Black Horse Model RYAN BH 72 Owner's manual

SPECIFICATION
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Wingspan : 2,350 mm 92.52 in.
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Length : 1,730 mm 68.11 in.
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Weight : 06 kg 13.20 Lbs.
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Radio : 06 channels.
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Servo : 08 servos.
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Engine : 26cc gas.
Instruction Manual book
MadeinVietnam.

RYAN - Item code: BH72 . Instruction Manual
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This instruction manual is designed to help you build a great flying aeroplane. Please read this
manualthoroughlybeforestartingassemblyofyour RYAN.Usethepartslistingbelowtoidentifyall
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
proceduresdesigned tohelpthe newpiloton hiswaytosuccessful R/Cflight.They willalsobeable
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 air-
craftandtoprotect the table. Keep a couple of
jars or bowls handy to hold the small parts af-
ter you open the bag.
Pleasetrial fitallthe parts.Makesureyou have
the correct parts and that they fit and are
alignedproperly before gluing! This will assure
proper assembly. RYAN ARF is hand made
from natural materials, every plane is unique
andminoradjustments may have to bemade.
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 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.

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+ 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.
+Theglowplugclip mustbesecurely 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.
Donotstand in line with the sideofthe propel-
ler.
+ Make engine adjustments from behind the
propeller only. Do not reach around the spin-
ningpropeller.
SAFETY PRECAUTION.
REPLACEMENT LARGE PARTS
B. Wing panel.
C. Fuselage.
A.Cowling. D . Horizon stabilizer.
F. Aluminium wing dihedral brace.
E.Vertical stabilizer.
REPLACEMENT SMALL PARTS
G. Decal sheet.
 1) Install the rubber grommets and brass
eyelets onto the aileron servos.
1.INSTALLING THE AILERON SERVOS.
I.AILERON.
Bottom side
Aileron
Flap
C/Aglue
Bottom side
Aileron
1. Under carriage struts.
2. Oleo strut.
3. Plastic - enginemount.
4. Plastic parts for horizon stabilizer.
5. Plastic top fuselage.
6. Fuel tank.
7. Wing struts.
8. Wheels
9.Spinner.
10. Tail gear set.
11. Wheel spat.
12. Plastic fairing.
13. Plastic for pushrod.
14. Rudder push-pull cable.
A.
B. B.
C.
D.
E. F.
G.
12.
3.
6.
1. 2.
5. 4.
8.
7.
11. 11.
14.
13.
10.
9.

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Bottom side
C/Aglue
Bottom side
C/Aglue
Bottom side
C/Aglue
 2)Usinga modeling knife, remove the cov-
ering at possition show below.
Bottom side
C/Aglue Bottom side
C/Aglue
Bottom side
C/Aglue
Bottom side
Bottom side
Remove
covering

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 4)Drill 1,6mm pilot holesthrough the 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.
thread
Electric wire
2x10mm.
Bottom side
Secure
Bottom side
2.INSTALLING THE AILERON CONTROL HORN.
3mm x 40mm.
Nilon control clasp.
M3 lock nut.
Secure

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Aileroncontrolhorn
Bottom side
Removecovering
Repeat the procedure for the other wing
half.
Installing the aileron linkages as pictures
below.
3.INSTALLING THE AILERON
LINKAGES.
M3 M3 lock nut

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II. FLAP.
1.INSTALLING THE FLAP SERVOS.
Thread
Electricwire.
Flap
2.INSTALLING THE FLAP CONTROL HORN.
Remove
covering
3mm x 40mm.
Nilon control clasp.
M3 lock nut.
2x10mm.
C/Aglue.

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Installing the aileron linkages as pictures
below.
3. INSTALLING THE FLAP
LINKAGES.
Flap control
horn.
Repeat the procedure for the other wing
half.
Flap Aileron
M3 M3 lock nut
C/Aglue.

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PARTSREQUIRED
MAIN GEAR INSTALATION.
Remove covering
Markpoint
Secure
Markpoint
Secure
3 x 15mm
3 x 15mm
3 x 15mm
3 x 10mm
11.
8.
12.
1.
2.

