Roban Bell 407 User manual

INSTRUCTION MANUAL
Bell 407
True Scale
1/13 CCPM OUTDOOR RC HELICOPTER

True Scale Bell 407 Instruction Manual
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SPECIFICATIONS:
Motor:* 1x 2222 2000KV br shless o tr nner, 6S capable
Speed controller:* 1x 45A br shless, 6S capable
Servo:* 3x 9g metal gear cyclic, 1x 9g metal gear tail servo
Rotor Blades: 320mm slim
Battery:* 22.2V 1250mAh 25C
Flight time: 5 min tes
Takeoff weight: 1200g
Flight Stabilization:* 3 axis flybarless
Radio Control:* min. 6 channel with pitch and throttle c rves
*) Optionally available equipment
INTRODUCTION
Thank you for your confi ence in the pro uct. We congratulate you on your choice to
purchase a quality pro uct, which results from a long time evelopment.
The TRUE SCALE Bell 470 is readily mo nted in the f selage. It is fitted to the se of standard
450 sized electronic components. Complete electronics are available from Roban optionally, b t
m st be installed, wired and adj sted properly.
We wish you a lot of fun with our helicopter!
Being a f ll scale prod ct, Roban´s Bell 407 profits from an o tstanding design as well as from
perfect o tdoor sability. With acrobatic flight capability and a f lly gyro stabilized flybarless m lti
blade head, the Roban Bell 407 is intended for intermediate helicopter pilots. And altho gh the
Roban Bell 407 is easy to control right o t of the box, please take the time to read thro gh this
man al completely in order to ass re yo are getting the maxim m o t of this st nning and
technically top edge prod ct.
Warning
A RC aircraft is not a toy! If mis sed, it can ca se serio s bodily harm and damage to property.
Fly only in open areas, preferably at AMA (Academy of Model Aerona tics) approved flying sites,
following all instr ctions incl ded with yo r radio. Keep loose items that can get entangled in the
rotor blades away from the main blades, incl ding loose clothing, or other objects s ch as pencils
and screwdrivers. Especially keep yo r hands away from the rotor blades. Rotors become
invisible once spinning.
Before Starting Assembly
Before starting any assembly and preparing yo r Roban Bell 407 for flight, remove each
component from the box for inspection. Closely inspect all components for damage. If yo find
any damaged or missing parts, contact the place of p rchase.
Note on Lithium Polymer Batteries
Lithi m Polymer batteries are significantly more volatile than alkaline or Ni-Cd/Ni-MH batteries
sed in RC applications. All man fact rer's instr ctions and warnings m st be followed closely.

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Mishandling of Li-Po batteries can res lt in fire. Always follow yo r local waste disposal
instr ctions when disposing of Lithi m Polymer batteries.
Using the Manual
This man al is divided into sections to help make assembly, adj stment and preparing for flight
easier to nderstand, and to provide breaks between each major section. Remember to take
yo r time and follow all directions.
Safety Precautions
This is a sophisticated hobby prod ct and not a toy. It m st be operated with ca tion and
common sense and req ires some basic mechanical ability. Fail re to operate this prod ct in a
safe and responsible manner co ld res lt in inj ry or damage to the prod ct or other property.
This prod ct is not intended for se by children witho t direct ad lt s pervision.
The prod ct man al contains instr ctions for safety, operation and maintenance. It is essential to
read and follow all the instr ctions and warnings in the man al, prior to assembly, set p or se,
in order to operate correctly and avoid damage or inj ry.
Safety, Precautions an Warnings
As the ser of this prod ct yo are solely responsible for operating it in manner that does not
endanger yo rself and others or res lt in damage to the prod ct or the property of others. This
model is controlled by a radio signal that is s bject to interference from many so rces o tside
yo r control. This interference can ca se momentary loss of control so it is advisable to always
keep a safe distance in all directions aro nd yo r model, as this margin will help to avoid
collisions or inj ry.
-Never operate yo r model with low transmitter batteries.
-Always operate yo r model in an open area away from cars, traffic, or people.
-Avoid operating yo r model in the street where inj ry or damage can occ r.
-Never operate the model o t into the street or pop lated areas for any reason.
-Caref lly follow the directions and warnings for this and any optional s pport eq ipment
that yo se.
-Keep all chemicals, small parts and anything electrical o t of the reach of children.
-Moist re ca ses damage to electronics. Avoid water expos re to all eq ipment not
specifically designed and protected for this p rpose.
-Never lick or place any portion of yo r Roban Bell 407 in yo r mo th as it
co ld ca se serio s inj ry or even death.
Locking
As with any RC model helicopter, all fasteners installed into metal parts m st se bl e loctite®
#222 and all bearings installed in holders m st se red loctite® #641.
ROBAN BELL 407 STANDARD KIT Contents
No.: Item
1. Mechanics Sets, partially assembled
2. F selage, completely assembled
3. Blades
4. Electronic Set (PNP version, optional)

