OMPHOBBY M4 MAX User manual

Thank you for choosing OMPHOBBY products.The M4 MAX is the latest
technology in rotary wing RC models, designed in Germany by Jonas
Wackershauser. Please read this assembly manual carefully before
assembling and flying your new M4 Max helicopter. We recommend that
you keep this manual for future reference.
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INSTRUCTION MANUAL
revision 0

遥控模型飞机、直升机属于高危险性商品，飞行时务必远离人群，人为组装不当或机件损坏，电子控制设备不良，以及操控上的不熟悉、都有可能导致
飞行失控损伤等不可预期的意外，请飞行者务必注意飞行安全，并需了解自负疏忽所造成的任何意外之责任。
Fly only in safe areas, at a safe distance from other people. Do not operate R/C aircraft within the vicinity of homes or crowds of people. R/C aircraft may
suffer accidents, failures,and crashes due to a variety of reasons including, but not limited to: Lack of maintenance, pilot error and radio interference. Pilots
are responsible for their actions, as well as damage or injury occurring during the operation of their R/C aircraft models .
SAFETY NOTES 安全注意事项
模型商品属于需高操作技术且为消耗性之商品，如经拆装使用后，会造成不等情况零件损耗，任何使用情况所造成的商品不良或不满意，将无发于
保固条件内更换新品或者退货，如遇有使用操作维修问题，本公司全球分公司或者代理商将提供技术指导，特价零件供应服务。
M4 Max 遥控直升机并非玩具，它是结合了许多高科技产品所设计出来的休闲用品，所以商品的使用不当或者不熟悉都可能会造成严重伤害甚至死
亡，使用之前请务必详细阅读本说明书，勿轻忽并注意自身安全。
注意！任何遥控直升机的使用，制造商和经销商是无法对使用者于零件使用的损耗异常或组装不当所发生之意外负责任何责任，本产品是提供给
有操作过模型直升机经验的成人或者有相当技术的人员在旁指导于当地合法遥控飞行场飞行，以确保安全无误下操作使用，产品售出后该公司将
不负责任何操作和使用控制上的任何性能与安全责任。
RC Helicopters require skill to operate. We recommend that inexperienced pilots obtain the assistance of an experienced pilot before attempting to fly
our products for the first time. Local expert assistance is the best way to assure proper assembly, setup, and safe flight of your model.
Any damage or dissatisfaction as a result of crashes, incorrect setup, modifications or lack of necessary user skill are not covered by any warranty
and cannot be returned for repair or replacement.
Please contact our distributors for technical support and parts supply if you experience problems.
R/C helicopters, including the OMPHOBBY M4 MAX , are not toys. R/C helicopters utilize various high-tech components and technologies to provide
superior flight performance. lmproper use of this product can result in damage to property, serious injury or even death. Please read this manual carefully
before using and make sure to be conscious of your own personal safety, the safety of others and your environment when operating OMPHOBBY products.
Manufacturer and seller assume no liability for the operation or the use of this product. The OMPHOBBY M4 MAX is intended for use only by adults with
experience flying remote control helicopters at a legal flying field. After the sale of this product, OMPHOBBY cannot maintain any control over its operation
or usage.
IMPORTANT NOTES 重要声明
Do not attempt under any circumstances
在任何禁止的环境下，请勿尝试操作。
Mishandling due to failure to follow these instructions may result in danger.
因为疏忽这些操作说明，而使用错误可能造成危险。
因为疏忽这些操作说明，而使用错误可能造成财产损失或严重伤害。
Mishandling of the helicopter and failure to follow these instructions may result in damage, injury or death.
WARNING LABEL LEGEND 标志代表含义
感谢您选购边锋智驱公司产品，为了你容易方便使用M4 Max直升机，请您详细的阅读完这本说明书之后再进行组装以及操作这台直升机，同时请
您妥善保存这本说明书，作为日后进行调整以及维修的参考。
Th e M4 MAX is a ne w product developed by OMPHOBBY. lt features the best design available on the Mi ni -Heli market to date, providing high flight
stability for beginners, full aerobatic capability with virtually unlimited control power for advanced pilots, as well as unsurpassed reliability for all customers.
Thank you for choosing OMPHOBBY p roducts. The M4 MAX Helicopter is designed as an easy to use, full y featured Helicopter R/C model capable of
all styles of rotary flight. Please read this manual carefully before operating the model and follow all precautions, limitations and recommendations in
the manual. Be sure to retain the man u al for future reference, routine maintenance, and tuning.
