Century 50nx Building Instructions

PAGE [2]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

Introduction

Congratulations on your purchase of Century Helicopter Product’s newest RC helicopter model. The Century 50NX is a new breed of
helicopter, ideal for beginners new to the hobby through to expert pilots. The Century 50NX can be setup for a multitude of flight styles

- from the beginner to intermediate pilot and on up to the most advanced 3D aerobatic flights. This kit will exceed your expectations for
precision control at an affordable price.

Warning

This radio controlled model is not a toy! It is a precision machine requiring proper assembly and setup to avoid accidents. It is the
responsibility of the owner to operate this product in a safe manner as it can inflict serious injury otherwise. It is recommended that if
you are in doubt of your abilities, seek assistance from experienced radio control modelers and associations. Keep loose items that can
get entangled in the rotor blades away for the main and tail blades, including loose clothing, hair, or other objects such as pencils and
screwdrivers. Especially keep your hands away from the rotor blades. As manufacturer, we assume no liability for the use of this product.

Pre-assembly Information

Upon opening the kit, all the major component parts are bagged for ease of assembly which correspond to the sections of the manual.
Various assemblies have been pre-assembled however, only as a reference assembly. Final assembly is up to the user. Installation onto
the particular parts, screws and nuts required for each step are packaged in the same bag as the parts. Be careful when opening each
bag as not to lose any hardware. Care has been taken in filling and packing of each bag however mistakes do happen. If there is a parts
shortage or missing hardware please contact us at:

General Guidelines

Apply thread lock to all metal to metal thread contact points. Do not apply CA (cyanoacrylate) glue or thread lock to ny-lock nuts (metal nuts
with plastic inserts). Diagrams indicated by bounding boxes for screws, bearings, etc. are illustrated at a 1-to-1 ratio. All other illustrations
are not drawn to scale. Throughout this manual, you will find building tips. Please follow the tips and use common sense when building.

Century Helicopter Products
1740-C Junction Ave.
San Jose, CA. 95112
www.centuryheli.com

BUILDING INSTRUCTIONS FOR THE 50NX

Century Helicopter Products warranties that the Products purchased (the “Product”) will be free from defects in materials and workman­ship 30 days from the date of purchase by the Purchaser.

Warranty Period

Required Items

(a) This warranty is limited to the original customer (“Purchaser”) and is not transferable. REPAIR OR REPLACEMENT AS PROVIDED
UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE PURCHASER. This warranty covers only those Products purchased
from an authorized Century Helicopter Products dealer. Third party transactions are not covered by this warranty. Proof of purchase is
required for warranty claims. Further, Century Helicopter Products reserves the right to change or modify this warranty without notice
and disclaims all other warranties, express or implied.
(b) Limitations- CENTURY HELICOPTER PRODUCT MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT NON­INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCT. THE PURCHASER ACKNOWLEDG­ES THAT THEY ALONE HAVE DETERMINED THAT THE PRODUCT WILL SUITABLY MEET THE REQUIREMENTS OF THE PURCHASER’S
INTENDED USE.
(c) Purchaser Remedy- Century Helicopter Products’s sole obligation hereunder shall be that Century Helicopter Products will, at its
option, (i) repair or (ii) replace, any Product determined by Century Helicopter Products to be defective. In the event of a defect, these
are the Purchaser’s exclusive remedies. Century Helicopter Products reserves the right to inspect any and all equipment involved in
a warranty claim. Repair or replacement decisions are at the sole discretion of Century Helicopter Products. This warranty does not
cover cosmetic damage or damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or modification of or to any
part of the Product. This warranty does not cover damage due to improper installation, operation, maintenance, or attempted repair by
anyone other than Century Helicopter Products. Return of any goods by Purchaser must be approved by Century Helicopter Products
before shipment.

Limited Warranty

Flight Guidelines

Please note this checklist is not intended to be a replacement for the content included in this instruction manual. Although it can
be used as a quick start guide, we strongly suggest reading through this manual completely before proceeding.

