THUNDER TIGER TTR4571 User manual

1/6 Rare Bear ARF
Unlimited Pylon Racer
1
ThunderTiger Rare Bear ARF Airplane (TTR4571)
Distributed in NorthAmerica by Ace Hobby Distributors,Inc.• 2055 Main Street,Irvine,CA 92614
Telephone:[phone] • www.acehobby.com • E-mail:[e-mail]
Specification:
Wingspan:63" (1600mm)
Length:55.5" (1410mm)
Weight:10.5~11 lbs (4800–5000g)
Engine:.60~ .90 2C .91~1.20 4C
Radio:5CH
Servo:5 servos plus 1 retract servo
Warranty
This kit is guaranteed to be free from defects in material and workmanship at the date of purchase. It
does not cover any damage caused by use or modification. The warranty does not extend beyond the
product itself and is limited only to the original cost of the kit. By the act of building this user-assembled
kit,the user accepts all resulting in liability for damage caused by the final product. If the buyer is not
prepared to accept this liability,it can be returned new and unused to the place of purchase for a refund.
Notice: Adult Supervision Required
This is not a toy. Assembly and flying of this product requires adult supervision.
Read through this book completely and become familiar with the assembly and flight of this airplane.
Inspect all parts for completeness and damage. If you encounter any problems,call us for help. JE6660V2
Assembly Manual

2
INTRODUCTION
PRE-ASSEMBLY NOTES
Congratulations on the purchase of one of our finest ARFs to date. The ever-popular Rare Bear piloted by
John Penney qualified with the fastest qualification time in the Unlimited Class at 495.039 mph of the 40th
National ChampionshipsAir Race &Air Show,which was held in Reno Stead Field.For more information please
browse www.rarebear.com for more information.
ThunderTiger has teamed up with the Rare Bear Racing team to bring this legendary airplane to your hands;
ThunderTiger is proudly to present the only officially licensed 1/6th replica of the "Bear" to all the R/C hobbyist
alike worldwide! It's a replica that has stayed true to the "Bear" in its purest form,pre-painted fiberglass fuselage
and cowl,scale details like panel line and retract well with gear door*etc.With it,you can now experience the
thrill of piloting one of the best racing planes in the history! Fly it low*fly it fast to experience the ultimate thrill
and pylon racing excitement of the "BEAR". Go Bear!
Before beginning the assembly read the instructions thoroughly to give an understanding of the
sequence of steps and a general awareness of the recommended assembly procedures.
By following these instructions carefully and referring to the corresponding pictures,the assembly of
your model will be both enjoyable and rewarding. The result will be a well built,easy to assembleA.R.F.
model,which you will be proud to display.
This Rare Bear is designed for advanced pilots and it requires advanced assembling and flying skill.
Before you begin,check the entire contents of your kit against the parts list and photos to make sure
that no parts are missing or damaged. This will also help you to become familiar with each component of
your plane. If you find that any of the parts are either missing or damaged,please contactAce Hobby
Distributors,Inc.,Customer Service immediately for replacements.
Please read the entire manual before beginning construction.
Neither your dealer nor Ace Hobby Distributors, Inc., can accept kits for return if construction has begun.
Trial fit each part before gluing it in place. Make sure you are using the correct part and that it fits
well before assembling. No amount of glue can make up for a poor-fitting part.
Always apply Loctite ( not furnished) to all screws and nuts to prevent them from loosening .
TABLE OF CONTENTS
Introduction................................................. 2
RecommendedTools & Materials............. 3
Parts Drawings............................................ 4-5
Parts Check List.......................................... 6
Wing Assembly............................................ 7-8
Fuselage........................................................9-10
Tail Feathers.................................................11
Rudder Installation......................................12
Tail Gear Section.........................................13-14
FuelTank.......................................................15
Engine Installation.......................................16
Retract Servo Installation...........................16-18
Cowling Installation......................................18
Cockpit Installation......................................19
Balance.......................................................... 20