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5. Scale accessories and installation accessories
6. Decals
7. Instr ction Man al
Require Consumables:
Bl e thread lock
Red thread lock
30 min te epoxy
CA or S per Gl e
Foam backed tape
Zip ties
Tape
Tools:
Hobby knife
Hex screw driver set
Phillips screw driver set
Needle nose pliers
Diagonal c tting pliers
Soldering eq ipment
Wire strippers
Terms an Definitions
Fuselage – the scale h ll of the helicopter
Pitch- rotating the aircraft aro nd the pitch axis (elevator, nick)
Yaw- rotating the aircraft aro nd the vertical axis (r dder)
Roll- rotating the aircraft aro nd longit dinal axis (aileron)
Collective pitch- changing all the blades pitch the same amo nt
Cyclic- Changing the blades pitch by tilting the swash plate
TX- transmitter
RX receiver
Electronic Spee Controller- (ESC)
Term: Pitch, Elevator, Fore/Aft cyclic or Nic, have the same meaning
Term: Collective Pitch is not the same as Pitch
Term: Yaw and R dder, have the same meaning
Term: Roll and Aileron, have the same meaning
The Throttle and Collective Pitch stick are combined; this is typical for model helicopters

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SECTION A – MECHANIC ASSEMBLY
NOTE: As with any RC model helicopter, all fasteners installed into metal parts m st se bl e
thread lock and all bearings installed into metal bearing blocks m st se red bearing lock, wipe
off excess.
The Mechanics are preassembled and installed into the mechanics. In order to mo nt the
electrical eq ipment, yo have to ninstall the mechanics first.
1) Remove Mechanics
a) Remove the two screws holding the ceiling first and remove the ceiling. Then remove
the six main frame screws as shown.
2) Remove tail frame
a) Remove the screws that lock the tail frame cover in place. Remove tail cover, gently
npl g the connector for the position light.

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b) Remove the screws as shown from the tail frame and remove the tail frame as shown
incl ding the bearing. Disconnect the servo linkage. Then p sh the other bearing in the
frame o t of its block, only this way yo can release the tail belts tension. Remove belt
from p lley. Remove tail frame from tail boom by removing all three screws.
3) Remove Mechanics
a) Now gently p ll the mechanics o t of the f selage as shown.

