Lynx Heli OXY 3 User manual

ID2018 Instruction Manual
Tareq Edition
revision 1

INDEX
Chapter 1 - Specifications .....................................................................................................................................................................................................................................................................................
Chapter 2 - Important Notes ....................................................................................................................................................................................................................................................................................
Chapter 3 - Required Tools for Assembly ...............................................................................................................................................................................................................................................................
Chapter 4 - What's Inside The Box .........................................................................................................................................................................................................................................................................
Chapter 5 - Pinion Selection & RPM .......................................................................................................................................................................................................................................................................
Chapter 6 - Tail Assembly .......................................................................................................................................................................................................................................................................................
Chapter 7 - Main Frame Assembly .........................................................................................................................................................................................................................................................................
Chapter 8 - Align and Lock Frame Panel ................................................................................................................................................................................................................................................................
Chapter 9 - Transmission Assembly .......................................................................................................................................................................................................................................................................
Chapter 10 - Belt Tension & Adjustment .................................................................................................................................................................................................................................................................
Chapter 11 - Main Rotor Assembly .........................................................................................................................................................................................................................................................................
Chapter 12 - ESC Installation .................................................................................................................................................................................................................................................................................
Chapter 13 - Flybarless Installation ........................................................................................................................................................................................................................................................................
Chapter 14 - Servo & Servo Rod Prepareration .....................................................................................................................................................................................................................................................
Chapter 15 - Cylic Servo Installation ......................................................................................................................................................................................................................................................................
Chapter 16 - Tail Servo Installation ........................................................................................................................................................................................................................................................................
Chapter 17 - Landing Gear & Battery Installation ...................................................................................................................................................................................................................................................
Chapter 18 - Main & Tail Blades Installation ...........................................................................................................................................................................................................................................................
Chapter 19 - Adjustment Servo with Leveler ..........................................................................................................................................................................................................................................................
Chapter 20 - Exploded View ...................................................................................................................................................................................................................................................................................
page 2
page 3
page 4
page 5 - 6
page 7
page 8 - 13
page 14 - 18
page 19
page 20-21
page 22
page 23-25
page 26
page 27
page 28
page 29
page 30
page 31
page 31
page 32-33
page 34-37
page 1

172mm
580mm
650mm
135mm
95mm
Chapter 1, Specifications
page 2
- Visit the Oxy Heli web site www.oxyheli.com to download the latest version of the manual.
- Inside Box 3 you will find your serial number card. Please take a moment to visit the Oxy Heli web site and follow the instructions to register your helicopter and serial number.
- It is important you take few minutes to register your helicopter and serial number with us. This is the only way to be in contact with us to receive news, promotional information and technical tips.
- We will also choose five serial numbers each year that will win a discount coupon worth 200USD each to spend at the Oxy Heli or Lynx Heli web sites.
- Thank you for your purchase, and we wish you the best enjoyment with your new Oxy 4 Helicopter.
VERY IMPORTANT NOTE:
-Standard main rotor diameter
-Standard main blade length
-Main Grip Clamping
-Standard tail rotor diameter
-Standard tail blade length
-Tail Blade Clamping
-Weight
-Maximum motor size
-Maximum battery size
:650mm (with 287mm blades).
: 287mm
: M2 / 5.6 mm root.
: 135 mm.
: 47/50 mm.
: M2 / 3.5 mm root.
: 445g (ready to fly excluding batteries)
: diameter 28mm.
: length 76mm, height 35mm, width 37mm, 170gr weight