3
RECOMMENDEDTOOLS & MATERIALS
Adhesives:
Instant setting Cyanoacrylate adhesive (thin CA)
Slow setting Cyanoacrylate adhesive (thick CA)
10 Minute Epoxy (fast)
20-30 Minute Epoxy (slow)
Tools:
Model knife,T-Pins,1/2”MASK tape
Small screwdrivers,medium screwdrivers
Scissors
Steel straight edge
Long nose pliers and diagonal cutting pliers
Drill and drill bits (1/16",5/64",3.4mm)
M4x0.7Tap
Sanding block
Fine felt tip pen and soft lead pencil
Straight building board
R/C System:
6 Channel radio with 5 servos plus one retract servo
Two 24" extension wires for Flapron Function
One 6" extension wire for Battery
or
5 Channel radio with 5 servos plus one retract servo
Two 12" extension wires and one "Y" extension wire
forAileron
One 6" extension wire for Battery
Engine:
2 cycle:.61~.91
4 cycle:.91~1.2
Propeller:
Appropriate for engine type and preferred
performance
Adhesives -You will need two types of adhesives for the
Rare Bear - Epoxy and Instant (cyanoacrylate) adhesives.
We recommend that you purchase both 5-minute and 30-
minute epoxy to cut down on assembly time, but you can
get by with only 30-minute epoxy if time is not important.
You will also need a small bottle of both“Thick” and“Thin”
instant CA adhesive.
Tools - Model assembly can be much easier if the proper
tools are used. Therefore,we have included in our checklist
to the left, a complete listing of all the tools we used to
assemble our prototype models. As you will notice, many
household tools can be utilized during construction.
Engine - The Thunder Tiger
PRO-60, PRO-90 are the ideal
engines for this airplane.These
quiet-running engines are easy
to start, require no special
break-in periods,are very easy
to maintain and will last for
years.
Muffler (P/NTTR9791) -
Most Pitts style mufflers will
fit this Rare Bear. However,
we recommend the use of
ThunderTiger custom-made
Rare Bear muffler with two
exhaust pipes that divert the
smoke into the two
concavities of the fuselage to obtain a more scale-like
apperance .This muffler fitsTT and OS .60~.90 engines.
ITEMSYOU MAY NEED
TTR1115 - Precision FuelerValve
TTR2174 - Built in Glow Plug ExtensionWire

4
PARTS DRAWINGS
AS6291 FRP Fuselage
AS6293 Horizontal Tail
AS6292 Main Wing
AS6301 Decals
No.3291 Aluminum
Spinner (3-blade)
Decal(B)
Left Wing(1)
CA Hinge(6) Air Cooling Inlet(2)
Right Wing(1)
3x15mm
Wood Screw(2)
FRP Fuselage(1) FRP Opening Cover(1)
CA Hinge(4)FRP Tube(1, S)
Rudder(1)
Al. Spinner(2-blade,1)
Back Plate(1)
FRP Tail Cover(1)
Right H.T.(1)
FRP Tube(1,L)
AS6296 Cowling
Cowling(1)
2x8mm
Washer Wood Screw(22)
Doubler(24)
CA Hinge(2) Rubber Band(1)
Plywood Parts(A) Plywood Parts(B) Plywood Parts(C)
FRP Wing Joiner Tube(1) Dowel(4)
Left H.T.(1)
Adaptor(1)
Spinner Bolt(1)
Bushing(1)
No.3290 Aluminum
Spinner (2-blade)
Al. Spinner(3-blade,1) Back Plate(1)
Adaptor(1) Spinner Bolt(1)
Bushing(1)
Decal(A)
2.3x12mm
Washer Wood Screw(6)
2.3x12mm
Washer Wood Screw(8)
3x16mm Flat Head Wood Screw(8)
Aileron Servo Case(L/1, R/1)
2x8mm
Washer Wood Screw(6)
OPTIONAL PARTS
AS6302 Plywood Parts