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SECTION B – INSTALLATION OF ELECTRONIC COMPONENTS
1) Install Motor
a) Install Pinion gear on motor. Event ally add a flat with a file to the motor shaft for
sec rity where the gr b screw engages the shaft. Make s re the pinion gear is installed
at the appropriate height to f lly engage the main gear.
b) Install motor in main frame. Adj st the gear mesh. The tail boom holder does have
access holes so than an allen key can pass thro gh it and access the motor holding
screws.
2) Install Cyclic Servos
a) Install ball links on the servo levers, the distance between ball link center and servo shaft
sho ld be at 12.5mm. Install all three cyclic servos as shown in their mo nting positions.
Please see exhibit A step 9 and 12. Event ally se washers, depending on the servo yo
are sing to correct the mo nting position.
b) Mo nt the main rotor head as show in exhibit A step 5 and connect it to the swash plate.
3) Install Tail Servo
a) Install ball link as shown in exhibit A step 14 and 16 on the servo lever, the distance
between ball link center and servo shaft sho ld be at 12.5mm.
b) Install servo as shown in the proper position in the tail servo holder.
4) Install Gyro
Note: In order to fly this helicopter properly, it is necessary to connect a flybarless 3 axis gyro
nit between yo r receiver and the servos. Flying this helicopter with a single axis tail gyro
will lead to a very npredictable and hard to control flying behavior. Yo m stn´t se other
eq ipment than flybarless 3 axis gyros. A 3 axis gyro is incl ded with the optional electronic
set and also separately available. Yet any good 3 axis gyro for flybarless rotor heads is
s itable for the se on this helicopter.
a) Install the 3 axis gyro and connect all servos properly following the gyro instr ction
man al. Use the foam tape s pplied with the gyro to install the gyro in the marked area
after yo reinstalled the mechanics. It is not recommended to install the gyro on the
carbon fiber main frame. Some gyros req ire a special set p of two layers of foam tape
to red ce sensitivity to vibrations.

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b) Connect the Gyro to the RX following the gyro instr ction man al.
5) Install ESC
a) Solder the s pplied battery connector prolonging wire to the ESC.
b) Connect the motor to the ESC
c) Connect ESC to RX.
d) The ESC will have to be disconnected from the motor and RX before installing the
mechanics. Do not fix it with tape or zip ties for now.
SECTION C – ADJUSTMENTS AND ELECTRONIC SETUP
NOTE: The main rotor blades are matched by weight and marked as matched pairs with stickers
A and B in order to disting ish them. Please do not remove the stickers nor the balancing tape
stripes on the rotor blades. Please do not mo nt the rotor blades before yo reach the according
step in the assembly man al. Mo nt the rotor head and the servo rods as shown in Exhibit A-5.
1) Servo Set p
a) Make s re that all servo levers are mo nted so that the servo lever is rectang lar to the
servo ho sing while centered. Yo might have to power p the servos to determine this
position.
b) For the three cyclic servos, it is important to match that when all three servos are in their
center positions, the swash plate m st be leveled and at its 0 degree CP position. This
eq als a distance between the lower edge of the swashplate to the pper end of the
servo s pport of 10.5mm. Depending on the servos yo are sing, the lengths of the
p shrods might differ slightly from the s ggested lengths below: servo to L-lever
51.5mm, L-lever to swashplate 34mm, swashplate to blade grip 45mm, meas red ball
link center to center.
c) First of all, mo nt the tail rotor frame again which yo dismo nted in Section A-1 and
connect the tail servo linkage. For the tail servo, make s re that the servo is prod cing 0
degrees pitch on the tail rotor blades once in centered position.
2) Test Motor
a) Dismo nt the rotor blades, if yo have mo nted them already. Please t rn the motor
with yo r hand and check if the gear meshing between motor pinion and main gear is
appropriate. Make s re that the tail belt is tensioned properly. The main rotor has to spin
co nter clockwise if viewed from above the helicopter, the tail rotor blades have to spin
clockwise if the viewed from the left side. Then power p the motor via ESC and verify
that the motor does spin in the proper direction (nothing will happen if it spins in the
wrong direction), event ally correct the direction.
3) Test Gyro / RX Set p

