UAS OSC Volume 2

Operator ID:

UAS Operating Safety Case
Volume 2 - UAS Description:

Document reference number:

Document version and date:

Amendment Number

Date

Amended by

Details of changes

UAS Model

Agras T30

UAS design & manufaturing organisations

DJI

Empty Mass

Total weight (without batteries):
26.4 kg

Maximum Take-Off Mass (MTOM)

Maximum take-off weight:
78 kg (near sea level)

Dimensions for Rotorcraft / Multirotor

Length of aircraft body

Dimensions:
2,858 mm x 2,685 mm x 790 mm (with arms and blades unfolded)
2,030 mm x 1,866 mm x 790 mm (with arms unfolded and blades folded)
1,170 mm x 670 mm x 857 mm (with arms folded)

Width of aircraft body

Height of aircraft body

Propeller Configuration

Propeller Dimensions

Maximum rotor distance:
2,145 mm

Sound power level

Any other relevant information

Maximum airspeed

Maximum operating flight speed:
7 m/s

Maximum level speed:
10 m/s (with good GNSS signal)

Minimum airspeed to maintain safe flight

Normal/typical operating height

Maximum flight altitude:
4,500m
*Reduce the pesticide load by 12% for each increase of 1,000 meters in altitude.

Maximum operating height

Maximum flight time during normal operation

Maximum flight time on an ISA day at cruising speed at normal/typical operating height.

Maximum flight range on an ISA day (normal and emergency conditions)

Glide distances

Maximum radio range of the C2 Link

Wind speed limits

Maximum tolerable wind speed:
8 m/s

Turbulence restrictions

Precipitation limits

OAT limits

Recommended operating ambient temperature:
0 Deg.C to 45 Deg.C

In-flight icing condition limits

Any other relevant information

Maximum thrust-to-weight ratio:
1.70 @ takeoff weight of 66.5 kg

Recommended operating ambient humidity:
< 93%

Type of material

Material characteristics or properties

Any other relevant information

Batteries:

Battery type, model and manufacturer

Capacity:
29,000 mAh

Model:
BAX501-29,000mAh-51.8V

Quantity

Arrangement

Generator:

Generator type, model and manufacturer

Specification

Electrical loads

Voltage:
51.8 V

Electrical load shedding functionality

Discharge rate:
11.5C

Power supply redundancy

Procedures to charge and discharge batteries.

Safety provisions with regards to hazards inherent to high-voltage storage devices:

Procedures in place for safe handling by any person who may come into contact with high-voltage storage devices

Means of identifying high-voltage storage

Safety provisions for any person discovering the UA following an accident.

Procedures and safety provisions to mitigate the risk of battery thermal runaway.

Procedures for monitoring high-voltage storage devices.

HMI:

Information indicated to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Water-resistance rating:
IP54 with board-level potting protection

Propulsion type

Engines:

Type, model and manufacturer

Stator size:
100 x 18 mm

Propeller type, model and manufacturer

Diameter × pitch:
38 x 20 inch

Weight (a single blade):
106 g

Quantity

Arrangement

Power output

Maximum power consumption:
11,000 W

KV value:
77 rpm/V

Maximum power:
3,600 W/rotor

Propeller guards

In-flight restart functionality

Performance monitoring

Health monitoring

Safety features and redundancy in the system that allow maintaining flight after a failure or degradation has occurred in the propulsion system.

Fuel-powered propulsion system – Safety features to mitigate the risk of engine loss when the following hazards occur:

Fuel starvation

Fuel contamination

Failed signal input from the control station

Engine controller failure

Indication to the remote pilot

Electric-powered propulsion system:

Power source and supply management with regards to other systems in the UA

Redundant power sources

Maximum continuous power output of the motor

Maximum peak power output of the motor

Electrical distribution architecture

Electrical load shedding functionality

HMI:

Information indicated to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Weight:
756 g

Maximum pull:
18.7 kg/rotor

Fuel type

Safety provisions with regards to hazardous substances within the fuel system:

List of hazardous substances and their characteristics.