5
PARTS DRAWINGS
AS6294 Canopy & Cockpit
AS6298 Rudder Linkage Set
No.3258 Wheel
No.3012 Anti Vibration Engine Mount
No. 3015
Scale Tail Gear
PE0009 Hardware Set
No.3023 Retract
Servo Link
Throttle Pushrod(1)
Cockpit(1)
Clevis(2)
Hex Wrench(1)
Z-Bend Aileron Pushrod(2)
Brass Tube(4)
Wheel(2)
No. 3265 Fuel Tank
Hex Wrench(1) EZ Connector(1)
M2 Nut(1) 3x3mm Set Screw(1) M2 Washer(1)
AS6297 Elevator Linkage Set
Rudder
Torque Rod
Upper Door
Retainer B(2)
Collar(2)
Wheel Well
(L/1, R/1)
Retract Door
(L/1, R/1)
Elevator Torque Rod
(L/1, R/1) Threaded Pushrod(3)
Pushrod End Retainer(1)
Torque Rod Link(2)
Elevator Wood Pushrod(1)
Clevis(3) M2 Nut(3)
2x22mm
Screw(4)
3x3mm
Set Screw(8)
AS6295 Retract Decoration
5 x 40mm
Socket Screw(4)
Crank Weight (1)
90-degree Nipple (1) Tank (1)
Fuel Stopper (1)
Fuel Cap (1)
Silicone Tube(1) Straight Nipple (1)
480cc (16oz.)
3x3mm
Set Screw(1)
Retract Servo Link(2)
Pushrods(2)
E Clip(2)
Backplate(2)
Control Horn(2) M2 Nut(4)
AS6299 Pushrod Set AS6300 Control Horn
Blind Nut(2, Installed
in the Fuse.)
Canopy(1)
2x5mm Wood Screw(4)
Clevis(4) Tail Gear Collar(1)
Threaded End(4) M2 Nut(4)
Hinge(2)
Wire(1)
Steering Horn(1)
M2 Nut(2)
Lower Door Retainer(2)
Eng Mounting Screw
6/32 x 20mm(4)
4 x 20mm(4)
Blind Nut(4)Rubber(8)
T Washer(8)
Mounting Beam(2)
Pushrod Coupler(2)
Clevis(2)
Wheel Axel(2)
Pushrod(2)
Upper Door
Retainer A(2)
Tail Gear(1)
4mm x 20mm
Sink Head Screw
Spring (2)
E Clip(1)
Steering Shaft(1)
Steering Fork(1)
2.6mm x 26mm
Sink Head Screw(1)
Tire(1)
Tail Wheel(1)
Plastic Washer(2)
Wheel Spacer(1)
M2 Nut(2)
M2 Nut(2)
2x5mm Wood Screw(6)

