Giant J3-90
Almost‐Ready‐to‐Fly
INSTRUCITION MANUAL
Specifications
Wingspan: 91 in (2306mm)
Length: 59in (1503mm)
Wing Area: 1185sq in (76.4sq dm)
Flying Weight (EP): Approx. 12lbs (5300g)
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Dear Customer,
Congratulations on your purchase of Giant J3-90 ARF from Value Hobby. We thank you for your generous
support, and hope you enjoy your new airplane.
At Value Hobby, we hope to offer competitive prices, good performance, and products that you can setup and
use with ease. That’s why we extensively researched and tested this airplane, and suggested all the products
necessary for you to setup properly. We understand that you have many choices when purchasing, and we are
grateful you choose to buy from us.
As vendors, one of the most gratifying things for us is to hear from our customers. We would welcome any
suggestion to help us improve. Please make us aware of any errors and imperfections in the airplane or the
instructions, or about the setup that we suggested. We hope you’ll find our setup suggestions to be helpful, and
enjoy flying your new airplane. Please feel free to contact us at (630) 948‐0947 or email us at
support@valuehobby.com
Disclaimer
By purchasing and/or building this model, user assumes ALL liability and risk involved with this product. This
model should be built and flown by an experienced pilot and only flown at AMA sanctioned sites.
Value Hobby guarantees this model to be free of defects in materials and workmanship at the date of purchase.
This warranty does not cover any parts damaged by use or modifications. In no way shall Value Hobby’s liability
exceed the original cost of the purchased model. Further, Value Hobby reserves the right to modify this
warranty without notice. Value Hobby has no control over the final stages of assembly or the material used for
the final assembly. No liability shall be assumed nor materials used for the final user‐assembled product. By the
act of using the final product the user accepts all resulting liability. Value Hobby, as a R/C product vendor,
provides a top quality airplane and instructions to complete the model. The quality and flight characteristics of
the finished model depend greatly on how it is built; we cannot guarantee the performance for the completed
model and representations are expressed or implied as to the performance of the completed model. 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.
Safety in Assembly
During assembly of this aircraft, you will be asked to use sharp knives and hobby adhesives. Please follow all
safety procedures recommended by the manufacturers of the products you use, and always follow these
important guidelines:
ALWAYS protect your eyes when working with adhesives, knives, or tools, especially power tools. Safety
glasses are the best way to protect your eyes.
ALWAYS protect your body, especially your hands and fingers when using adhesives, knives, or tools, especially
power tools. Do not cut toward exposed skin with hobby knives. Do not place hobby knives on tables or benches
where they can roll off or be knocked off.
ALWAYS have a first‐aid kit handy when working with adhesives, knives, or tools, especially power
tools. ALWAYS keep hobby equipment and supplies out of the reach of children.
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Safety in Flying
This is NOT a toy! It is a very high‐performance RC airplane capable of high speeds and extreme maneuvers. It
should only be operated by a competent pilot in a safe area with proper supervision.
ONLY fly your aircraft in a safe, open area, away from spectators and vehicles–and where it is legal to
fly. NEVER fly over an unsafe area, such as a road or street.
Never fly too close to yourself or spectators.
Never run your motor inside a house or building with the propeller attached – Remove the prop for safety.
Required Items
CA Glue – Thin and Thick
Epoxy glue
Hobby Knife
Small Phillips Screwdriver
Set Metric Allen Wrenches
Scissors
Small Pliers
Wire Cutters
Masking tape
Optional – Heat gun
Before Starting Assembly
Examination
Unpack your airplane and examine the components. Check for damage of any kind. If you see any
damage, please contact Value Hobby immediately.
Covering
Your airplane was packed in plastic at the factory without any wrinkles in the covering. You may notice some
wrinkles now; more likely, you will notice a few in a day or two or the first time you take the plane out to the
flying field. These wrinkles are the result of wood shrinkage and/or expansion. Balsa wood changes size and
shape slightly as it is exposed to varying humidity in the air. This is a natural property of balsa wood. As your
airplane adjusts to the weather in your part of the world, wrinkles may appear and disappear. Wrinkles may be
removed with the gentle application of heat to the covering material on your airplane. The best tool to use is a
hobby heat gun. Apply the heat gently: the covering material will shrink as you apply the heat, and this will
remove the wrinkles. BE CAREFUL! Too much heat applied too quickly can damage the covering, either by
causing it to pull away from the wood at seams and corners or even by melting it. The covering will shrink at low
temperature with patient application of heat.