INTRODUCTION 前言
WARNING
警告
!
!注意
CAUTION
禁止
FORBIDDEN
!注意
CAUTION
M4 Max是边锋智驱有限公司自行研发的新产品，不论您是需求飞行稳定的初学者还是追求性能卓越的飞行爱好者。M4 Max将是您最佳的选择。
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Beer
请于自己能力内及需要一定技术范围内操作这台直升机，过于疲劳，精神不佳或不当操作，意外发生风险将可能会提高。
Operate this helicopter within your ability. Do not fly under the influence of perception-altering substances, as well as when you’re sleep deprived. It
may result in danger or injury.
ALWAYS BE AWARE OF THE ROTATING BLADES 远离运转中的零件
SAFE OPERATION 安全操作
R/C models are made of various forms of plastics. Plastic is very susceptible to damage or deformation due to extreme heat and cold. Make sure not to
store the model near any source of heat, such as direct, strong sunlight or a heater. It is best to store the model indoors, in a climate-controlled,
room-temperature environment.
KEEP AWAY FROM HEAT 远离热源
遥控飞机多半是以 纤维或聚乙烯、电子商品为主要材质，因此要尽量远离热源、日照、以避免因高温而变形甚至熔毁损坏的可能。
当直升机主旋翼与尾旋翼运转时，切勿触摸并远离任何物件，以避免造成危险及损坏。
During the operation of the helicopter, the main rotor and tail rotor will be spinning at very high rotation speeds. Rotor blades are capable of
inflicting serious to lethal bodily injury and damage to the environment. Be conscious of the hazards posed by the spinning rotor blades and
maintain safe distance from the helicopter at all times.
Always fly the model a safe distance from yourself and others,as well as your surroundings. Never take your eyes off the model or leave it
unattended while it is turned on. Immediately turn off the model and transmitter and remove battery after you have landed the model.
避免独自操控
至飞行场地前，需确认是否有相同频率的同好正在飞行，因为开启相同的频率的发射机将导致自己与他人立即干扰等意外危险。
For inexperienced pilots, the guidance provided by an experienced pilot can be invaluable for the assembly, setup, tuning, trimming and first
flight. (It is recommend to practice with computer-based flight simulator beforehand.)
Before turning on your model and transmitter, check with other RC model users in the area that it is safe to fly .
OBTAIN THE ASSISTANCE OF AN EXPERIENCED PILOT
遥控飞机操控技巧在学习初期有着一定的难度，要尽量避免独自操作飞行，需有经验的人士在旁指导，才可以操控飞行。 勤练电脑模拟器及
老手指导是入门必要的选择
请确认于产品限界内操作，请勿过载使用，并勿用于安全、法令外其他非法用途。
MALOPERATION 勿不当使用本产品
Please use only genuine replacement parts listed in the manual to ensure correct operation. Use of non-standard or damaged parts voids the
product warranty and may cause danger. This product is designed for leisure R/C modelling, do not use the model for other purposes .
请勿自行改造加工，任何的升级改装或维修，请使用三源电子科技产品目录中的零件，以确保结构的安全。
直升机内部也是由精密的电子零件组成，所以必须绝对的防止潮湿或水气 避免在浴室或雨天时使用，防止水气进入机身内部而导致机件及电
子零件故障而引发不可预期的意外！
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 control or a crash. Do not operate or expose the model to rain or moisture.
R/C models are composed of many precision mechanical and electrical components.
PREVENT MOISTURE 远离潮湿环境
For the first flights, please choose a legal flying field with ample clear space. Flying over long grass reduces damage in the event of a crash.
Consider the use of a training landing gear. Do not fly your model in inclement weather, such as rain, wind, snow or darkness.
R/C helicopters can fly at high speed and have rotor blades spinning at high RPM, thus posing a certain degree of potential danger during
operation. Choose a legal and safe flying field consisting of flat, smooth ground without obstacles, other people, animals etc.
初次练习时，务必选择在空旷合法专属飞行场地并适当搭配练习架飞行，这对于飞行失误所造成的损伤将会大幅的降低。请勿在下雨天、打雷
等恶劣天气下操作，以确保本身及机体的安全。
必须注意周边有没有人、高楼、建筑物、高压电线、树木等等、避免操控的不当造成自己或与他人的财产损坏。
LOCATE AN APPROPRIATE LOCATION 远离障碍物及人群
To ensure the safety of yourself, others and your model, do not fly near airports, buildings, roads, crowded areas or high voltage cables.
直升机飞行时具有一定的速度，相对的也潜在着危险性，场地的选择也相对的重要，请遵守当地的法律法规到合法的遥控飞行场地去飞行。
禁止
FORBIDDEN
禁止
FORBIDDEN
禁止
FORBIDDEN
WARNING
警告
!
WARNING
警告
!
!注意
CAUTION
!注意
CAUTION
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Precautions before use 使用前须知

