Body
PET
Rule events
No output rules fired during this flight.
Coincidencia motor (BETA)
Aún en modo de prueba. Estamos averiguando qué motor se usó en el vuelo.
Marca
Motor
Puntos
Forma
Comb.
Estes
1/4A3T
14
-14.8%
76.6%
Contrail
G300
0
47.8%
68.2%
Linked flights
No linked flights yet.
Sitio de lanzamiento, fecha y hora
Imagery © Esri, Maxar, Earthstar Geographics
Clic en el mapa · Arrastre para ajustar
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.
No conditions have been recorded for this flight.
About sea-level pressure and QNH
Sea-level pressure is kept as given: the model’s own, or the figure entered from a forecast or report. QNH is that pressure the way an altimeter setting means it, through the standard atmosphere, and is what the adjusted apogee and the adjusted CSV use.
Model values, not observations. NOAA GFS: weather data by Open-Meteo.com (CC BY 4.0). Ensemble: NOAA GEFS.
Animación de datos
FLIGHT 3172
47 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
Nota: La animación de vuelo requiere que su altímetro esté montado en una orientación fija. Calibre sus sensores para mejores resultados.
Rocketry Ltd
Mercury V1
Altímetro de alto rendimiento con conectividad WiFi. Este vuelo se realizó con un Mercury V1.
Versión hardware Rev 3Versión software 2.41Última conexión 28-Oct at 20:56
Especificaciones
Electrónica
- Microcontrolador
- ESP32-C632-bit ESP32-C6 160MHz
- Acelerómetro
- ST LSM6DSO3232G 3-axis (I2C)
- Barómetro
- Bosch BMP581300 to 1250 hPa within specification
- Giroscopio
- ST LSM6DSO322000 dgps 3-axis
- Salidas de alta corriente
- 1x 8A high current high side switch
- Soporte de servos
- Yes: 2 Directly or 16 via the I2C expansion port
Registro de datos
- Frecuencia de muestreo máxima
- 433 Hz
- Máximo de muestras por registro
- 30,000
- Registro más largo
- 50 minAt 10Hz although default settings are 433Hz with 1:8 hybrid mode
Tamaño, peso y batería
- Tamaño
- 30 x 16.9 x 10.8mm
- Peso
- 4.6 g4.6 g con la batería más pequeña
- Voltaje de la batería
- 3 a 4.2 V
- Duración de la batería
- 6con la batería más pequeña
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Settings, as they were for this flight
Ajustes generales del vuelo
Presión prevista
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.
Xcweather.co.uk is a decent place to grab pressures from for your location and time.
1025 mbar
Detección lanzamiento
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.
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
Sample ratio
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 samples
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
Recording stop
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).
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)
Oversampling
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.
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
IIR filter
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.
We suggest not setting this too high as it will cause delay to changes in altitude if set very high.
COEFF 7
Pressure filter
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.
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)
Lockout change
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
Sync sensors
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.
ACTIVADO (60 samples / 260.00ms)
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)
IMU filter
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
Launch ALP
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.
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
Launch lock
i
When enabled, the altimeter locks out recording for a set period after power on to prevent false triggering during setup.
DISABLED
Static temperature
i
A fixed temperature value used for altitude calculation when the external temperature sensor is disabled or not connected.
15 °C
Temp sensor
i
If an external MT1 temperature sensor is connected, this controls whether it is used for logging only or also for altitude calculations.
DISABLED
Ajustes de salida
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
—
Calibración de sensores
Compensaciones de calibración usadas en este vuelo.
Giroscopio
X1.110°
Y-0.120°
Z-0.210°
Acelerómetro
X-10.710 mG
Y6.880 mG
Z17.050 mG
Ajustes del dispositivo
TAG dispositivo
i
A custom name or tag assigned to this device for easy identification.
Merc2894
Idioma
i
The language setting configured on the device.
🇬🇧 English
Modo apagado
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
Brillo LED
i
The brightness level of the LED indicators on the Mercury. Lower values save battery.
20%
Potencia WiFi TX
i
WiFi transmit power level. Higher gives better range but uses more battery.
2 dBm (low)
Modo reposo
i
Controls whether the device enters low-power sleep when idle.
Normal (sleep when idle)
Monitor batería
i
Monitors battery voltage during the flight.
DISABLED
Grupo cloud
i
The cloud group / category this flight is assigned to.
General use
Puertos GP6 / GP7
Configuración de los puertos GP6 y GP7 para canales pirotécnicos, servos u otros.
Modo 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
Modo 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
Placa servo I2C PCA9685
Configuration for the external I2C PCA9685 servo expansion board. This board provides up to 6 additional servo channels.
No I2C servo board was connected for this flight.
Predicción y aerofrenos
El Mercury puede predecir el apogeo durante la fase de planeo. Estos ajustes controlan el cálculo y el aerofreno.
Masa seca
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
Coef. arrastre
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
Área referencia
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)
Los siguientes ajustes configuran el sistema de aerofreno.
Aerofreno activado
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)
Altitud objetivo
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
3172.csv
The log as columns of text. Opens in a spreadsheet, and in every simulator that reads flight data.
478 KB
JSON
3172.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
3172_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.
Share this flight
Anyone with the link can view this flight; nothing else on your account is shared.
Chart snapshot
A PNG of the chart exactly as you have it set right now: the series you have switched on, your zoom, your labels and any pressure correction applied.
Hotlink images
Stored images of the whole flight, altitude only, not your current chart view. Transparent, regenerated whenever the flight changes, and safe to hotlink on a forum.
QR code
Links to this flight page. Useful on a range card or a club display.
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