LotusRC T80 Basic User manual

T80 Quadcopter LotusRC
T80 Basic
Quadcopter
Manual
Version 1.0
(Internal document)
(25 July 2011)
LOTUS
www.lotusRC.com
RC
™

T80 Quadcopter LotusRC
Read the follow words in red carefully before read the instruction, it links
to the safety and liability of user.
€safety proceeding:
1. This product is a video remote control model, rotating rotor poses risk.
People under 15years old please do not modulate and operate this
model.
2. Users are required of inertial model operating safety knowledge to
this product. We advise you operate it with professional people’s help
or guidance.
€disclaimers
1. Please do not utilize this product for anything illegal, users should
bear all responsibility occurred in using our product.
2. This model contains a large number of sophisticated components and
electronics, which may fail over time. LotusRC and our dealers
assume no responsibility to any losses, be it direct and indirect as a
consequence to this failure.

T80 Quadcopter LotusRC
Notice:
Upon purchasing this product, you automatically accept the above
agreement. May this product can bring you a satisfactory flying.
Table of content
Foreword:
Brief introduction…………………………………………………………………………….….…….........…5
1. Function and feature……………………………………………………………….…....…….…..…...5
2. Aircraft Dimensions.…………………………………… …………….………………..……….....…...6
3. Model parameter and specification…………………………………………….…………..…....7
4. Technical parameter…………………………………………………………….……............….…….7
Parts’name ………………………………………………………………………………….……………………..8
1. Major body components………………………………………………………….…………....………8
2. Electronics……………………………………………………………………………….………..…...….….8
3. Software system………………………………………………………………….…………….….….……9
Assembly…………………………………………………………………………….………….…….…...…….…9
1. Main body……………………………………………………………………..………………………..…….9
2. Foot stand ………………………………………………………………….………….……….....….……..9
3. Propellers……………………………………………………………….………………………….….………9
Connection set…………………………………………………………………………………….……….…...10
1. Receiver connection……………………………………………….…………………………...……….10
2. Battery installation…………………………………………….…………………..……….….……..…13
3. Remote controller set……………………………………….…………….……….…………...……..13
4. Operation and motion………………………………………….…………………………….….…….14
First flight………………………………………………………………………………………………………..…15
1. Protection while no signal…………………………………………….……………….……...…..…15
2. High throttle protection…………………………………………………….……….…………..…….16
3. Signal lost protection……………………………………………………………………..……………..17
4. Low battery protection………………………………………………………………..…..……………18

T80 Quadcopter LotusRC
Operation presentation……………………………………………………………….………..……………18
Packing list……………………………………………………………………………….……………….…….….19
Version illustration............................................................................................………19
Support and help………………………………………………………………….………….…………………19
Information feedback………………………………………………………………………………………....20
Fix Elucidation……………………………………………………………………………………………………..20
Foreword
Before utilizing T80 quad-copter, please read this instruction
carefully. It will help you to understand and know how to use it
with less time. If there still have some points can’t be realized
during this reading, please contact us, you will get perfect answer
and help here. In order to provide optimal service for you, please
purchase this product via legal channel. People utilize our product
in illegal action or any other unclear places, including get this
product via illegal channel, is not able to share our relative service
support.
To any illegal behavior which people copy our products and distributing,
marketing, circulating, our company will claim for their legal liability.
Base on the continuous improvement and enhancement of product
manufacturing techniques and producing workmanship, we maintain our

T80 Quadcopter LotusRC
rights on changing instruction and product parts, parameter index at any
time;therefore we will not inform our customer. You may know the
latest product development by logging our website, welcome to send us
any feedback of your feeling, opinions and suggestions during your
playing process at any time.
ⅠBrief instruction
1. Function and features
T80 quad-copter is a mini-type aircraft model designed for indoor and
outdoor recreational flight. It is able to hang light PTZ camera, and
take flight photography or do FPV fight.
1) Small dimension, light weight, taking off and landing vertically, low
flying noise, fit for small acreage or space flying and landing.
2) Safe and easy to play, flight stable. Built in flight balance stable system.
The operator do not need to replace the flight altitude frequently,
stable hovering and aerial flight can be achieved.
3) Use four same designed direct drive brushless motors, being
reasonable placed, have high power conversion and strong thrust.
4) Flexible flight entertainment and configurable applying ability,
hanging reasonable weight camera equipment is allowed for taking
flight photography, FPV, etc, all expandable apply activities.
5) All aircraft metal parts are processed by sophisticated CNC skill,
reasonably structured, have strong impact resistance, and also are