6
PARTS CHECK LIST
Anti Vibration Engine Mount
Mounting Beam(2)
TWasher(8)
Rubber(8)
Blind Nut(4)
5 x 40mm Socket Screw(4)
HexWrench(1)
Eng Mounting Screw 6/32 x 20mm(4)
4x20mm(4)
Fuel Tank
SiliconeTube(1)
Straight Nipple(1)
90-degree Nipple(1)
CrankWeight(1)
Fuel Stopper(1)
Fuel Cap(1)
Tank(1)
Fuel Line
Retract Servo Link
Retract Servo Link(2)
Pushrods(2)
E Clip(2)
M2 Nut(2)
Control Horn
Control Horn(2)
Backplate(2)
M2 Nut(4)
2 x22mm Screw(4)
Retract Decoration
Retract Door(L/1,R/1)
WheelWell(L/1,R/1)
Collar(2)
M2 Nut(2)
Lower Door Retainer(2)
Pushrod Coupler(2)
Clevis(2)
3x3mm Set Screw(8)
Upper Door RetainerA(2)
Upper Door Retainer B(2)
WheelAxel(2)
Pushrod(2)
2x5mmWood Screw(6)
Wheel
Wheel(2)
Kit Contents:
FRP Fuselage
FRP Fuselage(1)
Rudder(1)
FRP Opening Cover(1)
FRPTail Cover(1)
Doubler(24)
CA Hinge(2)
2x8mmWasherWood Screw(22)
2.3x12mmWasherWood Screw(6)
Rubber Band(1)
Plywood
Plywood Parts(A)
Plywood Parts(B)
Plywood Parts(C)
Canopy & Cockpit
Canopy(1)
Cockpit(1)
2x5mmWood Screw(4)
Cowling
Cowling(1)
2x8mmWasherWood Screw(6)
Main Wing
LeftWing(1)
RightWing(1)
FRPWing JoinerTube(1)
Air Cooling Inlet(2)
CA Hinge(6)
Dowel(4)
Aileron Servo Case(L/1,R/1)
2.3x12mmWasherWood Screw(8)
3x15mmWood Screw(2)
3x8mm Flat HeadWood Screw(8)
Horizontal Tail
Right H.T.(1)
Left H.T.(1)
FRPTube(1,S)
FRPTube(1,L)
CA Hinge(4)
Aluminum Spinner (3-blade)
Al.Spinner(3-blade,1)
Backplate(1)
Bushing(1)
Adaptor(1)
Spinner Bolt(1)
Scale Tail Gear
Blind Nut(2)
Tail Gear(1)
4x20mm Flat Head Screw (2)
Spring (2)
E Clip(1)
Steering Shaft(1)
Steering Fork(1)
2.6mm x 26mm Flat Head Screw(1)
TailWheel(1)
Tire(1)
PlasticWasher(2)
Wheel Spacer(1)
Pushrod Set
Throttle Pushrod(1)
Z-BendAileron Pushrod(2)
Clevis(2)
M2 Nuts(2)
Elevator Linkage Set
ElevatorTorque Rod(L/1,R/1)
ElevatorWood Pushrod(1)
Pushrod End Retainer(1)
Torque Rod Link(2)
Clevis(3)
M2 Nut(3)
Threaded Pushrod(3)
Rudder Linkage Set
BrassTube(4)
Clevis(4)
Threaded End(4)
M2 Nut(4)
Tail Gear Collar(1)
Hinge(2)
Wire(1)
Steering Horn(1)
RudderTorque Rod(1)
3x3mm Set Screw(1)
Decals
Decal(A)
Decal(B)
EZ Connector
EZ Connector(1)
M2 Nut(1)
3x3mm Set Screw(1)
M2Wahser(1)

7
WING ASSEMBLY
Wing Assembly
1. CA the aileron in place,make sure the hinges are centered
then apply CA at both sides. Make sure aileron is firmly
glued.
2. Locate the aileron servo well then use a hobby knife to cut
an“X”.
3. Use a sealing iron to tack down the covering inside the
servo well.Trim the excess covering away.
4. Thread the servo extension wire through the wing panel.It
requires 24" long extension wire.
5. Locate the servo case / hatch cover; secure the aileron
servo as shown.
6. Install the straight servo horn, next plug the servo wire to
CH1, turn on the transmitter and receiver. Activate the
Flapron function, set your servo arm in the center neutral
position and make sure the direction is correct.
Secure the servo case in place with four 2.3x12mmWasher
Wood Screws at four corners where already has holes.Make
sure servo case is secured firmly and servo arm exit slot is
perpendicular to the trailing edge.

8
WING ASSEMBLY
7. Install the control horn and aileron pushrod with metal
clevis.Drill 5/64" (2mm) holes to secure the control horn.
8. Please note that the aileron is thick;carefully drill the holes
and make sure the backplate is flash with the hinge line at
the other side of Aileron. Secure the control horn in place
with 2x22mm machine screws and M2 nut.Trim away the
excess screw from the backplate. Repeat the same
procedure on the other wing and plug the other servo wire
to CH6 and set up Flapron.
9. Locate the plastic retract well;trim alone with the molded
line first and trial fit it in place.Use marker to draw cutting
lines as shown,you may use the other side of the retract as
guide to draw the line.
10.Remove the plastic retract well,place the retract gear with
the pushrod installed (metal clevis and M2 nut). Before
installing the Retract Gear,it may be wise to apply epoxy
to reinforce the mounting area. Shall you choose to install
another aired Retract Gear , then a modification of this
mounting area might be required. Check and tighten the
set screws on the retract leg.
11.Drill 5/64"(2mm) holes on the retract mount. Next secure
the retract in place with four 3x16mm Flat Head Wood
Screw.
12.Glue the plastic retract well in place with CA, trim the
plastic well at the wing root so the plastic well is leveled
with the root surface.