Always turn the transmitter on first

Allow the gyro, and receiver to arm and initialize properly

Do a pre-flight check making sure all electronics are working and look for any mechanical issues

Fly the model

Land the model

Turn off the engine

Always turn the transmitter off last

CN2050

PADDLE GAUGE

CN2034A

BALL LINK PLIERS

HOBBY KNIFE

RECEIVER BATTERY

SERVOS X 5

ZIP TIES

4-WAY WRENCH

GYRO

6 CHANNEL RECEIVER

(MINIMUM)

HOBBY SCISSORS

GLOW PLUG

IGNITOR

METRIC RULER OR

SIMILAR MEASURING

DEVICE

CN2017

HEX DRIVERS

1.5, 2.0, 2.5, 3.0 & 4.0

6 CHANNEL

CCPM TRANSMITTER

(MINIMUM)

NITRO HELICOPTER

FUEL

CN3038A

SILENT POWER

50 MUFFLER

CN266166C

ROTORTECH 610MM BLADES

50 SIZE NITRO

ENGINE

CN2027

G-FORCE PITCH GAUGE

CN2051

ACCURATECH BLADE BAL-

ANCER V.2

CN2255

CONTROL ROD

SETUP GAUGE

CN2057 & CN0426

STARTER

AND STARTER SHAFT

NEEDLE NOSE

PLIERS

SYNTHETIC

OIL/GREASE

1.000

PAGE [3]

1

3

7

2

6

4

编号

数量（PCS）

序号

1

2

3

4

5

6

2

2

2

2

2

2

7

8

CNBB0730

(M3球头螺丝芽长6.5MM)

(平衡杆固定片)

(轴承)

(平衡控制臂)

CNBB0840

(轴承)

HI3167B

HI3167G

HI3167E

8

9

5

CNM3X14BHCS

HI3167G

(伞头螺丝)

(铁套)

2

2

1

(主旋翼中心座)

HI3160D

9

CNM3X6BHCS

(伞头螺丝)

METAL ROTOR HEAD YOKE SET

BUTTON HEAD CAP SCREWS M3 x 6

3X7X3 BALL BEARING

SEESAW TIE BAR SET

SEESAW OFFSET PLATES

SPECIAL BALL M3 x 6

4X8X3 BALL BEARING

SEESAW TIE BAR SET

BUTTON HEAD CAP SCREWS M3 x 14

名称（英文-中文）

DESCRIPTION

HEAD ASSEMBLY

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

CNM3X14BHCS

CNBB0730

CNBB0840

HI3167E

HI3167E

CNM3X6BHCS

CA

BAG 1

In Bag 2, there is a small poly-bag of various extra/spare
screws and a bottle of medium strength thread lock. Use
this thread lock when indicated.

Take special care when pressing in these bearings. Do not
press in on the inner race of the bearing.

Do not secure all the screws until lining up
the components in the following steps.

PAGE [4]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

FLYBAR ASSEMBLY

1

2

3

4

5

6

7

9

8

编号 数量（PCS）

序号

1

2

3

4

5

6

2

2

2

2

2

2

7

(拉杆)

(球头连接头)

CNM4X5SS

(稳定翼控制臂)

(M3球头双牙螺丝)

(平衡杆控制臂)

(圆头螺丝)

CNM3X12BHCS

(无头内六角螺丝)

2

8

(平衡杆)

1

9

(平衡翼)

2

HI3176C

HI3176C

HI3176C

HW3173A

HI6179

HI6145

HW3192A

4MM FLYBAR

BALL LINK SET (26 LONG,4 SHORT)

M4X5 SOCKET HEAD SET SCREW

PUSHROD SET

SYMMETRICAL FLY BAR ARMS

SYMMETRICAL FLYBAR ARM

名称（英文-中文）

DESCRIPTION

SYMMETRICAL FLYBAR ARM

CNM3X12BHCS

CNM4X5SS

HI3167C

CA

Make sure the distance on

both sides are equal.

Flybar weights are provided for
optional stability. Use the supplied
M3x3 set screw to set in place
on the flybar. Set the weights as
far out towards the paddles for in­creased stability and closer to the
head block for increased response.

Make sure the distance on

both sides are equal.

Black = 30g

for stability

Yellow = 22g

for aerobatics

BAG 1, 6

10

CNLR1006

BUTTON HEAD CAP SCREWS M3 x 12

M4X6X0.5 WASHER

M4X6X0.5 WASHER

Be sure to attach these links prior
to securing screws.

10

4MM 30GRAM 3D NX FLYBAR PADDLES

PAGE [5]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

BLADE GRIP ASSEMBLY

Comes pre-assembled

Do not apply CA or
thread lock to locknut!

Do not overtighten
this locknut.

Notice orientation
of blade grips.

