SG Models LEGEND HOBBY 86 A-I SKYRAIDER 35-60cc... User manual

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ASSEMBLY MANUAL
Code : SEA 348
Wing Span : Approx 86.5”
Length : Approx 67.3”
Wing Area : Approx 1055 square inches
Cowl Diameter : Approx 8-1/4”
Cowl Length : Approx 8’’ deep
Weight : Fully Equipped with All Rockets
Drop Tanks, Bomb, Pilot Figure, Smoke tank, Smoke pump 28.5 lbs-29.75 lbs
Engine : 35cc Gas-60cc Gas or Electric Equivalent
Radio 6-9 channels with 8-11 servos, 3 releases for drop tanks
ITEM CODE: SEA348

86’’ A-1 SKYRAIDER 35-60cc WARBIRD Instruction Manual.
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ank you for choosing the LEGEND HOBBY 86’’ A-1 SKYRAIDER 35-60cc WARBIRD
ARTF manufactured by SG MODELS. e 86’’ A-1 SKYRAIDER 35-60cc WARBIRD was
designed with the intermediate/advanced sport yer in mind. It is a semi scale airplane
which is easy to y and quick to assemble. e airframe is conventionally built using balsa,
plywood to make it stronger than the average ARTF, yet the design allows the aeroplane to
be kept light for its size. You will nd that most of the work has been done for you already.
e control surfaces have been pre-tted with hinges are ready to be nal glued into place.
Flying the LEGEND HOBBY 86’’ A-1 SKYRAIDER 35-60cc WARBIRD is simply a joy.
is instruction manual is designed to help you build a great ying aircra. Please read this
manual throughly a few time before starting assembly of your 86’’ A-1 SKYRAIDER 35-
60cc WARBIRD. Use the parts listing below to indentify all parts.
Please be aware that this model aircra is not a toy and if assembled or used incorrectly
it is capable of causing injury to people or property. WHEN YOU FLY THIS AIRCRAFT
YOU ASSUME ALL RISK & REPONSIBILITY.
If you are inexperienced with basic R/C ight we strongly recommend you contact your R/C
supplier and join your local R/C model Flying Club. R/C Model Flying Clubs oer a variety
of training procedures designed to help the new pilot follow a more enjoyable and successful
path to R/C ight. ey will also be able to advise on any insurance and safety regulations
that may apply.
INTRODUCTION
WARNING !
LEGEND HOBBY 86’’ A-1 SKYRAIDER KIT CONTENTS
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KIT CONTENTS
SEA348 86’’ A-1 SKYRAIDER 35-60cc
WARBIRD
1. Fuselage
2. Wing set (3 pcs)
3. Tail set (2 pcs)
4. Canopy
5. Cowling
6. Wing tube
7. landing gear Optional/Not Included
8. Fuel tank
9. Tail Gear Optional/Not Included
10. Pushrod set With Deluxe Model
11. Rocket Set With Deluxe Model
12. Drop Tanks/Bomb W/Deluxe Model
ADDITIONAL ITEMS REQUIRED
TOOLS & SUPPLIES NEEDED
in cyanoacrylate glue.
Medium cyanoacrylate glue.
30 minute epoxy.
5 minute epoxy.
Hand or electric drill.
Assorted drill bits.
Modelling knife.
Straight edge ruler.
2mm ball driver.
Phillips head screwdriver.
220 grit sandpaper.
90° square or builder’s triangle.
Wire cutters.
Masking tape & T-pins.
read-lock.
Paper towels.
�35-60cc gasoline engine.
�Computer radio 6-9 channel
with 8-11 servos.
�Glow plug to suit engine.
�Propeller to suit engine.
�Protective foam rubber for radio
system.
� Aircra shelves.
INSTALL THE AILERONS
1.
2.
3.
Epoxy.
Use a small piece of mough sandpaper
to scu the hinges for better epoxy adhe-
sion. Do this to all aileron hinges.
Remove the ailerons from the wing and
remove the hinges.
Apply epoxy to each hinge where it will
be inserted into the ailerons. Tip: Apply
some petroleum jelly to the metal pin
hinge area to keep epoxy from interfering
with smooth operation of hinge.
Please see below pictures.