9
13.Install the wheel axle and secure it with 3x3mm set screw.
Make sure the position and angle are just right.Trim the
retract gear door and fit the retract well accordingly. Flats
should be ground on the landing gear legs for the setscrew
to prevent the wheel axle from rotating under load.
14. Trim the retract door in the upper retainers and glue one
retainer (bigger area) on the door then secure the other
side of the retainer at the strut coil with 2x5 mm wood
screw. Hint: Place the retainer in the strut coil with the
retract in the well, next apply CA on the retainer then
place the gear door on retainer and fit to the well
simultaneously.
15.Locate and trim the other retract door of the lower
retainer, which will be installed on the wheel axle.It may
be wise to sand the glue area to enhance the adhesion.
Install the wheel and secure the collar firmly with 3x3mm
set screw. Make sure the wheel rotates freely.
FUSELAGE
16.Glue the door on the lower retainer. You may secure the
door with the two 2x5mm furnished wood screws. Make
sure the retract works smoothly and the door fits in well
perfectly. The furnished rubber wheels are good size for
Rare Bear and we suggest to use them for static
demostration or sitting on the floor for an extended period
of time. However, for flying actions,the wheels are a way
too heavy, therefore, when flying, we would suggest
switching a pair of smaller or lighter foam wheels for
better retract performance.
17.Trim the air-cooling inlet and glue it in place as shown.
Repeat the same procedures on the other wing half.
Fuselage
18.Locate the two side framse, servo trays,servo tray doubler
and retract servo mount stripes. Glue them with Epoxy or
thick CA as shown on the photo.
NOTE: the slot cut to the very front at firewall area of Left
frame is shorter than Right frame.This is to make Firewall
with Right/ Down thrust angle.
FuelTank cutout on servo tray is not centened.Make sure the
cut out is at Left side.
L
R

10
19.Glue the fuselage center bulkhead in place. It will be
better to lightly sand the glue area then apply Epoxy or
thick CA and position it just tight to the fuselage. Do not
ever push it far enough back as it may damage the fuselage.
20.Place the side frame assembly into the fuselage. Go rear
first then slide the side frame assembly into the front
fuselage.Finally slide the side frame assembly through the
front bulkhead as shown.Make sure the notch is just right
out of the firewall. Glue the side frame on front bulkhead
with epoxy.
FUSELAGE
21.Glue the side frames on middle bulkhead with thick CA or
epoxy.
22. Sandwich the three firewalls together;note the cross laser
cut mark should be on the top and smallest one at the
bottom. Epoxy the firewall and reinforced plywood piece
on the side-frame and make sure the throttle pushrod hole
is at the bottom.It might need to bend the side frame and
push the firewall in place.
23.Epoxy the battery box; first glue the bottom of the box,
then the two sides. Note the two box sides should reach
the very front end of the bottom of the box.
L
R
L
R