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Cut
Markpoint

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Secure
Secure
C/Aglue.
3x 15mm

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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.
Removecovering
Drill a hole 3mm
diameter.
Secure
4x 35mm

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INSTALLING THE ENGINE MOUNT.
See pictures below:
Drilla hole
6mmdiameter.
 3) Carefully bend the second nylon tube
up at a 45 degree angle (using a cigarette
lighter). This tube will be the vent tube to the
muffler.
 4) Carefullybend the third nylontubedown
ata 45 degree angle(usingacigarettelighter).
This tubewillbeventtubetothefuelingvalve.
INSTALLING THE STOPPER ASSEMBLY
 1) The stopper has been pre-assembled
at the factory.
 2) Using a modeling knife, cut one length
ofsiliconfuel line (the length of silicon fuelline
iscalculated byhowtheweighted clunk should
restabout8mmaway from the rear of the tank
andmovefreelyinsidethetank). Connect one
FUEL TANK.
end of the line to the weighted clunk and the
otherendto the nylon pick up tube inthestop-
per.
When the stopper assembly is installed in the
tank, the top of the vent tube should rest just
belowthetop surface of the tank.Itshould not
touch the top of the tank.
4x 30mm
4x 30mm

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Vent tube Fuel pick- up tube
Fuelfill tube
 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. If flashing is present, make
sure none of it falls into the tank.
 6) When satisfied with the alignment of
thestopperassemblytightenthe 3mmx20mm
machine screw until the rubber stopper ex-
pandsand seals the tank opening.Donotover
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 front of the tank should justabout
touch the back of the firewall.
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, where it exits the fuselage behind the
enginemountingboxandtotherearofthetank
at the forward bulkhead.
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
Fueltank

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Fueltank
Drill a hole 4mm
diameter.
Secure
155mm

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Right side
Left side
Pushrod wire
Pushrod wire
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.
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.
INSTALLING THE THROTTLE PUSHROD.
Servo arm.
Connector.
Throttle servo
Throttle pushrod
 1. Slide the fiberglass cowl over the en-
gineandline up the back edge of the cowl with
the marks you made on the fuselage.
COWLING.

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2. While keeping the back edge of the
cowl flush with the marks, align the front of
thecowl withthecrankshaftof the engine. 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.
3. Slide the cowl back over the engine
andsecureitin place using four wood screws.
See picture below.
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
andfuelfiller valve.
Left side.
Left side
3 x 12mm
Rightside.
Machine screw.
Left side
INSTALLING THE SPINNER.
Installthe spinner backplate, propeller and
spinner cone. The spinner cone is held in
place using two 3mm x 12mm wood screws.
3 x 12mm
Trim and cut after
Right side

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Secure
 1. Install the rubber grommets and brass
colletsintothe elevator servo.Test fittheservo
into the servo tray.
 2. Mount the servo to the tray using the
mountingscrews provided with your radio sys-
tem.
ELEVATOR INSTALLATION.
C/Aglue
C/Aglue

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C/Aglue
 Horizontal stabilize installation .
See picture below.
HORIZONTALSTABILIZER, VESTICAL
INSTALLATION.
 1. Draw a center line onto the horizontal
stabilizer.Then put the horizontal into the fuse
large.
 2. Markthe shape of the vertical on the left
and right sides onto the horizontal stabilizer
using a felt-tip pen
Center line
C/Aglue.
 3. Remove the stabilizer. Using the lines
you just drew as a guide, carefully remove
the covering from between them using a
modelingknife.
When cutting through the covering to
remove it, cut with only enough pressure
to only cut through the covering it’s self.
Cutting into the balsa structure may
weaken it. This could lead to possible fail-
ure during flight
Removecovering.
 4. Using amodeling knife, cut away the
covering from the fuselage for the stabilizer
and remove it.
Check to mark sure the wing and stabi-
lizer are paralell. If they are not, lightly sand
theopeningin the fuselage for the stabilizer
until the stabilizer is paralell to the wing.

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 5. When you are sure that everything is
aligned correctly, mix up a generous amount
of 30 minute epoxy. Apply a thin layer to the
topand bottomofthestabilizer mounting area
and to the stabilizer mounting platform sides
in the fuselage. Slide the stabilizer in place
and re-align. Double check all of your meas-
urements one more time before the epoxy
cures. Remove any excess epoxy using a
papertowelandrubbing alcohol and hold the
stabilizerinplacewithT-pinsor maskingtape.
Epoxyglue
Epoxyglue
Epoxyglue
 6. After the epoxy has fully cured, re-
move
themaskingtapeorT-pins used to hold the
stabilizer in place and carefully inspect the
glue joints. Use more epoxy to fill in any
gaps that were not filled previously and
cleanup the excess using apaper towel and
rubbingalcohol.
 Vestical installation .
See picture below.
C/Aglue
C/Aglue