Great Planes Z526 User Manual
SPECIFICATIONS
Wingspan:
58 in
[1475mm]
Weight:
Wing
Loading:
6 – 6.75 lb
[2695-3005 g]
22 – 24 oz/sq ft
[66 – 74 g/dm
Radio: 4-5 channel system
w/ 4 std servos (electric),
or 5 std servos (glow)
Engine: .46 –.55 cu in
[ 7.5 – 9cc] two-stroke,
.52 –.70 cu in
2
]
[8.5 – 11.5cc] four-stroke
]
Length:
52 in
[1320 mm]
Motor: RimFire .55 (42-60-480)
w/ APC 13 x 10 E-Prop
Wing Area: 633 sq in
[40.9 dm
2
WARRANTY
Great Planes® Model Manufacturing Co. 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 modification. In no case shall Great
Planes’ liability exceed the original cost of the purchased kit.
Further, Great Planes reserves the right to change or modify this
warranty without notice.
In that Great Planes has no control over the final assembly or
material used for final assembly, no liability shall be assumed nor
accepted for any damage resulting from the use by the user of
the final 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
READ THROUGH THIS MANUAL BEFORE STARTING CONSTRUCTION. IT CONTAINS IMPORTANT
INSTRUCTIONS AND WARNINGS CONCERNING THE ASSEMBLY AND USE OF THIS MODEL.
this kit immediately in new and unused condition to the
place of purchase.
To make a warranty claim send the defective part or item to
Hobby Services at the address below:
Hobby Services
3002 N. Apollo Dr. Suite 1
Champaign IL 61822 USA
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.
Champaign, Illinois
(217) 398-8970, Ext 5
airsupport@greatplanes.com
Entire Contents © Copyright 2009 GPMA1024 Mnl
TABLE OF CONTENTS
INTRODUCTION
INTRODUCTION ................................2
AMA .......................................2
SAFETY PRECAUTIONS .........................3
LITHIUM BATTERY HANDLING & USAGE ...........3
DECISIONS YOU MUST MAKE.....................3
Glow Engine Option & Required Parts.............3
Electric Motor Option & Required Parts ............4
Radio System Recommendations ................4
ADDITIONAL ITEMS REQUIRED ...................4
Adhesives & Building Supplies...................4
Optional Supplies and Tools.....................4
IMPORTANT BUILDING NOTES ....................5
COMMON ABBREVIATIONS ......................5
KIT INSPECTION................................5
KIT CONTENTS.................................6
ORDERING REPLACEMENT PARTS ................6
PREPARE FOR ASSEMBLY .......................7
ASSEMBLE THE WINGS..........................7
Aileron Servos & Control Horn Installation..........7
Main Landing Gear Installation .................11
Finish the Wings.............................12
ASSEMBLE THE FUSELAGE .....................13
Horizontal Stabilizer Installation.................13
Hinge the Elevator & Rudder ...................15
Servo, Pushrod & Control Horn Installation ........17
GLOW ENGINE INSTALLATION...................20
Fuel Tank Installation .........................21
Mount the Engine............................22
Rig the Throttle..............................23
ELECTRIC MOTOR INSTALLATION................25
Mount the Motor & ESC .......................25
Mount the Batteries ..........................27
FINAL ASSEMBLY .............................28
Radio Installation ............................28
Cowl Installation.............................30
Propeller & Spinner Installation .................31
Pilot Installation (Optional) .....................31
Apply the Decals ............................32
GET THE MODEL READY TO FLY .................33
Install & Connect the Motor Battery ..............33
Check the Control Directions ...................33
Set the Control Throws........................34
Balance the Model (C.G.)......................34
Balance the Model Laterally....................35
PREFLIGHT ...................................35
Identify Your Model ...........................35
Charge the Radio Batteries ....................36
Balance Propellers...........................36
Ground Check & Range Check .................36
ENGINE & MOTOR SAFETY PRECAUTIONS ........36
AMA SAFETY CODE............................37
CHECK LIST ..................................37
FLYING.......................................38
Fuel Mixture Adjustments .....................38
Takeoff ....................................38
Flight .....................................39
Landing ...................................39
Thank you for purchasing the Great Planes Zlin 526
Akrobat ARF! This sport scale model is patterned after the
original Zlin 526 Akrobat which was first seen at airshows
in the 1960’s. The Zlin, along with the famous de Havilland
Chipmunk, paved the road to the modern CAP, Extra, and
Edge aircraft era of today. Like its full-scale counterpart, the
Great Planes Zlin 526 is a good aerobatics trainer and is a
great 3rd airplane choice for a sport pilot who has mastered
the high-wing trainer and the low-wing sport plane.