六角螺丝起子
十字螺丝起子
When you see the marks as below, please use glue or grease to ensure flying safety.
剪刀 Scissors
刀子 Cutter Knife
斜口钳 Diagonal Cutting Pliers
尖嘴钳 Needle Nose Pliers
CA Glue 瞬间胶
Hex Driver (1.5 & 2 & 2.5mm)
Self-provided tools 自备工具
胶水使用方法
标有以下符号之组装步骤，请配合上胶或上油，以确保使用之可靠度。
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2
Grease
Repeat Multiple Times
Apply Threadlocker Apply Petroleum-Based,
Light Viscosity Lube
Loosely Tighten
Apply NO Threadlock Apply Synthetic
Grease
Fully Tighten
Apply MEDIUM CA
使用螺丝胶
添加润滑油
普通拧紧
使用瞬间胶固定 重复多次
无需使用螺丝胶
添加润滑油脂
完全拧紧
A
B
Use AB glue
使用 AB 胶
Threadlocker 螺纹胶
Viscous grease 润滑油
A B
AB glue AB 胶
Philips Screw Driver

Length ：830mm
Specifications 参数配备
Height ：226mm
Main Blade ：420mm
Main Rotor Diameter ：945mm
Tail Rotor Diameter ：190mm
Flying Weight ：1500g
Features 设计特点
Large pitch range main rotor design for extreme control power in any situation
Highly compact flight mechanics design
Lightweight carbon fiber and aluminium airframe design
Streamlined low wind resistance canopy design
Frame mounted XT60 connector for easy battery connection
Open frame design for easy wiring and serviceability
机身长： 830mm
机身高： 226mm
主旋翼长度： 420mm
主旋翼直径： 945mm
尾旋翼直径： 190mm
起飞重量约： 1500g
大螺距主旋翼设计，实现极限控制
高度紧凑的飞行力学设计
碳纤维和铝机身轻量化设计
流线型低风阻机头罩设计
XT60 连接器框架安装，便于电池连接
开放式框架设计，便于接线和维护
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Specifications 参数规格
830
226
945
128

1-1 Cyclic Servo Assembly
Servo Swashplate (×3)
Servo Arm (×3)
Socket cap screw
M2x4mm ( ×3)
Ball Joint Screw - L4.65 (×3)
M2 Nylon locknut (×3)
Servo Arm (×3)
Socket cap screw
M2x4mm ( ×3) Ball Joint Screw - L4.65 (×3)
M2 Nylon locknut (×3)
Socket cap screw
M2x4mm ( ×6)
M4X-101
M4X-102
Servo Rack ( ×1)
Servo Rack ( ×1)
Socket cap screw
M2x4mm ( ×6)
1-2 Servo Rack Assembly
1-3 Tail servo (Micro servo ) assembly
※ The ball joint screw should be screwed
into the outer hole of the servo arm.
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Installation steps 安装步骤
Bearing ∅ 8x ∅14x4mm (×2)
Bearing ∅8x ∅14x4mm ( ×2) ※ Note: All servo wires shou ld exit the servo rack
in one position , which should be aligned with the
rear of the frame .
Partially pre-assembled parts are loosely screwed together without thread locker/glue
Recommendation: Loctite 243 for screws, Loctite 648 for bearing seats.
※ Note: In a crash, the servo arm spline can strip.
※ The servo wires can be wrapped around the
core of the servo rack to shorten them neatly.
16mm
115°
M2 Nylon locknut (×1)
Tail servo (×1)
Tail servo mount set (×2)
Servo Arm (×1)
Socket cap screw
M2x4mm ( ×2)
Socket cap screw
M2x4mm ( ×1)
Ball Joint Screw - L4.65 (×1)
!注意
CAUTION
The maximum height of the tail servo, including servo
arm, must be less than 40. 0mm. When the tail servo
arm is in the middle position, the angle relative to the
tail servo should be 115°, as shown above.
※ The M4 Max can be equipped with the
DS2312T micro servo, and the ball head screw
should be installed in the outer hole of the servo
arm. The manual will provide an illustrative
installation diagram for the mini servo, and the
installation method for the micro servo is the
same as that for the mini servo.
12.5mm