T80 Quadcopter LotusRC
durable.
6) Only need 4 remote control proportion channels to fly. Property core
system, it is compatible to all remote control equipments.
7) Dark grey transparent cover can do a help to observe aircraft working
condition.
2. Aircraft dimensions
(mm)
Profile and dimension

T80 Quadcopter LotusRC
Unfold dimension (mm) recommended battery placement
3. Parameter and specification
*this sheet is only for reference, product configuration may have little
alteration in different versions. Please subject to material object.
NO.
Components’
name
Specification
quantit
y
Unit Remarks
1 Main body cover PU composite 1 Set _
2 Cross arm carbon fiber 4 Pc _
3Foot stand
Silica gel, high
strength aluminum
1 Set _

T80 Quadcopter LotusRC
4. Technical parameter
4 Motor number
C`1803high efficiency
brushless
4 Pc
Special
purpose
5 Propeller
GWS7035frontal and
reversed propeller
4 Pc _
6
Brushless
electronic
controller
2S 6A electronic high
speed controller
4 Set
Special
purpose
7
Flight control
system
Inertial attitude self
stable system
1set
Special
purpose
Efficient
payload
Mini vidicon / camera ≤50grams standard

T80 Quadcopter LotusRC
*this sheet is only for reference, product configuration may have little
alteration in different versions. Please subject to material object.
Ⅱ. Components name
1. Aircraft components：
(Aircraft exploded view)
Maximum lift force Use850mAh standard battery 380grams _
Maximum payload Use 850mAh standard battery ≤80grams _
Maximum takeoff
weight
Use850mAh standard
battery
280grams Safety margin
Flight distance Depend on remote control
equipment and battery
capacity
_ _
Flight time 2S850mAh 15C battery 12mins Hovering
while no wind
Wind resistance ≤4 class _
Aircraft size 298x298x243 mm •3mm
Maximum expandable
size
475x475x128 mm •3mm
Motor to motor Diagonal
distance
between two
motor centers
Mm •3mm
Battery liPo 2S 850MaH 15c Standard
configurati
on
1300mAh is
usable
Unit ARF weight No battery, receiver,
applicable load
165grams •5grams
Takeoff weight 2S 850mAh battery, receiver 230grams Standard
configuration
2

T80 Quadcopter LotusRC
No. Components Name Quantity
1Cover 1
2Blade Holder 4
3Propeller 4
4Locking Block 4
5Brushless Motor 4
6Pedestal 2
7ESC 1
8FC 1
9Quad-copter Arm 4
10 Landing Gear 2
1
2
3
7
8
9
10
4
5
6

T80 Quadcopter LotusRC
2. Electronic equipments
1) High speed appropriative brushless electronic controller, can keep
outputting maximum currentt6A, with excellent payload
performance, special stop rotating protection methods, could
prevent over burning the power tube efficiently. Built in
communication signal monitoring mechanism, while inputting signal
was broke off, motors will be closed gradually.
2) Flight controller system utilizes high speed main control chip, it is
single chip, with nice capability and fast speed, working stable.
Combined with high performance MEMS workmanship transducer,
to reach stable and reliable attitude control. It is able to acquire
signal from 4 receiver channels at the same time, and make flight
attitude control available.
3. Software system
Specializing in development of quad-copter pneumatic layout
model, we own flight controller and high speed brushless
electronic control system with fully intellectual property right.
The simple and easy use idea, avoid many sophisticated setting
process. Help aircraft keep flight attitude stable and high
performance via automatic adaption parameter of intelligent
vague algorithm.