If you’re a beginner who is a fan of scale airplanes, we
recommend starting with the Hobbico® NexStar™ 46 ARF
trainer (HCAA2025) and then moving on to the Great Planes
Cherokee GP/EP ARF (GPMA1033) sport scale low-wing
airplane before you try the Great Planes Zlin 526. When
you’re ready for another airplane, consider trying a kit. The
Great Planes CAP 232 40 Kit (GPMA0232) is an easy and
enjoyable build that will reward you with excellent flight
characteristics and the ability to perform high-performance
aerobatic maneuvers.
For the latest technical updates or manual corrections to the
Zlin 526 Akrobat visit the Great Planes web site at www.
greatplanes.com. Open the “Airplanes” link, and then select
the Zlin 526 Akrobat ARF. If there is new technical information
or changes to this model a “tech notice” box will appear in
the upper left corner of the page.
AMA
Academy of Model Aeronautics If you are not already a
member of the AMA, please join! The AMA is the governing
body of model aviation and membership provides liability
insurance coverage, protects modelers’ rights and interests
and is required to fly at most R/C sites.
Academy of Model Aeronautics
5151 East Memorial Drive
Muncie, IN 47302-9252
Tele. (800) 435-9262
Fax (765) 741-0057
Or via the Internet at:
http://www.modelaircraft.org
IMPORTANT!!! Two of the most important things you can
do to preserve the radio controlled aircraft hobby are to avoid
flying near full-scale aircraft and avoid flying near or over
groups of people.
2
PROTECT YOUR MODEL, YOURSELF
& OTHERS… FOLLOW THESE
IMPORTANT SAFETY PRECAUTIONS
LITHIUM BATTERY
HANDLING & USAGE
1. Your Zlin 526 Akrobat should not be considered a toy, but
rather a sophisticated, working model that functions very
much like a full-size airplane. Because of its performance
capabilities, the Zlin 526 Akrobat, if not assembled and
operated correctly, could possibly cause injury to yourself or
spectators and damage to property.
2. You must assemble the model according to the
instructions. Do not alter or modify the model, as doing so
may result in an unsafe or unflyable model. In a few cases
the instructions may differ slightly from the photos. In those
instances the written instructions should be considered as
correct.
3. You must take time to build straight, true and strong.
4. You must use an R/C radio system that is in good condition,
a correctly sized engine or motor, and other components as
specified in this instruction manual. All components must be
correctly installed so that the model operates correctly on
the ground and in the air. You must check the operation of the
model and all components before every flight.
5. If you are not an experienced pilot or have not flown
this type of model before, we recommend that you get the
assistance of an experienced pilot in your R/C club for
your first flights. If you’re not a member of a club, your local
hobby shop has information about clubs in your area whose
membership includes experienced pilots.
WARNING!! Read the entire instruction sheet included with
the battery. Failure to follow all instructions could cause
permanent damage to the battery and its surroundings, and
cause bodily harm!
• ONLY use a LiPo approved charger.
• NEVER charge in excess of 4.20V per cell.
• ONLY charge through the “charge” lead. NEVER
charge through the “discharge” lead.
• NEVER charge at currents greater than 1C.
• ALWAYS set charger’s output volts to match
battery volts.
• ALWAYS charge in a fireproof location.
• NEVER trickle charge.
• NEVER allow battery temperature to exceed 150°
F (65° C).
• NEVER disassemble or modify pack wiring in any
way or puncture cells.
• NEVER discharge below 3.0V per cell
• NEVER place on combustible materials or leave
unattended during charge or discharge.
• ALWAYS KEEP OUT OF REACH OF CHILDREN.
6. While this ARF has been flight tested to exceed normal use,
if the plane will be used for extremely high stress flying, such
as racing, or if an engine larger than one in the recommended
range is used, the modeler is responsible for taking steps to
reinforce the high stress points and/or substituting hardware
more suitable for the increased stress.