11
TAIL FEATHERS
24.Next glue the front of the box,then the top. Lightly apply
epoxy on all firewalls area as well as the battery box so the
plywood could be fuel-proof. Just mix the epoxy with
some alcohol then brush on firewall.
25. Install the sideframe bulkhead as shown.
Tail Feathers
26. Remove the elevator from the horizontal tail;carefully use
hobby knife to cut away the covering as shown.
27.Locate the elevator torque rod;add lubricant oil to the first
and third hinges. You may sprayWD-40 on the hobby knife
then use the knife tip to contact the hinge and torque shaft
and the oil will go in. Cut away the covering of trailing
edge at the horizontal tail root where the torque rod is
going to be installed.
28.Locate two fiberglass tubes,do right tail half first and make
sure two FRP tube are well positioned in place.The short
tube is in the front(leading edge) and the long tube is in
the rear( trailing edge). The tubes are tight fit to the holes
of the tail half, do not push too hard when inserting the
tube or it may hurt the rib or doubler inside. If rib or
doubler is broken then it may cause serious crash. Make
sure the tubes are all the way in and go through the ribs
then stop by the rib doubler. You may wisely to make mark
on two tubes near the tail root. Install the tail on fuselage
then trial fit the left tail half.After you are satisfied with the
tail joint then remove the tails and tubes. Epoxy the two
tubes in right tail half at the mark you made.Wipe off the
excess epoxy from the tail root. Never trim the tubes as
they are just right in length for this assembly.
29. Sand the glue area of the fuselage, next mask-tape the
horizontal tail halves then epoxy the horizontal tail halves
in place as shown.When cured, install the two elevators;
the torque rod goes in the fuselage first then insert all
hinges in place then apply CA glue when satisfied. Thread
the torque link on the torque rod. You may install the
torque link first but you will have to enlarge the torque rod
hole on fuselage.
The photo shown is without planking.
Mark

12
RUDDER INSTALLATION
30.Locate the elevator pushrod parts as shown, epoxy the
plywood inside the wood rod at two ends with wires.
Thread the M2 nuts and clevises and make sure the whole
elevator pushrod has no free play.
31.Apply a small tube onto the clevis then connect the
elevator pushrod to the elevator torque rod links. A flat
head screwdriver will help snapping the clevises onto the
torque rod link.
32.Install elevator servo, note the servo orientation. Then
adjust the clevises to make sure elevators are level when
servo is in neuronal position.When satisfied, remove the
elevator pushrod temporarily and secure all M2 Nut and
Clevises firmly.
Rudder Installation
33.Install the rudder torque rod and glue the hinges in place
as shown.
34.CA the rudder on the vertical fin.

13
TAIL GEAR SECTION
37.Locate three plywood pieces, glue them together as
shown.
38. Secure the triple layers plywood on the tail gear mount
with 2.3x12mm washer wood screws as shown. Press the
blind mounting nuts in triple layers plywood which are for
mounting tail gear later.
39.Locate the tail brace and bulkhead, trial fit them in the
fuselage as well as the tail gear mount assembly. Mark the
position where they are going to be glued. Glue the
bulkhead and tail brace first as shown on the photo, then
proceed to install the elevator pushrod.
35.Locate the steering arm, trim the outer hole away as it is
too long to install in the tail.
36.Secure the steering arm on rudder torque rod with
3x3mm set screws. Then locate the bushing and press it
into the torque rod retaining plywood.Epoxy this plywood
piece in the tail with the rudder torque rod inserted.
Tail Gear Section Tail Bulkhead
Tail Brace

14
TAIL GEAR SECTION
40.Glue the tail gear mount and secure the mount on the tail
with four 2x8mm washer wood screws.
41.Locate the tail gear bag, and assemble the tail gear as
shown. Secure the tail gear assembly on the tail gear
mount with 4x20mm Flat Head machine Screws.
42.Locate the straight threaded end, brass tube, M2 nuts,
clevises and cable. First thread the M2 nut and clevis then
secure the M2 nut on clevis. Then route the cable through
the tube and make it a circle.
43. Next slide the cable through the threaded end then slide
to the tube again.
44.Make the other circle as shown.
45. Adjust the cable to make the circle as small as possible
then use the pliers to crimp the cable firmly.
46. Use masking tape to tape the cable on the servo tray,
thread the other end with clevis through the fuselage and
snap the clevis onto the steering arm.

