H-KING P 15B Mustang Berlin Express User manual

INSTRUCTION MANUAL

1
RADIO CONTROL MODEL
46 Class (2T Engine) 70 Class (4T Engine) Or Electric equivalent
AN ALL BALSA AND PLYWOOD CONSTRUCTED MODEL THAT IS ALMOST READY TO FLY
This H-King version includes a pair of servoless retracts with scale oleo's
SPECIFICATIONS
Wingspan 1580mm
Length
Electric Motor
Glow Engine
1180mm
800-900 Watt
.46 2-T / .70 4-T
Radio
6 channel with 7 servos for the I.C. version and 6 servos
and an ESC for the electric version.
WARNING! This radio controlled model is NOT a toy. If modified or flown carelessly it could go out of control and
cause serious injury or damage to property. Before flying your airplane make sure the flying area is spacious
enough, always fly it outdoors in safe areas and seek professional advice if you are inexperienced.

2
SAFETYINSTRUCTIONS
This plane is guaranteed to be free from defects of materials and workmanship at the date of
purchase. It does not cover any damage caused by use or modification. The warranty does not
extend beyond the product itself and is limited only to the original cost. With the act of using and
controlling this product the user accepts all liability for any damage caused with the final product. If
the buyer is not prepared to accept this liability then it can be returned new and unused to the
place of purchase for a refund.
1. Please read this manual carefully and follow the instructions before you use this
product.
2. This airplane is not a toy and has been designed for the more experienced pilot. If you
have only flown a trainer type model before then we recommend you fly a low wing sports
plane before flying this scale model.
3. Not recommended for children under 14 years old.
4. Please set up this plane according to the instructions and make sure you keep your
hands and other parts of your body out of the way of the rotating propeller at all times.
Failure to do so will result in damage to yourself and to the airplane.
5. Do not fly in thunderstorms, strong winds or wet weather.
6. Never fly R/C planes where there are overhead power lines, automobiles, airports,
railway lines or near a highway.
7. Never fly R/C planes where there are crowds of people or over organised games. This
airplane requires a very flat landing and take-off area that is clear of trees and other
obstacles. Remember safety is the responsibility of the pilot.
8. Do not attempt to catch the plane when you are flying it.
9. The operator will bear the full responsibility of flying and the proper operation and usage
of this model. We at HobbyKing will not be responsible for any liability or loss due to
improper use of this model.

3
1.5mm
A
B
!
CA
L/R
Assemble left and right
sides the same way.
X
Drill holes using the stated
size of drill
(in this case 1.5 mm Ø)
Use epoxy glue
Take particular care here Hatched-in areas:
remove covering
film carefully
Not included.
These parts must be
purchased separately
Check during assembly that these
parts move freely, without binding
Apply cyano glue
Low setting
SILICON
EPOXY A
EPOXY B
CA
GLUE
Epoxy Glue ( 5 minute type)
Silicon sealer Cyanoacrylate Glue
.60 ~.70 - 4 cycle
10.5x6 for .40 - 2 cycle engine
11x6 for .46 - 2 cycle engine
12x6 for .60 - 4 cycle engine
12x7 for .70 - 4 cycle engine
Silicone tube
.46 ~ .50 - 2 cycle
Epoxy Glue (30 minute type)
TOOLS REQUIRED
Phillip screw driver
Awl
Scissors
Wire cutters
(Purchase separately) Hex wrench
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Hobby knife
Needle nose pliers
Sander
Masking tape - Straight Edged Ruler - Pen or pencil - Rubbing alcohol - Drill and Assorted Drill Bits
Symbols used throughout this instruction manual, comprise:
(Purchase separately)
Minimum 6channel radio for
airplane with 6-7 servos
.Motor control x1 or ESC, Elevator
x1 .Rudder x1. Aileron x2
5055-430 Brushless Motor
or equivalent.
60-80 amp Brushless
Speed Controller
Li-Po Battery, 6S 4000mAH
Read through the manual before you begin, so you will have an overall idea of what to do.
CONVERSION TABLE
1.0mm = 3/64”
1.5mm = 1/16”
2.0mm = 5/64”
2.5mm = 3/32”
3.0mm = 1/8”
4.0mm = 5/32”
5.0mm = 13/64”
6.0mm = 15/64”
10mm = 13/32”
12mm = 15/32”
15mm = 19/32”
20mm = 51/64”
25mm = 1”
30mm = 1-3/16”
45mm = 1-51/64”
If exposed to direct sunlight and/or heat, wrinkles can appear. Storing the
model in a cool place will help make the wrinkles disappear. Otherwise, remove
any wrinkles in the covering film with a hair dryer, starting with
low temperature. You can seal the edges by using a hot iron.
REQUIRED FOR OPERATION (Purchase separately)
15x6 if using a 5055-430 brushless motor.
2 x extension leads
for the aileron
servos. 1 x
extension if doing
the I.C. version for
the battery pack.