M2 Nylon locknut (×1) Socket cap screw
M2x4mm ( ×2) Ball Joint Screw - L4.65 (×1) Tail servo mount set (×2)
2-1 Main frame tail servo assembly
M2 Nylon locknut (×1)
X Tail servo (×1)
Tail servo mount set (×2) Socket cap screw
M2x4mm ( ×2)
Ball Joint Screw - L4.65 (×1)
Socket cap screw
M2.5x5mm ( ×2)
X Main Frame (left) (× 1 )
M4-201
!注意
CAUTION
※ The maximum height of the tail servo, including
servo arm, must be less than 40. 0mm. When the tail
servo arm is in the middle position, the angle relative
to the tail servo should be 115 °, as shown above.
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X Main Frame (right) (× 1 )
Installation steps 安装步骤
X Main Frame
(left) (× 1 )
Socket cap screw
M2.5x5mm ( ×2)
X Main Frame
(right) (× 1 )
85A ESC (×1) Strap (×2)
M4-202
Battery mounting
rail (× 1 )
2-2 Main frame set assembly
Strap (×2)
Countersunk head
hexagon socket screw
M2 .5 x6mm ( ×2)
Battery mounting rail (× 1 )
Countersunk head
hexagon socket screw
M2 .5 x6mm ( ×2)
※ The ball head screw should be installed in the outer hole of the servo arm.
Socket cap screw
M2.5x5mm ( ×1)
Countersunk head
hexagon socket screw
M3x6mm ( ×1)
18mm
Mid servo metal
arm ( ×1)
M4X-103
Mid servo metal arm ( ×1) Socket cap screw
M2.5x5mm ( ×1)
Countersunk head
hexagon socket screw
M3x6mm ( ×1)
85A ESC (×1)
1-3 Tail servo (Mini servo ) assembly
115°
Installing the ESC, the 3M adhesive
should be adhered to the end half
of the ESC and bonded with the
bottom surface of the rail at this
point.

2-2 Main frame set assembly
X Brace (×1)
Socket cap screw
M 2.5 x 5 mm (× 16 )
X Tail Boom
Mount ( ×1)
X Square Frame
Brace ( ×1)
X-Brace (×1)
Socket cap screw
M 2.5 x5 mm (× 16 )
2-3 Motor assembly
Main Pulley ( ×1)
Main Rotor
Shaft ( ×1)
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Main Rotor Shaft ( ×1)
Main Pulley ( ×1)
countersunk head hexagon socket
screw M2x3mm ( ×12)
Main Pulley Flanges ( ×2)
Socket cap screw M2.5x15mm ( ×1)
Nyloc Nut M2.5 (×1)
Shim ∅8x ∅10x0.2mm ( ×1)
Socket cap screw
M 2.5 x8 mm (× 2 )
※ Do not tighten the M2.5x8mm clamping screws on the tail boom mounts .
※ The clamping screws should be inserted from right side to prevent interference with the tail
rotor linkage.
Socket cap screw
M 2.5 x 8 mm (× 2 )
Installation steps 安装步骤
Socket cap screw
M3x16mm ( ×2)
Bearing ∅ 3x ∅6x2.5mm (×4)
X Idler Pulley ( ×2)
X Bushing ∅3x ∅4x2 (×2)
X Idler Cone ( ×2)
Square Brace (×1)
Square Frame Brace Assembly
Shim
∅2.5x ∅5x0.5mm ( ×2)
Canopy frame
support rubber ( ×2)
Step socket cap screw
M2.5x6mm (× 2 )
Step socket cap screw
M2.5x6mm (× 2 )
Canopy frame support
rubber ( ×2)
Shim
∅2.5x ∅5x0.5mm ( ×2)
※ Note that the main
pulley flange carbon
plates are recessed one
side to suit countersunk
screws.
Shim ∅ 3.05x ∅4.5x0.5mm ( ×2)
(Already installed with retaining compound)
(Already installed with retaining compound)
X Square Frame Brace ( ×1)
X Tail Boom Mount convex ( ×1)
M4X-202
M4X-202
X-fixed seat gasket
(×1)
X Tail Boom Mount ( ×1) X-fixed seat gasket ( ×1)
X Tail Boom
Mount convex
(×1)
SUNNYSKY
8110 Motor ( ×1)
M4X-203
SUNNYSKY 8110 Motor ( ×1)
3mm 7.5mm
Shim
∅8x ∅10x0.2mm
(×1)

