Carl Goldberg GPMA1966 User Manual

™

Wingspan: 60.5 in [1540 mm]
Wing Area: 667 sq in [43.0 dm2]
Weight: 5.5–6.5 lb [2490–2950 g]
Wing Loading: 19–22 oz/sq ft [58–67 g/dm2]
Length: 55 in [1395 mm]
Radio: 4-channel minimum with 4–5 servos and standard size receiver
Engine: .40–.55 cu in [6.5–9cc] two-stroke, .70 cu in [11.5cc] four-stroke,

RimFire™ .46 (42-60-800) brushless out-runner motor

WARRANTY

Carl Goldberg Products guarantees this kit to be free from defects in both material and workmanship at the date
of purchase. This warranty does not cover any component parts damaged by use or modifi cation. In no case shall
Carl Goldberg’s liability exceed the original cost of the purchased kit. Further, Carl Goldberg reserves the right
to change or modify this warranty without notice.

In that Carl Goldberg has no control over the fi nal assembly or material used for fi nal assembly, no liability shall be
assumed nor accepted for any damage resulting from the use by the user of the fi nal user-assembled product. By
the act of using the user-assembled product, the user accepts all resulting liability.

If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is
advised to return this kit immediately in new and unused condition to the place of purchase.

To make a warranty claim Hobby Services
send the defective part 3002 N. Apollo Dr., Suite 1
or item to Hobby Services Champaign, IL 61822 USA
at this address: [phone] Ext. 5

Include a letter stating your name, return shipping address, as much contact information as possible (daytime
telephone number, fax number, e-mail address), a detailed description of the problem and a photocopy of the
purchase receipt. Upon receipt of the package, the problem will be evaluated as quickly as possible.

READ THROUGH THIS MANUAL BEFORE STARTING CONSTRUCTION. IT CONTAINS IMPORTANT INSTRUCTIONS

AND WARNINGS CONCERNING THE ASSEMBLY AND USE OF THIS MODEL.

TABLE OF CONTENTS

THINGS TO CONSIDER

THINGS TO CONSIDER

Radio Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Power System Recommendations . . . . . . . . . . . . . . . . 2

Propeller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Batteries and Charger . . . . . . . . . . . . . . . . . . . . . . . . . 3

ADDITIONAL ITEMS REQUIRED . . . . . . . . . . . . . . . . . . . 3

Required Hardware and Accessories . . . . . . . . . . . . . 3

Adhesives and Building Supplies. . . . . . . . . . . . . . . . . 3

Optional Supplies and Tools. . . . . . . . . . . . . . . . . . . . . 3

Building Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

PREPARATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

BUILD THE WING PANELS . . . . . . . . . . . . . . . . . . . . . . . . 4

Install the Ailerons . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Install the Aileron Servos and Pushrods . . . . . . . . . . . 5

Join the Wing Panels . . . . . . . . . . . . . . . . . . . . . . . . . . 8

How To Cut Covering From Balsa . . . . . . . . . . . . . . . . 9

Install the Main Landing Gear . . . . . . . . . . . . . . . . . . . 9

BUILD THE FUSELAGE . . . . . . . . . . . . . . . . . . . . . . . . . 10

Install the Tail Surfaces . . . . . . . . . . . . . . . . . . . . . . . 10

Install the Tail Servos and Pushrods . . . . . . . . . . . . . 13

Install the Nose Gear . . . . . . . . . . . . . . . . . . . . . . . . . 14

Glow Engine Installation. . . . . . . . . . . . . . . . . . . . . . . 15

Brushless Motor Installation. . . . . . . . . . . . . . . . . . . . 18

FINISH THE MODEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Apply the decals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

GET THE MODEL READY TO FLY . . . . . . . . . . . . . . . . . 20

Install and Operate the Motor Battery

(Brushless Only) . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Battery Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Check the Control Directions . . . . . . . . . . . . . . . . . . . 21

Set the Control Throws. . . . . . . . . . . . . . . . . . . . . . . . 22

Balance the Model (C.G.). . . . . . . . . . . . . . . . . . . . . . 22

Balance the Model Laterally. . . . . . . . . . . . . . . . . . . . 23

FLYING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Fuel Mixture Adjustments . . . . . . . . . . . . . . . . . . . . . 23

Takeoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Flight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Landing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

This is a partial list of items required to fi nish the Tiger 2 ARF
that may require planning or decision making before starting
to build. Order numbers are provided in parentheses.

