{"id":3320,"date":"2021-04-02T09:06:04","date_gmt":"2021-04-02T07:06:04","guid":{"rendered":"https:\/\/www.rocketronics.de\/?page_id=3320"},"modified":"2021-04-02T15:37:23","modified_gmt":"2021-04-02T13:37:23","slug":"altimax-g4-altimeter","status":"publish","type":"page","link":"https:\/\/www.rocketronics.de\/en\/altimeter\/altimax-g4-altimeter\/","title":{"rendered":"Altimax G4 Altimeter"},"content":{"rendered":"

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Universal altimeter and recovery control<\/h2><\/div>
The new Altimax G4<\/div><\/div>[vc_column_text]The new Altimax G4 altimeter: Suitable for the full range of model and high-power rockets. Highly integrated, it delivers a lot of function in a small space: only 68x26mm small, this altimeter offers unique functions. The 4th generation of the successful Altimax Altimeter benefits from the long experience in altimeter construction: The first Altimax Altimeter was created in 2008, and since then the technology has been regularly further developed.<\/p>\n

The Altimax system now consists of various altimeters with matching accessories. On this page we present the Altimax G4 with its options.[\/vc_column_text][vc_row_inner][vc_column_inner width=”1\/4″][vc_btn title=”Order now” color=”info” align=”center” i_icon_fontawesome=”fas fa-shopping-cart” css_animation=”bounceIn” add_icon=”true” link=”url:%2Fshop%2Fen%2Faltimax-g4.html”][\/vc_column_inner][vc_column_inner width=”1\/4″][vc_btn title=”Download manual” color=”info” align=”center” i_icon_fontawesome=”fas fa-shopping-cart” css_animation=”bounceIn” add_icon=”true” link=”url:https%3A%2F%2Fwww.rocketronics.de%2Fdownload%2Fdoku%2FALTIMAXG4-EN-MANUAL%2520en-US.pdf|target:_blank”][\/vc_column_inner][vc_column_inner width=”1\/4″][\/vc_column_inner][vc_column_inner width=”1\/4″][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row equal_height=”yes” bg_type=”bg_color” bg_override=”ex-full” seperator_enable=”seperator_enable_value” seperator_type=”tilt_left_seperator” seperator_svg_height=”60″ bg_color_value=”#f8f8f9″ css=”.vc_custom_1616761137314{padding-top: 50px !important;padding-bottom: 30px !important;}”][vc_column width=”2\/3″]

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How does it work?<\/h2><\/div>
Basic functions<\/div><\/div>[vc_column_text]The Altimax G4 is used to record flight data and trigger functions of the rocket. For this purpose, 4 MByte of flash memory are on board to store 5 flights, while on-board voltages, air pressure and acceleration are measured and recorded. A Kalman filter generates the rate of climb from this data, allowing the exact determination of the apogee. 3 pyro and 2 servo outputs enable the execution of actions, e.g. firing of igniters (for parachute ejection) or opening of flaps. There are also 3 I\/Os that can be freely assigned for control tasks. By means of an optional OLED display, LEDs and signal generator, the Altimax indicates its status. The Altimax G4 allows a wide variety of actions through its event system, multi-stage launches and multi-phase recovery, activation of transmitters, opening of flaps or ejection of cansats, every conceivable action can be implemented with the Altimax G4.[\/vc_column_text][\/vc_column][vc_column width=”1\/3″][vc_single_image image=”3382″ img_size=”400×251″ onclick=”link_image” lazy_loading=”true” css=”.vc_custom_1617367919636{padding-top: 30px !important;}”][\/vc_column][\/vc_row][vc_row equal_height=”yes” css=”.vc_custom_1616761143774{padding-top: 30px !important;padding-bottom: 30px !important;}”][vc_column width=”1\/4″][vc_single_image image=”3384″ img_size=”409×236″ lazy_loading=”true” css=”.vc_custom_1617367946005{padding-top: 30px !important;}”][\/vc_column][vc_column width=”3\/4″]
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Important for reliable function<\/h2><\/div>
The power supply<\/div><\/div>[vc_column_text]Power is supplied by batteries or rechargeable batteries with 7.2 – 12V. We recommend 2S LIPO batteries with 7.2V and 150-800mAh. If high current igniters are to be ignited, 3S-Lipos with 11V can also be used, then higher ignition currents are possible. The battery voltage is switched directly to the ignition outputs in case of ignition. To prevent this from causing a voltage drop and a system reset when the battery is low, the new BROWNOUTPROTECT<\/em> feature has been introduced: It monitors the battery voltage and regulates the ignition current so that the voltage does not drop below about 6V, thus ensuring safe ignition and preventing a system reset. Internally the Altimax runs with regulated 3.3V, the servos are supplied with 5V from a voltage regulator.[\/vc_column_text][\/vc_column][\/vc_row][vc_row equal_height=”yes” bg_type=”bg_color” seperator_enable=”seperator_enable_value” seperator_type=”tilt_right_seperator” css=”.vc_custom_1616761150163{padding-top: 30px !important;padding-bottom: 30px !important;}” bg_color_value=”#f8f8f9″][vc_column width=”2\/3″]
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Control outputs<\/h2><\/div>
Ignition and servo outputs<\/div><\/div>[vc_column_text]The Altimax has a number of outputs with which control tasks can be performed:<\/p>\n
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  • 3 pyro outputs with a continuous switching power of up to 15A, 40A peak<\/li>\n
  • 2 servo outputs with 5V max. 1A for RC servos with JR connector<\/li>\n
  • 3 digital on\/off outputs with 3,3V level and max. 20mA output current.<\/li>\n<\/ul>\n