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a) In order to test yo r gyro, please follow yo r gyros instr ction man al. Gyro gain settings
and fine t ning has to be done after the helicopter is installed into the f selage. Please
be advised that the swash plate is a 140deg and not a 120deg CCPM.
b) If sing the Roban 3 axis gyro, please se the following parameters (online)
4) Test TX
a) In order to test yo r TX and the proper set p, please follow yo r radio controls ser
man al. Fine t ning and trimming can be adj sted once the helicopter is installed into
the f selage. For now a mere reaction to yo r control inp ts does s ffice.
SECTION D – INSTALLATION INTO THE FUSELAGE
1) Mechanics
a) Dismo nt the tail frame, as in Section A-1.
b) The battery connector has to reach the battery compartment, so that yo can connect
the battery later on. We recommend to disconnect the ESC from the Motor and receiver.
Then make s re the battery connector reaches the battery compartment, as the area will
be inaccessible once the mechanics are installed. Then install the mechanics into the
f selage as shown. Make s re to lock the mechanics sec rely. Mo nt the cabin ceiling
and lock it in place.
c) Reinstall the tail frame and the tail cover by reversing the steps in section A step 1.
Check by t rning the motor with yo r hand if the mechanics operate smoothly.
d) Connect the ESC to the motor and receiver again.
2) Position light
a) Connect the LED position light pl g with an AUX port on yo r RX. If yo r RX doesn´t
provide eno gh ports, yo have to Y-Wire the black and red line to the ESCs Servo wire,
or yo r LEDs will not t rn on.

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b) Arrange all wires properly, make s re that the motor hatch can enclose all electronic
parts witho t problems.
3) Sec ring Cables and Wires
a) The helicopter´s mechanics are b ilt very compact. It is necessary that yo make s re
that all wires and cables are locked in sec re spaces sing zip ties or spiral cords. Make
s re that no wire to ches any mechanical part and is sec red against movements.
4) Battery
a) Make s re that the battery is always p shed all the way forward in the battery
compartment. The helicopter has an inclinded main shaft, the main shaft has to be
perpenci lar to the gro nd, the helicopters tail will, as on the real helicopter, slightly hang
down.
SECTION E – FINAL ADJUSTMENTS
1) TX Set p
a) Almost all 3 axis gyros on the market req ire that yo switch the CCPM mixing inside
yo r radio control off and provide nmixed AIL; ELE and PIT inp ts. That will be a 90
degree swash plate program on most radio controls.
b) For the throttle c rve, Please program 0% at 0, 50% at 85, 100% lever position at 100%
throttle signal.
c) For the pitch c rve, please adj st it to -2deg at 0%, 5deg at 50% and 11deg at 100%
lever position. Please adj st this with a pitch ga ge.
2) Main Rotor Blades
a) Mo nt the rotor head again, and connect it to the swash plate.
b) Please be aware that the blades s pplied are balanced by pairs and labeled with stickers
indicating A and B to disting ish the pairs. Each pair of rotor blades has to be mo nted
on the exact opposite grip, at 180deg from each other to gain proper center of gravity on
the main rotor h b. Fail re to do so res lts in vibrations, which can lead to poor gyro
performance or electronic fail re (bad gyro readings) or even mechanical fail re d e to
overloaded parts on the cyclic swash plate system. Do not try to fly if yo experience
vibrations.
c) Make s re that yo remember to identify yo r rotor blades in the event of taking them
off.
d) Make s re to adj st yo r main rotor blade tracking.
3) Test fly
a) Caref lly fly yo r helicopter o tdoors at calm wind conditions to check yo r set p. Adj st
yo r radio and gyro to f lfill yo r needs.
b) After yo are s re that all components are working perfectly, nmo nts the rotor head,
install the motor hatch as shown and mo nt the rotor head again.

