Multi remote standards telemetry, JetCat/ Xycoy/ Jrojet ECU interface, IAS and AoA indicator/warning, autothrottle and datalogger.
The Jeti ASSI device is a versatile unit with a number of subsystems. It features many useful functions specifically dedicated to jet modelers.
It was designed by Carsten and is produced in-house by Ultimate Jets. Development is made in cooperation between Carsten and Oli.
Compatibility with radio systems:
All Jeti Ex transmitters.
Here is what this wonderful unit can do for you.
1. It measures the following:
IAS, Angle of Attack (AoA) (optional), actual G forces, GPS data ( optional, via our CAN-GPS board), radio altimeter, pitch, roll, yaw data ( optional via our CAN-RA-IRS ), temperatures from -200 to 1300 c ( optional, via CAN-TEMP board ).
2. It collects valuable data from your JetCat, Xycoy or Hornet controlled engine(s), monitors receiver signal quality and the number of failsafe frames.
3. It can control the throttle (auto throttle) of your engine(s), maintain programmed IAS for 5 flap positions and issue warning signals using ultra-bright LEDs if the IAS is above/below the programmed speed.
4. Using a communication bus (CAN Bus) the device will also show engine data on a cockpit mounted LCD screens (optional) in the plane through our CAN-LCD screen.
The data can also be used by another slave unit in a multi engine setup.
5. All of the parameters sampled will be logged into a SD card mounted in the device. The Master device will log a complete set of data whereas the slave devices will only log the ECU data.
6. It will return up to 12 telemetry values to your transmitter ( EX telemetry ). This data can be displayed on any modern Jeti transmitter transmitter. Data can be configured through the device explorer on board the transmitter.
Here is the simplified schematic of the ASSI inputs and outputs.
The slave devices only collect data from the connected ECU and controls the throttle
channel to it. The throttle setting is provided by the master device. The slave device can
also only output 4 telemetry values (ECU data).
The ASSI programming is done through a simple log file that can be edited from a PC and that must be loaded on the device SD card.
The ASSI device can be configured as master or slave for respectively single or multi engine configuration
Here is a detailed description of the telemetry capability of the device:
"ECU" (data from JetCat ECU):
"ECU" (data from Xycoy ECU):
"ECU" (data from Hornet ECU):
"AUX COM" (Auxiliary communication to other devices):
CAN bus for connection to slave devices (in multi engine setups) and to cockpit mounted
graphic LCD color display(s)
"DATALOG" (SD card data logging):
A data logger that stores all data (including servo positions, ECU data, IAS/AoA, failsafe counts ) . These logs can be converted at a later stage into a KML format where you'll see the actual flight path in Google Earth together with all the parameters logged each second.
ASSI connections on a single engine setup:
ASSI connections on a dual engine setup:
The dual engine setup will enable the pilot to see both engines parameters as well as fuel quantity.
Audio alerts can be configured for an engine failure condition by monitoring ECU RPM ( spool-down/ Thrust-down detection ) or Pump Voltage ( immediate detection ).
Here is a video demonstration of the system capability on a DC-24:
L: 64 mm
W: 37 mm
H: 14 mm
Weight: 15 grs
Consumption: 25 to 125 mAh
Sold as a nude board without pitot tube or AOA sensor.