Black Horse Model Extra 300S User manual

SPECIFICATION

MadeinVietnam.



Wingspan: 1,600 mm 63 in.



Length : 1,450 mm 55.5 in.



Weight : 3.2 Kg 7.04 Lbs.



Engine : 61 cu.in 2 stroke.

91 cu.in 4 stroke.



Radio : 4 channels.



Servo : 6 servos.

INSTRUCTIONMANUALBOOK

EXTRA 300S. Instruction Manual

This instruction manual is designed to help you build a great flying aeroplane. Please read this

manual thoroughly before starting assembly of your EXTRA 300S. 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,do not

unwrap the pieces until they are needed for

assembly. Cover your workbench with an old

towel or brown paper, both to protect the

aircraftand toprotect thetable. Keepa couple

of jars or bowls handy to hold the small parts

after you open the bag.

Pleasetrialfitalltheparts. Makesureyouhave

the correct parts and that they fit and are

alignedproperly beforegluing!Thiswillassure

proper assembly. EXTRA 300SARF is hand

made from natural materials, every plane is

unique and minor adjustments may have to

be made. However, you should find the fit

superior 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

following: paint thinner, C/A glue accelerator,

C/A glue debonder and acetone. Do not let

these chemicals 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.

EXTRA 300S. INSTRUCTION MANUAL

+ 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.

Do not stand in line with the side of the

propeller.

+ Make engine adjustments from behind the

propeller only. Do not reach around the

spinningpropeller.

SAFETY PRECAUTION.

 1. Install the rubber grommets and brass

eyelets onto the aileron servo.

4.Drill1,5mm pilotholes through theblock

of wood for each of the four mounting screws

providedwiththeservo.Installservointoaileron

servo tray as same as picture below.

 2. Using a modeling knife, remove the

covering servo tray.

INSTALLING THEAILERON SERVOS.

Bottom side.

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,

remove the masking tape and the servo lead

from the thread.

Electric wire.

Thread.

Remove the

covering.

Bottom of wing.

EXTRA 300S. Instruction Manual

Servo

cover.

Repeat the procedure for the other

wing half.

C/Aglue.

Trim andcut.

EXTRA 300S. INSTRUCTION MANUAL

3x40mm.

Nilon control clasp.

M3locknut.

ControlhornofAileron

AileronControlhorn

C/Aglue

Remove the

covering.

C/Aglue.

EXTRA 300S. Instruction Manual

Repeat the procedure for the other wing

half.

INSTALLING THE AILERON

LINKAGES.

1. Working with the aileron linkage for

now, thread one clevis onto one of the

threaded wires.

2. Attach the clevis to the outer hole in the

control horn. Install a silicone tube on the

clevis.

4. Locate one nylon servo arm, and using

wire cutters,remove all but one of the arms.

Using a 2mm drill bit, enlarge the third hole

outfromthecenterofthe armtoaccommodate

the aileron pushrod wire.

3. Plug the aileron servo into the receiver

andcentertheservo.Installthe servoarmonto

the servo. The servo arm should be

perpendicular to the servo and point toward

the middle of the wing.

5.Usingpliers,carefullymake a90 degree

bend down at the mark made. Cut off the

excess wire, leaving about 4mm beyond the

bend.

6.Insertthe 90degree bend down through

the hole in the servo arm. Install one nylon

snap keeper over the wire to secure it to the

arm. Installthe servoarm retainingscrew and

remove the masking tape from the aileron.

M2locknut.

M2clevis. Snapkeeper.

Repeat the procedure for the other

wing half.

Bend and

cut after

EXTRA 300S. INSTRUCTION MANUAL

INSTALLING THE ENGINE MOUNT.

See pictures below:

cut.

3.5x25mm.

4x25mm.

EXTRA 300S. Instruction Manual

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.

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.

6. When satisfied with the alignment of the

stopper assembly tighten the 3mm x 20mm

machine 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.

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.

Tie wrap.

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.

INSTALLING THE STOPPER ASSEMBLY

1.Thestopper hasbeen pre-assembledat

the factory.

2.Using amodeling knife,cut onelength of

siliconfuelline (thelength ofsilicon fuellineis

calculated by how the weighted clunk should

restabout 8mmaway fromtherearofthetank

andmove freelyinside thetank). Connectone

end of the line to the weighted clunk and the

other end to the nylon pick up tube in the

stopper.

3.Carefully bendthesecondnylontubeup

ata 45degreeangle (usingacigarettelighter).

This tube will be the vent tube to the muffler.

4.Carefully bendthethirdnylontube down

ata 45degreeangle (usingacigarettelighter).

This tubewill bevent tubeto thefuelingvalve.

FUEL TANK.

EXTRA 300S. INSTRUCTION MANUAL

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.

INSTALLING THE ENGINE.

Do not secure the tank into place

permanently until after balancing the

airplane. You may need to remove the tank

to mount the battery in the fuel tank

compartment.

Tie wrap.

Fueltank.

128mm.

Secure.

EXTRA 300S. Instruction Manual

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.

4. Installthemufflerandmufflerextension

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.

3. Slide the cowl back over the engine

andsecure itin placeusing fourwood screws.

See picture below.

COWLING.

1. Slide the fiberglass cowl over the en-

gine and line up the back edge of the cowl

with the marks you made on the fuselage.

Trimandcut.

Pushrod wire.

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