RADIO EQUIPMENT

The Tiger 2 ARF requires a minimum 4-channel radio system
with four 44 oz.-in. [3.2 kg-cm] minimum standard servos.
If you are installing a glow engine, an additional standard
servo is required for the throttle.

In addition, two 9" [229mm] servo extensions are required for
the aileron servos. A Y-harness is also required to connect
the aileron servos together into a single radio channel.

A charge jack receptacle is optional, but is useful for recharging
the receiver pack without removing the hatch or wing and
is shown in the assembly of the plane. Recommended part
numbers for the radio components are provided below:

Futaba® S3003 Servo Standard (FUTM0031)

Futaba 9" Servo Extension J (FUTM3910)

Futaba 6" Dual Servo Extension J (FUTM4130)

Ernst Charge Receptacle Futaba J FM (ERNM3001)

POWER SYSTEM RECOMMENDATIONS

The recommended engine/motor size for the Tiger 2 ARF is
a .40-.55 cu in [6.5-9cc] two-stroke engine, .70 cu in [11.5cc]
four-stroke engine, or a RimFire .46 (42-60-800) brushless
outrunner motor. Engine and motor order numbers are
provided below:

O.S.® .46 AX ABL w/Muffl er (OSMG0547)

Great Planes® RimFire .46 (42-60-800) Out-Runner

Brushless (GPMG4725)

Great Planes Brushless Motor Mount Medium Motors

(GPMG1255)

Ideal as a fi rst low-wing trainer and as a terrifi c everyday sport
plane, the Tiger 2 ARF combines docile fl ight characteristics
with the aptitude for super-smooth, exciting aerobatics. This
ARF has been designed to keep building time to a minimum.
With only fi nal assembly and radio and engine installation
required, you will soon be fl ying a tiger that “growls as you
grow”. The better you get, the more fun it gives you!

If using the recommended brushless motor, a 60A brushless
ESC is required:

Great Planes Silver Series 60A Brushless ESC High Volt

(GPMM1850)

PROPELLER

If you are installing a glow engine, choose a prop based
on the engine manufacturer’s recommendation. If you are
installing the recommended RimFire brushless motor, we
suggest an 11x5.5E APC propeller.

APC 11x5.5 Electric Propeller (APCQ1055)

2

BATTERIES AND CHARGER

ADHESIVES AND BUILDING SUPPLIES

For a brushless motor installation, a 5S battery confi guration
can be used as an economy setup for moderate power and
extended fl ight time. A 6S battery confi guration can be used
for better performance at a cost of fl ight time. For a 5S battery
confi guration, one 3200mAh 11.1V Lithium Polymer battery
pack and one 3200mAh 7.4V Lithium Polymer battery pack
will need to be connected in series. Two 3200mAh 11.1V
Lithium Polymer battery packs need to be connected in
series to create a 6S confi guration. Order numbers for the
battery packs and series connector are provided below:

Great Planes LiPo 7.4V 3200mAh 20C Discharge w/

Balance (GPMP0622)

Great Planes LiPo 3200mAh 11.1V 20C Discharge w/

Balance (GPMP0623)

Great Planes Series Deans U 2 to 1 Adapter

(GPMM3143)

A cell balancer is required for the LiPo battery packs
listed above:

Great Planes ElectriFly™ Equinox™ LiPo Cell Balancer

1-5 (GPMM3160)

A suitable charger is also required. The Great Planes
PolyCharge4™ is designed for LiPo packs only. However, it
is able to charge four LiPo packs simultaneously. The Great
Planes Triton2™ charger will only charge one pack at a time.
However, it is capable of charging NiCd, NiMH, LiPo, and Pb
acid batteries. Order numbers for both are provided below:

Great Planes PolyCharge4 DC Only 4 Output LiPo

Charger (GPMM3015)

OR

Great Planes ElectriFly Triton2 DC Comp Peak Charger

(GPMM3153)

ADDITIONAL ITEMS REQUIRED

REQUIRED HARDWARE AND ACCESSORIES

This is the list of hardware and accessories required
to finish the Tiger 2 ARF. Order numbers are provided
in parentheses:

R/C foam rubber 1/4" [6mm] (HCAQ1000)

3’ [900mm] standard silicone fuel tubing (GPMQ4131)

(Glow engine installation only)

