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.

About This Document

This Remote Vehicle Flight Manual has been prepared to describe the complete operation of the airframe and flight control systems of the SIGMA25G remotely piloted aerial vehicle, and the normal maintenance of those items. Do not operate the SIGMA25G without reading and understanding this manual.

Version: v1.0

Authors: Ravi Maurya, Lakshya Jain, Ravi Singh

1.1 Warnings, Cautions, and Tips

1.2 Description

1.2.1 Three-Dimensional Views of the UAV

Front View
Side View
Top View

1.2.2 Dimensions of the UAV

Feature
Dimension

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

Recommended Position for Antennae

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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