LARGER ID TOWARDS THE GRIP

SIDE PROFILE - BLADE GRIP

RECESSED CREVICE FACES MAIN SHAFT

THRUST BEARING INSTALLATION GUIDE

GROOVES INSIDE

编号

名称（英文-中文）

数量（PCS）

序号

1

2

3

4

5

6

7

8

9

10

11

12

13

14

2

(六角螺帽)

2

(止推轴承)

CNBB1260T

HW3180A

2

(平面垫片)

4

(轴承)

CNBB1360

2

(主旋翼夹片)

HI3184

2

HI3189A

(平面垫片)

(轴承)

CNBB0730

4

HI3189A

(铁套)

2

2

(球头螺丝)

CNLR1014

HI3189A

(主桨控制臂)

2

2

(有头内六角螺丝)

(球头螺丝)

CNLR1016A

2

HW3180A

1

HW3180A

2

(横轴)

(垫片)

6X12X4.5 THRUST BEARING

6x13x5 BALL BEARING

MAIN ROTOR BLADE GRIP SET

WASHER

STAINLESS BALL, 3mm THREAD, MEDIUM

6mm FEATHERING SHAFT

SPACER

3X7X3 BALL BEARING

SPACER

BELL MIXER ARM SET

M5 LOCK NUT

DESCRIPTION

CA

BAG 1

Step facing
blade grip for
Slower re­sponse

Step facing
Away from
Blade grip
For faster
response.

CNM3X14CS

CNM5LOCK

M3X14 SOCKET HEAD CAP SCREW

STAINLESS BALL, 3MM THREAD, SHORT

6x10 FLAT WASHER

CNBB0730

M3X14CS

M3X5

CNBB1360

CNBB1260T

M5

CNLR1016A

CNLR1014

平面垫片

M8X13

铁套

M3X5X3

HW3180A

HW3180A

HW3180A

HI3189A

HI3189A

HI3189A

15

HI3181

RUBBER DAMPENERS

2

1

2

4

5

6

12

9

3

14

15

13

8

7

10

11

PAGE [6]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

MOUNTING HEAD BLOCK AND TIMING YOKE

编号 名称（英文-中文） 数量（PCS）

序号

1

2

3

4

5

2

1

1

2

1

CNM3x18CS

CNM2.5x8CS

(有头内六角螺丝)

(剪型臂导拄)

(无头内六角螺丝)

(M3螺母)

CNM3x4SS

CNM3LOCK

M2.5X8 SOCKET HEAD CAP SCREW

DESCRIPTION

TIMING YOKE

M3 LOCK-NUT

(有头内六角螺丝)

M3X18 SOCKET HEAD CAP SCREW

M3X4 SOCKET HEAD SET SCREW

CNM2.5X8CS

CNM3X18CS

M3 LOCK NUT

CNM3X4SS

Do not apply CA or
thread lock to lock nut!

Do not over tighten!

Do not over tighten!

You may feel a light coat of anti-rust oil resi­due on the main shaft. If you do, clean this
with alcohol prior to installation.

BAG 1, 2

3

2

5

4

1

HI3160D

PAGE [7]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

WASHOUT ASSEMBLY

CNM3X16BHCS

M3X5X0.5

CNBB0730

CNLR1015

CNLR1016A

HI3152C

M3X5X3

HI6205

CNLR1014

HI3152C

编号

名称（英文-中文）

数量（PCS）

序号

1

2

3

4

5

(插销)

1

1

1

2

2

(铜套)

(控制臂固定座)

HI3152C

(三角控制臂)

6

7

8

9

10

11

12

13

14

(轴承)

(球头螺丝)

(铁套)

(圆头螺丝)

(十字盘)

(摆臂)

HI3152C

HI3152C

HI3152A

HI3152A

CNBB0730

HI3152C

CNM3X16BHCS

15

CNLR1016A

HI3146C

CNLR1016A

(铜套)

(平面垫片)

(球头螺丝)

(球头螺丝)

(球头螺丝)

4

2

2

2

2

2

2

1

3

2

CNLR1015

CNLR1014

HI3152C

WASHOUT SET

RADIUS LINK w/ PIN

STAINLESS BALL, 3mm THREAD, MEDIUM

3X5X3SPACER

METAL CCPM SWASHPLATE

WASHOUT SET

WASHOUT SET

RADIUS LINK w/ PIN

3X7X3 BALL BEARING

WASHOUT SET

BUTTON HEAD CAP SCREW

WASHOUT SET

STAINLESS BALL, 3mm THREAD, LONG

STAINLESS BALL, 3mm THREAD,

STAINLESS BALL, 3mm THREAD, LONG

DESCRIPTION

Comes pre-assembled

CA

HW6205

BAG 1

9

8

7

6

5

4

1

2

3

10

11

12

15

13

14

PAGE [8]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

CONTROL ROD ASSEMBLY

编号

名称（英文-中文）

数量（PCS）

序号

1

2

3

4

5

2

6

7

8

(球头连接杆)