2-4 Motor and servo assembly
Main Plate (×1)
M4X-204
Socket cap screw
M3x14mm ( ×3)
Socket cap screw
M2.5x10mm ( ×4)
Socket cap screw
M2.5x5mm ( ×4)
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The se four screw holes are
reserved for installation of the the
motor roll bars in a later step .
Socket cap screw
M2.5x5mm ( ×4)
Socket cap screw
M2.5x10mm ( ×4)
Socket cap screw
M3x14mm ( ×3)
X Main Plate (×1)
Installation steps 安装步骤
※ Motor wires should exit
towards the front

2-5 Landing gear and flight controller
mount assembly
Swashplate Guidance
Mount ( ×1)
Flight Control Mounting
Plate (×1)
Swashplate Guidance
Plate (×1)
Countersunk head
hexagon socket screw
M2.5x5mm ( ×6)
Canopy Mounting
Post (× 2 )
Socket cap screw
M2.5x8mm ( ×4)
Socket cap screw
M2.5x10mm ( ×2)
Socket cap screw
M2.5x12mm ( ×2)
Landing Skid
Mount set ( ×2)
Canopy support
brace ( ×1)
Put note that heat shrink is preinstalled
X Landing gear ( ×1)
※ Attach the landing skid
mount to the side frame
before installing the landing
gear.
Countersunk head
hexagon socket screw
M2.5x5mm ( ×2)
Receiver Mounting
Plate (×1)
Socket cap screw
M2.5x5mm ( ×8)
M4X-205
M4X-205
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Installation steps 安装步骤
X Landing gear ( ×1)
Receiver Mounting Plate (×1)
Landing Skid
Mount set ( ×2)
Canopy support ( ×1)
Socket cap screw
M2.5x10mm ( ×2)
Socket cap screw
M2.5x5mm ( ×8)
Socket cap screw
M2.5x12mm ( ×2)
Swashplate Guidance Plate (×1)
Flight Control Mounting Plate (×1) countersunk head
hexagon socket screw
M2.5x5mm ( ×8)
Swashplate Guidance Mount ( ×1)
Canopy Mounting Post (× 2 )
Socket cap screw
M2.5x8mm ( ×4)
Shim
∅2.6x ∅5x1mm ( ×2)
Shim
∅2.6x ∅5x1mm ( ×2)

Tail Slider Sleeve ( ×1)
Bearing
∅6x ∅10x3mm (×2)
Tail Slider Ring ( ×1)
Tail Slider Bridge (×1)
4.5mm Tail Slider
Joint ( ×2)
Shim
∅6x ∅7x1mm ( ×1)
Socket cap screw
M2x6mm ( ×2)
Tail Slider Joint
Bushing ( ×2) ※ Note that the raised
face of the tail slider yoke
must face the bearing.
※ The tail slider comes pre-assembled
with thread locker from the factory, there
is no need to disassemble it again.
X Tail bellcrank Arm ( ×1)
Tail Bellcrank Base ( ×1)
Ball Joint Screw - L3 (×1) Socket cap screw
M2x4mm ( ×2)
Tail Bellcrank Base ( ×1)
X Tail bellcrank Arm ( ×1)
Tail Bellcrank ( ×1)
Socket cap screw
M2x4mm ( ×2)
Socket cap screw
M2x6mm ( ×2)
Ball Joint Screw - L3 (×1)
Flanged Bearing
∅2x ∅6x3mm ( ×2)
Apply thread-lock into threaded holes
to avoid contamination of bearing.
(Already installed with retaining compound)
(Already installed with retaining compound)
(Already installed with retaining compound)
Tail Slider Ring Set (×1)
3-1 Tail Thrust Component Installation
Socket cap screw
M2x6mm ( ×2)
X Tail boom (×1)
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M4X-301
Installation steps 安装步骤
Tail Bellcrank ( ×1)
Flanged Bearing
∅2x ∅6x3mm ( ×2)

