1. Introduction to Sigma 25G
Sigma 25G is a powerful and light small-class drone that comes in at 2.2 kg Take-off Weight and delivers an exceptional performance with low power consumption. With its sleek and rugged carbon fiber body and robust hardware, the Sigma 25G is a commercial drone that outshines its competition.

1.1 Warnings, Cautions, and Tips
This manual is not meant to be a substitute for adequate flight training.
Disregarding the following instructions leads to an immediate or severe deterioration of flight safety and hazardous situations, including resulting in personal injury and damage to property.
Training requirements can vary when operating in different countries or under different flight conditions. Always consult local regulations before flying the SIGMA25G. In areas where there are no flight training requirements, it is the sole decision of the pilot-in-command whether they have the appropriate level of training or experience for a given flight. Always set and adhere to personal minimums and fly within your own capabilities.
1.2 Description
1.2.1 Three-Dimensional Views of the UAV



1.2.2 Dimensions of the UAV
Length without propellers
13 in/331 mm
Width without propellers
17 in/426 mm
Height
8.3 in/210 mm
1.3 RC Controller Layout


1.4 Specifications
Number of Motors & Propellers
4
Motor Manufacturer
T-Motor
Propeller Manufacturer
APC Propellers
Propeller Size
12×4.5
Number of ESCs
4
ESC Manufacturer
T-Motor
Control Surfaces
NA
Flight Controller
CubePilot Orange
Firmware
Arducopter v4.1.5
Ground Control Software (recommended)
Mission Planner v1.3.7
Telemetry Frequency
2.4 GHz
Flight Modes
Loiter, Auto, AltHold
1.5 Abbreviations and Acronyms
VLOS
Visual Line of Sight
UAV
Unmanned Aerial Vehicle includes all components of the system required for the flight of an unmanned aircraft, including the radio controller, data link, and other related support equipment.
ISA
International Standard Atmosphere in which:
The air is a dry, perfect gas;
The temperature at sea level is 15° Celsius (59° Fahrenheit);
The pressure at sea level is 1013.2 bar (29.92 inches Hg);
The temperature gradient from sea level to the altitude at which the temperature is -56.5°C (-69.7°F) is -0.00198°C (-0.003564°F) per foot
and zero above that altitude.
MSL
Mean Sea Level is the average height above the surface of the sea for all stages of the tide.
ASL
Height of the aircraft as compared to the Sea Level.
AGL
Above Ground Level is the height of the aircraft above the ground.
OAT
Outside Air Temperature is the free static ambient air temperature surrounding the aircraft.
RTL
Return-to-Launch The flight mode that allows the aircraft to optimally return to the point of take-off, without feedback from the operator. Return-to-Launch is also known as Return-to-Land or Return-to-Home.
HDOP
Horizontal Dilution of Precision.
PPK
Post Processed Kinematic
GCS
Ground Control Software
FC
Flight Controller
1.6 Definitions
Throttle Stick
The RC stick responsible for throttle control. For the Pilot controller, this is the vertical movement of the left control stick.
Yaw Stick
The RC stick responsible for yaw (also called pan) control. For the Pilot controller, this is the lateral movement of the left control stick. For the camera operator controller, this is the lateral movement of the right control stick.
Pitch Stick
The RC stick responsible for pitch control. For the Pilot and camera operator controllers, this is the vertical movement of the right stick.
Roll Stick
The RC stick responsible for roll control. For the Pilot controller, this is the lateral movement of the right control stick.
Flight Mode Switch
The RC switch responsible for the flight mode control. For the Pilot controller, the flight mode switch allows you to change flight modes to Loiter, Auto, and AltHold.
RTL
The RC switch responsible to trigger RTL. The bottom position will trigger RTL.
Maximum Takeoff Weight (MTOW)
Maximum allowable weight at liftoff
Empty Weight
Weight of the aircraft without payload
Payload
The load carried by aircraft, necessary for aircraft functionality i.e: PPK Module, Camera
PPK Base Unit
PPK Unit present on ground (Reach RS2/Indrones Base)
PPK Rover Unit
PPK Unit present on the drone (Reach M2)
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