4
-Switch on the radio (trims centered)
then mount the servo horns in the
tneutral position as shown.
-The servo horn should be
perpendicular to the servo.
YES NO
1-Cut away the covering on the bottom of one wing
where the aileron and flap servos go.
2-Connect the servo leads to the aileron and flap extension leads.
3-Install the servos to the servo mounts.
Do the same with the other wing.
1 - Wing Servos
Adhesive
tape
WING - BOTTOM VIEW
X
3mm set Screw
2 mm
Aileron pushrod
D=5/64”(2mm)
WING - BOTTOM VIEW
3 - Linkages
4- AILERONS - FLAPS EXTENSION LEADS
1
Aileron/Flap extension
lead exit hole.
Only cut away
the covering
WING - TOP VIEW
Keep the aileron and flap
extension leads in place using
adhesive tape.
2
X
1-Depending on the position of the linkage, determine the location of the aileron control horn.
The servo horn holes must be perfectly aligned with the control horns.
2-Mark the position of the of the 2 holes in the base of the control horn onto the aileron, drill
the 2 2mm holes.
3-Install the aileron control horn as shown.
..........2
2x30mm....4
..........4
Control horn Alignment
Do the same with the other wing..
WING - BOTTOM VIEW
2
- Control Horns
CA
Thin CA
2x30mm
....................2
The rectangular slot on the bottom
of the flap is pre-cut at the factory

AB
A
B
Center line
Bulldog clip
Nylon wing bolt
Rubber band
(both top
and bottom)
1- Using a pencil, mark the center of the wing joining brace.
2- Trial fit the wing joiner into one of the wing panels. It should insert smoothly up to the center line marked above.
3- Slide the other wing half onto the dihedral brace until the wing panels meet. If the fit is over tight, it may be necessary
to lightly sand the dihedral brace.
4- Check for the correct dihedral angle.
5- Mix up some 30 minute epoxy and apply a generous amount of epoxy into the wing joiner cavity of one wing half.
6- Coat one half of the dihedral brace with epoxy up to the center line. Install the epoxy-coated side of the dihedral brace
into the wing joiner cavity up to the center line, marking sure that the “V” of the dihedral brace is positioned correctly
7- Do the same way with the other wing half.
8- Carefully slide the wing halves together, ensuring that they are accurately aligned. Firmly press the two halves
together, allowing the excess epoxy to run out. Clean off the excess epoxy with a paper towel and kerosene.
9- Whilst the glue sets hold the panels in position with a bulldog clip at the front and rubber bands around the wing bolts
as shown.
IMPORTANT: Please do not clean off the excess epoxy on the wing with a strong solvent or pure alcohol, only use
kerosene otherwise you could take the color out of the covering.
5- JOINING THE WING
A
B
C
Retract servo tray
Retract servo
mount
Retract servo
mount
6- RETRACT SERVO TRAY
TOP VIEW
Cut away only the covering
TOP VIEW
5
Note: The H-King version is
supplied with servoless
retracts so these parts do
not require fitting.
RECEIVER
ELECTRIC RETRACT
LANDING GEAR
ON
OFF
GEAR
EXTENDED POSITION
RETRACTED POSITION
2mm
ELECTRIC RETRACT
LANDING GEAR
7- SERVOLESS ELECTRIC RETRACTS
Note:The H-King
version is supplied
with scale oleo's (not
shown)

Plastic air scoop
Plastic fairing
6x40 plastic bolt
Wing bolt mount
(Plywood)
Plastic M6 insert
WING
BOTTOM
Nylon wing bolt
BOTTOM VIEW
14- INSTALLATION OF THE WING (1)
15- INSTALLATION OF THE WING (2)
CA
Cut away the covering inside the line before
installing the air scoop and wing cover
Plastic air scoop
CA
Wing fairing
1- Using the ABS air scoop as a template, draw around the outside edge with a pencil and then remove it.
2- Using a sharp hobby knife cut away the covering just inside the line, please do not cut into the wood.
3- Glue the ABS air scoop into position using CA adhesive.
4- Repeat the above steps for the ABS wing fairing.
12mm
15/32”
6x40mm nylon bolt
.........2
BOTTOM VIEW
13-AIR SCOOP
Front of wing locator
8