IMPORTANT NOTE:
This model helicopter has been designed and produced to be a high performance 3D machine. With its simple design and low parts count, pilots of all skill levels will appreciate its easy repairability. This is not a toy.
Please take care assembling the model, and take care and responsibility when you fly it. We take no responsibility for any damage or injuries, either direct or consequential, from the use of this product. If you are not
experienced in the assembly and flying of a high performance model helicopter we recommend you seek the assistance of an experienced pilot. Above all, fly safely and we hope you enjoy this model.
SAFETY GUIDELINES:
Only fly this model in areas designated for the use of model aircraft. Ensure you obtain indemnity insurance, normally available
through your National model aircraft association. Remain at least 6 meters (20 feet) from the model at all times. Never allow
spectators or animals any closer than 30 meters (100 feet) from the model.
NOTES FOR ASSEMBLY:
Please read this instruction manual fully before beginning assembly of this model helicopter. Be sure to use quality tools during the assembly process, and remember not to overtighten small fasteners. Note the following
symbols which are used in this manual. Use thread lock sparingly where indicated. If you are unsure about an assembly step, please seek the advice of an experienced pilot. Warranty on any parts is only applicable
prior to assembly of the part on the model. NONE OF THE PRE ASSEMBLED PARTS HAVE THREAD LOCK ON THE SCREWS. IS IMPORTANT TO READ AND FOLLOW THE ASSEMBLY NOTES IN EACH STEP.
INCORRECT ASSEMBLY OR NOT USING THREAD LOCK WILL CAUSE A CRASH OR INJURY.
Important note Use CA Glue Use Loctite 243 Medium Strength Use Loctite 648 Bonding Use Silicone Grease
page 3

TOOLS REQUIRED
Chapter 3, Required Tools for assembly
Small Tip - Flat Screw Driver 1.5mm Hex Screw Driver
(High quality)
Two Tools Required
1.3mm Hex Screw Driver
(High quality)
One Tools Required
2.5mm Hex Screw Driver
(High quality)
Needle Nose Pliers
Uniball Pliers
Caliper
page 4
Note :
We recommend high quality steel tools during assembly.
Hex Screw driver in particular must have precise Tip
Hexagonal dimension.

page 6
Chapter 4, What's inside the box
OXY0133 - Towel
Accessories Bag
Tail Boom
Tail Push Rod
Main Blade
Canopy &
Landing Gear
Carton Layer
Outer Box Main Frame
SERIAL NUMBER
Box 1/ Bag 1 Vertical Fin
Box 1/ Bag 2 Tail Rotor
Box 1/ Bag 3 16T Tail Shaft
Box 1/ Bag 4 Tail Pitch Slider
Box 1/ Bag 5 Tail Bell Crank
Box 1/ Bag 6 Tail Belt
Box 1/ Bag 7 Tail Servo Mount
Box 1/ Bag 8 Boom Clamp
Box 1/ Bag 9 Upper Bearing Block
Box 1/ Bag 10 Middle Bearing Block
Box 1/ Bag 11 Lower Bearing Block
Box 1/ Bag 12 Break Away Canopy
Box 1/ Bag 13 Motor Mount
Box 1/ Bag 14 Battery Tray
Box 1/ Bag 15 Main Shaft
Box 1/ Bag 16 Main Gear
Box 1/ Bag 17 Main Rotor
Box 1/ Bag 18 Swash Plate
Box 1/ Bag 19 Servo Linkage Ball
Box 1/ Bag 20 Tail Blade
Box 1/ Bag 21 FBL Head System
Box 1/ Bag 22 C Washer