(球头连接杆)

(球头连接杆)

(球头连接杆)

(连杆)

(连杆)

(连杆)

(连杆)

2

2

2

2

2

2

2

HW3192A

HW3192A

HW3192A

HW3192A

PUSHROD SET

PUSHROD SET

PUSHROD SET

PUSHROD SET

DESCRIPTION

NOTICE SIZE OF HOLES ON BALL LINKS

THE SIDE WITH THE SMALLER HOLE
SHOULD FACE OUTWARDS

PART# CN2255: CONTROL ROD SETUP GAUGE

PART# CN2219A: BALL LINK
EASY DRIVER

HELPFUL TOOL:

HELPFUL TOOL:

HI6145

HI6145

HI6145

HI6145

BAG 1, 5

1

2

A

8

7

6

5

B

D

4

3

C

A

B

C

D

26

48

52

100

This setup will get you approximately +/- 12 degrees of pitch

BALL LINKS (26 LONG, 4 SHORT)

BALL LINKS (26 LONG, 4 SHORT)

BALL LINKS (26 LONG, 4 SHORT)

BALL LINKS (26 LONG, 4 SHORT)

PAGE [9]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

COUNTER GEAR ASSEMBLY

CNM4X4SS

CNBB1350

CNM3X10FHCS

M5X7X2

CN2224

1

2

3

4

5

6

7

8

9

10

4

4

编号

数量 （PCS）

序号

1

2

3

4

5

6

(齿轮)

(铜环间隔套)

(轴承)

1

1

4

3

4

1

CNM4X4SS

7

9

10

8

(传动轴)

(齿轮)

(单向轴承)

(

斜头螺丝)

(轴承盖)

(轴承座)

1

1

1

1

CNBB1350

CN2263K

CN2263K

CN2263K

CN2263F

CN2263D

CNM5X7X2BS

5x13x4 BALL BEARING

AUTO HUB ASSEMBLY (8mm)

M4X4 SOCKET HEAD SET SCREW

M5x7x2 BRASS SPACER

AUTO HUB ASSEMBLY (8mm)

AUTO HUB ASSEMBLY (8mm)

CONSTANT DRIVE SHAFT 50 SIZE - 8MM (8mm)

名称（英文-中文）

DESCRIPTION

BAG 2

M3X8 FLUSH HEAD CAP SCREWSCNM3X8FHCS

HW3045B

METAL DRIVE GEAR 14T NX

GRAY COUNTER GEAR 8.67:1 53T (8mm)

PAGE [10]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

MAIN GEAR ASSEMBLY

CNM3X16CS

CNBB1019

CNBB1980

M3

CNM4X4SS

编号

数量（PCS）

序号

1

2

3

4

5

6

(主轴)

(塑胶垫圈)

(间隔套)

1

1

1

1

1

1

CNBB1019

HW3053A

7

9

10

8

(伞齿轮)

(八角铝拄)

(有头内六角螺丝)

(轴承)

(螺帽)

1

3

1

1

(轴承)

(铜套)

(外扣环)

1

1

HW3054A

CNM3X16CS

CNBB1980

CNM3LOCK

CNM4X4SS

(无头内六角螺丝)

11

12

10mm MAIN SHAFT

14X19 WASHER

10x19x5 BEARING

MAST STOPPER

M3x16 SOCKET HEAD CAP SCREWS

8x19x6 MAIN SHAFT BALL BEARING

M3 LOCK-NUT

MAIN GEAR

CIR CLIP

M4X4 SOCKET HEAD SET SCREW

名称（英文-中文）

DESCRIPTION

1

2

3

4

5

6

11

10

9

8

7

12

BAG 2

From Step: Mounting Head
Block & Timing Yoke (Page 6).
This is attached to the head
block.

You will find another main
gear and counter gear pinion
included with your kit. This set
is for extreme 3D.

Do not thread lock this in
place yet. Do so after you’ve
installed this section into the
frame on the following step.

