arf CORSAR Owner's manual

SPECIFICATION


Wingspan : 1,760 mm 69.29 in.


Length : 1,320 mm 51.97 in.


Weight : 4.4 kg 9.68 Lbs.


Radio : 06 channels.


Servo : 08 servos.


Engine : 91-120 - 4troke.
Instruction Manual book
MadeinVietnam.

CORSAIR 91- Item code: BH77. Instruction Manual.
2
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughly before starting assembly of your CORSAIR 91. Use the parts listing below to
identify all parts.
WARNING
Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it is
capable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOU
ASSUME ALL RISK & RESPONSIBILITY.
IfyouareinexperiencedwithbasicR/CflightwestronglyrecommendyoucontactyourR/Csupplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
proceduresdesignedtohelpthenew pilotonhiswaytosuccessfulR/C flight.Theywillalso beable
to advise on any insurance and safety regulations that may apply.
TOOLS & SUPPLIES NEEDED
Thick cyanoacrylate glue.
30 minute epoxy.
5 minute epoxy.
Hand or electric drill.
Assorted drill bits.
Modellingknife.
Straight edge ruler.
2mm ball driver.
Phillips head screwdriver.
220 grit sandpaper.
90° square or builder’s triangle.
Wire cutters.
Masking tape & T-pins.
Thread-lock.
Paper towels.
Some more parts.
HARDWAREPACK
COWLING.
Landinggear.....
Toavoid scratching yournew airplane,donot
unwrap the pieces until they are needed for
assembly. Cover your workbench with an old
towel or brown paper, both to protect the air-
craftand toprotect thetable.Keepacoupleof
jars or bowls handy to hold the small parts af-
ter you open the bag.
Pleasetrialfitalltheparts. Makesureyouhave
the correct parts and that they fit and are
alignedproperly beforegluing!Thiswillassure
proper assembly. CORSAIR 91 ARF is hand
made from natural materials, every plane is
unique and minor adjustments may have to
be made. However, you should find the fit su-
perior and assembly simple.
The painted and plastic parts used in this kit
are fuel proof. However, they are not tolerant
of many harsh chemicals including the follow-
ing:paintthinner,C/Aglueaccelerator,C/Aglue
debonderandacetone. Donotletthesechemi-
cals come in contact with the colors on the
covering and the plastic parts.
PARTS LISTING
FUSELAGE ASSEMBLY
(1) Fuselage.
WING ASSEMBLY
(1) Right wing half with pre-installed
aileron.
(1) Left wing half with pre-installed
aileron.
Tail section assembly
(1) Vertical stabilizer with pre-
installedrudder.
(1) Horizontal stabilizer with pre-
installedelevator halves.
SUGGESTION
NOTE.

CORSAIR 91- Item code: BH77. INSTRUCTION MANUAL.
3
Caution: this model is not a toy!
If you are a beginner to this type of powered
model,please askan experiencedmodelflyer
forhelp andsupport.Ifyouattempttooperate
themodel withoutknowingwhat youaredoing
you could easily injure yourself or somebody
else. Please keep your safety and well-being
in mind at all times.
Important: before you start construction
Evenifyou havealready built alarge number
ofRC modelspleaseread rightthrough these
instructions and check all the kit components
against the parts list. We have taken great
trouble to keep construction as simple as
possible, without making any compromises
in the area of safety.
Note regarding the film covering
Minor creases or bubbles may develop in the
film covering due to major fluctuations in
weather conditions (temperature, humidity
etc.); in rare cases you may even find a slight
warp in a component. These minor faults are
in the nature of film-covered built-up wooden
structures, and can easily be corrected using
a heat gun, as commonly used for modelling.
Creases: Blowwarm airoverthearea
and rub down with a soft
cloth.
Wing warp: Hold the panel twisted
gently in the opposite
direction to the warp, and
apply warm air to remove
the creases from the
covering.
Caution! do not heat the film more than is
absolutely necessary. If the air or the iron is
too hot, the film may melt and holes may be
formed.
This model is highly pre-fabricated and can
bebuilt inavery shorttime.However,the work
which you have to carry out is important and
must be done carefully. The model will only
be strong and fly well if you complete your
tasks competently - so please work slowly
and accurately.
When self-tapping screws have to be
screwed into wood, apply a little white
glue to prevent them shaking loose: just
squirt white glue into the hole and fit the
screw.
+ This is not a toy
+ Be sure that no other flyers are using your
radio frequency.
+ Do not smoke near fuel
+ Store fuel in a cool, dry place, away from
children and pets.
+ Wear safety glasses.
+Theglowplug clipmustbesecurely attached
to the glow plug.
+ Do not flip the propeller with your fingers.
+ Keep loose clothing and wires away from
thepropeller.
+ Do not start the engine if people are near.
Donot standinlinewiththesideof thepropel-
ler.
+ Make engine adjustments from behind the
propeller only. Do not reach around the spin-
ningpropeller.
SAFETY PRECAUTION.
REPLACEMENT SMALL PARTS
B. Wing panel.
C. Fuselage.
A.Cowling.
D . Horizon stabilizer.
F. Aluminium wing dihedral brace.
E. Vertical stabilizer
G. Decal sheets.
REPLACEMENT LARGE PARTS
D E
B
C
F
A
B
G