Procedures in place for safe handling of the UA by any person who may come into contact with the hazardous substances.

Means of identifying the hazardous substances.

Safety provisions for any person discovering the UA following an accident.

HMI:

Information indicated to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Design and operation of flight control units, surfaces, actuators, control linkages, etc.

Flight controller:

Type, model and manufacturer

Model:
RM500-ENT

Functions

Flight modes available

Automatic functions:

Take-off and landing

Stabilisation

Autopilot

3D operation planning by the AI smart engine:
√

Return to home

Intelligent endurance/return function:
√

If functions are provided by COTS equipment, provide type, model and manufacturer.

Safety features and redundancy in the system which allow maintaining flight after a failure or degradation of the flight control system, including indication to the remote pilot.

HMI:

Information indicated to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

D-RTK technology:
√

Sensors

Type, model and manufacturer

Quantity

Telemetry links

Method to determine current position.

Method to navigate to intended destination.

Automatic/automated navigation functions

Geo-awareness functions

Containment functions

Safety features and redundancy in the system which allow maintaining flight after a failure or degradation has occurred in the navigation system:

Backup means of navigation

Detection of and response to loss of primary means and secondary means of navigation.

Indication to the remote pilot

HMI:

Information indicated to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Hovering precision (with good GNSS signal):
With D-RTK enabled:
±10 cm (horizontal) and ±10 cm (vertical)
With D-RTK disabled:
±0.6m (horizontal) and ±0.3m (vertical) (with the radar function enabled: ±0.1m)

RTK and GNSS frequency bands:
RTK: GPS L1/L2, GLONASS F1/F2, BeiDou B1/B2, and Galileo E1/E5
GNSS: GPS L1, GLONASS F1, and Galileo E1

DAA system functions

Model:
RD2424R

Obstacle avoidance system:
Perceivable distance: 1.5-30 m
View angle (FOV): Horizontal: 360 Deg., vertical: ±15 Deg.
Conditions of use: The relative altitude of the drone must be greater than 1.5 m and the speed less than 7 m/s
Safety distance: 2.5 m (the distance between the tip of the propeller and the obstacle after the drone decelerates to a hover)
Obstacle avoidance direction: Horizontally omnidirectional obstacle avoidance

Height maintenance and terrain adaptation:
Height measurement range: 1-30 m
Height-maintenance range: 1.5-15 m
Maximum slope in mountain mode:35 Deg.

High-precision radar:
√ Spherical Omnidirectional Radar System

Top-view radar module:
√

Model:
RD2414U

Overhead obstacle avoidance:
Perceivable distance: 1.5-10 m
View angle (FOV): 80 Deg.
Conditions of use: During take-off, landing, and climbing when the relative distance between the drone and the object above is greater than 1.5 m
Safety distance: 2 m (the distance between the highest point on the top of the drone and the obstacle after the drone brakes and hovers stably)
Obstacle avoidance direction: Above the drone

Devices used

Technology used

Interface between the DAA system and the flight control computer

Limitations of the DAA system

Water-resistance rating:
IP67

Water-resistance rating:
IP67

Evidence of equipment qualification and approval.

DAA event sequence:

Level of automation

Actions required by the remote pilot

Means to verify normal system operation.

HMI:

Information indicated to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Operating frequency:
SRRC/NCC/FCC: 24.05 - 24.25 GHz
MIC/KCC/CE: 24.05 - 24.25 GHz

Operating power consumption:
12 W

Equivalent isotropic radiated power (EIRP):
SRRC: < 13 dBm; NCC/MIC/KCC/CE/FCC:< 20 dBm

Operating frequency:
SRRC/NCC/FCC:24.05 - 24.25 GHz
MIC/KCC/CE:24.05 - 24.25 GHz

Equivalent isotropic radiated power (EIRP):
SRRC:< 13 dBm; NCC/MIC/KCC/CE/
FCC:< 20 dBm

Operating power consumption:
4 W

Power sources, supply management and redundancy.