15
47. Remove the masking tape and install the rudder servo. Do
the same procedure to install the links on both two cables.
The only thing you have to notice is trying to adjust the
wire so that the clevis will reach the servo horn outmost
hole just right.The length of Pull-Pull Wire (pin to pin of
the clevises) is around 32 1/8”(81.5cm) in length.
48. Install the tail gear spring, link one end to the threaded
rod and link the other end to the steering arm of the tail
gear. You may adjust the two-spring tension by threading
the threaded rod or clevis and making sure the tail gear is
in line with Rudder. Adjust the threaded end at the servo
end to make sure both rudder and tail gear are straight and
get better tension of the wires.
FUELTANK
49.Locate the bottom tail cover,position it in place then drill
six 1/16"(1.5mm) holes. Remove the cover, get six small
plywood doublers and glue them inside the fuselage at the
holes area. It might need to sand the doubler to adapt to
the curve surface.Drill the holes on doublers then secure
the bottom tail cover with 2x8mm washer wood screws.
FuelTank
50.Locate the fuel tank and its accessories. Assemble the tank
as shown.
51. Install the fuel tank in place, connect the fuel lines and
exit from the firewall for enough length to carb and
muffler.

16
ENGINE INSTALLATION
Engine Installation
52. Install the anti-vibration engine mount with 5x40 mm
socket screws. Place the Engine (Thunder Tiger PRO-90
Shown) in the Engine Mount then proceed to make mount
hole marks on the engine mount where drive washer is
6"(15.2cm) to the firewall.
53.Remove the engine and engine mount.Drill 3.4mm holes
on those marks then tap the hole with M4x0.7 thread tap.
Re-install the engine mount and use M4x20mm socket
screws to secure the engine in place. Locate the z bent
throttle pushrod,and install it onto the throttle lever.
54.Install the EZ connector on the throttle servo horn with
M2 washer and M2 nut. Afterwards, thread the throttle
pushrod through the EZ connect and secure the servo
horn on the servo. Adjust the servo with the radio on,
once satisfied with the result, proceed to secure the
throttle pushrod with a 3x3mm set screw.
55.Install the Rare Bear Exclusive Muffler (TTR9791), which
contains 2 angled exhaust pipes and aim to the concavity of
the fuselage for true scale looking.
Retract Servo Installation
56. Locate the four dowels,trial fit them on the wing root first,
glue them in place with epoxy or thick CA and make sure
the dowel is at least 1/4"(8mm) in length outside the wing
root. It might need to sand the edge of dowels to achieve a
snug fit to fuselage.
57. Locate the retract servo tray, glue the doubler as shown.
Then, install the retract servo on the servo tray.

17
RETRACT SERVO INSTALLATION
58.Secure the retract servo tray in place with four 2.3x8mm
washer wood screws.
59.Trail fit the two wing halves and join them with the
fiberglass tube.Insert the fiberglass tube into the fuselage,
center it,then thread the retract gear pushrod and aileron
servo wire to go through the fuselage which are pre-drill in
factory and slowly join the wing halves until it makes
contact the fuselage. Never push too hard as it may
damage the tube-stop rib inside the wing panel.
60. Locate the hole that is located at the bottom wing just
right above the fiberglass tube about 4 1/2" (11.3cm) away
from the wing root. Drill a 5/64" (2mm) hole through the
fiberglass tube of the main wing halves, and make sure
they are firmly close to the fuselage then secure 3x15mm
wood screws.
61.Locate the retract servo link,E clip,short pushrod,M2 nut
and coupler and assemble it as shown on the photos . If
Futaba Retract servo is used,then the servo link is installed
on the second hole of the horn.
62.Fine adjust the retract pushrod, secure the pushrod and
servo link with 3x3 mm set screws. Try switching on the
retract gear to make sure the retract gear works fine. You
may glue a piece of plywood at the retract servo tray area as
there is space between the side frame and fuselage. This is
to ensure that servo tray is firmly secured without any
movement when it is working.
63.Place a battery in the battery case;use double side tape to
secure it in the front of battery case.You can use the excess
plywood to make a block to hold battery in place. It may
need an extension wire to connect to the switch harness.
Approximately 200~250g of weight will be added in the
front of the battery case. See balance section in page 20
and add proper weights to get right CG.