    This can be used to fire igniters of all kinds, open flaps via servos or release parachutes (e.g. via a servo release).
    \nThe I\/O can be used for various control purposes, e.g. switch on an external signal generator after landing, activate a transmitter for tracking or be used as input for event control.<\/p>\n

    NEW: The pyro outputs are thoroughly checked for function by FETCHECK at startup, this ensures that the transistors are intact.<\/p>\n

    Each output is assigned an action, each input an event that is triggered when the level at the input changes.[\/vc_column_text][\/vc_column][vc_column width=”1\/3″][vc_single_image image=”3385″ img_size=”400×400″ style=”vc_box_rounded” lazy_loading=”true”][\/vc_column][\/vc_row][vc_row equal_height=”yes” css=”.vc_custom_1616761156755{padding-top: 30px !important;padding-bottom: 30px !important;}”][vc_column width=”1\/4″][vc_single_image image=”3386″ img_size=”409×236″ lazy_loading=”true” css=”.vc_custom_1617367986572{padding-top: 30px !important;}”][\/vc_column][vc_column width=”3\/4″]

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    Eyes and ears of the altimeter<\/h2><\/div>
    The sensors<\/div><\/div>[vc_column_text]There are 2 sensors on board, an air pressure sensor and an acceleration sensor. The air pressure sensor measures the air pressure with high accuracy, the software calculates the flight altitude from this. The resolution is approx. 15 cm. The acceleration sensor has a measuring range of +- 120G and can thus also measure very strong accelerations. The digital measurement data is filtered by a Kalman filter, this filter provides the vertical velocity, together with altitude and acceleration this flows into the sequence control. The software then decides on the basis of the data in which position the rocket is and reacts accordingly.[\/vc_column_text][\/vc_column][\/vc_row][vc_row equal_height=”yes” bg_type=”bg_color” bg_override=”ex-full” seperator_enable=”seperator_enable_value” seperator_type=”xlarge_circle_seperator” seperator_position=”top_bottom_seperator” seperator_svg_height=”60″ bg_color_value=”#f8f8f9″ css=”.vc_custom_1616761173412{padding-top: 30px !important;padding-bottom: 30px !important;}”][vc_column width=”2\/3″]
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    Universally usable<\/h2><\/div>
    The Altimax event system<\/div><\/div>[vc_column_text]The Altimax G4 has an event system unique to altimeters. It allows the linking of input signals, events and timers with actions and thus allows a very flexible response to attitude changes and times.\u00a0Events are generated by level changes at the 3 digital inputs, by reaching certain flight positions (e.g. reaching the peak), or by the expiration of one of the three timers. Internally, a series of events is generated by the flight attitude evaluation. The linkage is done via the PC software or the LCD terminal. There you can link every event with every possible action via a matrix in the settings! So there are more than 11000 combinations available, which are nevertheless very easy to set.[\/vc_column_text][\/vc_column][vc_column width=”1\/3″][vc_single_image image=”3404″ img_size=”400×390″ style=”vc_box_rounded” onclick=”link_image” image_hovers=”false” lazy_loading=”true”][\/vc_column][\/vc_row][vc_row equal_height=”yes” css=”.vc_custom_1616749992061{padding-top: 30px !important;}”][vc_column width=”1\/2″]
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    Analysis and flight data<\/h2><\/div>
    Possible events<\/div><\/div>[vc_column_text]Events are triggered based on the analysis of the flight data. The following events are possible:<\/p>\n

