Backfire F5F User manual

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B ACKFIRE F5F
Petr Janku
Hermanice 72
Nova Paka
50901
Mail: [email protected]
5b@ 5b.cz
Web: http://www. 5b.cz
Phone: [phone]

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Thank You or buying the model o Back ire F5F. Back ire F5F is a ull-carbonic model, it is
made by lamination into negative orms. Back ire F5F is suitable or the competitive league
F5F
1
, F5B/7, and or the hobby lying as well. The model was designed or competitive lying
and its design results rom the latest innovation o the F5F category. The aerodynamic was
created by the German expert Dirk P lug.
The uselage is ull-carbonic and there is a possibility to make an Aramid or a glass
uselage as well, i the customer requests that. The wing is also ull-carbonic and there is a
carbon cloth 93g/m
2
with an orientation o ±45° on its sur ace, which inhibits rom wing-
twisting. The spar is made o UMS roving. The standard wing is made o one part, but there
is a possibility to produce the three-part
2
wing according to customer´s wish. The elevator is
made o glass with a carbon lap o the cloth 93g/m
2
.
There is also a possibility to produce a model – version „Show“ or an extreme lying. Be
very cautious while lying with „Show“, because it allows to reach high lying-speeds you
should avoid the situation when you could damage someone´s assets or hurt someone.
1Model
1.1 The Kit´s content
Fuselage
1
pc
Wing
1
pc
V
-
tail
1
pc
Connector
MPX
2
pc
Barrier motor
1
pc
Wing horn
4
pc
Screw or wing
2
pc
Barrier into uselage or servos
1
pc
Wires
or servo
4
pc
Brass wires 2mm
4
pc
Ball pivots
–
servo
2
pc
Ball pivots – V-tail 2
pc
Threaded rod 2mm 4
pc
Carbo ic rod 700mm 2
pc
1
It is necessary to use solid (one part) wing.
2
The three-part wing is designed or the hobby (recreational)- lying. It is necessary to take into account,
that this wing does not reach the strenght o the one-part wing.

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Crappi g strips 4
pc
Picture 1: Accessories
1.2 The fittings needed for completing
The cone
–
diameter 38mm
Second glue
–
medium
Activator or the second glue
The epoxide R+G L
-
285
The consolidator R+G 285
Micro
-
ballons + Aerosil
Utility kni e
Transparent cellotape which does not leave a glue behind
Soldering
unit
Turn
-
bench Dremel
Servoconnectors

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1.3 Recommended components
1.3.1 Motors
It is possible to use any engine with the power rom 200W to 2500W. The optimal engine
weight or competitive lying is c. 280g.
Hacker
B50 F5B
B40 F5F
Kontronik
Fun 500
Kira 600
Neu Motors
1509 F5F
1512
Plettenberg
HP 220/30/A1 P6 5:1
HP 220/30/A1 P6 7:1
HP 220/25/A1 P6 7:1
HP 220/25/A1 P6 5:1
1.3.2 Propeller
3S1P 17x18 with 7:1 gear
4S1P 16x16 with 7:1 gear
1.3.3 Batteries
3s
Kokam 4000 EH
4000
mAh
30C
147x43x29mm
3s
Wide Energy WE 5000 SH
5000
mAh
30C
157x43x27mm
3s
Wide Energy WE 4100 SH
4100
mAh
30C
157x43x30mm
3s
Hi model 4600
4600
mAh
25C
165x48x24mm
3
3s
TopFuel Hacker
5000
mAh
30C
155x43x29mm
4s
4
esire Power
4500
mAh
33C
165x44x35mm
5
4s
Neu4100EP
4100
mAh
30C
160x45x31mm
4s
Neu4900Xp
4900
mAh
25C
165x44x34mm
4s
Hi model 3200
3200
mAh
25C
139x45x28mm
5s
Hi model 3200
3200
mAh
25C
139x45x36mm
6
5s
FlightPower Hacker
3200
mAh
20C
144x45x32mm
1.3.4 Servos
Ailerons
Hitec HS
-
125
Hitec HS
-
5125 MG
Volz Wing Max
Flasp
Hitec HS
-
125
Futaba S
-
3150
Volz Wing Max
V
-
tail
Futaba S
-
3114
Futaba S
-
3154
3
With 4/5s it is necessary to count with connecting the conductors directly at regulator (the conductors
cannot be drawn on the battery)
4
Practically it is possible to use any kind o battery with the maximum size o 170x45x35 mm
5
As long as the battery-high isn´t over 27mm, it is possible to use a battery up to 48 mm wide
6
This battery slightly pushes on the wing, i there is no need to use 5s battery, it is better to avoid it

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1.3. Receiver batteries
Intellect
AAA
-
750 mAh
A
-
1400 mAh
X Cell
AAA
-
1000mAh
GP
A
-
1100 mAh
A
-
1300mAh
2Fuselage
2.1 Cooling hole
First we mark the place o the cooling air´s entrance with the elt tip and we cut through
the carbonic uselage by using a kni e. We press down the cut cooling entrance under the
uselage level and we ix it with help o balsa – 2mm o thickness. We apply an epoxid with
microballons on the side rim o the cooling entrance and we leave the uselage to hardend.
Picture 2: The cooling air´s entrance

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It is possible to make the cooling air´s entrance in the wing with help o a carbonic tubule
with the 14 mm diameter. The place or leaks is marked on the wing.

