VQ Models BF-109 50CC User manual

BF-109 50CC
Specification:
Length: 2035mm(80＂)
Wing span: 2235mm(88＂)
Wing area: 79.7sq.dm(8.6sq.ft)
Wing loading: 125.5g/sq.dm(41.1oz/sq.ft)
Flying weight: 10kg(22 bs)
Radio: 6ch & 8servos
Engine: 50cc gasoline engine
SAFETY PRECAUTIONS
INSTRUCTION MANUAL
First-time builders should seek advice from people having building
experience.If misused or abused,it can cause serious bodily injury
and damage to property.
Fly only in open areas and preferably at a dedicated R/C flying site.
We suggest having a qualified instructor carefully inspect your
airplane before its first flight.Please carefully read and follow all
instructions included with this airplane,your radio control system
and any other components purchased separately.
(The people under 18 years old is forbidden from flying this model)
This R/C airplane is not a toy!

:50cc gas engine
5 in Spinner
6
96
6
6 channel radio for aiplane is highly recommended for this model.
9Optional parts: rubber wheel with metal hub,
oleo struts and retracts system.
Gasoline
We strongly recommend you use the thread lock for all the screws when you build your model.
Ǝ;

Top view
Side View
20mm
20mm
RUDDER
Adjustment.
20mm
20mm
30mm
AILERON
FLAP
AILERON
Side View
Adjustment. The centre of the Gravity.
FLAP
143mm
Top view
Position for
right diagram.
ELEVATOR
Side View
25mm
25mm
Adjustment.
85
84
83
86
16
Make sure hinges are
mounted in the same line.
1mm
Aileron
Tailing
edge
Make sure they are in
the right position while
installing.
6
Pin hinge(24x24mm)
6
Pin hinge(24x24mm)
8
2
2
2
2
2
2
2
Clevis
Clevis
Rod (2.5x300mm)
TP Screw (2.3x12mm)
Wooden Block(20x20x8mm)
Servo tray(68.5x56.5x2mm)
Screw (4x45mm)
2
Washer
Lock Nut (4mm )
2
Washer(4x14mm)
2
Collar (3mm)
Rod (2.5x300mm)
Washer
Washer(4x14mm)
Lock Nut (4mm )
Clevis
Clevis
Nut (3mm )
Collar (3mm)
Screw (3x10mm)
Screw (4x45mm)
2
2
Screw (4x45mm)
2
Washer
Lock Nut (4mm )
2
Washer(4x14mm)
2
Clevis
2
Clevis
2
2
Screw (3x10mm)
Nut (3mm )
2
Collar (3mm)
2
Rod (2.5x300mm)
Securely glue together. If coming off during flights, you 'll
lose control of your airplane which leads to accidents!
Install the servo as the illustration below
Install the nylon control horn and connect the linkage.
Apply instant type CA glue to aileron and pin hinge.
Keep some space about 1mm width between
aileron and trailing edge.
Assemble the aileron to main wing with instant type CA glue. Be careful
to ensure the moving parts of the hinges are able to move freely.
1
2
3
4
5
1
Accessory list for the coming installation steps.