Tail Slider Ring Set (×1)
X Tail Fin (×1)
X Tail boom (×1)
X Tail Rotor Shaft ( ×1)
Flanged Bearing
∅5x ∅13x4mm (×2)
Tail Belt 1280mm ( ×1)
X Tail Pulley Set ( ×1)
3-1 Installation of Tail Gearbox and
Tail Thrust set
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Installation steps 安装步骤
Socket cap screw
M2.5x5mm ( ×6)
X tail boom long
washer ( ×1)
X tail pipe short
washer ( ×1)
※ Thread the timing belt and the Tail Case
through the end, aligning the four threaded holes
with the tail boom.
※ The tail shaft passes through the
tail pulley, then insert the blade screw
to secure it
X Carbon Tube Liner (×1)
Shim
∅2.6x ∅5x0.7mm ( ×1)
※ Apply glue to the X Carbon Tube
Liner, align it with the slot, and insert
the X Carbon Tube Liner into the tail
boom
（Assembled and glued at the factory ）
Screw M2x10.5mm ( ×1)
Tail Case (×1)

X Tail Control Rod Guide ( ×2)
Bearing
∅3x ∅6x2.5mm (×4)
Ball Joint Screw - L3 (×2)
X Tail Rotor Blade
Grip ( ×2)
Thrust Bearing
∅3x ∅6x2.8 (×2)
3-2 Tail blade Set installation
Inner Dia. : Large
Inner Dia. : Small
Grease
(Already installed with retaining compound)
(Items are shipped pre-lubricated)
X Tail Fin (×1)X Tail Boom Mounting Brace (×1)
M4X-301
X Tail Pulley Set ( ×1) X Tail Rotor Shaft ( ×1)
Screw M2x10.5mm ( ×1)
Flanged Bearing
∅5x ∅13x4mm (×2)
Tail Belt 1280mm ( ×1)
Shim
∅3x ∅4.5x0.2mm ( ×2)
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Installation steps 安装步骤
Socket cap screw
M2.5x5mm ( ×6)
X Tail Control Rod Guide ( ×2)
about 140mm about 180mm
X tail pipe short washer ( ×1)
X tail boom long washer ( ×1) X Carbon Tube Liner (×1)
Shim
∅2.6x ∅5x0.7mm ( ×1)

3-2 Tail rotor assembly
Tail Blade Grip Set (×1) Tail Bellcrank Pin ( ×2)
Tail Blade Grip
Set (×1)
Tail Bellcrank Pin ( ×2)
Shim
∅2x ∅4.5x0.2mm ( ×2)
Socket cap screw
M2x6mm (× 2)
※ Note: The round screw head
seat must face outward
Tail Rotor Hub
(×1)
Tail Rubber
Damper
Shore ( ×2)
Tail Damper
Shim ( ×2)
※ The stepped side of the shim faces
outwards toward the blade grip.
Tail Rubber Damper Shore
Φ3xΦ6x3mm ( ×2)
Tail Damper Shim
Φ3xΦ5.5x0.6mm ( ×2)
M4X-302
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Installation steps 安装步骤