! Note, the engine side thrust
is built into the firewall
! Align the mark on both mounts
with the mark on the fuselage
A
B
B’
B=B’
FRONT-VIEW
114mm
! Motor side thrust has
been built in at the
factory.
1.5
TOP-VIEW
5mm
13/64”
- Using a pencil or felt tipped pen, mark the firewall
where the 4 mounting holes are to be drilled.
- Remove the engine mount and drill a 13/64”
(5mm) hole through the firewall at each of the 4
marks.
- Attach the 4 blind nuts to the firewall as shown.
- Secure the engine mounts to the firewall with 4
4x25mm screws.
- Position the engine on to the engine mounts so the
distance from the prop hub to the firewall is
4.4”(114mm)
-
Mark the engine mounts where the 4 holes are to
be drilled.
Note: Mark the mounts through the engine
mounting flanges.
- Remove the engine and drill 1/8”(3mm) holes
through the beams at each of the 4 marks made
above.
- Reposition the engine on the engine mounting
beams, aligning it with the holes. Secure the engine
to the engine mount using 4 1/8x51/64”(3x25mm)
screws.
(4.4”)
IF MOUNTING A 2T ENGINE
FRONT-VIEW
17- ENGINE MOUNT
A
Remove the magnetic
hatch cover from the
fuselage.
With In Cowl silencer With STD silencer
THERE ARE 2 WAYS TO MOUNT A 4T ENGINE
FRONT-VIEW
You can mount the engine
horizontal, it is better protected
if you land the plane nose
down, this does make the fitting
of the cowl more difficult.
You can mount the engine
vertical which is nice and easy
for the cowl installation but the
rocker arm cover of the engine
may get damaged if the plane is
landed nose down.
...4
.................4
4x25mm screw
Blind-nut
3x20mm screw
1/8”(3mm) nut
.................4
...4
1/8x5-1/64”
5/32x1”
9

X
To muffler
Filler tube
To engine
3x25mm
screw
Rubber stopper
1
3x35 mm screw 4mm
2
-Use your motors aluminum motor mounting plate as a
template and mark the plywood motor mount where the 4
holes are to be drilled.
-Remove the aluminum motor mounting plate and drill a
1/8”(3mm) hole through the plywood at each of the marks.
Note: The aluminum mounting plate should be supplied
with your motor, if not you will need to purchase one
separately.
5x70mm.......4
5mm nut.......12
5mm washer...16
3mm screw/nut...4
3
Assemble the stopper and tubes as shown above. Insert the assembly clunk end first
into the fuel tank and firmly press the stopper into the neck of the tank. Align the pipes
as shown and tighten the stopper screw.
Ensure that the fuel tank clunk does not touch the rear of the tank.
Check the tank for leaks - block the vents and
blow into the feed, if in doubt submerse the
tank in a bowl of water, this will show up any
problems.
Blow
Water
Install the fuel tank in the tank bay, please ensure you
pad it out well with foam to keep the tank secure and
free from vibration.
18- FUEL TANK
19- ELECTRIC MOTOR
3mm
1
2
Firewall
114mm
(4.4”)
B’
B
B=B’
SIDE-VIEW
A
A=A’
A’ ! Motor side thrust is already
built into the firewall.
TOP-VIEW
4
10