Built-in batteries:
18650 lithium-ion battery (5,000 mAh at 7.2V)

Power supply current/voltage of the remote control USB-A port:
5 V / 1.5 A

Model:
WB37-4,920mAh-7.6V

Radio signal:

Determination of the signal strength and health value.

Threshold values which represent a critically degraded signal.

Control handover between two CUs

Safety features to mitigate the risk of inadvertent command activation:

List of critical commands

Mitigation means

Safety features to mitigate the risk of display or HMI lock-up.

Safety features to maintain flight-critical processing when multiple programs are running concurrently.

HMI:

Information indicated to the remote pilot.

Radio signal strength and/or health indication to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Battery life:
2 hours

Operating ambient temperature:
-10 Deg.C to 40 Deg.C

RLOS

BRLOS

Antennas:

Type, model and manufacturer

Locations on the UAS

Transceivers / Modems:

Power levels

Wi-Fi EIRP:
2.4 GHz
SRRC/CE: 18.5 dBm; FCC/MIC/KCC:20.5 dBm;
5.2 GHz
SRRC/FCC/CE/MIC: 14 dBm; KCC: 10 dBm;
5.8 GHz
SRRC/FCC: 18 dBm; CE/KCC: 12 dBm;

Bluetooth EIRP:
SRRC/MIC/FCC/CE/KCC:6.5 dBm

EIRP of the operating frequency of the Ocusync Industry Edition:
2.4 GHz
SRRC/CE/MIC/KCC: 18.5 dBm;
FCC: 29.5 dBm;
5.8 GHz
SRRC: 20.5 dBm;
FCC: 28.5 dBm
CE:12.5 dBm

Transmission schemes

Bluetooth protocol:
Bluetooth 4.2

Wi-Fi Protocols:
Wi-Fi Direct, Wireless Display, and 802.11a/g/n/ac
Supports 2 x 2 MIMO Wi-Fi

Operating frequencies

Details of frequency spectrum approvals

Wi-Fi operating frequency:
2.4000 - 2.4835 GHz
5.150 - 5.250 GHz
5.725 - 5.850 GHz

Bluetooth operating frequency:
2.4000 - 2.4835 GHz

Operating frequency of the Ocusync Industry Edition:
2.4000 - 2.4835 GHz
5.725 - 5.850 GHz

Effective signal range at the Ocusync Industry Edition operating frequency (without interference and blockage):
SRRC: 5 km; MIC/KCC/CE: 4 km; FCC: 7 km
(measured when the operating height of the drone is 2.5 m)

Maximum power output/range

Type of signal processing

Datalink margin in terms of the overall link bandwidth at the maximum anticipated distance from the CU.

Operational C2 link management:

Frequency switchovers

Contingency situations

Third party link service provider

Radio signal:

Determination of the signal strength and health value

Threshold values which represent a critically degraded signal.

Minimum and average assured data rates

Minimum and average assured latencies

Design features and procedures to maintain availability, continuity, and integrity of the datalink:

RF or other interference

Flight beyond communications range

Antenna masking

Loss of CU functionality

Loss of UA functionality

Atmospheric attenuation

Safety features to mitigate the risk of loss of C2 link:

C2 links redundancy

Automatic triggering of an emergency recovery function

Automatic return to home

Safety features to mitigate the risk of harmful interference.

HMI:

Information indicated to the remote pilot.

Radio signal strength and/or health indication to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Antennas:

Type, model and manufacturer

Locations on the UAS

Communication method:

VHF

GSM network

Satellite

Safety features to mitigate the loss of communication function:

Primary communication means

Secondary / back-up communication means

HMI:

Information indicated to the remote pilot.