86’’ A-1 SKYRAIDER 35-60cc WARBIRD Instruction Manual.
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INSTALL THE AILERONS
CONTROL HORN
Fiberglass control horn.
1.
5.
7.
6.
8.
4.
Insert all four hinges in the ailerons at
this time. Make sure hinges move up and
down in right direction and not side to
side !
Be sure to test the aileron hinges once
you insert them. Ensure that the hinge
pockets line up, and that the hinges move
freely before the epoxy dries.
Check the t of the aileron to the wing.
e top of the ailerons will align to the
top of the wing. Make sure movement is
smooth and bind free.
We prefer 30-minute epoxy to allow
enough working time during the hinge
installation.
Apply epoxy into each of the holes in the
ailerons using a spare piece of pushrod
wire or toothpick.
Make sure to use enough epoxy so it
securely adheres the hinge to the surfaces.
Do not use an excessive amount of epoxy
when gluing the hinges so that it expels
from the hinge area.
Epoxy.
Epoxy.

5
Ailerons control horn.
Epoxy.
Epoxy.
2.6.
3.
4.
5.
INSTALLING THE AILERON SERVOS
1.
Recommended Servo Spec Torque.
106.93 oz-in (7.7 kg-cm) @ 4.8V
133.31 oz-in (9.6 kg-cm) @ 6.0V
Because the size of servos dier, you
may need to adjust the size of the precut
opening in the mount. e notch in the
sides of the mount allow the servo lead to
pass through.
Place the servo between the mounting
blocks and space it from the hatch. Use a
pencil to mark the mounting hole loca-
tions on the blocks.

86’’ A-1 SKYRAIDER 35-60cc WARBIRD Instruction Manual.
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Use dental oss or heat shrink tubing
to secure the connection between the
servo and extension wire so they cannot
become unplugged accidentally.
C/A glue.
4.
5.
Use drill bit in a pin vise to drill the
mouting holes in the blocks.
Apply 2-3 drops of thin C/A to each of
the mounting holes. Allow the C/A to
cure without using accelerator.
1.5mm.
2.
3.
Secure the servo to the aileron hatch
using a proper driver and the screws
provided with the servo.
Apply 2-3 drops of thin C/A to each of
the mounting aileron hatch mounting
tabs in the wing. ***Allow the C/A to cure
without using accelerator.***
Remove the string from the wing at the
servo location and use the tape to attach it
to the servo extension lead. Pull the lead
through the wing and remove the string.
C/A glue.
6.
7.

7
8 .
9.
10.
Set the aileron hatch in place and use a
Phillips screw driver to install it with four
wood screws.
3x10mm.
11.
AILERON PUSHROD INSTALLATION
Please see below pictures.
3.
12.
1.
2.
65 mm.
M3 clevis. M3 lock nut.

86’’ A-1 SKYRAIDER 35-60cc WARBIRD Instruction Manual.
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Attach the ap servo to the ap servo
cover. Center the ap servo (or set the
values to 0 for both up and down) and in-
stall the servo arm perpendicular to the
servo centerline. e clevis will attach to
the arm 13/16 inches (21mm) from the
center of the arm.
3.
4.
Attach the ap linkage to the control
horn. Slide the clevis retainer over the
forks of the clevis.
1.
2.
100mm.
M3 clevis. M3 lock nut.
Use a pin vise and 3/32-inch (2mm)
drill bit to clear the paint from the ap
control horn.
5.
7.
6.
Route the servo lead for the ap servo
out at the root of the wing. Connect the
ap servo to the radio system. With the
radio system on, place the ap servo into
position.
Attach the clevis to the ap servo arm.
Please see below pictures.
INSTALLING THE FLAP PUSHROD