1-
2-
Trial fit the vertical stabilizer into place in the rear of
the fuselage, check the alignment. When you
are satisfied with the alignment use a pencil to
draw around the right and left of the stabilizer
where it meets the fuselage.
Remove the vertical stabilizer from the fuselage.
Use a sharp hobby knife to carefully cut away the
covering inside the pencil lines.
AB
Cut away the covering on both
the right and lefthand side
C = C’
Apply epoxy glue
to both sides
CC’
A
B
AB
A = A’
B = B’
Ensure the horizontal stabilizer is securely
glued into place as a failure of this
assembly will result in a crash.
Cut away the covering on both the
top and bottom of the stabilizer
AA’
90O90O
Apply epoxy glue
to both sides
BB’
1-Trial fit the horizontal stabilizer into the slot in the fuselage.
Check the alignment, when you are satisfied with the
alignment use a pencil to draw around the top and
bottom of the stabilizer where it meets the fuselage.
2-Remove the horizontal stabilizer from the fuselage. Use a
sharp hobby knife to carefully cut away the covering inside the marked pencil lines.
3-Spread epoxy (30 minute) onto the top and bottom of the horizontal stabilizer
along the area where the covering has been removed.
4-Install the horizontal stabilizer into the fuselage and adjust the alignment as described in step 1
5-Wipe off any excess epoxy using a paper towel and kerosene.
Allow the epoxy to cure before proceeding to next step.
3-Apply 30 minute epoxy to the right, left and bottom of
the vertical stabilizer along the area where the covering
has been removed and to the fuselage where the
vertical stabilizer mounts.
4-Install the vertical stabilizer into the fuselage and
adjust the alignment as described in step 1.
5-Wipe off any excess epoxy using a paper towel and
kerosene.
Allow the epoxy to cure before proceeding to the next
step.
Ensure this joint is strong, if it fails in flight the plane will
crash.
* WARNING: When removing any covering from the airframe, please ensure that you secure the
cut edge with CA or a similar glue, this will ensure the covering remains tight.
* WARNING: When removing any covering from the airframe please ensure that you secure the cut edge with CA or a
similar glue, this will ensure the covering remains tight.
20- HORIZONTAL STABILIZER
Cut away only the covering on both
the right and lefthand side
21- VERTICAL STABILIZER
11

5 5
BOTTOM VIEW
3/8 in. (9.5mm)
Apply a thin layer of machine oil or petroleum jelly to only
the pivot point of the hinges on one elevator. Then push
the elevator and its hinges into the hinge slots in the trailing
edge of the horizontal stabilizer. Ensure you leave just a
minimal gap to avoid binding of the hinge.
When satisfied with the gap and alignment remove and
apply 5 minute epoxy the elevator hinges. Make sure to
apply a thin layer of epoxy to the top and bottom of the
hinges and to inside the hinge slots Slide the elevator
hinges back into the slots in the stabilizer leaving the small
gap as above. Repeat this process for the other elevator.
Hinge
Petroleum jelly
STABILIZER
Control horn
................3
2x12mm screw
..........6
A
B
Apply 5 min.
Epoxy to both the
top and bottom.
CA
6- Attach the tail wheel doors (D) in using CA glue.
1
3
4
5
2
5/64 in.(2mm) I.D collar
2x10mm
screw
...............1
Tailwheel wire
..........1
............1
2x3mm screw
............4
2x10mm screw
.................1
Tailwheel control-
horn
2mm I.D collar
6
1- Insert the tailwheel pushrod into the hole in the tailwheel control
horn as shown.
2- Install the tailwheel control horn to the tailwheel wire.
3- Install the tailwheel assembly as shown.
4-
5-
Secure the tailwheel control horn to the wire using a 5/64”(2mm) screw,
ensure a smooth non-binding movement.
Install the tail wheel hatch (H) using 4 off 5/64x25/64”(2x10mm) self
tapping screws.
H
D
BOTTOM VIEW
Please ensure the hinges are securely
glued into place, any failure will cause a
crash.
22- ELEVATOR
23- TAILWHEEL
Fit the control
horns as shown
12

X
Rudder push rod
Tail wheel push rod
4-49/64”
(120mm)
2-61/64”
(75mm)
Link the battery cable to an extension lead then
reposition the hatch and secure with CA glue.
Battery area
(if using a 4T engine)
Battery area
(if using a 2T engine)
1000-2500mah, flat Rx pack
BOTTOM VIEW
Hatch
Hatch
2-9/32”
(58mm) 2”(51mm)
2-61/64”(75mm)
FUSELAGE
BOTTOM
Elevator push rod
Elevator push rod
Tailwheel push rod
Rudder push rod
Throttle push rod
................2
....................3
2mm
Connector
Elev. servo
Rudder servo
Thrott. servo
X
Twin elevator pushrods
and rudder pushrod
D=5/64”(2mm)
Tail wheel pushrod
D=.050”(1.2mm)
3mm set Screw
2 mm
Elevator pushrod
ELEVATOR / RUDDER SERVO
X
3mm set Screw
2 mm
THROTTLE SERVO
Throttle pushrod
D=.050”(1.2mm)
BOTTOM VIEW
BOTTOM VIEW
24- SERVOS AND RX BATTERY
25- LINKAGES
Elevator push rod
Throttle push rod
If using a 4T engine.
Carefully cut a panel 2-9/32”(58mm) wide x 2-61/64” (75mm) long
through both the covering and the balsa wood 4-49/64" (120mm)
back from the servo compartment as shown. Remove this section
and this will reveal a built in battery box.
Install your Rx battery and ensure is it secure with rubber bands
or similar.
Install the rudder, elevator and
throttle servos and Rx switch if
using either 2T or 4T engine.
13