7. WARNING: The cowl is made of fiberglass, the fibers of
which may cause eye, skin and respiratory tract irritation.
Never blow into or on a part to remove fiberglass dust, as
the dust will blow back into your eyes. Always wear safety
goggles, a particle mask and rubber gloves when grinding,
drilling and sanding fiberglass parts. Vacuum the parts and
the work area thoroughly after working with fiberglass parts.
We, as the kit manufacturer, provide you with a top quality,
thoroughly tested kit and instructions, but ultimately the
quality and flyability of your finished model depends
on how you build it; therefore, we cannot in any way
guarantee the performance of your completed model,
and no representations are expressed or implied as to
the performance or safety of your completed model.
Remember: Take your time and follow the instructions to
end up with a well-built model that is straight and true.
DECISIONS YOU MUST MAKE
This is a partial list of items required to finish the Zlin
526 Akrobat that may require planning or decision
making before starting to build. Order numbers are
provided in parentheses.
Glow Engine Option & Required Parts
If you choose to equip your model with a glow engine, you
will need to purchase the items listed below. Either a twostroke or a four-stroke engine can be used. The glow engine
is mounted inverted.
3' [900mm] standard silicone fuel tubing
o
(GPMQ4131)
a suitable propeller per engine manufacturer’s
o
recommendation
®
O.S.
o
3
Needle Valve Extension kit (optional)
(OSMG7290)
Two-Stroke Option
O.S. 46 AX two-stroke engine (OSMG0547)
o
O.S. Muffler Extension #873 (for 46AX engine
o
using a standard muffler) (OSMG2578)
OR
J’Tec JT-601 In-Cowl universal inverted muffler
o
(scale muffler) (JTCG7015)
Four-Stroke Option
O.S. FL-70 RC four-stroke engine (OSMG0876)
o
Electric Motor Option & Required Parts
ElectriFly
o
Outrunner motor (GPMG4715)
ElectriFly Medium Motor Mount (GPMG1255)
o
ElectriFly Silver Series 60A Brushless ESC
o
(GPMM1850)
APC 13 x 10 E-Prop (APCQ4140)
o
(2) Great Planes ElectriFly 11.1V, 3200mAh 20C
o
LiPo BP Series (GPMP0727)
OR
(2) Great Planes ElectriFly 11.1V, 3350mAh 25C
o
LiPo Power Series (GPMP0541)
Deans
o
6" [150mm] servo extension (for ESC signal lead)
o
(HCAM2701)
PolyCharge4
o
Equinox
o
12 Volt DC power supply (HCAP0250) (optional)
o
RC Electronics Watt’s Up Watt Meter
o
(RELP0100) (optional)
™
RimFire™ .55 (42-60-480) Brushless
®
Series 2 Male Ultra® adapter (GPMM3143)
™
LiPo battery charger (GPMM3015)
™
1-5 cell LiPo cell balancer (GPMM3160)
Radio System Recommendations
4 channel radio system
o
(4) Futaba
o
(FUTM0004)
Futaba NR4J 4.8V 600mAh Receiver Battery
o
(FUTM1280)
(2) 12" [300mm] servo extension (HCAM2711 for
o
Futaba)
6" Y-harness (FUTM4130)
o
J-Series Switch w/ Charge Plug (FUTM4370)
o
Switch & Charge Jack Mounting Set (GPMM1000)
o
Servo Mounting Screws (Set of 10) (FUTM2550)
o
®
S3004 Standard Ball Bearing Servo
ADDITIONAL ITEMS REQUIRED
To finish this airplane you will need the following items.