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EXHIBIT A – MECHANICAL ASSEMBLY
NOTE: As the helicopter is readily assembled the following explosion drawings are a g ide to the
according spare part n mbers, b t also a g ide on how to set p the mechanics.
1) Swash plate h b
2) Swash plate
1-JX-47-00021
1-JX-47-00019
1-JX-47-00028
1-JX-47-00029
1-JX-47-00030
1-JX-47-00009
1-JX-47-00022
1-JX-47-00024
1-JX-47-00023
1-JX-47-00025
1-JX-47-00026
1-JX-47-00016
1-JX-47-00015
1-JX-47-00014
1-JX-47-00021
1-JX-47-00012
1-JX-47-00011
1-JX-47-00017
1-JX-47-00018

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3) Rotor head
4) Main Shaft
1-JX-47-00109
1-JX-47-00102
1-JX-47-00110
1-JX-47-00105
1-JX-47-00113
1-JX-47-00104
1-JX-47-00130
1-JX-47-00122
1-JX-47-00106
1-JX-47-00112
1-JX-47-00106
1-JX-47-00108
1-JX-47-00107
1-JX-47-00109
1-JX-47-00006
1-JX-47-00007
1-JX-47-00005

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5) Complete CCPM assy
6) Main Frame
1-JX-47-00001
1-JX-47-00000
1-JX-47-00114
1-JX-47-00000
1-JX-47-00000
1-JX-47-00051
1-JX-47-00002
1-JX-47-00000
1-JX-47-00001
1-JX-47-00003

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7) Front servo holder
8) Servo levers
1-JX-47-00059
1-JX-47-00054
1-JX-47-00058
1-JX-47-00057
1-JX-47-00013
1-JX-47-00027
1-JX-47-00057
1-JX-47-00014
1-JX-47-00028
1-JX-47-00055

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9) Front Servo Assy
10) Tail gearbox frame
1-JX-47-00000
1-JX-47-00025
1-JX-47-00062
1-JX-47-00015
1-JX-47-00014
1-JX-47-00049
1-JX-47-00024
1-JX-47-00060
1-JX-47-00014
1-JX-47-00063
1-JX-47-00046
1-JX-47-00045

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11) Aft servo holder
12) Aft servo assy
1-JX-47-00053
1-JX-47-00054
1-JX-47-00000
1-JX-47-00052
1-JX-47-00015
1-JX-47-00054
1-JX-47-00007

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13) Tail boom holder assy
14) Tail servo and main gear assy
1-JX-47-00032
1-JX-47-00038
- 1-JX-47-00040
1-JX-47-00007
1-JX-47-00064
1-JX-47-00007
1-JX-47-00066
1-JX-47-00010
1-JX-47-00065
1-JX-47-00075
1-JX-47-00069
1-JX-47-00072
1-JX-47-00032
1-JX-47-00033
1-JX-47-00037
1-JX-47-00034
1-JX-47-00036
1-JX-47-00037
1-JX-47-00031
1-JX-47-00038
1-JX-47-00007
1-JX-47-00030
1-JX-47-00010
1-JX-47-00054
1-JX-47-00050
1-JX-47-00074
1-JX-47-00061
1-JX-47-00026
1-JX-47-00014
1-JX-47-00015

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15) Main gear assy
16) Mo nting the main frame
1-JX-47-00004
1-JX-47-00010
1-JX-47-00009
1-JX-47-00048

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17) Tail frame assy
18) Tail rotor assy
1-JX-47-00082
1-JX-47-00026
1-JX-47-00030
1-JX-47-00078
1-JX-47-00030
1-JX-47-00080
1-JX-47-00032
1-JX-47-00077
1-JX-47-00076
1-JX-47-00083
1-JX-47-00032
1-JX-47-00088
1-JX-47-00054
1-JX-47-00027
1-JX-47-00085
1-JX-47-00086
1-JX-47-00091
1-JX-47-00084
1-JX-47-00115
1-JX-47-00007
1-JX-47-00094
1-JX-47-00027
1-JX-47-00093
1-JX-47-00027
1-JX-47-00000
1-JX-47-00089
1-JX-47-00099
1-JX-47-00096
1-JX-47-00095
1-JX-47-00098
1-JX-47-00097
1-JX-47-00113
1-JX-47-00092
1-JX-47-00014
1-JX-47-00096
1-JX-47-00015
1-JX-47-00087
1-JX-47-00100
1-JX-47-00090

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19) Complete mechanics