Seagull Models Embraer EMB-312 Tucano T-27 Brazilian Air Force 85 span... User manual

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Specications:
Wingspan--------------- 85.0 in---------------- 215.0 cm.
Wing area--------------- 1097.4 sq.ins-------- 70.8 sq.dm.
Weight------------------- 17.9 lbs--------------- 8.1 kg.
Length------------------- 69.4 in---------------- 176.4 cm.
Engine/Motor size----- 30-38cc gasoline.
Radio--------------------- 9 channels with 10 servos.
ASSEMBLY MANUAL
Code : SEA 377

Embraer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc Instruction Manual.
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ank you for choosing the Embraer EMB-312 Tucano T-27 Brazilian Air Force
85” span 30-38cc ith 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. You will nd that most of the work has been done for you al-
ready. e motor mount has been tted and the hinges are pre-installed. Flying the Em-
braer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc is simply a joy.
is instruction manual is designed to help you build a great ying aeroplane. Please read
this manual throughly before starting assembly of your Embraer EMB-312 Tucano T-27
Brazilian Air Force 85” span 30-38cc Use the parts listing below to indentify all parts.
Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it is ca-
pable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE 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 on his way to successful R/C ight.
ey will also be able to advise on any insurance and safety regulations that may apply.
INTRODUCTION
WARNING
KIT CONTENTS
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KIT CONTENTS
SEA377 Embraer EMB-312
Tucano T-27 Brazilian Air Force 85”
span 30-38cc
1. Fuselage
2. Wing set (2)
3. Tail set (2)
4. Cockpit, Pilot and canopy (2)
5. Cowling
6. Wing tube
7. Fuel tank
8. Wheels
9. Pushrod set
10. Ep Motor box
11. Spinner
COCKPIT, PILOT AND CANOPY
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.
�30-38cc gasoline engine.
�Computer radio 9 channel with 10
servos.
�Glow plug to suit engine.
�Propeller to suit engine.
�Protective foam rubber for radio
system.
WING TIP BULBS
Please see below pictures.
1.
2.
3.
Two white lights for cowling and rud-
der, the green light for right wing tip, and
the red light for le wing tip. ey are
designed to operate on voltages 12 volts.
Connect four lights into switch circuit so
that optional the dierent ashes mode.
Lipo 2S-3S

Embraer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc Instruction Manual.
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6.
10.
7.
8.
9.
4.
5.
INSTALL THE AILERONS
Please see below pictures.
1.

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2.
4.
3.
Use a small piece of rough sandpaper to
scu the hinges for better epoxy adhesion.
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.
5.
6.
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
Epoxy
7.
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.

Embraer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc Instruction Manual.
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8.
9.
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.
Locate the aileron and ap control horns.
e taller control horn is used for the ailer-
ons, and the shorter horn for the aps.
Use sandpaper to scu the bottom of the
aileron and ap control horns. Use a paper
towel and isopropyl alcohol to remove any
oils or debris from the control horns.
Check the t of the control horns to the
aileron and ap. ey should rest ush
against the control surface as shown.
INSTALL THE AILERONS
CONTROL HORN
1.
2.
Ailerons control horn
3.
Place low-tack tape 1/32 inch (1mm)
from the control horn slot. is will pre-
vent epoxy from getting on the control
surface when the control horns are glued
in place.
4.

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Remove the control horns from the
control surfaces. Apply epoxy to the slot
in the aileron and ap. Make sure the
epoxy gets into the slot for a good bond
between the surfaces and control horn.
5.
Apply epoxy to the area of the control
horns that st into the slots. Use enough
epoxy so the control horns will be fully
bonded to the ed surfaces.
Before the epoxy fully cures, remove
the tape from around the control horn.
is will allow the epoxy to ow around
the control horn, creating a small let
between the control horn and surface for
a ished look and secure bond.
7.
6.
Epoxy
Epoxy
INSTALLING THE AILERON SERVOS
1.
Mininum servo spec.
Torque : 110 oz-in (7.9 kg-cm) @ 4.8V;
131 oz-in (9.4 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.

