Altis v4+

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The Altis v4+ is well known device used by many R/C modellers as competition altimeter, recording altimeter or telemetry altimeter/vario.

  • It supports all current electric sailplane competition formats like F5J, ALES several local formats RCEV, F5J Greek, but also w/o electric motors sailplanes like F3J/F3B with additional tow hook sensor.
  • Integrated Flash memory with 4MB of capacity allows to record several hours of flight for later review in Altis Flight manager PC Application.
  • Additional connectivity of Altis V4+ device makes from Altis v4+ perfect telemetry altimeter with precise Vario. AerobTec is now supporting telemetry for JETI Model, Futaba, Multiplex, Graupner, FrSky, Hitec, Spektrum.
Temple of Bel (floating).


General Competitions Recording Telemetry
  • Dimensions: 20 x 33 x 6.5mm, cable length approx. 10cm
  • Weight: 8g with JR cable
  • Power supply range: 4 – 12.6V
  • High contrast OLED display (96x48px, configurable screen)
  • Integrated USB (USB2.0 device enumerated as Mass Storage)
  • Upgradeable firmware
  • Support for all existing competition rules (standard firmware)
  • Special competition firmwares:
    • F5J FAI (FAI certified firmware)
    • F5J Greek (local Greek F5J like competition)
    • RCEV – (like F5J FAI but with motor restart option)
    • Energy limiter with external AerobTec Power Sensor
  • Memory: 3.9MB (approx. 15 hour record with 0.1s sampling)
  • Sample time: 0.1 – 25.5s (user selectable with step 0.1s)
  • Logging values:
    • altitude / vario
    • voltage
    • temperature
    • PWM IN/OUT
    • PWS Voltage (*
    • PWS Current (*
    • PWS Consumed energy (*

(* Only with external AerobTec Power Sensor

  • Rich telemetry support for all relevant RC systems
  • Available telemetry data:
    • High precision altimeter
    • Fast reacting vario with auto adaptive filter
    • Pressure
    • PWM In/Out value
    • F5J height

Competition Support

Telemetry connectivity

The Altis v4 can be used as high precision altimeter and fast reacting vario. Also several additional (temperature, atmospheric pressure, F5J altitude) information can be send trough telemetry link of your favourite R/C System.

Table of currently supported R/C Systems

Brand Altitude Vario Temperature Atmospheric Pressure F5J Altitude Note
JETI Yes Yes Yes Yes Yes Works with both old style Jeti telemetry and Jeti EX
Multiplex MSB Yes Yes Yes Yes Yes Altis v4 uses fixed MSB addresses see Multiplex section lower

Multiplex MLink

Altis V4 an be connected into Multiplex MLink telemetry receivers directly trough COMA or COMB ports on Altis v4.

MSB addresses

Value MSB Address
F5J Altitude [m] 2
Altitude [m] 3
Vario [m/s] 4
Temperature [°C] 5
Altis supply Voltage [V] 6
Throttle Input [us] 7
Throttle Output [us] 8

Latest Firmware

There are several types of firmware available for Altis v4 device.

  • The most generic firmware is so-called standard firmware. This firmware allows users to changed every settings they want so there is no restriction in functionality of device itself. This type of firmware is not allowed for some official sailplane contests (FAI for example). Typical numbering of this firmware is x.y where x can be from 1 to 4 and y from 0 to 9
  • F5J FAI firmware is certified firmware by World Air Sports Federation (FAI) for official F5J FAI contests. User can changed only logging settings other settings including telemetry are blocked by this firmware to fulfill FAI ARMT device specification. Typical numbering of this firmware is 5.y where y can be from 0 to 9.