OXY 3 POWER SYSTEM AND HEAD SPEED SET-UP.
In order to choose your best Oxy 3 set up, and optimize performance, it is important to know some important information:
1- Motor Kv - (EOX 2214 - 4100 KV Standard Motor)
2- Battery Pack - (3s or 4s)
3- Your target Head Speed
If you use a head speed calculator that request main gear ratios, use 140 T for the main gear and select one of the pinion available
10T - 11T - 12T - 13T - 14T - 15T - (Standard Kit come with two pinions 11T and 14T, that ensures a Head Speed Range with 3 and 4S suitable
from Novice to Expert Pilot requests.
Head Speed Note: Although Oxy 3 can handle very high Head Speed, we suggest don’t exceed 4500 RPM to maintain a good compromise btw performances and efficiency.
Configuration examples
Since the Oxy 3 is a high performance 3D RC helicopter, we suggest using high quality power components including motor, battery and ESC. Remember the Oxy 3 is a 300 class heli - use light components to maximize flight time and performance.Here are some suggestions:
- Motor: Suggested KV 3000KV to 4500KV, 21-08 to 22-14 caliber series (stator diameter - stator length).
- Battery: 3 or 4S with capacity from 1300 to 1500mAh / 35C discharge rate. Maximum size: length 76mm, height 35mm, width 37mm,weight 180g.
- ESC: 35 to 40A - with BEC 6V or higher. Or use an external 5A BEC. The Oxy 3 Kit 002 comes with a 40A ESC, preset with 6V BEC and settings for the EOX 2214-4100KV motor.
- Cyclic servos: Standard MICRO size servo with metal gear - speed: =>0.06 sec/60 at 6V.
- Rudder servo: Standard MICRO size servo - speed =>0.06 sec/60 at 6V - a specific rudder servo is suggested for best tail authority.
- FBL system: The Oxy 3 was designed around the Ikon / Brain and Mini V-Bar Systems. But many other good quality FBL systems can be used, depending on your personal choice.
- Main blade: The Oxy 3 can fly with plastic or CF main blades from 245 to 255mm. Our testing was with Lynx 245mm plastic main blades, and Zeal 250mm and 255mm CF main blades.The Oxy 3 main grips use M2 clamp screw and have a 5.6mm root.
- Tail blades: The Oxy 3 uses our own OEM tail blades, either 47 or 50mm (included with the kit). They use a M2 clamp screw and 3.5 root. We offer 47 and 50mm tail blades to suit different head speeds. Use 50mm tail blades when your head speed is lower than
3500rpm and 47mm with higher head speeds.
Oxy 3 Fly Style / Head Speed / Main Blade / Tail Blade / Max Pitch suggestion chart:
page 6

Vertical Fin Assembly
(box1/bag 1)
3x10x4 Radial Bearing
OXY0402
Vertical Fin
OXY0401
Tail Case
Loctite 243
CA Glue
Tail Case Assembly
(box1/bag 1)
Important Note:
This part, for tuning reasons,
comes factory pre assembled,
it ready to us
Important Note:
This part, for tuning reasons,
comes factory pre assembled,
it ready to us
Important Note:
This part, for tuning reasons,
comes factory pre assembled,
it ready to us
Tail Rotor Assembly
(box1/bag 2)
Important Note:
This part comes pre assembled
WITHOUT thread lock. It MUST be
re-assembled with thread lock as shown.
OXY0710 - OXY4
Tail Grip
MR63-X - 3X6X2
Radial Bearing
OXY0054 - 3X4X0.1 Shim
F3-6M-3x6x2.8 Thrust Bearing
OXY0723 - Tail Grip Spacer
OXY0049-Tail Hub
OXY0054
3X4X0.1 Shim
O-Ring ID2 W1
OXY0055
2X3.5X0.5 Washer
TCEM2X5 - M2X5
Hex Cap Screw
OXY0050 - linkage
ball 4 X 3 M2
3x10x4-Flange Bearing
add silicon grease
Chapter 6: Tail Assembly
page 7

Tail Shaft Assembly
(box1/bag 3)
MF74_2GS
4x7x2.5 flange bearing1
OXY0063
Tail Pitch Slider Haft Moon
OXY0061
Tail Pitch Slider Ring
OXY0060
Tail Pitch Slider Bushing
OXY0060
Tail Pitch Slider Bushing
Important Note:
This part, for tuning reasons,
comes factory pre assembled,
it ready to use.
OXY0064
Link Control
OXY0062
2X3X2 Bushing
Important note:
This part comes pre assembled
WITHOUT thread lock. It MUST be
re-assembled with thread lock as shown.
Tail Pitch Slider Assembly
(box1/bag 4)
page 8
Important Note:
This part, for tuning reasons,
comes factory pre assembled,
it ready to use.
16T Tail Shaft
Chapter 6: Tail Assembly