T80 Quadcopter LotusRC
Ⅲ. Assembly
1. Main body
In order to ensure product capability, aircraft main body has been
assembled before shipping, it contains all electronic equipments.
2. Foot Stand
3. Propeller
T80 utilizes 4 pieces frontal and versa propellers (7inch), match motor
shaft with loose threaded fix way, need to screw snugly by washer and
aluminum blade holder to make sure it is stable and safe. Frontal
propeller rotates by counter clock wise rotation with a symbol “7035”
on the cover; versa propeller rotates by clock wise rotation with a
symbol”7035R”. Propeller installation pictures are followed, front
and back one are frontal propellers, left and right one are versa
propellers, pay attention to this.
Attention: do not install propellers first，just do it after setting be
finished，it’s for safety
Ⅳ. Connection installation
1. Receiver connection
35M, 40M, 72M and 2.4G channel standard remote control
equipment, is compatible to market main brands: Spectrum, JR,
Sanwa, Futaba, Hi-TEC, GWS, WFLY, ESKY etc. a minimum 4channel
receiver is required to take off and land this aircraft vertically, hover,

T80 Quadcopter LotusRC
altitude hold, fly left, right, forward and back with ease.
RC equipment size after fully field tested:
Fasten the receiver on ARF inner side of cover or an appropriate place
under the main body by prepared VELCRO, plug flight controller signal
line in corresponding output channel of receiver in order. Channels of
Futaba and JR receiver are different; refer to follow pictures during
connection.
NO. Brands RC transmitter Receiver Remarks
1WFLY FT06-C FRP06 _
2Futaba FF9 R149DP _
3Futaba 6EX R146Ip _
4Futaba 10C _
4JR DSX7 RD721 _
5JR 9X11 _
5Spectrum DX7 AR7100 _
6Sanwa RD8000 92777 _
7Hi-TEC Eclipse7 FRP06 _

T80 Quadcopter LotusRC

T80 Quadcopter LotusRC
2. Battery installation
T80 aircraft motive power battery is fastened glutinously, easy to
dismantle. Battery with standard configuration is 2S 850mAh 15C 1P
L-poly battery, the maximum battery size is 2S 1300mAh. Flight time
will be extended accordingly, but battery capacity’s increase cannot
be ideal direct proportion with flight time, as battery’s increase
gained taking off weight, this will lower aircraft’s thrust-weight ratio
at the same time, make flight maneuver performance decline.
3. Remote controller installation
Set remote controller to be no mix control fixed wing mode, rudder
quantity 100%, rudder quantity curve of 1, 2, 3,4channel all set to
zero. Fine adjustment turn to middle level. If it is new remote
controller equipment, please confirm whether it is working well first.
Power on RC, and set accelerator to the lowest level, then put aircraft
on the stable flat ground; you may refer to the level benchmark
machine to put the aircraft on a approximate level condition, it’s vital
to hovering. Power on aircraft, then a warning tone will come out
from four brushless motors; you will hear one “beep” indicating that
FC starts work. 2seconds later a “beep”from FC means battery is full
charged. One second later another “beep”means RC signal is normal.

T80 Quadcopter LotusRC
A“beep-beep”short voice at 2seconds later indicating that aircraft
self-checking is finished, it’s time to start motors.
Attention: do not move the aircraft while it was powered on, aircraft
need to do self-checking on transducer, only after self-checking
finished, you can move it.
4. Operation and motion
T80 quad-copter is designed as a standard”+” flight mode. On account
of it is totally symmetry, there is no airframe direction features, need
to make a symbol to stand for flight direction. Put aircraft in front of
you with its obverse side, look down from the upside, yellow symbol
is the direction of head. it means the “front”side of flight direction,
diagonal side with yellow symbol, close to operator side, it is “back”;
on the left side it is “left”; right hand side is “right”, all directions are
the same with RC operation motion.
Please set RC corresponding channel’s frontal and versa rudder refer
to above materials.