Adhesives and Building Supplies
3/8" x 3" Heat Shrink Tubing (GPMM1060)
o
R/C foam rubber 1/4" [6mm] thick (HCAQ1000)
o
Drill bits: 1/16" [1.6mm], 5/64" [2mm], #48
o
1 oz. [30g] Medium Pro
o
1 oz. [30g] Thin Pro CA (GPMR6002)
o
1 oz. [30g] Thin Foam-Safe CA (HOTR1040)
o
CA applicator tips (HCAR3780)
o
CA debonder (GPMR6039)
o
Pro 30-minute epoxy (GPMR6047)
o
Epoxy brushes (6, GPMR8060)
o
Mixing sticks (50, GPMR8055)
o
Mixing cups (GPMR8056)
o
Threadlocker
o
(GPMR6060)
Panel Line Pen (TOPQ2510)
o
#64 rubber bands (1/4 lb [113g] box, HCAQ2020)
o
18" flexible steel rule (HCAR0460)
o
Hobbico Retractable Fabric Tape Measure
o
(HCAR0478)
6-32 tap and drill set (GPMR8102)
o
Tap handle (GPMR8120)
o
Pliers with wire cutter (HCAR0625)
o
Hobbico Heavy Duty Diagonal Cutter 7" (HCAR0627)
o
electric drill
o
Hobbico ball-end hex wrench set – metric
o
(HCAR0521)
Hobbico ball-end hex wrench set – SAE (HCAR0520)
o
(2) 1" [25mm] C-Clamps
o
Excel Small Clamp (EXLR5663)
o
Zona L-Square (ZONR3734)
o
Medium T-pins (100, HCAR5150)
o
Ea sy-To u ch
o
Sandpaper assortment
o
Masking tape (TOPR8018)
o
Electrical tape
o
Toothpicks, round
o
Denatured alcohol (for epoxy clean up)
o
™
thread-locking compound
™
Bar Sander 5.5" (GPMR6169)
™
CA+ (GPMR6008)
Optional Supplies and Tools
st
21
Century® sealing iron (COVR2700)
o
st
21
Century iron cover (COVR2702)
o
Rotary tool such as Dremel
o
Rotary tool reinforced cut-off wheel (GPMR8200)
o
Hobbico Z-bend pliers (HCAR2000)
o
4
®
Hobby Heat
o
Dead Center
o
(GPMR 8130 )
Ac c uThr o w
o
CG Machine
o
Precision Magnetic Prop Balancer (TOPQ5700)
o
Robart Super Stand II (ROBP1402)
o
Great Planes 1/5
o
(GPMQ9062), blue (GPMQ9063), or yellow
(GPMQ9064)
™
micro torch (HCAR0755)
™
Engine Mount Hole Locator
™
Deflection Gauge (GPMR2405)
™
(GPMR2400)
th
scale Civilian Pilot (red)
IMPORTANT BUILDING NOTES
There are several types of screws used in this kit:
•
instructions for application. Following are the colors used on
this model and order numbers for six foot rolls.
Jet White (TOPQ0204)
Royal Blue (TOPQ0221)
True Red (TOPQ0227)
Charcoal Metallic (TOPQ0407)
The stabilizer and wing incidences and engine thrust
•
angles have been factory-built into this model. However,
some technically-minded modelers may wish to check these
measurements anyway. To view this information visit the web
site at www.greatplanes.com and click on “Technical Data.”
Due to manufacturing tolerances which will have little or no
effect on the way your model will fly, please expect slight
deviations between your model and the published values.
Self-tapping or sheet metal screws
are designated by a number and a
length. For example, #6 x 3/4" [19mm].
Machine screws are designated by a
number, threads per inch, and a length.
For example, 4-40 x 3/4" [19mm].
Socket Head Cap Screws (SHCS)
are designated by a number, threads
per inch, and a length. For example,
4-40 x 3/4" [19mm]
When you see the term test fit in the instructions, it
•
means that you should first position the part on the assembly
without using any glue, then slightly modify or custom fit
the part as necessary for the best fit.
Whenever the term glue is written you should rely upon
•
your experience to decide what type of glue to use. When
a specific type of adhesive works best for that step, the
instructions will make a recommendation.
Whenever just epoxy is specified you may use either
•
30-minute (or 45-minute) epoxy or 6-minute epoxy. When
30-minute epoxy is specified it is highly recommended that
you use only 30-minute (or 45-minute) epoxy, because you
will need the working time and/or the additional strength.
Photos and sketches are placed before the step they
•
refer to. Frequently you can study photos in following steps
to get another view of the same parts.