9
8.
Adjust the linkage so the ap is in the
mid-ap position. It may take a few tries
to properly adjust the linkage.
9.
Once adjusted, make sure all clevis re-
tainers are in position. Apply a drop of
threadlock near the clevis, then tighten
the nut against the clevis to keep the
linkage from changing length inside the
wing.
10.
3x10mm.
12.
Set the ap control at the transmitter to
the down ap position. Adjust the ap
travel at the transmitter until it matches
the control throws listed in this manual.
13.
Trim the ap linkage cover using a
hobby knife, hobby scissors and some
ne sandpaper as needed.
11.

86’’ A-1 SKYRAIDER 35-60cc WARBIRD Instruction Manual.
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WING ASSEMBLY
16.
14.
Fit the ap linkage cover into position.
Check the operation of the ap to make
sure the cover does not interfere with the
ap linkage.
Use canopy glue to attach the cover to
the wing. Use low-tack tape to keep the
cover in position until the adhesive fully
cures. Blue painters tape works well !
15.
Epoxy.
1.
3.
4.
2.
4x12mm
Please study images below.

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5.
7.
6.
INSTALLING LANDING GEAR
1.
4.
3.
2.
Retractable Gear Are Not Included.
Please study images below for gear
proper Landing gear installation:
Insert gear door control horntab into
hole.
Apply epoxy glue to parts.
Allow part to completely dry. One dried
completrly you may proceed to next srep.
Epoxy.

86’’ A-1 SKYRAIDER 35-60cc WARBIRD Instruction Manual.
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5.
10.
6.
9.
7.11.
8.
12.
Trim part to match image.
e nished assembly should look like
this.
Study images below. en place a bell-
crank on each end of carbon rod as shown.
Repeat eps above to make a door actua-
tion rod.
Put one wood ring on each end of the
carbn rod.
Make sure you space the wood ring so
that the bellcrank and anothe wood ring
will t on each of the carbon rods. en
epoxy into position.
Epoxy glue parts into place.
Epoxy.
Epoxy.

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17.
16.
18.
19.
13.
14.
15.
Finished actuation rod installation.
Completed Assemply.
Place the actuation rod into the wing.
Put wooden bearing pars in the wing
and CA or epoxy into place. Make sure
not to glue the actuation rod.
Epoxy glue parts together.
Epoxy.
Epoxy.

86’’ A-1 SKYRAIDER 35-60cc WARBIRD Instruction Manual.
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24.
22.
23.
25.
20.
21.
26.
27.
Install the gear door servo into the wing
cover as shown below in these illustrated
steps.
Finished gear door servo/control rod.
M3x50mm.

15
29.
28.
30.
31.
32.
33.
34.
35.
3x15mm.
3x6mm.
Install Main Retractable Landing Gear. Install aluminum pieces into the landing
gear struts as shown below.

86’’ A-1 SKYRAIDER 35-60cc WARBIRD Instruction Manual.
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36.
37.
38.
39.
Epoxy.
40.
43.
41.
26mm.
42.
Attach hinge to front gear fairing and
wing.
Epoxy.

17
44.
49.
48.
45.
50.
46.
47.
Install the cable to the cover and wing.
Epoxy.
51.

86’’ A-1 SKYRAIDER 35-60cc WARBIRD Instruction Manual.
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Continue Attaching the hinge to the
cover and wing.
59.
55.
52.56.
53.
57.
54.
58.
3x6mm.
Epoxy.

19
64.
60.
65.
61.
66.
62.
63.67.
M2x30mm.
Epoxy.
Epoxy.

86’’ A-1 SKYRAIDER 35-60cc WARBIRD Instruction Manual.
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68.
73.
70.
69.
74.
71.75.
72.
Epoxy.
Main Wheel installation.
Epoxy.