Radio signal strength and/or health indication to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Wheels, skids, rails, launchers, etc.

If various mechanisms can be fitted:

Primary mechanism

Secondary mechanisms

Operational conditions/requirements for each mechanism.

Any other relevant information

Mode of operation

Safety features which mitigate the risk of loss of control or situational awareness.

Means to verify normal system operation.

HMI:

Information indicated to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Type, model and manufacturer

Locations on the UA

Colour

Operation

Operating modes

Purpose

HMI:

Information indicated to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Types

Mass

Maximum load of the spreading tank:
35kg

Spreading system weight:
3.9kg

Interfaces with the UA:

Mechanical interface

Electrical interface

Input voltage:
Power: 60V
Control:15V

Data interface

Release mechanism

Any other interface

Procedures to install the payload onto the UA.

Effects of the payload on the UA

Sensors

Safety features to mitigate the risk of the payload affecting the flight of the UA:

Effects on aerodynamics

Effects of electro-magnetic interference.

Effects of electrical power and / or data connection failures on the UAS.

Effects of complete detachment of the payload from the UA (either caused by a failure or through intentional lowering / dropping of the payload).

Effects of partial detachment of the payload from the UA.

Distraction of the remote pilot generated by the payload during flight.

Procedures to verify the attachment points to the UA.

Procedures to verify the UA MTOM and CG location.

Procedures to detect and mitigate any failure of the payload in flight.

Safety provisions with regards to hazards inherent to the payload

Procedures in place for safe handling of the payload.

Means of identifying hazards.

HMI:

Information indicated to the remote pilot.

Alert messages indicated to the remote pilot.

Any other relevant information

Operation tank volume:
30L at full load

Operating load:
30 kg at full load

Maximum power:
60V@250W
15V@50W

UAS launch and recovery systems

Power sources

Transportation equipment

Backup or emergency equipment

Procedures to transport UA, CU, battery/fuel, and other equipment between operation sites and from the loading/off-loading area to the take-off/landing area.

Storage of ground support equipment.

Suitability of the ground support equipment and transportation method with regards to the UAS components’ fragility, sensitivity or inherent hazards.

Ground support equipment standards

Ground support equipment manufacturer's recommendations.

Any other relevant information

Maintenance manual:

Structure

Maintenance procedures:

Inspections

Overhaul

Repairs

Assurance of repair procedures

Batteries maintenance during storage periods

Origin of each procedure

Maintenance schedules

Procedures to record maintenance that has been carried out.

Storage of maintenance records

Staff qualification and levels of approval.

Procedures to use the manual by the Maintenance staff

Configuration control

Any other relevant information

Sources of procurement

Process to confirm the suitability of the part.

Any other relevant information

Hardware, software, and firmware version control

Modification standards

Modification records storage

Safety assessment associated with the modification

Any other relevant information

Step 1 – Identify the main functions of the UAS.

Step 2 – Identify the sub-functions.

Step 3 – Consider the ways each function may fail.

Step 4 – Identify the failure conditions.

Step 5 – Select those failure conditions that may lead to mid-air collision or harm to uninvolved people on the ground. (Identified Hazard)

Step 6 – Assurance

Step 7 – Describe the consequence of the failure condition.

Step 8 – Describe the failure modes. (Unmitigated Failures)

Step 9 – Identify the single points of failure.

Step 10 – Describe the risk mitigation means.

Feature

Drone parameters

Chassis parameters

Power system - Motor

Power system - Propellers

Power system - ESC

FPV cameras

FPV searchlights

Spraying system - Operation tank

Spraying system - Nozzles

Spraying system - Water pump

Spraying system - Flowmeter

Omnidirectional obstacle avoidance radar

Top-view radar

Battery

Remote control

Built-in batteries of the remote control

External smart battery of the remote control

Charging assistant of the remote control external smart battery

Power adapter of the external smart battery charging assistant

T30 Spreading System 3.0

T30 smart charging manager

Notes