3-3 Tail boom, tail servo linkage rod assembly
※ Pay close attention to the twist direction of
the belt. The belt should be pulled straight
through the boom. Rotate the free end 90° as
shown to achieve proper tail rotor rotation. Do
not twist the belt further than 90° .
The tail boom can be pushed further
inward to give the belt more slack for
installing it onto the main pulley.
X Tail servo linkage rod (×1) 4.5 linkage ball set (M2.5 ) (×2)
X Control Rod Joint (×2)
※ After the tail belt is tensioned, tighten the
two clamping screws left loose in step 2-2 to
secure the boom in place .
※ The control rod ends should be sand and glued onto the carbon rod with AB glue/Epoxy, avoid
using Superglue/CA. Pay attention to the correct rod length.
※ Use sand paper on the rod ends to roughen them and make insertion into the joint easier.
Pull the tail boom backwards to tension the belt, to ensure that the flying power is effectively
transmitted to the tail. Do not over-tighten the belt to avoid excessive drag, but do not
over-loosen it, as too much looseness will cause the belt to jump, vibrate, and wear out.
After installation the rotary drive runs smoothly and the tensioner pulley rotates normally
with the timing belt
Different types of servos require different linkage rod lengths, with micro servos
needing approximately 584mm, and mini servos requiring about 589mm
M4X-303
4.5 linkage ball set
(M2.5 ) (×2)
X Tail servo linkage
rod (×1)
X Control Rod Joint (×2)
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Installation steps 安装步骤
A
B
Socket cap screw
M 1.6 x 3 mm (× 2)
Lock the M2x6 screws to the tail rod limiters
after attach the X tail servo linkage
Socket cap screw
M1.6x3mm ( ×2)
Self-tapping screws
M2x6mm ( ×2)
※ Here to put on some grease onto the
rubber ring for easier installation.

4-1 Swashplate assembly
约38mm
4.5mm linkage Ball
Joint Set ( ×6)
Servo linkage ( ×3)
Main shaft clamping
ring ( ×1)
Socket cap screw
M2.5x8mm ( ×1)
※ Make three linkages of the same length, note that
turnbuckles feature one right hand and one left hand thread
each. The tapered side of the turnbuckle faces down. The ball
joint’s flat spot with OMP logo faces outward when connecting
the linkages with the ball screws. The turnbuckles can be
adjusted in length without removing them from the helicopter.
Socket cap screw
M2.5x6mm ( ×4)
Swashplate (×1)
Motor roll bar ( ×2)
Main shaft spacing ring ( ×1)
Servo linkage ( ×3)
4.5mm linkage Ball Joint Set ( ×6)
Swashplate (×1)
Motor roll bar ( ×2)
Socket cap screw
M2x4mm ( ×7)
Ball Joint Screw - L3 (×6)
Guidance Ball
Screw (×1)
Swashplate Bearing
Retainer ( ×1)
Swashplate Hub ( ×1)
Bearing
∅20x ∅27x4mm (×1)
Swashplate Outer
Ring ( ×1)
Swashplate Connector ( ×1)
Swashplate Spherical Joint
∅8x ∅11x6 ( ×1)
Swashplate Joint Seat ( ×2)
Shim
∅2x ∅4.3x0.5mm ( ×3)
4-1 swash plate assembly
※ The swashplate comes pre-assembled
with thread locker from the factory, there
is no need to disassemble it again.
(Already installed with retaining compound)
(Already installed with retaining compound)
(Items are shipped pre-lubricated)
Socket cap screw
M2.5x8mm ( ×1)
M4X-401
Socket cap screw
M2.5x6mm ( ×4)
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Installation steps 安装步骤

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4-2 Main rotor hub assembly
Bearing ∅ 5x ∅10x4mm (×4)
Thrust Bearing
∅5x ∅10x4mm (×2)
Shim
∅5x ∅6x0.5mm ( ×2)
Main Rotor Blade
Grip ( ×2)
Main Rotor Blade
Grip Arm ( ×2)
Socket cap screw
M2.5x6mm (× 4)
Ball Joint Screw - L3 (×2)
Bearing ∅ 2x ∅5x2.5mm (×4)
Swashplate Driver
Arm ( ×2)
Swashplate Driver
Joint ( ×2)
Shim
∅2x ∅3.2x0.5mm ( ×2)
Shim
∅2x ∅3.2x0.5mm ( ×2)
Main Rotor Yoke ( ×1)
Spindle Shaft
∅5x73mm ( ×1)
Main Rotor Rubber Damper
Shore ∅ 5x ∅10x8 ( ×2)
Socket cap screw
M2x 1 6mm (× 2)
Damper Shim ( ×2)
∅5x ∅9x0.6mm
Shim
∅3x ∅6.5x0.5mm ( ×2)
Socket cap screw
M 3 x6mm (× 2)
Inner Dia. : Large
Inner Dia. : Small
※ The stepped side of the shim faces
outwards toward the blade grip.
Installation steps 安装步骤
(Already installed with retaining compound)
Grease
(Items are shipped pre-lubricated)
(Already installed with retaining compound) Swashplate Driver Pin (×2)
E-type circlip (×2)

