HongKong GuLang Model Technology 450C User manual

Features:Features:
1. RTF version
2. CCPM control system
3. Auto-rotation system
4. Rear tail servo mount
5. Professional main rotor head design
Thank you for buying our company products. The 450C is RTF RC helicop-
ter, whick is design for 3D beginers. It can finish all kinds of 3D
performences.
450C MANUAL450C MANUAL

Foreword
Thank you for buying our helicopter product. Please read this manual carefully
before assembling and operating the helicopter. in order to use 500 series helicop-
ters more conveniently,At the same time,please keep this manual for future reference
regarding adjusting and maintaining.(500 is the product that researched by Gulang
themselves,it’s the best choice to the beginners who demand steady flight and
advanced fliers who pursue full aerobatic capability.
R/C helicopters, including the 500heli are not toys, R/C helicopter utilize various
high-tech products and technologies to provide superior performance.
We recommend that you obtain the assistance of an experienced pilot before attempt-
ing to fly our products for the first time. A local expert is the best way to prop-
erly assemble, setup, and fly your model for the first time. The 500heli requires a
certain degree of skill to operate, and is a consumer item. Any damage or dissatis-
faction as a result of accidents of modifications are not covered by any warrantee
and cannot be returned for repair or replacement
Notice:
Fly only in safe areas, away from other people. Do not operate R/C aircraft within
the vicinity of homes or crowds of people. R/C aircraft is prone to accidents, fail-
ure, and crashes due to a variety of reasons including, Lack of maintenance, pilot
error, and radio interference. Pilots are responsible for their actions and damage
or injury occurring during the operation or as of result of R/C aircraft models.
UTION ITEMS
1.KEEP AWAY FROM BARRIER
R/C helicopters fly at high speed, thus posing a certain degree of potential. Choose
an appropriate flying site consisting of flat, smooth ground, a clear open field, or
a large open room, such as gymnasium or warehouse without obstacles. Do not fly near
buildings, high voltage cables, and careful to keep your face, eyes, hands, and
loose clothing away from the blades. Always fly the model a safe distance from your-
self and others, as well as surrounding objects. Never take your eyes off the model
or leave it unattended while it is turned on. Immediately turn off the model and
transmitter when you have landed the model.
2. ALWAYS BE AWARE OF THE ROTATING BLADES
During the operation of the helicopter, the main rotors will be spinning at a high
rate of speed. The blades are capable of inflicting serious bodily and damage to the
environment. Be conscious of your actions, one else is operating on the same fre-
quency for the safety.
3. OBTAIN THE ASSISTANCE OF AN EXPERIENCED PILOT
Before turning on your model and transmitter, check to make sure no one else is
operating on the same frequency. Frequency interference can cause your model, or
other models to crash. The guidance provided by an experienced pilot will be invalu-
able for the assembly, turning, trimming, and actual first flight. (Recommend you to
practice with computer-based flight simulator.

4.4. PREVENT PREVENT MOISMOISTTUURE RE
R/C models are composed of many precision electrical components. It is critical to
keep the model and associated equipment away from moisture and other contaminants.
The introduction or exposure to water or moisture in any form can cause the model to
malfunction resulting in loss of use, or a crash. Do not operate or expose to rain
or moisture.
5. KEEP AWAY FROM HEAT 5. KEEP AWAY FROM HEAT
R/C models are made up various forms of plastic. Plastic is very susceptible to
damage or deformation due to extreme heat and cold climate. Make sure not to store
the model near any source of heat such as an oven, or heater. It is best to store
the model indoors, in a climate-controlled, room temperature environment.
6.CAREFULLY I6.CAREFULLY INSPECT BEFORE REAL FLGNSPECT BEFORE REAL FLGHTHT
Before flying, please check to make sure to no or trees to ensure the safety of
yourself, others, and you model. Do not fly you model in inclement weather, such as
rain, wind, snow or darkness. Before fl, please check if the batteries of transmit-
ter and receiver are enough for the flight. Before turn on the transmitter, please
check if the throttle stick is in the lowest position. IDLE switch is OFF.When turn
off the transmitter, please follow the power on/off procedure. Power ON-Please turn
on the transmitter first, and then turn on receiver. Power OFF-Please turn off the
receiver first and turn off the transmitter. Improper procedure may cause out of
control, so please to have this correct habit.
Before operation, checking every movement is smooth and directions are correct.
Carefully inspect servos for interference and broken gear.
Check for missing or loose screws and nuts. See if there is any cracked and incom-
plete assembly of parts. Carefully check main rotor blades and rotor holders. Broken
and premature failures of parts possibly cause resulting in a dangerous situation.
Check all ball links to avoid excess play and replace as needed. Failure to do so
will result in poor flight stability.
Check the battery and power plug are fastened. Vibration and violent flight may
cause the plug loose and result out of control.Check for the tension of tail drive
belt.
Tools Required for assembly
Scissors
Lubricant knife Nipper Ball Link
Pliers screwdriver

2
Control lever main rotor housing set
Fly frame main rotor housing set -1 Fly frame main rotor housing set -2
Control lever arm set
Flybar control lever set
1
11
12
12
18
18
12
12
16
11
16
17
19
13
20 14
15
15
10
6
3
7
8
9
9
7
5
4
21
21
21
Installation steps of main rotor -1:
Make sure flybar
seesaw holder
moves smooth

Installation steps of main rotor -2:
WASHOUT CASE ARM SET-1
13 13
MAIN ROTOR HOUSING FLYBAR PADDLE SET
22
23
33
32
35 37
34
36
25
27
28 29
30
31
12
12
11
10
10
11
26
ROTOR PART SET -1:
ROTOR PART SET -2:
WASHOUT CASE ARM SET -2
MAIN PADDLE SET

SWASH PLATE SET
ROTOR PART SET：
MAIN GEAR SET：
38
39
10
10
42 43
11
11
41
40
24
37
13
21
45
44
21
47
48
49
46
Installation steps of main rotor -2:

INSTALLATION ILLUSTRATION OF UPPER AIRFRAME SET：
50
51
52
21
55
21
53
TAIL BOOM
STIFFENER SET
TAIL GEAR SET
68
67
56
60
59
58
63
66
64
62
65
61
8
8
62
MAIN SHAFT BEARING MOUNT

73
75
69
71
74 74
56
76
INSTALLATION OF MAIN ROTOR SET：
AIRFRAME AND LANDING SKID ILLUSTRATION：

3
INSTALLATION ILLUSTRATION OF TAIL GEAR HOLDER SET:
TAIL SLIDING PART SET
TAIL CONTROL LEVER
81
82
83
84
84
88
85
43
86 89
59
43
90
91
98
89
10
11
97
12
96
95
26
92
94
93
12

TAIL GEAR HOLDER TAIL BOOM SET
103
101
99 101
102
100
18
INSTALLATION ILLUSTRATION OF TAIL ROTOR:
TAIL PADDLE SET