This is the list of Adhesives and Building Supplies that are
required to fi nish the Tiger 2 ARF:

1/2 oz. [15g] Thin Pro™ CA (GPMR6001)
Pro 30-minute epoxy (GPMR6047)
Masking tape (TOPR8018)
Threadlocker thread locking cement (GPMR6060)
Denatured alcohol (for epoxy clean up)
Drill bits: 1/16" [1.6mm], 5/64" [2mm], 3/32" [2.4mm],

11/64" [4.4mm]
Dead Center™ Engine Mount Hole Locator (GPMR8130)
Small metal fi le
#1 Hobby knife (HCAR0105)
#11 blades (5-pack, HCAR0211)
Medium T-pins (100, HCAR5150)
Top Flite® MonoKote® sealing iron (TOPR2100)
Top Flite Hot Sock™ iron cover (TOPR2175)
220 grit sandpaper
Great Planes Velcro Hook & Loop 1x6" (2) (GPMQ4480)

(Brushless installation only)
Panel Line Pen (TOPQ2510)
DuraTrax® Servo Tape Wide 1x36" (DTXR1215)

Heat shrink tubing or electrical tape

OPTIONAL SUPPLIES AND TOOLS

Here is a list of optional tools that will help you build the Tiger
2 ARF:

1/2 oz. [15g] Thick Pro CA- (GPMR6013)
2 oz. [57g] spray CA activator (GPMR6035)
4 oz. [113g] aerosol CA activator (GPMR6034)
CA applicator tips (HCAR3780)
CA debonder (GPMR6039)
Pro 6-minute epoxy (GPMR6045)
Epoxy brushes 6, (GPMR8060)
Mixing sticks (GPMR8055)
Mixing cups (GPMR8056)
Diagonal Sprue Cutter 5" (HCAR0630)
Rotary tool such as Dremel
Rotary tool reinforced cut-off wheel (GPMR8200)
Servo horn drill (HCAR0698)
Hobby Heat™ Micro Torch II (HCAR0755)
Precision Magnetic Prop Balancer (TOPQ5700)
AccuThrow™ Defl ection Gauge (GPMR2405)
CG Machine™ (GPMR2400)
Hobbico Flexible 18" Ruler Stainless Steel (HCAR0460)
Top Flite MonoKote trim seal iron (TOPR2200)
Top Flite MonoKote heat gun (TOPR2000)
Hobbico Pin Vise 1/16 Collet w/6 Bits (HCAR0696)

3

Hobbico 7-Piece Ball Tip Hex L Wrench Metric

(HCAR0521)

Great Planes Clevis Installation Tool (GPMR8030)

BUILDING STAND

A building stand or cradle comes in handy during the build.
We use the Robart Super Stand II (ROBP1402) for all our
projects in R&D, and it can be seen in pictures throughout
this manual.

BUILD THE WING PANELS

INSTALL THE AILERONS

Do the right wing fi rst so your work matches the photos
the fi rst time through. You can do one wing at a time, or
work on them together.

PREPARATIONS

1. If you have not done so already, remove the major parts
of the kit from the box and inspect for damage. If any parts
are damaged or missing, contact Product Support.

2. Remove the tape and separate all the control surfaces.
Use a covering iron with a covering sock on high heat to
tighten the covering if necessary. Apply pressure over sheeted
areas to thoroughly bond the covering to the wood.

1. Drill a 3/32" [2.4mm] hole 1/2" [13mm] deep into the
center of each hinge slot in the aileron and wing panel. Trim
the covering away from each hinge slot to ensure that the
hinges will be properly glued in place.

2. Test fi t a CA hinge into each of the hinge slots in the
wing panel and aileron. If necessary, enlarge the slots with
a hobby knife. When satisfi ed with the fi t, insert a CA hinge
halfway into each hinge slot in the wing panel. Push a pin
through the middle of each hinge to keep them centered.

4

3. Join the aileron to the wing panel and remove

Cut off

unused

arms

Enlarge to

5/64" [2mm]

the pins from the hinges. Center the aileron on the wing.
Remove the pins and adjust the aileron so there is a small
gap between the LE of the aileron and the wing. The gap
should be small, just enough to see light through the gap or
to slip a piece of paper through.