Main rotor hub linkage ( ×2)
4.5mm linkage Ball Joint Set (×4)
※ First fix the XT60 plug holder (optional) to the
battery plate with countersunk head screws, then
insert the XT60 plug through the XT60 plug holder
support and secure it in place with set screws.
Lastly, tie the battery to the tray with battery straps.
XT60 plug holder set (×1)
Battery panel set ( ×1)
4-2 Main rotor hub assembly
约38mm
※ Make two linkages of the same length, note that
turnbuckles feature one right hand and one left hand
thread each. The tapered side of the turnbuckle faces
down. The ball joint’s flat spot with OMP logo faces
outward when connecting the linkages with the ball
screws. The turnbuckles can be adjusted in length
without removing them from the helicopter.
Setscrew
M3x3mm (×2)
Countersunk head hexagon
socket screw
M2x6mm ( ×2)
6S Battery (×1)
XT60 plug holder set (×1)
※ Can optionally be added as per pilot preference.
Countersunk head
hexagon socket screw
M2x6mm ( ×2)
Setscrew
M3x3mm (×2)
Battery panel set ( ×1)
※ The main rotor hub thrust bearing and rubber dampers are subject to high
flight forces and thus should be periodically inspected and lubricated, and, if
worn or damaged, replaced. When flying hard at high rotor speeds, the
inspection interval should be reduced. Replace on condition to ensure flight
safety.
Battery strap ( ×2)
Battery strap ( ×2)
Main rotor hub set ( ×1)
Main rotor hub linkage ( ×2)
4.5mm linkage Ball
Joint Set (×4)
Socket cap screw
M2.5x15mm ( ×1)
M2.5 Nylon locknut ( ×1)
6S Battery (×1) Main rotor hub set ( ×1)
Socket cap screw
M2.5x15mm ( ×1) M2.5 Nylon locknut ( ×1)
M4X-402
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Installation steps 安装步骤

Socket cap screw
M3x18mm ( ×2)
M3 Nylon locknut ( ×2)
Main rotor 420mm ( ×2) M4X-71mm tail blade ( ×2) Shim
∅2x ∅8x0.2mm ( ×4)
4-3 Rotor blade installation
Main rotor 420mm ( ×2)
Shim
∅2x ∅8x0.2mm ( ×4)
※ This washer is only required for 2.6mm
root blade, such as RT-71, as well as the
OMPHOBBY 71mm tail blades. RT-72
don’t require these.
M4X-71mm tail
blade ( ×2)
Socket cap screw ( Thread
length 4mm)
M2x12mm ( ×2)
M2 Nylon locknut
(×2)
Socket cap screw
(Thread length 4mm)
M2x12mm ( ×2)
Socket cap screw
M3x18mm ( ×2) M2 Nylon locknut ( ×2) M3 Nylon locknut ( ×2)
※ Properly tighten the main and tail rotor blades so that they
do not fall under their own weight, but are easy to move in the
blade grips. Over-tightening may cause damage to the rotor
blade and compromise flight safety.
※ Please make sure to only use precisely balanced tail rotor
blades from reputable manufacturers. The M4's tail rotor spins
at very high RPM during flight, even slight imbalances in the tail
blades can place high stress on the tail mechanics.
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M4X-403
Installation steps 安装步骤

4-4 ESC, FC, Battery installation FC (×1)
FC Mounting Pad (×1)
FC (×1) Damping sticker (×1)
4-5 Canopy Installation allation
Canopy Rubber
Grommet (×2)
Canopy (×1)
Canopy (×1) Canopy Rubber Grommet (×2)
※ Recommended battery weight: 310-360g
Possible max battery dimensions in mm:
35x40x160 35x43x140
35x46x130 35x48x120
35x50x110 35x53x90
35x55x70
M4X-404
M4X-405
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Installation steps 安装步骤