CORSAIR 91- Item code: BH77. Instruction Manual.
4
 1) Install the rubber grommets and brass
eyelets onto the aileron servos.
1.INSTALLING THE AILERON SERVOS.
I. AILERON.
10.
11.
7.
4.
1.
2.
8.
9.
3.
5.
6.
2. Tail gear.
1. Fuel tank.
4 . Strut sets.
6. Air cool plastic parts.
5. Wheels.
7.Antenna.
8. Bag with all of the connectors
and t-fittings as a set.
9. Air operated switch value.
10.Plywood cover air tank.
3. Plastic parts for pushrod.
11. Airline.
Top side
Aileron Flap
Flap
Flap
C/Aglue
C/Aglue
C/Aglue
C/Aglue
4.
Aileron
Flap Flap Flap
Bottom side

CORSAIR 91- Item code: BH77. INSTRUCTION MANUAL.
5
 2) Usinga modelingknife, removethe cov-
ering at possition show below.
Remove covering.
Secure
 4) Drill1,6mm pilotholes throughthe block
of wood for each of the four mounting screws
provided with the servo.
 3) Using the thread as a guide and using
masking tape, tape the servo lead to the end
of the thread: carefully pull the thread out.
When you have pulled the servo lead out, re-
move the masking tape and the servo lead
from the thread.
 5. Instal servo tray with aileron servo into
the wing as same as picture below.
2x10mm.
Secure
Electric wire
Thread

CORSAIR 91- Item code: BH77. Instruction Manual.
6
3mm x 40mm.
Nilon control clasp.
M3 lock nut.
2.INSTALLING THE AILERON CONTROL HORN.
Aileroncontrolhorn
Remove covering

CORSAIR 91- Item code: BH77. INSTRUCTION MANUAL.
7
Installing the aileron linkages as pictures
below.
Elevator
control horn
3.INSTALLING THE AILERON
LINKAGES.
C/Aglue
C/Aglue
2- INSTALLING THE FLAP SERVO .
2x10mm.
M3 M3 lock nut
80mm

CORSAIR 91- Item code: BH77. Instruction Manual.
8
Markpoint
Markpoint
Secure
Secure

CORSAIR 91- Item code: BH77. INSTRUCTION MANUAL.
9
INSTALLING THE FLAP CONTROL HORN.
Thread
Electric
wire Thread
2x10mm.
Nilon control
clasp.
Flap
Removecovering

CORSAIR 91- Item code: BH77. Instruction Manual.
10
Installing the aileron linkages as pictures
below.
INSTALLING THE FLAP
LINKAGES.
Control horn
of the flap
Repeat the procedure for the other wing
half.
INSTALLING AIR RETRACTABLE
LANDING GEAR.
M3 M3 lock nut
50mm

CORSAIR 91- Item code: BH77. INSTRUCTION MANUAL.
11
Secure
Secure

CORSAIR 91- Item code: BH77. Instruction Manual.
12
Locate the aluminium wing dihedral brace.
WINGATTACHMENT.
*** Test fit the aluminium tube dihedral brace
into each wing haft. The brace should slide in
easily. If not, use 220 grit sand around the
edges and ends of the brace until it fits prop-
erly.
Aileron
Flap Bottom
Top side
Remove
covering

CORSAIR 91- Item code: BH77. INSTRUCTION MANUAL.
13
Drill a hole 4mm
diameter
Secure
4 x 30mm
Drill a hole
3mm diameter
Secure
Top side
Bottom side
Bottom side

CORSAIR 91- Item code: BH77. Instruction Manual.
14
See pictures below:
INSTALLING THE ENGINE MOUNT.
4 X 30mm
4 X 30mm
Drill a hole
2mmdiameter
INSTALLING THE STOPPER ASSEMBLY
 1) The stopper has been pre-assembled
at the factory.
 2) Using a modeling knife, cut one length
ofsilicon fuelline(thelengthofsiliconfuel line
iscalculatedbyhowtheweightedclunkshould
restabout 8mmaway fromtherearofthetank
andmove freelyinside thetank). Connectone
end of the line to the weighted clunk and the
otherend tothenylonpickuptubein thestop-
per.
 3)Carefullybendthesecondnylon tubeup
ata 45degreeangle (usingacigarettelighter).
This tube will be the vent tube to the muffler.
 4)Carefullybendthethirdnylontubedown
ata 45degreeangle (usingacigarettelighter).
This tubewill bevent tubeto thefuelingvalve.
INSTALLING BATTERY AND
FUEL TANK .