Tail Belt Tensioner Assembly
( box1/bag5 )
Tail Belt Crank Support Assembly
( box1/bag5 )
Tail Belt Crank Assembly
( box1/bag5 )
Important note:
This part comes pre assembled
WITHOUT thread lock. It MUST be
re-assembled with thread lock as shown.
Important note:
This part comes pre assembled
WITHOUT thread lock. It MUST be
re-assembled with thread lock as shown.
Important note:
This part comes pre assembled
WITHOUT thread lock. It MUST be
re-assembled with thread lock as shown.
OXY0071
Beaing Bushing
TBEM2x3
M2x3 Button Screw
MR63_ZZC
3X6X2.5 Radial Bearing
MF682ZZ
2x5x2.3 Flange Bearing
page 9
OXY0390
AL Tail Belt Crank
TCEM1.6x5
M1.6x5 Hex Cap Screw
2 x OXY0057
Pin Screw
OXY0092
4mm Linkage Ball
OXY0924
CF Bell Crank Arm
M2 Hex Nut
OXY0058
Tail Bell Crank Support
Chapter 6: Tail Assembly

OXY0377-Carbon Rod
OXY0666-OXY4 SST Threaded Rod M2X10
OXY0716-linkage Ball M2 thread
Step 1:
Note: to install this
pin screw rotate
counter clock wire
Note Pin Screw Thread: Pin Screw
Oxy designed the Pin Screw with
a counter clockwise thread. This
will help on the final locking
operation. Be careful to follow our
instructions to get a perfect assembly
OXY0620-Guide
Push Rod
2 x OXY0539
Pin Screw
Note: Install the Pin Screw
and leavea gap as shown.
Step 2:
Push the part inside the
boom sockets as shown
Step 3:
Step 4: Slide the parts as shown
In order to lock the tail push rod
support, use a Flat Screw Driver
and turn clockwise. Do not
over tighten.
Step 5:
page 10
Important Note:
This part, for tuning reasons,
comes factory pre assembly,
it ready to use
Chapter 6: Tail Assembly
0.60mm

Tail Boom Assembly
B424MXL Timing Belt
OXY0073
Tail Case Insert
( box1/ bag6 )
TCEM2x5
M2x5 Hex Cap Screw
TBEM2x5
M2x5 Button Screw
Tail Case Assembly
Tail Bell Crank Suppport Assembly
Tensioner Assembly
Tail Shaft Assembly
Vertilcal Fin Assembly
OXY0072
Tail Case Cover
before install any shim
read carefully fine
adjustment shims note.
Note: all screws in this step
need add loctite during assembly.
Fine Adjust Shims Note :
In order to give fine adjustment options,
in the Extra Hardware Bag you will find
extra shims 4X6X0.1.
Start assembly WITHOUT any
shims. If Tail Shaft has sideways play
more than 0.2mm,
add shims as required, to one side, as shown.
PRO TIPS: For best Tail performances little
side play is recommended.
4xTCEM2x5
M2x5 Hex Cap Screw
loctite 243
loctite 243
loctite 243
TBEM2x5
M2x5 Button Screw
4xM2 C Washer
page 11
Chapter 6: Tail Assembly

B
OXY0389
AL Tail Servo Mount
( box1/bag7 )
SCM3x3-
Set Screw M3x3
Note: Line up the
holes, so the set
screw seats correctly
into tail shaft lock hole.
2 x TBEM2X5 - M2X5
Button Screw
page 12
Chapter 6: Tail Assembly
loctite 243 loctite 243
Tail Bell Crank Assembly

TAIL BELT ASSEMBLY AND DIRECTION CHECK:
In order to check correct belt install,
move belt position A CW and
the position B must rotate CW.
Before go forward on Tail Assembly check carefully
if Belt is installed per need.
Belt MUST move without any friction.
Step 5-1:
Tail belt is showed straight coming out,
form tail boom. Be careful to
check the belt if not twisted inside the boom.
Use a flashlight to check inside the boom, for better vision.
Rotate the belt 90 degrees CCW as shown.
90
CCW Rotation.
A
B
page 13
Chapter 6: Tail Assembly