COMMON ABBREVIATIONS
Stab = Horizontal Stabilizer
Fin = Vertical Stabilizer
LE = Leading Edge
TE = Trailing Edge
LG = Landing Gear
Ply = Plywood
" = Inches
mm = Millimeters
SHCS = Socket Head Cap Screw
ESC = Electronic Speed Control
LiPo = Lithium Polymer battery
3S = Three cells in series
mAh = Milliamp Hours (refers to the usable
capacity of a battery)
To convert inches to millimeters, multiply inches by 25.4
(25.4mm = 1")
KIT INSPECTION
Before starting to build, take an inventory of this kit to make
sure it is complete, and inspect the parts to make sure they
are of acceptable quality. If any parts are missing or are not of
acceptable quality, or if you need assistance with assembly,
contact Product Support. When reporting defective or
missing parts, use the part names exactly as they are written
in the Kit Contents list.
The Zlin 526 Akrobat is factory-covered with Top Flite®
•
MonoKote® film. Should repairs ever be required, MonoKote
can be patched with additional MonoKote purchased
separately. MonoKote is packaged in six-foot rolls, but
some hobby shops also sell it by the foot. If only a small
piece of MonoKote is needed for a minor patch, perhaps a
fellow modeler would give you some. MonoKote is applied
with a model airplane covering iron, but in an emergency a
regular iron could be used. A roll of MonoKote includes full
Great Planes Product Support
3002 N Apollo Drive, Suite 1
Champaign, IL 61822
Telephone: (217) 398-8970, ext. 5
Fax: (217) 398-7721
E-mail: airsupport@greatplanes.com
5
Order
Number
Description
REPLACEMENT PARTS LIST
How to
purchase
Instruction manual
Missing pieces
Full-size plans
Wing Set Zlin Akrobat
Fuselage Zlin Akrobat
Tail Set Zlin Akrobat
Landing Gear Zlin Akrobat
Cowl Zlin Akrobat
Canopy Hatch Zlin Akrobat
Decals Zlin Akrobat
Wing Tube Zlin Akrobat
GPMA3379
GPMA3380
GPMA3381
GPMA3382
GPMA3383
GPMA3384
GPMA3385
GPMA3386
Contact
Product Support
Not available
Contact your
hobby supplier
to purchase
these items
KIT CONTENTS
2
1
3
8
6
5
9
1 - Cowl
2 - Fuselage & Canopy/Hatch
3 - Rudder
4 - Horizontal Stabilizer w/Elevators
ORDERING REPLACEMENT PARTS
Replacement parts for the Great Planes Zlin 526 Akrobat
ARF are available using the order numbers in the
Replacement Parts List that follows. The fastest, most
economical service can be provided by your hobby dealer
or mail-order company.
7
4
10
5 - Engine Mount & Spinner
6 - Fuel Tank
9 - Wing Tube
10 - Wing Set
7 - Main Landing Gear
8 - Tail Gear
Be certain to specify the order number exactly as listed in
the Replacement Parts List. Payment by credit card or
personal check only; no C.O.D.
If additional assistance is required for any reason contact
Product Support by e-mail at productsupport@greatplanes.
com, or by telephone at (217) 398-8970.
To locate a hobby dealer, visit the Hobbico web site at www.
hobbico.com. Choose “Where to Buy” at the bottom of the
menu on the left side of the page. Follow the instructions
provided on the page to locate a U.S., Canadian or
International dealer.
Parts may also be ordered directly from Hobby Services by
calling (217) 398-0007, or via facsimile at (217) 398-7721,
but full retail prices and shipping and handling charges will
apply. Illinois and Nevada residents will also be charged
sales tax. If ordering via fax, include a Visa or MasterCard
number and expiration date for payment.
Mail parts orders and payments by personal check to:
Hobby Services
3002 N Apollo Drive, Suite 1
Champaign IL 61822
6
PREPARE FOR ASSEMBLY
1. Before you begin assembling your model, use a
o
covering iron set to a medium temperature (about 250°
F [121° C]) to tack down any loose or wrinkled covering.
Securely tack down the edges of trim and where seams
are present and around the aileron servo hatch covers. We
recommend using a Coverite™ (COVR2700) covering iron
with a sock (COVR2702).