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2.2 V-tail shoulder
The carbonic pins must be ground at their ends with help o a turn-bench and so their
edges are licked o . Those pins that will be sticked up in the uselage must be roughened,
so the pins will hold to uselage well. We glue everything with the epoxide. Next we cut
throught the holes or the butter ly-lever. The hole is marked directly on the uselage. We
glue the enclosed levers into the butter ly. The lever should be slipped into butter ly as
much as possible. We check the levers-position in uselage a ter the glueing.
Picture 3: The soulder for V-tail
2.3 How to glue the butterfly´s servos
We shorten the carbonic pull at the lenght 645mm and 630mm. We grind their ends again
and lick o the edges. We lick o the edges o threaded rods M2 too. We glue the
threaded rods M2 into both sides o carbonic pulls in the way so that approximately 10mm
o the carbonic pulls sticks out the carbonic pipe. We screw the boll cups at one side.

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Obr. 4: The carbonics pulls for V-tail
We screw the servos into prepared barrier and we glue their bolts with the using gun so
that we could unloose the bolts in case we su use them by the epoxide. We secure the
servos cables in the same way.
Picture 5: The barrier for the butterfly´s servos

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We give the barrier into the uselage and set the servos´ neutrals. At the end o uselage
we screw the next boll cups. It is absolutely necessary that the pulls are put through the
guide tubule in the middle o the uselage!!!
Picture 6: Putting in the servos and setting up the neutrals
We apply the epoxide with microballons thickened by aerosil on the barrier in the way
that the mixture do not slump. We inset the barrier into the uselage inchmeal and turn the
uselage upside-down. On the other side we set the ball pivot o butter ly in the cup on the
carbonic pull. The butter ly- lap must be secured against the movement with help o
cellotape.

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Picture 7: Glueing V-tail servos
Next we can put two balsa-battens
7
with 1mm thickness between ball pivots on the servo
and the uselage-bottom. The battens ensure the space needed or ball pivots movement.
We check the quality o glued joint. It is necessary to ix the butter ly to the uselage be ore
the test lying. The best way is to stick the butter ly with epoxide glue.
7
i it is obvious that the gap is bigger than 2mm it is not necessary to put in those balsa-battens

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Picture 8: Control of the glued barrier
2.4 Motor Barrier
On circuit we make ker s by using the saw or the milling machine. We screw the barrier to
the engine and protect the engine by using the cellotape against the possible epoxide-
pollution with. We apply the epoxide with ballons thickened by aerosil behind the edge o
the shoulder in the uselage. We put the engine in the uselage, we set the cone. We ix the
cone to the uselage with help o cellotape. We let to harden the uselage in the vertical
position.

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Picture 9: The glued-in of the engine-barrier

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3Wing
3.1 Horns and Pulls
We glue the levers
8
belonging in the lap in the distance o 7,3mm rom the axis o
rotation and the levers or wings in the distance o 4,4mm rom the axis o rotation. The
lever o the lap´s servo will have the hole in the distance o 7,3mm
9
rom the axis o
rotation and the lever o the butter ly´s servo in the distance o 3,0mm
10
. The pull or the
lap is 38mm long and or the wing 29mm. The pull is made o steel wire with the diameter
1,5mm and o brass lumber with the diameter 2mm. We cut c. 2mm o thread in the brass
lumber and we bend the lumber in the shape o the letter L and we inish the thread. The
thread should be c. 5mm long. We bend the steel wire only and the length o the bend
should be c. 5mm too. We roughen the places which we are going to solder by using an
emery paper. In the lever o the lap´s servo we cut the M2-thread and we glue up the
emale screws. It is necessary to grid down the servo sha t by the lever o lap.
8
I recommend to complement the levers with the brass ca
se with the diameter 2,5/1,52mm
and the length 4mm
9
when the lever o the servo and the lap have the same distance, then by the servo-de lection o 90° the
lap-de lection is 90° too
10
when we use this proportion, the wing-de lection is c. 8mm by up motion and c. 6mm by down motion

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Picture 10: Levers and pulls of the wing

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3.2 Cabels of servos and servoholder
We shorten the servos´cabels up to 4cm o distance. We solder the pins rom the crushing
bar on the servos´cabels pulled through the wing. Or we can crimpen the original pins rom
the servo-connector. We prepare the septa rom plywood 1,5mm or each servo.
Picture 11: The cables of servos and septa of servos
3.3 Connectors Wing/Fuselage
In case we work with the three-piece wing, we have to solder the connectors into wings
irst and then we glue up them with an epoxide glue. A ter this the next work procedure is
the same like working with the one-piece wing.
Picture 12: The connector for aileron of three-piece wing

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The length o cables to the receiver should be c. 9cm. We strip cables, tin-plate them and
we put the shrink- spaghetti insulation on them. We solder cables to the connector MPX,
strip the isolation with the hot-air gun and ix all with the using gun. We use the same work
procedure while soldering the connector MPX in the wing. We let the cabels so long that
their distance rom the end o the wing is c. 3cm. And, beside the shrink- spaghetti
insulation, we pull on the silicone insulation on the cable too.
Picture 13: Connectors – wing/fuselage

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3.4 Sticking up the servos into wing
First we set the neutrals
11
to all servos. We stick up the servos into wings with an epoxide.
We ensure the ailerons and laps to the wing in zero de lection by using a cellotape and we
set the neutrals o all servos again.
11
The neutrals o the ailerons are c. 1500 μs and o the lapt c. 2000 μs and 1000 μs !!! Important!!!

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Picture 14: Sticking the servos into wing
Picture 15: The servos´caps

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It is necessary to use the external voltage supply or power supply. It is more reliable to
use the connector 2mm instead o switch. The connector 2mm has a better contact. The
conductors to the battery have the cross section 0,5mm
2
.
Picture 16: Voltage supplies for the deck equipment
4Others picture

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Picture 17: Input and output of the cooling air