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      \n
    • Start (acceleration) – detected by acceleration<\/li>\n
    • Start (pressure) – detected by pressure change<\/li>\n
    • Combustion closure – when the thrust of the engine ends<\/li>\n
    • Machdelay – When the Machdelay timer has expired<\/li>\n
    • Altitude ascent – Altitude exceeded during rocket ascent<\/li>\n
    • Timer 1 End – Sequence of an adjustable timer<\/li>\n
    • Timer 2 End<\/li>\n
    • Timer 3 End<\/li>\n
    • Apogee acceleration – Apogee point calculated by acceleration<\/li>\n
    • Apogee pressure – Apogee point calculated by pressure change<\/li>\n
    • Height descent – Altitude undershot after reaching the apogee point<\/li>\n
    • AUX1 level change – When the level of input AUX1 changes<\/li>\n
    • AUX2 level change – Dito for AUX2<\/li>\n
    • AUX3 level change – only if the AUXn is also set as input!<\/li>\n
    • Landing<\/li>\n<\/ul>\n

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      Analysis and flight data<\/h2><\/div>
      Possible actions<\/div><\/div>[vc_column_text]The following actions can be linked to an event:<\/p>\n
        \n
      • Timer 1 Start – Starts timer 1<\/li>\n
      • Timer 2 Start – Starts timer 2<\/li>\n
      • Timer 3 Start – Starts timer 3<\/li>\n
      • PYRO 1 – Activates output Pyro 1<\/li>\n
      • PYRO 2 – Activates output Pyro 2<\/li>\n
      • PYRO 3 – Activates output Pyro 3<\/li>\n
      • SERVO 1 – Activates output servo 1<\/li>\n
      • SERVO 2 – Activates output servo 2<\/li>\n
      • AUX1 – Activates digital output AUX1 (if this is set as output!)<\/li>\n
      • AUX2 – Activates digital output AUX2 (if this is set as output!)<\/li>\n
      • AUX3 – Activates digital output AUX3 (if this is set as output!)<\/li>\n<\/ul>\n

        [\/vc_column_text][\/vc_column][vc_column css=”.vc_custom_1616761241885{padding-top: 30px !important;padding-bottom: 0px !important;}”][vc_single_image image=”3388″ img_size=”1400×359″ alignment=”center” style=”vc_box_rounded” lazy_loading=”true” title=”Successful operations at the Cansat competition”][\/vc_column][vc_column][vc_column_text]Thousands of rocket launches have been successfully performed with the Altimax Altimeters. Large as well as small projects flew with the Altimax, worldwide from Australia to USA they are in use, from black powder to hybrid engines everything was there. Among other things, it ensures accurate launching of the Cansats and safe two-phase recovery at the German Cansat Competition. In the joint projects of the AG Model Rockets, Altimax Altimeters ensured safe recovery of the Proton and the Saturn V. The Altimax is also used in research and teaching, and many universities in Europe use it in rocket projects. Last but not least, it has been used by the developer in all rockets since the beginning, all Level 1 – Level 3 rockets flew successfully with it.[\/vc_column_text][vc_column_text]<\/p>\n