Step 5-2:
Hold carefully Tail Belt as showed and insert
Front Boom Insert.A
Step 5-3:
Final Tail Belt Direction Check:
Pull Tail Belt (as shown) and check the tail hub rotates
in the direction shown. If the Tail Rotor rotates
in the wrong direction, go back to the previous
instructions and double check your assembly.
OXY0752-Front
Boom Insert
(Box 3/Bag )
Press in this insert parts into
Tail Boom to help Tail Belt
doesn't twist in the next
installation step
Pull Tail Belt here
page 14
Chapter 6: Tail Assembly

Boom Clamp Assembly
( box1/bag8)
Install the Pins into the Pulley
Guides and press completely into
the Tail Boom Clamp Socket Lips
2 x Pulley Guide Belt Assembly
OXY0388
AL Pulley Guide Belt
OXY0023
Pin 2X13.5
2x5x2 Raial Bearing
loctite 648
OXY0002
Boom Clamp
OXY0022-Lock Rod
Upper Bearing Block Assembly
( box1/bag9 )
loctite 648
OXY0026-Upper Main Shaft Bearing Block
4x10x4 Raial Bearing
loctite 648
OXY0027-Middle Main Shaft Bearing Block
Middle Bearing Block Assembly
(box1/bag 10 )
page 15
Chapter 7: Main Frame Assembly

16
11
3
Lower Main Shaft Bearing Block
( box1/ bag 11 )
4x10x4 Radial Bearing
OXY0083-Lower Main Shaft Bearing Block
Break Away Canopy Assembly
( box1/bag 12 )
OXY0033
Break Way Canopy
TCEM2x5
M2x5 Hex Cap Screw
OXY0385
Canopy Mount
Motor Assembly
(box1/bag 13)
SCM3x3 -
Set Screw M3x3
Pinion
( box1/bag13)
OXY0029
Motor Mount
( box1/bag 13 )
This hole is in the
nose of helicopter
TCEM3X8
M3x8 Hex Cap Screw
page 16
Chapter 7: Main Frame Assembly

8 x M2x5 Hex Cap Screw
Note: Don't fully tighten yet.
Wait future neccessary
assembly step.
OXY0922
AL Motor Mount Stiffener ED2018
6 x M2 C Washer
TCEM2x5
M2x5 Hex Cap Screw
OXY0921
OXY3 Main Frame ED2018
OXY0387
AL Stiffener
4 x M2 C Washer
2 x TBES2x6
M2x6 Self Tapping Screw
6 x Hex Cap screws in this step
Note: Don't fully tighten yet.
Wait future neccessary
assembly step.
TCEM2x6
M2x6 Hex Cap Screw
TCEM2x8
M2x8 Hex Cap Screw
Upper Bearing
Block Assembly
Middle Bearing
Block Assembly
Lower Bearing
Block Assembly
Motor Assembly
loctite 243
loctite 243
Battery Tray
( box1/bag 14)
Boom Clamp
Chapter 7: Main Frame Assembly
page 17

All Screw in this step
Note: Don't fully tighten yet.
See assembly alignment
Step page 19.
M2x6 Self
Tapping Screw
2xTCEM2x6
M2x6 Hex Cap Screw
4xTCEM2x8
M2x8 Hex Cap Screw
OXY0387-AL Stiffener
AL Motor Mount Stiffener
8 x TCEM2x5
M2x5 Hex Cap Screw
Chapter 7: Main Frame Assembly
page 18

90°
90°
Install main shaft with frame assembly
on a flat surface, push down on both frames
together and then fully tighten all M2 Hex Cap
Screws (x16) holding the bearing blocks.
Main Shaft
( Box1/bag15)
page 19
Chapter 7: Main Frame Assembly