INSTALL THE AILERON SERVOS AND PUSHRODS

1. Trim the covering from the aileron servo bay on the
underside of the wing panel.

4. Apply six drops of thin CA to the top and bottom of
each hinge without using accelerator. After the CA glue has
hardened, confi rm that the aileron is secure by pulling on it
and defl ecting it up and down.

5. Repeat steps 1– 4 for the other wing panel.

2. Cut three arms from a four-armed servo arm for the
aileron servo. Enlarge the outer hole of the remaining arm
with a 5/64" [2mm] drill bit.

3. Attach a 9" [229mm] servo extension to the aileron
servo and secure the connector using tape, heat shrink tubing
(not included), or a product designed specifi cally for securing
servo lead connections. Center the servo with your radio
system and install the servo arm to the servo perpendicular
to the servo case as shown. Be sure to reinstall the servo
arm screw into the servo.

5

5. Thread a nylon clevis 20 complete turns onto a

Hinge Line Hinge Line

CORRECT INCORRECT

6" [152mm] pushrod. Slide a silicone clevis retainer onto
the clevis and connect the clevis to the outer hole of a
control horn.

4. Use the string taped inside the aileron servo bay to
pull the servo lead through the wing ribs. Fit the servo into
the servo bay with the spline toward the LE of the wing. Drill
1/16" [1.6mm] holes through the mounting tabs on the servo
case into the wing. Thread a servo mounting screw (included
with the servo) into each hole and back it out. Apply a drop
of thin CA to each hole to harden the wood. When the CA
has dried, install the servo using the hardware supplied with
the servo.

6. Position the control horn onto the aileron using the
position of the servo arm as a guide. Align the holes in the
control horns directly over the aileron hinge line and mark
the location of the control horn mounting holes.

6

7. Drill 5/64" [2mm] holes at the marks you made

Servo Horn Pushrod Wire

90 Degree
Pushrod
Connector

through the aileron (drill perpendicular to the aileron chord
line). Apply a couple drops of thin CA glue to each hole to
harden the surrounding wood. When the glue has dried,
install the control horn onto the aileron using two 2 x 20mm
machine screws and a control horn backplate. The excess
length of screw protruding beyond the backplate can be
cut off.

8. Use tape or a small clamp to hold the aileron in
the neutral position. Make a mark on the pushrod where it
crosses the outer hole in the servo arm. Make a 90 degree
bend at the mark on the pushrod and cut off the excess
pushrod 1/4" [6mm] beyond the bend. Attach the pushrod to
the servo arm using a 90 degree pushrod connector. Thread
the clevis up or down on the pushrod as necessary to center
the aileron with the servo arm centered. When satisfi ed,
slide the silicone clevis retainer to the end of the clevis to
secure it.

9. Route the servo lead through the hole in the top of
the wing panel and tape it back and out of the way.

10. Repeat steps 1-9 for the other wing panel.

7

JOIN THE WING PANELS

1. Locate the three plywood wing joiner pieces. Glue the
three pieces together using epoxy. Note that the joiner has
a slight “V” shape that will give the wing a small amount of
dihedral when assembled. The point of the “V” shape is the
bottom of the joiner. Wipe away any excess epoxy with a
cloth dampened with denatured alcohol and use clamps to
hold the pieces together while the epoxy cures. Be sure that
the joiner pieces are glued so the edges are fl ush with each
other. Mark a centerline on the assembled wing joiner. The
centerline is used to confi rm that the wing joiner fi ts halfway
into each wing panel.

3. Use a mixing stick or something similar to coat the
inside of the wing joiner pockets of both wing panels with
30-minute epoxy. Thoroughly coat one half of the wing joiner
with 30-minute epoxy and insert it into the joiner pocket of
one wing panel with the bottom of the “V” shape pointing to
the underside of the wing. Coat the root ribs of both wing
panels and the protruding end of the wing joiner with epoxy.
Slide the wing panels together and use tape to hold them
tight while the epoxy cures. Wipe away any excess epoxy
with denatured alcohol.

2. Read all of step 3 and dry fi t the parts together to ensure
a proper fi t before gluing. Sand the wing joiner or root ribs if
necessary to achieve the correct fi t. The root ribs should join
together tightly with no gaps. When satisfi ed, glue the anti­rotation pin halfway into the hole of one of the wing panels
as shown.

4. Trim the covering from the holes in the plywood wing
bolt plate as shown. Position the wing bolt plate over the
wing bolt holes on the underside of the wing and use a felt­tip pen to trace around it.

8