6
Pin hinge(24x24mm)
Install the servo.
TP Screw (2.3x12mm)
1.5mm
4mm
Rod (2.5x300mm)
Clevis
Clevis
Lock Nut (4mm )
Screw (3x10mm)
Nut (3mm )
Screw (4x45mm)
Washer
Washer(4x14mm)
Securely glue together. If coming off during flighs, you 'll
lose control of your airplane which leads to accidents!
Secure the servo.Install the nylon control horn
and connect the linkage.
Apply instant type CA glue to flap and pin hinges.
Assemble the flap to main wing with instant type CA glue. Be careful
to ensure the moving parts of the hinges are able to move freely.
Flap
1mm
Make sure they are in
the right position while
installing.
Trailing
edge
Keep some space about 1mm width between
trailing edge and flap.
10
Pin hinge(24x24mm)
8
4
2
2
4
2
2
2
Clevis
Clevis
Rod (2.5x300mm)
TP Screw (2.3x12mm)
Wooden Block(20x20x8mm)
Servo tray(68.5x56.5x2mm)
Screw (4x55mm)
2
Washer
Lock Nut (4mm )
2
Washer(4x14mm)
2
Collar (3mm)
2
4
Screw (2x10mm)
Nut (2mm )
2
Copper joiner
2
Copper ball (2mm )
2
Rod (2x300mm)
7
6
8
9
10
2
Accessory list for the coming installation steps.
Wooden Block(43x28x26mm)
2
4
Collar (6mm)
Wheel (115mm)
Landing gear(6mm)
2
1
16
2
TP Screw (3x20mm )
Landing gear straps
12
Washer (3x6mm)
4
Wooden Block(25x15x13mm)
TP Screw (3x20mm)
Wooden Block
TP Screw (3x20mm)
Collar (6mm)
Wooden supporter
Collar (6mm)
Washer (3x6mm)
Assemble the wheel and gear door to landing gear.
Epoxy the landing gear to the wing steadily.
2
Plastic tube (5x50mm)
Epoxy the plastic tubes in the holes tightly.
5mm
114mm
Please notice the datas below when assemble
the drop tank.
20mm
5mm
Glue the drop tank mounts to the fuselage bottom
as illustration.
80 81
82
81
79
15
Accessory list for the coming installation steps.

Glue the exhaust to the fuselage as below.
Cut away the surplus parts of canopy and PVC parts
carefully along the shade line.
Epoxy plies under the canopy and assemble the
canopy to fuselage with screw.
6
TP Screw (2.3x8mm)
Ply (15x15x3mm) 6
1.5mm
TP Screw (2.3x8mm)
Epoxy the PVC part to the appropriate position in wing
carefully as below.
Epoxy the PVC part to the appropriate position in wing
carefully as below.
Assemble the cockpit to the fuselage and drill holes through the
ply and the wooden block in the fuselage and the cockpit,then
set blind nuts to the holes in the wooden block.
3mm
Washer (3x6mm) 2
2
Screw (3x15mm)
2
Blind Nut (3mm)
Washer (3x6mm) Blind Nut (3mm)
Screw (3x15mm)
220mm 8mm
76
14
73
77
74
78
75
Rod (2.5x300mm)
Washer
Lock Nut (4mm )
Clevis
Clevis
Nut (3mm )
Collar (3mm)
Screw (3x10mm)
Screw (4x55mm)
2
2
Screw (4x55mm)
2
Washer
Lock Nut (4mm )
2
Clevis
2
Clevis
2
2
Screw (3x10mm)
Nut (3mm )
2
Collar (3mm)
2
Rod (2.5x300mm)
Washer(4x14mm) 2
Washer(4x14mm)
TP Screw (2.3x12mm)
1.5mm
4mm
2
4
Screw (2x10mm)
Nut (2mm )
2
Copper joiner
2
Copper ball (2mm )
Rod (2x300mm)
Ball joint
2mm
Copper joiner
Screw (2x10mm)
Nut (2mm )
Copper ball (2mm )
Nut (2mm )
120mm
2
Rod (2x300mm)
2
Clevis
Assemble the copper joiner and link it to the
rod as illustration.
4
Pin hinge(24x24mm)
Flap
1mm
Make sure they are in
the right position while
installing.
Trailing
edge
Keep some space about 1mm width between
trailing edge and flap.
20mm
2mm
Install the nylon control horn and connect the linkage.
Secure the servo.Install the nylon control horn and
connect the linkage.
Rod (2.5x300mm)
Lock Nut (4mm )
Screw (3x10mm)
Nut (3mm )
Screw (4x55mm)
Washer
Clevis
Clevis
Apply instant type AB glue to flap and pin hinges. Drill a hole to appropriate position in the flap and
epoxy the copper joiner in it as illustration.
15o
12 15
14
11
16
13
3