T80 Quadcopter LotusRC
Ⅴ. First flight
1. Preparation before starting fly.
a. Check if all airframe parts installation is firm;
b. Check whether propellers are assembled correctly, propeller
clip are loose or not.
c. Check receiver and FC is connected reliable or not.
d. Check whether battery is fixed well
e. Detect whether remote control distance can fulfill flight
requirements.
2. Taking off and landing down
After aircraft powered up and self-checking is finished, gently push
accelerator to start motors, wait a moment and let motors finish
starting. Push accelerator little high properly, let propellers increase
rotating speed but not leave the ground, check whether aircraft is
drifting, correct it by rudder fine adjustment。Push the accelerator
gently, and aircraft can fly in sky.
Keep hovering condition while landing, and pull down accelerator
slowly, then you can land successfully. Taking off and landing features
of quad copter are totally same with helicopter, for users who are
familiar with helicopter model, T80 is easy to operate.
Attention:as affected by ground influence, airframe tilt phenomenon

T80 Quadcopter LotusRC
may take place while taking off; need to adjust rudder’s direction
properly.
3. Signal and forced landing
1)No signal protection: no RC signal while starting up, aircraft will enter
standby mode, red LED is blinking, and beeper has intermittent long
beep at the same time. Till get efficient RC signal, aircraft will out of
standby protection status.
2) High throttle protection: while powering up aircraft, RC accelerator is
not in low level, aircraft will enter accelerator protection mode, red,
green LED are blinking at the same time, beeper will have
“b-e-e-e-e-p” too, till accelerator turned back to a low p, aircraft will
out of safety protection mode.
3) Signal interrupt protection: during the work of the aircraft, once RC
signal interrupt is detected, FC red LED will blink, beeper will beep a
moment at the same time, to warn user the RC signal is lost, if it is in
flying status, FC security force landing function will start to land
aircraft automatically, during the force landing, beeper will keep
beeping. If signal recovered during landing, it will exit landing process,
continue normal flying.
Landing automatically can’t be less than 5sec, aircraft will have
enough time for landing, and definite landing time depends on
current flight height and accelerator location. It’s a limited

T80 Quadcopter LotusRC
self-protection landing, aimed at decreasing aircraft crash damage to
the minimum, it doesn’t mean the protection is perfectly safe, if your
receiver has control lose protection function, set is please.
4) Low battery protection: upon low battery, aircraft’s green LED will
blink, beeper has fast intermittent warning tone. Please land down
and replace aircraft battery. If user sticks to fly, aircraft will lower
flight height, till landing on ground. During low battery protection
process, RC operation still work.
Attention:while aircraft battery is low, please land down to replace
battery in time, low battery flight may make accident crash happen.
Ⅵ. Operation presentation
1. Red LED: remote control signal indicator light, blink while no remote
control signal, is light if remote control signal is well.
2. Green LED: battery voltage indicator light, blink while aircraft battery
is low, keep light if have enough power supply.

T80 Quadcopter LotusRC
LED indicator light status presentation:
No. Red Green Features Status presentation
1 1 1 Extinguish after
blink 1sec
Power up indicator, aircraft is in
initializing
2 X 1 Blinking Aircraft battery is low
3 X 1 Keep light Power supply is full
4 1 X Blinking No remote control signal
5 1 X Keep light Have good remote control signal
6 1 1 Synchronous blinking While powering up, accelerator is not at
low level
7 1 1 Keep light Normal operation
X=both, 1=keep light.
Ⅶ. Packing list
1. Main aircraft body be packed in advance include brushless ESC，FC，
motor;
2. Foot stand parts: include 4transparent silicone tubes
3. One frontal and one versa GWS7035 propeller, 3 sets
4. Bullet propeller clip 4 pieces include spring lamination.
5. VELCRO
6. One Product data CD.
7. One introduction
8. One factory test certification.
Ⅷ. Version illustration
Ⅸ. Support and help
1. Common troubleshooting reference table.