Wrinkles in the covering DO NOT affect flight performance.
Remove the canopy before attempting to use heat on your covering! The canopy is made of
thermo‐activated plastic and WILL deform with the application of heat. Do not apply heat to the canopy.
If you need to clean your airplane, we recommend using a damp towel. The paint used on the canopy and cowl
is not safe for all cleaners. In particular, DO NOT use alcohol on these parts, it will remove the paint.
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RECOMMENDED RADIO EQUIPMENT
Product
SKU
Quantity
Radio
Flysky I6 6CH transmitter and receiver set
FLY-RC-4572
1
Servo
Towerpro MG996R standard servo
TWP-SV-0372
5(nitro)
4 (electric)
Servo
Extension
Universal Servo Extension 18-Inch (Futaba "J" and JR Compatible)
AMS-AC-0562
2
Y-Harness
Universal Servo Y-Harness 12-Inch (Futaba "J" and JR Compatible)
AMS-AC-0870
1
RECOMMENDED Engine SETUP
Product
SKU
Engine
2 stroke 90-108 nitro engine
4stroke 110-120 nitro engine
20-24cc gasoline engine
Battery
GForce 30c 2200mah 2s 6.6V LiFe Receiver LiPO
LYB--LP-3446
Prop
18 x 8 wooden prop
RECOMMENDED Motor SETUP
Product
SKU
Motor
5652-325kv motor (equivalent to 90 size glow engine)
ESC
Hobbywing FlyFun 100A OPTO ESC (No BEC)
HWG-SC-3538
Battery
GForce 30c 2200mah 2s 6.6V LiFe Receiver Battery
LYB--LP-3446
Battery
GForce Elite Series 60C 5000mAh 6S 22.2V LiPO
FLM-LP-4561
Prop
18 x 8 Electric Prop
OPTIONAL ACCESSORIES:
Product
SKU
Charger
GT Power C6 6S LiPO Charger
GTP-CH-1427
Thin CA Glue
Quickie Thin CA
VHB-AC-2097
Medium CA Glue
Quickie Medium CA
VHB-AC-2098
Watt Meter
GT Power 130A Watt Meter
GTP-AC-0591
Connector
T Connector Female
AMS-AC-1914
T Connector Male
AMS-AC-1913
LiPO Bag
LiPO charging bag
VHB-LP-0330
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1. Wings
2. Fuselage
3. Elevator
4. Rudder and fin
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Hatch
Cowling
M2.3x8mm self-tapping screw x 4
550cc fuel tank
350mm cable tie x 2
Main landing gear
M4x16mm socket head screw x 4
M4 lock nut x 4
M6 x 35mm axle x 2
Wheel collar x 4
Wheel x 2
Landing gear pant x 2
Front windscreen
Side window
PA2.3x8mm x 4
Wing strut x 2
Center strut support x 2
Red nylon strap x 4
White Nylon strap x 4
M3 x 10mm socket head screw x 6
M3 washer x 6
M2.5 x 12 socket head self-tapping screw x 16
Motor mount
M4 x 25mm socket head screw x 4
M4 x 25 screw x 4
M4 washer x 12
M4 locknut x 4
Steel cable x 1
Fitting x 8
Brass tube x 8
M3 x 16mm socket head screw x 3
M3 x12mm self-tapping socket head screw x 3
M3 locknut x 3
Wing joiner 19 x 800mm
Wing joiner 9 x 135mm
M6 x 25mm nylon screw x 2
Servo hatch x 2
Servo mounting block x 4
M2.3 x 8mm self-tapping screw
1.8 x 915mm elevator servo pushrod
1.8 x 915mm rudder servo pushrod
1.8 x 125mm aileron servo pushrod
1.5 x 385mm throttle servo pushrod
2.5mm elevator joiner
2.1mm easy connector x5
Adjustable control horn x 4
M2 x 16mm socket head screw x 6
M2 x 25mm socket head screw x 6
2mm clevis x 4
M2 x 10mm socket head screw x 4
M2 locknut x 4
Sticker x 1 set
Tail wheel assembly x 1 set
Section1. Aileron Installation
Step1. Remove the coverings as shown.
Step2. Insert four hinges into the wing.
Step3. Apply some thin CA to secure the hinge to
the wing.
Step4. Test fit the aileron to the wing through the
hinge.
Step5.Apply thin CA to secure the aileron to the
wing.
Step6. Repeat the previous step for the other wing
and aileron.
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