1~2mm
Transparent
plastic
Adhesive
tape
1- Attach a piece of transparent plastic to the side of the fuselage with
adhesive tape as shown.
2- Use a pencil or felt tipped pen to draw around the engine head
where it will exit the cowl. Cut around the lines drawn on the
transparent plastic to form a template.
3- Remove the engine and attach the cowl to the fuselage with a
distance from the firewall to the front of the cowl of 4-59/64”(125mm).
Re-attach the transparent plastic and then draw around the inside of
the cut-out with a pencil onto the cowl.
4- Remove the cowl from the fuselage and carefully cut the opening for
the engine head as marked above. Do the same for the hole for
needle-valve.
5- Refit the engine then install the cowl to the fuselage and secure in
place with 5 off 2.5x10mm self tapping screws.
125mm
Ruler
Cut out the opening in the
transparent plastic.
Cut out the opening in the
cowl for the cylinder head.
1.5mm
1/16”
1.5mm
1/16”
2.5x10mm self
tapping screw
2.5x10mm
3/32x25/64” self tapping screw
.................4
1/16”
Wing center section
DO NOT try to fly an out-of-balance model !
Note: If necessary, move the battery pack or add weight to either the
tail or nose until the correct balance is achieved.
13/32”(10mm)
13/32”(10mm)
1-23/64”(35 mm)
1-23/64”(35 mm)
RUDDER
15/64”( 6mm )
15/64”(
6mm )
AILERON
IMPORTANT: These control throws are recommended for your first flights. Once you have become accustomed to the handling
of the P51 you can then if need be make some adjustments to suit your particular flying style. Remember though that too much
control throw can make it very difficult to fly so please remember, "more is not always better".
ELEVATOR
26- COWLING
27- CENTER OF GRAVITY
5-13/64” (132mm)
28- CONTROL SURFACE
Take off 10mm (25/64”)
Landing 22mm (55/64”)
FLAP
Mark the cut out
with a pencil.
14

IMPORTANT: Please do not clean your model with pure alcohol, only use liquid soap with water or use glass cleaner
to clean the surface of your model.
Decal
All details are subject to
change without notice !
29- DECALS
1- Cut out the decals and apply them to the positions shown.
2- Do not peel the backing paper off all at once. Peel off one corner of
the backing and remove with scissors.
3- Place the decal in the correct position on the model and when
with this position firmly press the corner without backing
into place.
4- Then carefully peel back the rest of the backing while at the same time
pressing the rest of the decal into place with your finger.
5- If you are unfortunate enough to get an air bubble then prick the
center of the bubble only with a pin or point of a craft knife and
carefully push the air out.
6- With any curves carefully stretch the decal and apply a little heat so
that no creases occur, cut off any excess that may occur.
“Fuel Cap” Decal
Decal
Decal
Decal
VQA06BEX “Berlin Express””
Decal
Decal
DECAL P-51B “BERLIN EXPRESS”
P-51B “BERLIN EXPRESS” - VQ MODELS
15

16
1. If you have the simulator, we suggest that you can practice your skill using the
simulator before you fly this model, this will help when you come to fly the P51
for the first time.
2. Climb the plane out straight from the take-off area without turning to about 50
meters in height then throttle back to about 50-60% power whilst you get used
to the flying characteristics.
3. Initial turns should be gentle and be careful not to stall the plane with too much
elevator.
4. When taking off or landing the plane ensure this is always done into wind.
5. The first few landings should be flown without the use of flaps. Once you are
used to landing flapless then have a go at landing with full flap. The flaps will
create quite a bit of drag so watch your airspeed on the approach. You will need
to approach steeper when the flaps are down to maintain the airspeed and some
throttle/power will be required for the round out and flare.
6. Finally, do not fly the model over your head or behind you, always try to fly the
model in front of you.
Safety Precautions: