Please read this manual carefully before operating this plane.
BF-110
Read this instruction manual fully so as to become completely familiar with the features of
this product before operating. Failure to operate this product correctly could result in
damage to the product, personal property and cause serious injury. This is a sophisticated
hobby product and is NOT a toy. It must always be operated with caution, common sense
and some basic mechanical ability. This manual provides instructions as the the assembly,
safe operation and maintainence of this hobby product. It is highly reccommneded that you
follow and read fully the instructions and warnings stated in this manual including safety,
assembly, set-up and flying guidelines in order to operate this product correctly and avoid
damage or serious injury.
- This is a radio controlled flying model and as such must always be flown with caution and
care. This is not a toy.
- The Durafly Bf.110 is designed for intermediate to advanced pilots.
- Alway exersie great caution when using the recommended battery to power this product.
For full safety notes and operating procedures, please see information provided by your
battery supplier.
- Take great care when connecting/disconnecting the battery. See battery supplier for full
safty procedures.
- Never power up the model in confined spaces and always keep the props clear of
obstructions.
- This product is not a toy. Children must be accompanied by an adult at all times if operating
this product.
- Only fly this model in an open area away from crowds, people, buildings, tree's, power lines
and obstructions.
- Always put safety first when operating this model and consider the warnings stated above.
- The supplier/manufacturer accepts no responsibility for damage or injury caused through
the use of the product. Not suitable for children under the age of 14. THIS IS NOT A TOY.
As the user of this product you and you alone are responsible for operating it in a manner
that does not endanger yourself and others around you or result in damage to the product or
property of others. This product is operated via a radio controlled system that in some cases
can be subject to interference from sources outside of your control. Interference may result
in a momentary loss of control so it is always recommended that this product be used in a
suitably open outdoors space.
CONTENTS
*Introduction ................................................................................................................. 1
*Specification ............................................................................................................... 1
*Content ....................................................................................................................... 2
*Required to complete model ...................................................................................... 2
*Assembly .............................................................................................................. 3-10
*Setting up the model ............................................................................................ 11-13
*Model flying precautions ........................................................................................... 14
*Pre-flight checks ....................................................................................................... 15
*Flying the Bf.110 ....................................................................................................... 16
*Bf.110 tips ................................................................................................................. 17
*Spare parts listing ..................................................................................................... 18
*Trouble shooting ....................................................................................................... 19
*Contact ...................................................................................................................... 20
88 BF-110
1
INTRODUCTION:
Thank you for purchasing this Bf.110 from Durafly, the worlds first Plug and Fly model
of this classic WW2 fighter. The Durafly PnF Messerschmitt Bf.110 is a close to scale
model of the iconic German twin engined fighter. Durafly have captured perfectly the
aggresive looks and outline of this impressive aircraft but with the quality, ease of
construction and great flying characteristics Durafly is famous for. Thanks to the
Bf.110’s PnF format, the part count is minimal and assembly is very straight forward so
you’ll be flying in no time at all. All included electronics are pre-installed (brushless
motors, ESC’s, servo’s and electronic retracts) and only a few additional items are
required to complete the model (see ‘required to complete the model').
On the ground and in the air, your mastery of the Bf.110 will be complete thanks to its
extremely well mannered handling characteristics and wide ranging performance. Twin
engined models add a unique dimension to model flying and you won’t be disappointed
with the Durafly Bf.110.
SPECIFICATIONS:
Wingspan: 1200mm
Length: 900mm
Flying weight: 1300-1400g
Controls: 5 channel (Ailerons, Elevator, Throttle, Rudder, Retracts)
ESC: 2 x 20amp Brushless speed controllers (pre-installed)
Motor: '2620' 1350Kv Brushless Outrunners (pre-installed)
Landing gear: Metal trunnion electronic retract units (pre-installed)
Prop: 2 x 8x4 scale 3 blade props (included)
Battery: 11.1V (3S), 2200-2700mah Lithium polymer (lipo), min 25C, recommended.
Radio system: minimum 6 channel Rx and Tx required.
2
CONTENT:
1. Fuselage assembly including canopy.
2. Main wing (left and right) with retracts and motor in nacelles.
3. Horizontal stabilizer.
4. Vertical stabilizers.
5. Spinner and proppeller set.
6. Bombs and rack.
7. Main wing spar.
8. Control and mounting hardware/accessories
REQUIRED TO COMPLETE MODEL:
In the 'Plug n Fly' format the Bf.110 will still require some additional electronic
components to be ready for flight. Durafly recommends these Turnigy products below
from HobbyKing for ease of installation, optimum performance and great value.