6mm
2
Wood dowel (6x30mm)
Wooden Block(17x17x8mm)
2
15mm
Epoxy wooden block to the relevant position behind the
marked position and drill holes through the marked point
and epoxy the wooden dowel in them.
Open breaches to appropriate position in the cockpit
as illustration.
Epoxy the wooden block to the breaches.
According to the location wooden block drill holes
in the fuselage.
Trim breaches to relevant position in the fuselage for
assembling the cockpit.
Epoxy plies to relevant position below the breaches
in the fuselage.
220mm
15mm
4mm
2
Wooden Block (4mm)
6mm
220mm
15mm
4mm
ply(3mm)
2
69
71
70
68
72
67
13
LockNut(4mm)
Bushing (8X4mm)
Wooden Block
Note:rubber wheels oleo struts
and retracts are optional.
Retracts strut
Wheel (115mm)
Only use this flap
for landing.
Securely glue together. If coming off during flights, you 'll
lose control of your airplane which leads to accidents!
Linkage Stopper
Washer (2mm)
Nut (2mm)
Set screw (3x4mm)
1
1
1
1
Washer (2mm)
Set screw (3x4mm)
Washer (2mm)
Install the servo and assemble it to the mid wing.
10mm
10mm
4
Wood dowel (6x30mm)
2
Screw (6x50mm)
2
Wheel (115mm)(Not included)
8
TP Screw (3x20mm)(Not included)
2
Nut (4mm)(Not included)
2
Wooden Block(Not included)
2
Wooden Block(Not included)
2
Bushing (8X4mm)(Not included)
1
Rib template (2mm ply)
Mount the gear door and the wheel to the retract.
Cut off the surplus parts from the wheel wells along
the shaded line carefully.
1
Main wing joiner (25x750mm)
Drill a hole to relevant position in the mid wing
and epoxy the flap to the mid wing.
Link the rod to the servo in the mid wing.
1.5mm
18
19
20
21
4
17
Accessory list for the coming installation steps.

The servos installation finished sketch map.
Assemble the receiver and the battery to appropriate
in the fuselage.
Elevator servo
Rudder servo
Throttle servo
Receiver
Connect the electric retract & receiver as illustration below.
1.5mm
12
Ply(15x15x3mm)
12
TP Screw (2.3x8mm)
1
Canopy
2
Pvc part
2
Washer (3x6mm) 2
2
Screw (3x15mm)
2
Blind Nut (3mm)
4
Ply (17x17x8mm)
2
Plastic tube(5x50mm)
2
Wood dowel (6x30mm)
ply(3mm)
2
1
Location wooden Block (2mm)
2
Wooden Block (9mm)
1
Drop tank
PVC
2
PVC
2
PVC
1
PVC
According to the location wooden block and mark in the
cockpit through the holes in the location wooden block.
Location wooden Block (2mm)
1
Location wooden Block (2mm)
6
TP Screw (2.3x8mm)
Ply (15x15x3mm) 6
TP Screw (2.3x8mm)
Epoxy the plies under the cowing in fuselage and assemble
the cowing to fuselage with TP screw.
Drim the relevant position on the cowling for
assembling the engine.
64
65
12
66
63
62
Accessory list for the coming installation steps.
Trim the covering carefully from the relevant position
in the wing for assembling the wheel wells.
Assemble the retract to appropriate position in the wing.
Epoxy the wheel wells to the wings.
8
TP Screw (3x20mm)(Not included)
Rib template (2mm ply)
6mm
Wood dowel (6x30mm)
4
Wood dowel (6x30mm)
1
Rib template (2mm ply)
1
Main wing joiner (25x750mm)
Main wing joiner (25x750mm)
6mm
Rib template (2mm ply)
2
Screw (6x50mm)
Blind Nut
Screw (6x50mm)
According to the rib template drill holes in one wing and
epoxy wood dowel in them.
According to the rib template drill holes in the fuselage.
Assemble the wings to the fuselage steadily.
Reinforce the connection between the fuselage and
the wings by the screws as illustration.
23
22
27
5
25
24
26