        Comparison of the currently offered altimeters<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
        \u00a0<\/strong><\/span><\/td>\nAltiMAX G4<\/strong><\/span><\/span><\/td>\nAltimax Simply 2018<\/span><\/td>\n<\/tr>\n
        Dimensions<\/td>\n68×26 mm<\/span><\/td>\n35×21 mm<\/span><\/td>\n<\/tr>\n
        Weight<\/td>\n13 g<\/span><\/td>\n4,6 g<\/span><\/td>\n<\/tr>\n
        Input voltage:<\/td>\n7,2 \u2013 12 V<\/span><\/td>\n3,3-12 V<\/span><\/td>\n<\/tr>\n
        Power consumption* (without servos and terminal)<\/td>\nCa. 23 mA<\/span><\/td>\nca. 5 mA<\/span><\/td>\n<\/tr>\n
        Pressure range<\/td>\n10 \u2013 1200 hpa<\/span><\/td>\n0 – 1200 hpa<\/span><\/td>\n<\/tr>\n
        Height range<\/td>\n-170 \u2013 31000 m\u00a0\u00a0 \u00fc.N.N<\/span><\/td>\n-170 \u2013 31000 m\u00a0\u00a0 \u00fc.N.N<\/span><\/td>\n<\/tr>\n
        Memory<\/td>\n4 Mbyte<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
        Number of ignition channels<\/td>\n3<\/span><\/td>\n2<\/span><\/td>\n<\/tr>\n
        Number of servo channels<\/td>\n2<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
        Number of additional I\/Os<\/td>\n3<\/span><\/td>\n\u00a0<\/span><\/td>\n<\/tr>\n
        Ignition duration<\/td>\n3 Sec<\/span><\/td>\n1 Sec<\/span><\/td>\n<\/tr>\n
        Ignition voltage<\/td>\n=Battery voltage<\/span><\/td>\n=Battery voltage<\/span><\/td>\n<\/tr>\n
        Max. Ignition current<\/td>\n15A\u00a0<\/span><\/td>\n9A<\/span><\/td>\n<\/tr>\n
        Accelerometer<\/td>\nYes +-120G<\/span><\/td>\nNein<\/span><\/td>\n<\/tr>\n
        Servo supply<\/td>\n5V, max 1 A<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
        \u00a0<\/strong><\/span><\/td>\n\u00a0<\/span><\/td>\n\u00a0<\/span><\/td>\n<\/tr>\n
        Resolution height<\/td>\nca. +- 0,15 m<\/span><\/td>\nca. +- 0,15 m (1m Ausgabe)<\/span><\/td>\n<\/tr>\n
        Resolution acceleration<\/td>\n+- 0,04G<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
        Sampling rate pressure<\/td>\n204.800 sps<\/span><\/td>\n204.800 sps<\/span><\/td>\n<\/tr>\n
        Sampling rate acceleration<\/td>\n200 sps<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
        Storage rate**<\/strong><\/span><\/td>\n200 sps \/ 40 sps<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
        Storage duration approx.<\/td>\n5 Flights a 10 min.<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
        \u00a0<\/strong><\/span><\/td>\n\u00a0<\/strong><\/span><\/td>\n\u00a0<\/span><\/td>\n<\/tr>\n
        \u00a0<\/strong><\/span><\/td>\n\u00a0<\/strong><\/span><\/td>\n\u00a0<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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        Accessories for the Altimax G4<\/h2><\/div><\/div>[vc_zigzag color=”blue”]<\/div>[\/vc_column][\/vc_row][vc_row equal_height=”yes” css=”.vc_custom_1616761203305{padding-top: 30px !important;padding-bottom: 30px !important;}”][vc_column width=”2\/3″]
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        For setting and evaluation<\/h2><\/div>
        Free PC software<\/div><\/div>[vc_column_text]A free software for Windows is offered. With it, the settings of the Altimax can be changed and tests can be performed. The event system is very easy to edit here, you just click together the connection from event to action.<\/p>\n

        Tests of the outputs and setting of the servo positions can be reached by mouse click. In addition the software of the data evaluation serves, the flight data can be read out over the USB connector and then be represented graphically. Events and actions are also displayed. Export functions allow the export as image or Excel table. The data can also be saved and reopened later.<\/p>\n

        The software is free of charge and available in english and german language.[\/vc_column_text][\/vc_column][vc_column width=”1\/3″ css=”.vc_custom_1616754466982{padding-top: 30px !important;}”]