Available at hobbyking.com
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OrangeRx T-SIX 2.4GHz 6CH
Programmable Tx:
Part No. 9403000001 Mode 1
9403000002 Mode 2
Turnigy 2200 mAh
25C 3S Lipo:
Part No. T2200.3S.25
OrangeRx R615 6Ch 2.4Ghz
Receiver R620:
Part No. R620
BF-110
3
ASSEMBLY:
1. Locate aileron control horns and push rods. Install the aileron control horn using the
screws and screw driver provided. Now connect the pushrod to the aileron servo
horn as shown. Repeat this step for the remaining wing panel.
2. Using a sharp scalpel, cut both ailerons free of the main wing at the tip leaving 1mm
of clearance. Ensure your cut is at a equal distance from the wing tip for both ailerons.
PB1.7 x 10mm
4
3. Locate the plywood wing spar and glue it into either one of the wing panels. Push
the spar into the wing until the center of the spar meets the edge of the wing panel
as shown. Apply some glue to this same edge and the exposed portion of the spar.
Now push the remaining panel fully onto the spar until both sides meet, ensuring
both wing halves are completely aligned with one another at the center and that all
wires are pulled neatly through to the top of the wing. It is recommended that you
do a dry assembly of all parts first.
4. Glue both wing bolt plates into place on the wing and set the wing aside until
the glue has completely cured. Again ensure the wing remains fully aligned at the
center when left to dry.
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BF-110
5
5. Offer the completed wing up to the underside of the fuselage installing the leading
edge first. Pull through all wires from the wing into the opening of the fuselage,
ensuring the wing sits centrally to the fuselage when installed as shown. Use one of
the two wing bolts (35mm in lenght) to secure the trailing edge of the wing to the
fuselage.
6. Referencing the images below, locate the bomb rack and place over the front wing
bolt plate. Ensure the wing bolt hole at the front of the rack lines up exactly over the
hole of the front wing bolt plate. Use the remaining wing bolt to secure the leading
edge of the wing to the fuselage.
PM3.0 x 35mm
PM3.0 x 35mm
6
7. The bombs can now be glued in place. Alternatively velcro can be used to make
them removable.
8. Locate the vertical stabilizer and install the rudder control horns as shown. Now
glue the vertical fins to both ends of the horizontal stabilizer ensuring they at 90° to
the tail as illustrated. Put the tail aside and allow the glue to dry.
PB1.7 x 8mm
PB1.7 x 8mm
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BF-110
7
9. With the fins firmly glued in place, the rudder control rods can be installed. Power
up the servo’s to center and raise the arms. You’ll now be able to access the control
horns easily to connect the push rods as shown.
10. Locate the elevator control horns and install as shown. Connect the rudder servo
leads to the Y-lead that’s taped in place at the rear exit of the fuselage.
11. Pull forward into the fuselage as much of the rudder Y-lead as possible. Then with
the tail plane turned over, apply glue to the entire portion of the fuselage shown.
PB1.7 x 10mm
8
12. Flip the tail plane back over and position firmly in place on the fuselage, pulling
through any remaining servo leads as you do. Ensure there are no gaps and that
the tail is level and aligned correctly to the wing and fuselage. Measuring equal
distances bewteen the point shown with ensure this.
13. Once the tail glue has dried, center the elevator servo and connect the elevator
clevises to the control horns as shown.
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Right.
Leading
Edge
Left.
Leading
Edge
BF-110
9
14. The final stage of assembly is to fit the props and spinners. Pay close attention
when fitting the props and ensure that both motors turn in towards the fuselage when
the motors run. The right hand side motor/prop (looking from the front) turns in a
anti clockwise direction with the leading edge of the blades facing the fuselage and
the left hand side motor (looking from the front) turns in a clockwise direction, again
with the leading edge of the blades facing the fuselage. The images shown below fully
illustrate the correct installation of the propeller and correct rotation of the motors.
15. Once you have established propeller orientation, offer each prop up to the prop
shafts and locate into position on the spinner back plate. Use the nut from the prop
shaft to secure the prop in place on the shaft. The spinner can now be screwed in
place but be sure to double check that each blade retaining bolt is secure and all
blades are at an equal distance from one another before you do.
PM3.0 x 10mm
10
16. Locate all numbered servo Y-leads and connect to their corrosponding servo
leads. Connect these servo leads to your receiver of choice (as stipulated by
your receiver manufacturer). Connect the esc Y-lead (supplied) to both XT60
plugs that exit the center section of the wing as shown. Note the UBEC coming
from the esc Y-lead. This powers your receiver and servos and should be
connected to any free port of your receiver. With all leads now connected, install
your receiver in the location shown, keeping all cables as tidy as possible. A
Hobbyking OrangeRx R620 recevier is shown and recommended.
Assembly of your Bf.110 is complete.