4mm
4
Wood dowel (4x30mm)
Wood dowel (4x30mm)
Set the U-style wire through the enlarged hole as below.
U-style wire 130x25mm
Stab joiner (12x220mm)
1
Stab joiner (12x220mm)
B=B'
A=A'
A`
A
B`
B
A ccording to thr rib template drill holes to the tail of
fuselage as below.
1
Rib template (2mm ply)
4mm
2
1
Steel wire (0.5x3000mm)
U-style wire 130x25mm
Stab joiner (12x220mm)
1x20mm
Make sure to glue securely.
If not properly glued, a failure in flight may occur.
Temporarily fasten down the main wing and
check its correct position.
Securely glue together.If coming off during flights,
you'll lose control of your airplane which leads
to accidents!
Drill holes to appropriate position in the stabilizer and
epoxy it to the fuselage as below.
Drill two holes at the stabilizer root base on rib template
and epoxy the wood dowel in them.
Assemble the wings.
1
Stab joiner (12x220mm)
2
Steel wire (0.5x3000mm)
1
U-style wire 130x25mm
Pin hinge(24x24mm) 6
4
Matal douel (4x30mm)
1
Rib template (2mm ply)
2
Plastical tube(3x30mm)
2
Copper joiner
2
Clevis
2
2
Screw (2x10mm)
Nut (2mm )
2
Washer(2x5mm)
28
29
30
31
32
6
Accessory list for the coming installation steps.
Linkage Stopper
Washer (2mm)
Washer (2mm)
Nut (2mm)
Set screw (3x4mm)
Washer (
2mm )
Set screw (3x4mm)
1
1
1
1
Assemble the servos and switch.
Drill four holes at the diameters as show
for engine mount.
Assemble the engine.
Washer (5mm)
Screw (5mm)
6.2mm
Blind Nut
4
Blind Nut (5mm)
Fuel supply line
Fuel spray line
Air pressure line
Assembly of the fuel tank.
Mount the fuel tank to the fuselage.
Fuel tank (800cc) 1
Assemble the throttle servo in the fuselage.
57
56 59
60
61
11
58

4
4
Clevis
Copper joiner
4
4
Screw (2x10mm)
Nut (2mm )
4
Washer(2x5mm)
Steel wire
Copper joiner
Lock Nut (2mm )
Screw (2x10mm)
Ball joint
Washer(2x5mm)
Install the servo.
Assemble the servos for the rudder and tail wheel to
appropriate position in the fuselage.
TP Screw (2.3x8mm)
1.5mm
6
TP Screw (2.3x8mm)
Ply (15x15x3mm) 6Engine mount is a movable cylinder.
268 mm
1
Linkage Stopper
4
12
Washer(5mm)
Spring Washer (5mm)
1
4
Screw (5mm)
Plastic tube (2x650mm)
Washer
4
4
Blind Nut (5mm)
Fuel tank (800cc) 1
(Not included)
(Not included)
(Not included)
(Not included)
The front view when the 50cc engine install completion.
Trim the tail wheel cover and assemble it to
fuselage with screw.
The side view when the engine install completion,
customers can adjust the engine to a appropriate
position by move the engine mount.
51
50
53
54
10
Accessory list for the coming installation steps.
52
Glue the elevator to the stabilizer by CA and epoxy.
Securely glue together. If coming off during flights, you 'll
lose control of your airplane which leads to accidents!
B'
A A'
B
Make sure to glue securely.
If not properly glued, a failure in flight may occur.
Temporarily fasten down the main wing and
check its correct position.
Securely glue together.If coming off during flights,
you'll lose control of your airplane which leads
to accidents!
A=A'
B=B'
Assemble the elevator sever to appropriate position
in the fuselage.
1mm
Elevator
Tailing
edge
Make sure they are in
the right position while
installing.
Keep some space about 1mm width between
elevator and tailing edge.
Apply instant type CA glue to elevator and pin hinge.
Make sure hinges are
mounted in the same line.
6
Pin hinge(24x24mm)
3mm
2
2
Clevis
Copper joiner
2
2
Screw (2x10mm)
Nut (2mm )
2
Washer(2x5mm)
Steel wire
Copper joiner
Lock Nut (2mm )
Screw (2x10mm)
Ball joint
Washer(2x5mm)
Install the servo.
Assembly of the stabilizer.
34
35
36
37
33
7
38