ASSEMBLE THE WINGS
Aileron Servos & Control
Horn Installation
1. Locate the long servo arm that came with your servo.
o
For Futaba standard servos this is the arm that is already
installed on the servo. For other radio systems, please use
the arm that is at least 5/8" [15.9mm] long from the center
of the shaft to the outermost hole. Center two servos using
your radio. Remove the servo arm screw and reposition the
servo arm on the splined output shaft so that the arm is 90°
(perpendicular) to the servo case side. Clip off the unused
servo arms so that your servos look like those in the photo.
Install the servo arm screw.
2. Check the pre-hinged ailerons for secure attachment.
o
If necessary, add several drops of thin foam-safe CA to
each side of the hinges. Clean up any excess glue that runs
out of the hinge line using a paper towel. Allow the glue to
fully cure.
2. Use a #48 drill bit to drill the outermost servo arm hole
o
on both aileron servos. Install the servo mounting grommets.
Note: If you don’t have a numbered drill bit set, you may use
a hobby knife to carefully enlarge the servo arm hole. Work
slowly and keep checking the fit using the unthreaded end of
one of the 2-56 pushrods. Minimizing control slop now can
prevent poor flying characteristics (or even flutter) later.
7
3. Cut out three 1/2" x 1" [13mm x 25mm] pieces of thin
o o
card stock (not supplied). You may use construction paper,
an old cereal box, or a manila folder for this purpose. Lay the
servo on a flat surface with the arm hanging down over the
edge of your table. Locate two 12 x 8 x 20mm hardwood
blocks. Position the blocks under the servo mounting tabs
and place a piece of card stock in the locations shown.
Holding the blocks and servo in position, use a 1/16" [1.6mm]
drill to drill four holes for the servo mounting screws.
6. Repeat steps 3 through 5 for the other aileron servo.
7. Mix up a small batch of 30-minute epoxy and apply it to
o
the hardwood blocks. Glue each servo block to its servo bay
cover. Use small clamps to hold the hardwood blocks tightly
in position. Position the clamps so that they are clamping the
hardwood directly. The clamps shown here are Excel 3-1/2"
[89mm] plastic clamps (EXLR5663).
4. Install the four servo mounting screws that came
o o
with your servo. Remove the screws and harden each of
the screw holes with thin CA. This will create a durable
screw thread in the wood. Let the CA cure and reinstall
the screws.
5. With the hardwood blocks attached and each servo
o o
arm still centered, position your servo on an aileron servo
bay cover so that the servo arm is centered in the opening
and exiting the opening. Please note: If you are using Futaba
servos, there are two laser-etched rectangles on each servo
bay cover which will help you position your servo.
8. Attach a 12" [305mm] servo lead extension to each
o
aileron servo. Use a piece of 3/8" [9.5mm] diameter heat
shrink tubing (not supplied) to secure the connection.
Route the servo lead through each wing using the supplied
guide string.
9. Route the other end of the servo lead through the hole
o
in the top of each wing.
8
10. Find the pre-drilled holes at each corner of each servo
POSITION THE HORN
SO THAT THE HOLES
ARE DIRECTLY ABOVE
THE HINGE LINE.
o
bay cover. Use a T-pin to poke holes though the covering and
fit each servo bay cover to its wing. Use a 1/16" [1.6mm] drill
bit to drill four holes to attach the aileron servo bay covers
to the wing.
11. Locate eight #2 x 3/8" [9.5mm] sheet-metal screws
o
and eight #2 flat washers. Thread these into the holes you
drilled. Remove the screws and the servo bay covers and
harden the screw holes with thin CA.
13. Working with one wing now, make a mark using
o o
a felt-tip pen directly behind the aileron servo arm. Use a
builder’s triangle or builder’s square to ensure that you mark
directly behind the servo arm.
12. Reinstall the aileron servo bay covers using the #2
o
screws and washers.
14. Locate one nylon control horn. Discard the
o o
backing plate that is attached to it. Center the horn along
the line you made. Center the horn fore and aft so that the
holes are directly above the hinge line (see sketch above).
Use a 1/16" [1.6mm] drill to drill two 1/2" [13mm] deep holes
for the control horn. Note: Do not drill through the aileron
completely. You may wrap a piece of masking tape around
the drill bit 1/2" [13mm] from the tip to act as a drill stop.
9
15. Use two #2 x 1/2" [13mm] sheet-metal screws to
o o
attach the control horn to the aileron. Important: Remove
the screws and harden the holes with thin CA. Reinstall
the screws.