Now perform a final check on all screws, bolts and components,
ensuring all are secure and firmly in place.
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BF-110
11
SETTING UP YOUR MODEL:
1. Once you have established a connection between your receiver and transmitter
turn on your transmitter followed by your receiver (by connecting your 2200mah 3s
lipo to the speed controller (ESC). Also ensure the battery is fully charged.
2. With the electronics powered up and the servo's centered, ensure that all control
surfaces are level. If not, adjust by turning the control clevis's accordingly until the
control surfaces are level as shown below.
3. Check all control surfaces are moving in the correct direction with the correct stick
input (see below).
Aileron
(Roll)
Elevator
(Pitch)
Rudder
(Yaw)
Roll left
Roll right
Pitch up
Pitch down
Yaw left
Yaw right
Elevator RudderAileron
12
4. The Bf.110 handles extremely well in flight, and on the ground and setting it up
correctly is vital. The following set-up below is recommended for the best Flight
performance.
Control throws:
* Elevator ‘low rates’ 8mm ‘high rates’ 12mm in either direction from neutral.
* Aileron ‘low rates’ 6mm ‘high rates’ 10mm in either direction from neutral.
* Rudder ‘low rates’ 6mm ‘high rates’ 8mm in either direction from neutral.
CG Location:
5A. The suggested CG for the Bf.110 is approximately 60-70 mm from the leading
edge of the center section of the wing. With a 2200mah 3S lipo installed the model
should balance between these points. The C/G given will make for the best all
round sports/scale flying characteristics though you maybe want to adjust this later to
better suit your own flying style. Do this by moving your flight battery more fore or aft.
v
v
CG 60-70mm ~ from
leading edge.
6 -8 mm
6 -8 mm
Rudder
8-12 mm
8-12 mm
Elevator
60-70 mm ~
6 - 10 mm
6 - 10 mm
Aileron
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BF-110
13
5B. It is recommended that velcro be used to hold your flight battery firmly in place in
the model. Note the location of the recommended Turnigy 2200mah 3S lipo when
installed in the fuselage. This is the correct approximate location for installing the
lipo and achieving the suggested CoG.
With assembly and set-up now complete, your Durafly Bf.110 should be ready for
flight. However we recommend you read and follow the advice given in the next stage
of this manual before flying your Messerschmitt.
14
MODEL FLYING PRECAUTIONS:
- Select your flight area carefully. Always choose an open space that is unobstructed
from trees and buildings and away from crowed area's. Avoid flying in area's with
roads, electric/telephone poles/wires and water near by or within close proximity to
full size air traffic.
- Do not fly this model in poor weather. High winds, low visibility, inclement
temperatures, rain and storms are to be avoided.
- Never attempt to catch this model whilst in flight. Even a slow moving model can
cause harm to yourself and/others and risks damage to the model.
- This model is recommended for children no younger than 14 years old. All children,
not matter what age, should always be supervised by a capable and responsible
adult when operating this model.
- Always unplug your model battery when not in use. Never leave the battery installed
in the model.
- Please remember to keep clear of the propeller at all times when your flight battery is
connected.
- Before flying, always turn on your transmitter first then plug your flight battery into
the model.
- After flying, always unplug your battery first then turn off your radio transmitter.
- Exercise caution when charging your batteries and follow in full your battery
manufacturers safety guideline when doing so.
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BF-110
15
PRE-FLIGHT CHECKS:
1. Always range check your model before any flight (especially when flying a new
model for the first time). Follow your radio manufacturers guidelines for performing
this check.
2. Check all screw/bolts and mounting points are firmly secured, including control
horns and clevises.
3. Only fly with fully charged batteries (both in your radio and model). Failure to do
so could result in loss of control, damage to the model and/or persons/property
around you. Check your batteries are fully charged.
4. With the model powered up (Transmitter on first, then receiver/model) check that all
surface are free from damage/obstructions, moving in the correct directions and
freely with stick input.
5. Inspect the model and prop for any damage that may have occurred during transit
and listen for any unusual sounds from the electronics when powered up. If in
doubt, do not fly.
6. With the model held securely and the prop free of obstructions, increase the throttle
just slightly to confirm the rotations of the prop is correct. The model should want to
pull straight forward with throttle.
7. If this is your first flight with the model double check the C/G is at the correct
position. If not adjust battery position inside model accordingly.
8. If you are an inexperienced model pilot seek the help and assistance of an
experienced pilot to perform these final checks and to test fly the model for you.