Make sure hinges are
mounted in the same line.
1mm
Rudder
Tailing
edge
Cut away the rubber tube when
the epoxy glue dried.
Make sure they are in
the right position while
installing.
Epoxy the fibreglass tubes to appropriate position as
below and leave some space with width of 1mm between
tailing edge and rudder.
Pin hinge(4.7x70mm)
3
Connect the elevator and the servo via the steel wire.
Elevator servo steel wire
73mm
66mm
26mm
2.5mm
2.5mm
Securely glue together. If coming off during flights, you 'll
lose control of your airplane which leads to accidents!
2
Plastical tube(3x50mm)
30mm
25mm
3mm
110mm
Drill holes to the relevant position in the tailing edge
and epoxy the rudder to them.
Drill holes to appropriate position in the rudder and epoxy
the ping hinges in them
Drill a hole to the appropriate position through
the rudder as illustration.
4
Plastical tube(3x50mm)
4
Steel wire (0.5x3000mm)
2
2
2
Clevis
Washer(3x15mm)
Lock Nut (3mm )
1
Screw (3x80mm)
4
Copper joiner
3
Pin hinge(4.7x70mm)
4
Clevis
4
4
Screw (2x10mm)
Nut (2mm )
4
Washer(2x5mm)
TP Screw(3x20mm)
Washer (3x6mm)
4
4
1
1
1
Wooden Block (9mm Ply)
Wooden Block (3mm Ply)
6
TP Screw (2.3x8mm)
Ply (15x15x3mm) 6
Wheel (45mm)
40
39 41
42
43
8
Accessory list for the coming installation steps.
2
Steel wire (0.5x3000mm)
2
2
2
Clevis
Washer(3x15mm)
Lock Nut (3mm )
1
Screw (3x80mm)
2
Copper joiner
Washer(3x15mm)
Screw (3x80mm)
Lock Nut (3mm )
Clevis
Aluminum tube
Steel wire
The sketch map after the rudder shaft assemble finished.
The sketch map of the linkage for the rudder
and the tail wheel.
Collar
Tail landing gear
Collar
Collar
Assemble the tail landing gear to the wheel steeling
mounts as below.
Wooden Block (9mm Ply)
Wooden Block (3mm Ply)
TP Screw(3x20mm)
Washer (3x6mm)
TP Screw(3x20mm)
Washer (3x6mm)
4
4
1
1
Wooden Block (9mm Ply)
Wooden Block (3mm Ply)
Wooden Block (9mm Ply)
Wooden Block (3mm Ply)
Assemble the wheel mount to the thick wooden block
with screw,cut the surplus parts and epoxy the thinner
wooden block to it as illustration.
2
Steel wire (0.5x3000mm)
Steel wire (0.5x3000mm)
Wire for rudder servo
Wire for elevator servo
Wires for tail wheel
Wheel (45mm)
The scatch map of the servo wires position inside
the fuselage.
Epoxy the whole wheel mount set to the form in the
fuselage and be carefule don't let the arm touch the
fuselage when it works
45
46
47
48
49
9
44