16. Repeat steps 13 through 15 for the other wing.
o
17. Locate the two 2-56 x 12" [305mm] threaded aileron
o
pushrods, two nylon clevises, and two silicone clevis retainers.
Slide a silicone retainer on each pushrod and thread each
clevis on so that at least 1/16" [1.6mm] of thread protrudes
past the clevis barrel.
19. Bend the pushrod 90° at the mark that you made.
o
Connect the pushrod to the outermost hole in the servo
arm. Install a nylon FasLink™ and cut the excess end of the
pushrod. If you use a Dremel tool with a cutoff wheel, remove
the nylon FasLink™ before cutting the wire to avoid melting
the plastic. Do this for both wings.
18. Center your aileron servos using your radio. Place
o
a piece of tape across the inboard edge of the ailerons to
hold them in the neutral position during this step. Attach
each pushrod to the outermost hole of each aileron control
horn. Extend the pushrod forward and line it up with the
servo arm hole. Mark the pushrod at the hole.
20. With your radio still on, adjust the length of each
o
pushrod until the control surface is neutral (zero control
throw). You may do this by removing the clevis from the
control horn and rotating it to adjust the length of the pushrod.
Move the ailerons through their full rate of travel and check
for any interference between the linkages and the servo bay
covers. If necessary, trim away the opening in the servo bay
cover. When you’re done, slide the silicone clevis retainer
into position.
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Main Landing Gear Installation
1. Locate the four 4mm wheel collars. Fit two wheel collars
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and a wheel onto the axles as shown. For each axle, mark
the position of the wheel collars on the axle. Use a fine-point
felt-tip pen and make the mark on the axle though the set
screw hole as shown. Remove the collars and the wheel.
4. Locate eight #4 x 1/2" [13mm] sheet-metal screws.
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Temporarily install the landing gear hold-down straps using
these screws. Remove the screws and the straps and
harden the holes with one drop thin CA per hole. Note:
Using more than one drop can melt the foam core of the
wing, so be careful.
2. File a 1/8" [3.2mm] wide flat on each axle for each
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wheel collar’s set screw. A metal file or a Dremel® tool with a
fiber-reinforced cutoff wheel attachment are recommended.
Install the wheels and wheel collars using a drop of threadlocking compound on the set screws. Apply a few drops of
light machine oil to the axles when you’re done.
3. Locate four flat nylon straps. Place these in the cutouts
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provided on the wing and use a 3/32" [2.4mm] drill to make
two holes for each strap using the strap as a guide.
5. Install a completed landing gear leg into each wing as
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shown. Install the landing gear hold-down straps and screws.
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Finish the Wings
1. For this section you will be working with epoxy. It is a
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good idea to have some denatured alcohol and paper towels
on hand to help you clean up. Keep in mind that epoxy must
be cleaned up before it cures. We also recommend that you
have your epoxy brushes, mixing sticks (or toothpicks), and
mixing cups on hand. You can mix small amounts of epoxy
on a scrap sheet of paper.
3. Locate the one 1-3/8" [35mm] long hardwood dowel.
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Test fit this in the root wing rib of each wing. If necessary,
sand the dowel until it fits. The dowel should protrude 5/8"
[16mm] from each root rib.
2. Locate the two 1-3/16" [30mm] long hardwood
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dowels. Test fit these into the holes provided in the leading
edge of each wing. Each dowel should protrude 5/8" [16mm]
from the LE of the wing. If a dowel is too tight, wrap a piece
of 150-grit sandpaper around it and rotate the dowel to sand
off material. Sand off a little at a time and recheck the fit.
4. Mix up a batch of 30-minute epoxy. Coat the inside
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of the two LE dowel holes and the inside of the left wing
anti rotation dowel hole. Coat each dowel with a thin layer of
epoxy. Install the dowels in their proper location. Make sure
that each dowel protrudes 5/8" [16mm]. Wipe up any excess
epoxy with some denatured alcohol and a paper towel. Also,
you may want to apply a thin coat of epoxy on the outer
portion of each LE dowel. Coat the dowel and wipe it off with
a dry paper towel. This leaves an ultra thin coat of epoxy and
makes the dowel more durable.
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