16
FLYING THE BF.110:
The Durafly Bf.110 may be close to scale in its outline, yet it flies exceptionally well for a twin
engined model. With its counter rotating configuration and powerful set-up, the Bf.110
enjoys a great flight envelope, maintaining its maneuverability and aggressive stance in the
air throughout the speed range. Use of rudder in the air (although not completely
necessary), does add its overall flying prowes when used in turns and of course
complements the steerable tail wheel on the ground. The Bf.110 is capable of all manner of
scale and sports maneuvers yet will not bite you in the stall, benefiting from very benign stall
characteristic. With the recommended 2200mah 3S lipo you have a good combination of
power, with respectable flight times. You should typically expect flight times of approximately
7 minutes with varied throttle use in flight. For greater duration you can of course fit a higher
capacity pack (the Bf.110 will handle the extra weight). On the ground the handling is
excellent on both short grass and paved surfaces, though hand launching would be advised
if you're flying from longer grass.That said, this Bf.110 does hand launch easily.
Taking off directly into wind should require no more than 3/4 throttle to be off the ground.
Care should be taken to increase throttle slowly during taking off, allowing time for any
correction to direction with the rudder/tail wheel, whilst allowing speed/lift to gradually build.
It is recommended that some up elevator be held in for the initial rollout to help keep the tail
down whilst you build up speed, and to prevent the model from nosing over. As momentum
starts to build, gradually reduce the amount of 'up' you have held in to allow the tail to lift.
From this point the Bf.110 should take to the air with minimal amount of further 'up' elevator.
If you do wish to hand launch your model, this should be done with full power into wind and
at a slightly nose up angle with the wings level and the landing gear retracted. Climb out
from hand launch is good, with no noticeable loss in height immediately after launch.
Flying a twin engined model is an exciting and unique experience yet has traditionally been
more of a challenge. With the Durafly Bf.110 however you needn't worry. It easily handles as
good as any of the single engined warbirds in the range whilst, providing that twin sound and
experience in the air. All basic aerobatic maneuvers can be done with ease at full throttle
(even more so with coordinated stick inputs). For closer to scale flying you'll want to bring
the throttle down to approximately 3/4 throttle. Here you'll benefit from a more realistic speed
and a slight lengthening of flight times, whilst maintaining complete maneuverability. Also to
avoid over heating your motors and ESC's, it is generally not recommended to fly on full
throttle for the entire duration of the flight. In slow flight the Bf.110 still maintains a good level
of control and authority for both low/slow fly-bys and landings. The Bf.110 does land easily
and will not present a challenge for pilots with low wing experience. When you are ready to
land, lower the gear on the down wind leg to help the model bleed off excess speed ready
for when you make the turn into the approach. A high angle of approach is recommended as
this will help maintain a steady descent rate when coming into land. The Bf.110 has a
reasonable glide for a twin, but the drag of an additional prop does need to be taken into
consideration. So, always 'fly' into your landing with the combined use of throttle and
elevator. As you flair for landing, be sure to hold in some additional up elevator once you’ve
touched down. This will prevent the bf.110 from tipping up onto its nose especially when
landing on longer grass. Once down, you can enjoy the exceptional ground handling of the
Messerschmitt thanks to its tough metal trunnion electric retracts and steerable tail wheel.
Happy flying and thank you for choosing Durafly.
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BF-110
17
BF.110 TIPS:
1. Whilst not essential to flying, the use of rudder in flight will greatly improve the look
of the model as it flies through maneuvers. It will let you explore the full potential of
this fine model and improve your flying skill. A mix of 40% aileron-rudder is
recommended as a good starting point.
2. Although it can be, the Bf.110 doesn’t need to be flown at full throttle all the time.
Dropping back on the throttle will not only let you enjoy the Bf.110 at a more scale
pace, it will also result in longer flight times, reduce the risk of the motors and
ESC’s over heating in hot weather and increase the life of your flight pack.
3. Flight packs of 25C dischrage rate or above are recommended for use in the Bf.110
to ensure optimal performance in flight.
4. Keep all leads within the fuselage area (under the battery hatch) as tidy as possible.
Following closely the slender lines of the original means there is not a great deal of
space in this area and tidy wires not only looks better but also allows the canopy to
attach fully whilst allowing air to pass around the internal electronics.
5. Inspect the propeller blade mounting nut/bolts frequently, especially if you’ve
suffered a hard landing or the prop has been knocked. The blades can come out of
alignment if forced, so it is important to maintain an equal distance between all
three blades to avoid any unwanted vibration or a drop in efficency. Keep them tight!
6. When the Bf.110 is not in use, it is recommended that it is stored with the landing
gear in the retracted position. This will prevent the gear door springs from stretching
and thus improve the operational life of the system.
Thank you again for purchasing the Durafly Messerschmitt Bf.110.
We hope you’ll have many happy days of dog fighting with other Durafly
warbirds and straffing runs down the strip ahead of you.
Don't forget, spare parts are available for this model,
please see opposite for details.
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