18
COWLING INSTALLATION
64.Secure battery box cover with four 2x8mm washer wood
screws.
65.Connect all servo wires to the receiver;wrap the receiver
with foam to fully protect the receiver.Secure the receiver
in the fuselage under the fiberglass tube or use Velcro to
fix it in place.
66.Route the antenna along the fuselage and exit at the tail
gear opening. Use ScotchTape to tape it as shown.
67. Install the switch harness as shown.
Cowling Installation
68.Install the engine cowling;first glue the plywood doublers
inside the fuselage at the firewall where notches are
located. Trial fit the cowl in place and temporarily secure
it with mask tape. Drill 1/16" (1.5mm) at the place where
doublers are.Drill needle valve extension wire exit hole.
69. You may install precision Fueler (TTR1115) and built-in
glow plug extension wire (TTR2174) for easy fueling and
engine start,hence avoiding damaging the decal.
RX

19
COCKPIT INSTALLATION
70. File the cowling located near the vent of carburetor as
shown, the engine will get enough air and run smoother.
When satisfied, secure the cowling in place with six
2x8mm washer wood screws.
Cockpit Installation
71. Trial fit the upper fuselage cover,drill eight 1/16" (1.5mm)
holes and glue small plywood doublers inside the fuselage
at the holes area. Drill the doublers again and secure the
upper cover in place with 2x8mm washer wood screws.
72.Trim the cockpit and canopy; apply decal on the cockpit
and canopy as shown on the photo.
73. Trial fit the canopy on the cover,same procedure to glue
the plywood daubers and drill four 1/16"(1.5mm) holes.
Glue the cockpit in place and secure the canopy with four
2x5mm wood screws.You may install a pilot (Cap'n Eddie
ACE3019) to obtain a more realistic view.
74. Refer to the box label then apply all decals.The photos
shown is the decal at retract gear door.
75.Your Rare Bear is now ready to fly, carefully set up the
control throws and balance your plane well before your
first flight.Always examine everything before each and
every flight ;never take chances or rush fly your Rare Bear.

20
BALANCE
ControlThrows
The Rare Bear is very sensitive to elevator in flight, set the
control throws as followings for a starting point. After you
familar with its flying characteristics then these control throw
can be tailored to fit your flying style.
Center of Gravity
IMPORTANT- Do not attempt to fly your model before
completing this very important section. A model that is not
properly balanced will be unstable and could cause serious
damage and/or injury. Adjust the battery location or add
weight as needed to achieve level balance. Once you have
everything positioned as necessary,wrap your battery pack in
1/4" thick foam for protection.
Measure the C.G. while plane is dry. The balance
point is about 5 1/4" (13.3mm) behind the leading
edge where there is a panel line on fuselage.
5 1/4" (13.3cm)
1"
1"
3/8"
3/8"
5/8"
5/8"
1/4"
1/4"
3/8"
3/8"
Rudder
Aileron-Low Rate
Aileron-High Rate
Elevator-Low Rate
Elevator-High Rate
Locate A Good Flying Site
Generally, the best place to fly your model is at an AMA
(Academy of Model Aeronautics) chartered club field. Your
local hobby dealer can tell you if there is such a club in your
area or write the AMA for information. It is also a good idea
to join this organization before flying your model since they
offer liability insurance that can protect you if your model
causes damage or injury to others.
Academy of Model Aeronautics
5151 East Memorial DR
Muncie, IN 47302-9252
If there is not a chartered club field in your community, you
will need to find a large area free of obstructions, and has a
smooth grass or asphalt surface to be used as a runway. For
safety’s sake, it should be located well away from houses,
buildings, schools, power lines and airports. If you will be
flying within 6 miles of an airport,you should check with the
airport manager before flying your model.
A Note On Batteries
The batteries are the heart of your radio system. Make sure
you have fully charged batteries! With rechargeable batteries,
follow the manufacturers instructions to make sure the
batteries are fully charged,especially the first time the radio is
used.
We would recommend you use larger capacity(1000mAh) if
you use high performance servos as they will draw more
current than ordinary servos.
Congratulations
Now that you have completed the assembly of your Rare Bear
we feel that you have a very capable and good looking sports
scaleplane.We hope that you will enjoy this model and get
many hours of flying pleasure form its use. Thank you for
purchasing this Rare Bear from Thunder Tiger and we look
forward to providing you with other great R/C products in the
future.
Panel Line