CORSAIR 91- Item code: BH77. INSTRUCTION MANUAL.
15
When the stopper assembly is installed
in the tank, the top of the vent tube should
rest just below the top surface of the tank.
It should not touch the top of the tank.
Vent tube
Fuelfilltube
Fuel pick- up tube
 6) When satisfied with the alignment of
thestopperassemblytightenthe3mmx20mm
machine screw until the rubber stopper ex-
pandsand sealsthetank opening.Do notover
tighten the assembly as this could cause the
tank to split.
 7) Using a modeling knife, cut 3 lengths of
fuel line 150mm long. Connect 2 lines to the 2
vent tubes and 1 line to the fuel pickup tube in
the stopper.
 8) Feed three lines through the fuel tank
compartment and through the pre-drilled hole
in the firewall. Pull the lines out from behind
the engine, while guiding the fuel tank into
place. Push the fuel tank as far forward as
possible,the frontofthetankshould justabout
touch the back of the firewall.
Secure
Blow through one of the lines to ensure
the fuel lines have not become kinked inside
the fuel tank compartment. Air should flow
througheasily.
 9) To secure the fuel tank in place, apply a
bead of silicon sealer to the forward area of
thetank, whereit exitsthefuselage behindthe
enginemountingbox andtotherearofthetank
at the forward bulkhead.
 5) Test fit the stopper assembly into the
tank. It may be necessary to remove some of
the flashing around the tank opening using
amodeling knife. Ifflashing is present, make
sure none of it falls into the tank.
Do not secure the tank into place perma-
nently until after balancing the airplane.
You may need to remove the tank to mount
the battery in the fuel tank compartment.

CORSAIR 91- Item code: BH77. Instruction Manual.
16
INSTALLING THE ENGINE.
Locate the long piece of wire used for the
throttlepushrod. Oneendofthewire hasbeen
pre-bend in to a “Z” bend at the factory. This
“Z” bend should be inserted into the throttle
armofthe enginewhentheengine isfittedonto
theengine mount.Fittheengineto theengine
mount using the screws provided.
Mark poin
Drill a hole 4mm
diameter
Fueltank
Battery
130mm

CORSAIR 91- Item code: BH77. INSTRUCTION MANUAL.
17
Secure
Right side
4x 30mm
Left side
 1) Slide the fiberglass cowl over the en-
gineand lineup thebackedgeofthe cowlwith
the marks you made on the fuselage.
COWLING.
3) Slide the cowl back over the engine
andsecure itin placeusing fourwood screws.
See picture below.
2) While keeping the back edge of the
cowl flush with the marks, align the front of
thecowlwiththecrankshaftoftheengine. The
front of the cowl should be positioned so the
crankshaft is in nearly the middle of the cowl
opening. Hold the cowl firmly in place using
pieces of masking tape.

CORSAIR 91- Item code: BH77. Instruction Manual.
18
4) Installthe mufflerandmufflerextension
onto the engine and make the cutout in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor, muffler
andfuel fillervalve.
Left side
Right side
3 x 12mm
Left side
Trim and cut
Right side
Secure
 1. Install one adjustable metal connector
through the third hole out from the center of
one servo arm, enlarge the hole in the servo
arm using a 2mm drill bit to accommodate the
servo connector. Remove the excess mate-
rial from the arm.
INSTALLING THE THROTTLE PUSHROD

CORSAIR 91- Item code: BH77. INSTRUCTION MANUAL.
19
 1. Install the rubber grommets and brass
colletsintotheelevatorservo.Test fittheservo
into the servo tray.
 2. Mount the servo to the tray using the
mountingscrews providedwithyourradiosys-
tem.
ELEVATOR INSTALLATION.
SERVO INSTALLATION.
After installing the adjustable metal con-
nector apply a small drop of thin C/A to
the bottom nut. This will prevent the con-
nector from loosening during flight.
Connector.
Cut
Servo arm.
Throttle servo
Secure
servo throttle Elevator servo

CORSAIR 91- Item code: BH77. Instruction Manual.
20
C/Aglue
C/Aglue
C/Aglue
C/Aglue
 2 Using a modeling knife, cut away the
covering from the fuselage for the stabilizer
and remove it.
C/Aglue
C/Aglue
 1. Draw a center line onto the horizontal
stabilizer. Then slide the horizontal into the
fuselage.
 3. Mark theshape ofthe verticalon theleft
and right sides onto the horizontal stabilizer
using a left-tip pen.
Remove
covering
center line