CHCNAV BB4 UAV With DJI A3 Flight System User Manual

Introduction:

CHCNAV BB4 UAV consists three parts: an aircraft, a remote controller and the supporting DJI GO APR It is a four-rotor drone flight platform which built for LiDAR measurement system carried and multiple professional surveying & mapping applications. BB4 equipped with a customized DJI A3 dual-redundancy flight control system, which has industry-leading multiple safety guarantees and advanced intelligent flight functions. The snap-on foldable arms and foldable airscrew blades design are convenient for storage and transportation, also can effectively shorten the preparation time before take-off. The maximum take-off weight of BB4 is 28kg and it can be equipped with a variety of different types of sensors to meet the needs of various complex terrain environments.

Function Highlights:

Powered by two high-capacity and high-density LI-HV batteries which can effectively improve endurance time. Equipped with a battery management system to ensure power supply safety and reliability. BB4 also equipped with two SKYRC 1080 dual-channel parallel chargers, which can charge two LI-HV batteries at same time.

Adapt for multiple CHCNAV LiDAR systems such AS300, AS900HL and AS1300HL, which can meet the needs of multiple professional surveying & mapping applications. The remote controller integrates a built-in Lightbridge-2 high-definition image transmission ground station, which can match with the aircraft built-in Lightbridge-2 sky station, and user can view real time HD images via the DJI GO App on any mobile devices.

Installation:

Put BB4 on a flat ground:

Expand four drone arms from the inside to outside direction, then tighten the buckle to ensure it is tightly fixed with the aircraft body. If user need to withdraw drone arms, just use body to hold it against the other side of the buckle, and then loosen the buckle by hand easily.
Expand all airscrews.
Expand GPS-Compass and check that all airscrews point to the aircraft hand direction.

Battery Description:

BB4 equipped with two LI-HV batteries and two battery compartments, which can effectively improve endurance time. LI-HV lithium poly battery is a professional drone battery with 44000mah capacity, 52.2V voltage and a charge & discharge management function. This battery uses a new generation high-energy cell to provide sufficient power for the aircraft. The LI-HV battery must be charged by the standard special charger.

Battery Functions:

LI-HV lithium poly battery has below functions:

■ Balanced charging protection: Automatically balance the battery cell voltage to protect the battery.

■ Overcharge protection: Overcharging will seriously damage the battery. When the battery is fully charged, it will automatically stop charging.

■ Overcurrent charging protection: High current charging will seriously damage the battery.

The charger has a maximum 20A limits to avoid overcurrent charging.

■ Over-discharge protection: Over-discharge will seriously damage the battery. If the battery is discharged to 42.8V, the battery will cut off the output.

■ Communication: The aircraft can obtain battery information in real time, such as voltage and power.

Battery Connect/Disconnect:

Battery connect: Before connect battery, make sure to turn on the remote controller first, to ensure that BB4 can continually receive signal from controller. When connect battery, only need to connect two XT90 male ports of battery with two XT90 female ports of aircraft. During the connection, pay attention to the positive direction of the interface to ensure that the red and black wires correspond to each other (“+” pole pair to “+” Pole, “-” pole pair to “-” pole), and the interface is designed for anti-plug and anti-ignition which mainly to prevent short circuit between positive and negative poles, also designed for frequent ignition which may caused poor contact on the interface surface.

Battery disconnect: Before disconnect battery, make sure the remote controller is turn on. Do not turn off the remote controller in advance. When disconnecting battery, please only unplug the battery port separately. Do not pull & drag cable.

General Attention

a) Battery must be powered by equipped charger and do not change charger by user in case of any accident.

b) External short-circuit, destroy and crush are strictly forbidden for battery, in order to avoid battery leakage and fire.

c) Do not bump, drop, or hurt the battery.

d) Do not disassemble the battery.

e) Do not immerse the battery in water.

f) Do not use or place battery near heat sources

Battery Charging Requirements:

Item Requirement Comment

Charging Voltage	Use equipped charger	Do not use other brand charger for
Charging Current	Maximum 15A	battery charging

Battery connects with charger:

Refer to below figure to connect the lithium poly battery to the charger (Note: 6 lithium batteries are also called 6S lithium batteries). The charger supports charging two batteries at the same time. Connection steps: 1. Connect the balanced charging cable first; 2. Connect lithium battery.

Remote Controller:

The remote controller works with 2.4Ghz frequency band and the maximum communication distance is 7 kilometers. It integrates the new generation Lightbridge-2 HD image transmission system, which can directly output HD aerial images to mobile devices.

• Stick Mode: Control can be set to Mode 1, Mode 2 (by default), or a custom mode in the

DJI GO app. Recommend use Mode 2 for new user.

• Mode 1: The right stick serves as the throttle .

• Mode 2: The left stick serves as the throttle .

• Do not operate more than 3 aircrafts within the same area (size equivalent to a soccer field) to prevent transmission interference.

Controlling the Aircraft:

The default control mode of the remote controller is Mode 2 so this manual will choose Mode 2 as an example to describe the detailed steps.