Preassembled

HI3107A

HI3056A

CN2263L BRASS RING

CN2263A

CN2263A

MAIN GEAR HUB

PAGE [11]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

INSTALLATION OF MAIN & COUNTER GEAR

1

2

编号

名称（英文-中文）

数量（PCS）

序号

1

2
3

1
1

(第一轴传动组合)

1

(右塑料侧板)

(主轴传动组合)

UPPER SIDE FRAMES

COUNTER GEAR ASSEMBLY

MAIN GEAR ASSEMBLY

3

DESCRIPTION

HI3108

BAG 2, 3

PAGE [12]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

ASSEMBLY & INSTALLING TORQUE DRIVE

CNM4X4SS

CNM3X4SS

CNBB1350

1

2

4

5

3

6

7

编号

名称（英文-中文）

数量（PCS）

序号

1

2

3

4

5

6

1

3

1

1

2

1

7

(传动轴)

(无头内六角螺丝)

CNM3X4SS

(传动轴接头)

(间隔套)

(轴承)

(伞齿轮)

(无头内六角螺丝)

2

CNBB1350

HW3057

CNM4X4SS

HI3154

TAIL DRIVE PRIMARY SHAFT with SPACER (TORQUE)

5x13x4 BALL BEARING

TAIL TRANSMISSION BEVEL GEAR

M4X4 SOCKET HEAD SET SCREW

TAIL DRIVE PRIMARY SHAFT with SPACER (TORQUE)

M3X4 SOCKET HEAD SET SCREW

DESCRIPTION

BAG 2

TORQUE TUBE DRIVE COUPLER

HW3059A

HW3059A

PAGE [13]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

INSTALLING FRAME REINFORCEMENTS

编号 名称（英文-中文） 数量（PCS）

序号

1

2

2

2

(六角铝柱)

HW3127

UPPER BEARING REINFORCEMENT BARS

HEX SPACERS

DESCRIPTION

1

2

BAG 2

HW3127C

PAGE [14]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

BUILDING ELEVATOR FRAME

编号

数量（PCS）

序号

1

(固定板)

1

(螺丝护套)

4

(有头内六角螺丝)

2

(有头内六角螺丝)

2

(螺母)

2

2

3

4

5

CNM3X10CS

CNLM3LOCK

ELEVATOR FRAME

MACHINED WASHER

M3 LOCK-NUT

名称（英文-中文）

DESCRIPTION

M3x10 SOCKET HEAD CAP SCREWS

1

2

3

4

5

HI3109

CN2218S

BAG 2, 4

CNM3X10CS

CNM3X8CS

M3 CNM3LOCK

Assembly of left frame section
is exactly the same

M3X8 SOCKET HEAD CAP SCREWCNM3X8CS

PAGE [15]

COPYRIGHT (C) CENTURY HELICOPTER PRODUCTS - ALL RIGHTS RESERVED

INSTALLING ELEVATOR AND AILERON BELL CRANKS

1

2

3

4

5

5

13

14

10

11

12

15

10

2

(有头内六角螺丝)

(十字盘固定座)

(有头内六角螺丝)

(有头内六角螺丝)

(有头内六角螺丝)

(螺丝护套)

CNM3X10CS

CNM3X8CS

CNM3X25CS

CNM3X8CS

11

12
13

14

1

2
2
2

4

M3x10 SOCKET HEAD CAP SCREWS

ANTI-ROTATION BRACKET

M3x8 SOCKET HEAD CAP SCREWS

M3x25 SOCKET HEAD CAP SCREWS

M3x8 SOCKET HEAD CAP SCREWS

MACHINED WASHER

编号

名称（英文-中文）

数量（PCS）

序号

1

(铝座)

2

(轴承)

4

(控制臂)

3

(铁套)

2

(M3球头螺丝)

6

2
3
4
5
6
7
8

CNBB0730

(轴承)

1
2

CNLR1014

BEVELED BELL-CRANK SPACER

BELL-CRANK

3x7x3 BALL BEARING

(铁套)

(铁套)

9

STAINLESS BALL, 3mm THREAD, SHORT

MALE THREADED SPACER

4x7x2.5 BALL BEARING

FEMALE THREADED SPACER

1

CNM3X25CS

CNM3X10CS

CNM3X8CS

CNM3X18CS

CNBB0730

CNLR1014

HI3032C

CNLR1013

3X5X7

HI3031D

HI3031C

HI3031E

HI3031E

CNBB47

HW3118

CN2218S

BAG 2, 3, 4

When installing, make
sure swashplate guide
goes through.

HW6205

3x5x3

M3x5x3 SPACER

Comes pre-assembled.

5

5

5

6

7

3

DESCRIPTION