Flight Mechanics, Flight Control and Aeroelasticity


The AlphaLink Unmanned Aircraft Experimental System (UAXS) is a set that consists of software and hardware for experimental purposes. The AlphaLink UAXS set includes:

  1. Airborne System (ZOHD Nano Talon EVO PNP),
  2. Flight Control Computer (Pixhawk 4 Mini),
  3. GPS Module (UBLOX NEO M8N GPS),
  4. Airspeed Sensor (Holybro Digital 4525DO Sensor),
  5. Telemetry Set (Pixhawk 4 433 Mhz 100 mW V3, EU),
  6. USB Stick with all relevant software and this manual
  7. LiDAR Sensor,
  8. Access to Virtual Flight Test Environment (AlphaLink software),
  9. Remote Control (FrSky Taranis Q X7 RC Transmitter 2.4 GHz with 16 channel) and RC Receiver (FrSky R-XSR EU LBT),

Airborne System

The Talon Nano Evo is a fixed-wing aircraft with V-tail. Table 1 lists the most important aircraft parameters. Three aerodynamic rudders and thrust are available as input variables. Left and right aileron are actuated by a common servo motor. Left and right V-tail rudder have different servo motors and, hence, can be deflected independently. A control allocation is made for consideration of conventional control surfaces and is implemented in the Direct Law model. It can be changed as required. The aerodynamic rudders are limited within ±25°. The rotational speed of the motor is used as thrust command. The value is limited between 0 and 1. A value of 1 means maximum rotational speed while a value of 0 means full stop of the motor.

Wingspan0.86 mWing Area0.148 m²
Aspect Ratio5.1Length0.57 m
Take-Off Mass0.65 kgBattery Capacity1550 mAh
Servo Motors3x 9g metal gearMotorSunnySky 2204-1870KV
Propeller6x 3 inchESC30 A, 5 V 2 A BEC
Table 1: Properties of Talon Nano Evo