Embraer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc Instruction Manual.
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Use dental oss or heatshrunk tube to
secure the connection so they cannot be-
come unplugged.
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 us-
ing Phillips screwdriver and the screws
provided with the servo.
Apply 1-2 drops of thin C/A to each of
the mounting tabs. 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.

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8.
9.
10.
11.
Set the aileron hatch in place and use a
Phillips screw driver to install it with four
wood screws.
M3x10mm
12.
13.
AILERON PUSHROD INSTALLATION
Please see below pictures.
1.
2.
70mm
M3 clevis M3 lock nut

Embraer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc Instruction Manual.
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Please see below pictures.
INSTALLING THE FLAP PUSHROD
3.
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.
80mm
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.
6.
Attach the clevis to the ap servo arm.

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7.
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.
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 link-
age from changing length inside the wing.
10.
M3x10mm
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.
11.

Embraer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc Instruction Manual.
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13.
Trim the ap linkage cover using a hob-
by knife and hobby scissors.
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.
15.
INSTALLING LANDING GEAR
Locate items necessary to install Sprin
Landing Gear.
Install retractable landing gear at the
Wing.
1.
2.
C/A glue

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3.
4.
5.
6.
7.
9.
8.
10.
Epoxy
Epoxy

Embraer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc Instruction Manual.
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11.
12.
15.
14.
16.
17.13.
18.
Epoxy

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19.
20.
23.
22.
24.
25.21.
26.
C/A glue

Embraer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc Instruction Manual.
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27.
28.
31.
30.
32.
33.29.
34.
Collar
M3x4mm
Collar
M3x4mm

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35.
36.
39.
38.
40.
41.37.
42.
Loctite
M3x8mm

Embraer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc Instruction Manual.
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43.
2.
1.
1.
44.
45.
.
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.
INSTALLING THE FUSEKAGE SERVOS
Secure the servos with the screws pro-
vided with your radio system.
.
rottle servo
THROTTLE SERVO ARM
INSTALLATION
Install adjustable servo connector in the
servo arm as same as picture below:
rottle servo arm
Rudder servo
Elevator servo
Elevator servo
Elevator servo arm
Elevator servo arm Rudder servo arm

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1.
1.
2.
2.
3.
INSTALLING THE RECEIVER SWITCH
INSTALLING THE ENGINE SWITCH
Install the switch into the precut hole in
the side, in the fuselage.
3/32” Hole.
Switch
Trim and cut
Trim and cut
Switch
INSTALLING THE STOPPER
ASSEMBLY
Using a modeling knife, carefully cut
o the rear portion of one of the 3 nylon
tubes leaving 1/2” protruding from the
rear of the stopper. is will be the fuel
pick up tube.
Using a modeling knife, cut one length
of silicone fuel line. Connect one end of
the line to the weighted fuel pick up and
the other end to the nylon pick up tube.
1.
Carefully bend the second nylon tube up at
a 45º angle. is tube is the vent tube.
Test t the stopper assembly into the tank.
It may be necessary to remove some of the
ashing around the tank opening using a
modeling knife. If ashing is present, make
sure none falls into the tank.

Embraer EMB-312 Tucano T-27 Brazilian Air Force 85” span 30-38cc Instruction Manual.
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With the stopper assembly in place, the
weighted pick-up should rest away from the
rear of the tank and move freely inside the
tank. e top of the vent tube should rest just
below the top of the tank. It should not touch
the top of the tank.
When satised with the alignment of the
stopper assembly tighten the 3 x 20mm ma-
chine screw until the rubber stopper expands
and seals the tank opening. Do not over-
tighten the assembly as this could cause the
tank to split.
FUEL TANK INSTALLATION
1.
You should mark which tube is the vent
and which is the fuel pickup when you attach
fuel tubing to the tubes in the stopper. Once the
tank is installed inside the fuselage, it may be
dicult to determine which is which.
2.
3.
4.
Slide the fuel tank into the fuselage. Guide
the lines from the tank through the hole in
the ewall.
Use plywood template to hold in place the
fuel tank with C/A glue to secure the fuel-
tank inside the fuselage.
5.