Durafly GOBLIN User manual

Instruction Manual

1
Introduction:
This great looking little racer can trace it's lineage back to the very popular Rare Bear parkflyer racer. This
was a very fast parkflyer based on the Reno Racers that was amazing fun to fly, was very tough and it
became a firm favorite extremely quickly.
The Goblin carries on all these traits coupled with great looks and attention to detail. It comes with a choice
of 2 eye-catching color schemes either yellow/black/silver or pink/blue/black and factory applied decals. It
has scale looking ribbed control surfaces with dummy trim tabs on ailerons and elevator, racy looking
teardrop blisters on the cowling and streamlined painted canopy. A huge spinner that flows into the
cowling profile finishes of that streamlined racy look. The Goblin looks good on the ground but even better
in the air with it's tapered wing and rounded wing tips and tail feathers.
Power is provided by a powerful pre-installed 3536-1400KV brushless motor turning a 7 x 6 2 blade prop,
this is coupled to a high quality 45 amp Aerostar ESC. 3 x 9g servos with pushrods and control horns are also
pre-installed which makes for a very quick assembly time. The wide bodied fuselage not only looks good
but allows plenty of room and access for a 1000-1800mAh 4S battery. This combination of a lightweight
EPO airframe, a high power brushless motor and simple aileron and elevator set up puts the Goblin
amongst the most exhilarating park flyers on the market today.
So why not get a bunch of your flying mates to also purchase a Goblin, set up some pylons and do a bit of
inexpensive pylon racing, it's great fun. There is no need to modify the Goblin and large individual race
numbers are supplied to tell who is who. It is fast and great fun to fly as it comes out of the box which will
keep the racing more evenly matched for more exciting finishes. To make things even more exciting why
not design your own FPV platform and have great fun FPV racing with the Goblin.
We hope you enjoy assembling and flying your Goblin Racer as much as we enjoyed developing and testing
it.
Features:
• Quick assembly, can be ready to fly in 20 minutes
• Wide bodied fuselage for easy battery access
• 2 high visiblity color schemes available
• Large individual race numbers included
• Powerful 3536-1400KV brushless motor and 45A ESC pre-installed
• 3 x 9g servos with pushrods pre-installed
• One piece model for easy transportation
Specs:
Format: Plug and Play
Wingspan: 820mm (32.25ins)
Length: 615mm (24.25ins)
AUW (Ready to Fly): 820g (this will vary with battery choice)
Motor: 3536-1400KV brushless
ESC: Aerostar 45 amp
Propeller: 7 x 6 (2 blade)
Servos: 3 x 9g
Required:
4ch or greater transmitter and receiver
1000-1800mAh 4S lipoly battery (max weight 170g)

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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 to the assembly,
safe operation and maintenance of this hobby product. It is highly recommended 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 Goblin Racer is designed for intermediate to advanced pilots.
-Alway exercise 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
safety procedures.
-Never power up the model in confined spaces and always keep the propeller 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, trees, 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
suitable open outdoors space.

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3
45
Components:
1. Main Wing with 2 x pre-installed 9g servos, fitted pushrods and control horns .
2. Fuselage with pre-installed motor, prop, spinner, ESC, 1 x 9g servo and fitted
pushrod.
3. One piece fin and rudder.
4. Tailplane and hinged elevator with fitted control horns.
5. Fuselage underbelly pan.

4
Assembly:
The Goblin is a one piece model so the wing is permanently attached to the fuselage. If your
model has any residue paint on the surfaces to be glued then either lightly sand or prick the
surfaces with a pin to help the adhesion.
Apply a good foam adhesive or slow setting CA to the wing and fuselage surfaces
where they are to be joined.
Warning: Before you start to assemble the Goblin please read through
this manual as there are some important notes and updates you need to
be aware of before you start.
Before you glue the wing permanently to the fuselage please check the
operation of the ESC.

5
Feed the aileron Y lead connector through the opening behind the ESC.
Carefully tuck the leads and connectors through into the receiver/battery bay and
position the wing onto the fuselage wing seat.

6
Ensure the wing fits snuggly and stays perfectly aligned to the fuselage
as the glue sets.
Once again remove any residue paint or prick with a pin the rear of the fuselage and the
underneath of the tailplane where the 2 surfaces are to be joined together.

7
Apply a good foam adhesive or slow setting CA to the rear of the fuselage and the
underneath of the tailplane where the 2 surfaces are to be joined.
Carefully position the tailplane onto the seat at the rear of the fuselage, ensure the
tailplane remains perfectly aligned with the fuselage and wing as the glue sets.

8
Again remove any residue paint or prick with a pin the area where the fin/rudder assembly
is to be attached to the fuselage. Do the same with the underneath of the fin/rudder
assembly and the locating tongue on the bottom of the rudder.
Apply a good foam adhesive or slow setting CA to the rear of the fuselage and the underneath of
the fin/rudder assembly and locating tongue where the 2 surfaces are to be joined.

9
Carefully position the fin/rudder assembly onto the seat on top of the tailplane making sure
the tongue on the rudder engages properly in the rear of the fuselage. Ensure the assembly
remains perfectly aligned with the fuselage as the glue sets.
Install the receiver of your choice, minimum of 4 channels.
Important Note: As the Goblin is quite a fast model we recommend that the EPO hinges of the ailerons and
elevator are reinforced with a good quality hinge tape such as 3M Blenderm tape. With the control surface
fully deflected down apply the tape to the top surface and ensure it is firmly pushed down into the gap. Turn
over and repeat this process on the underside of the control surface.

10
Update: The picture above shows the attachment of the elevator ball links. If your model has been
supplied with ball links then please replace them with the supplied clevises. You will find a packet of
4 clevises with keepers in the box. The clevises improve the control authority of the Goblin.
When fitting the clevises slide the clear plastic keeper over the pushrod first then screw on
the clevis. Adjust the length to achieve a neutral control surface then slide the keeper over
the clevis to secure it.

11
Do the same with the ailerons and replace the ball links with the clevises.
Again remove any residue paint or prick with a pin the area where the underbelly
pan is to be attached. Apply some medium or slow setting CA to the area.

12
Carefully position the underbelly pan and hold in place until the glue sets.
The assembly of your Goblin Racer is now complete.

13
Important Notes :
We highly recommend that you follow these important steps before flying your Goblin Racer and
you may wish to do these before you start the assembly.
The down thrust on the motor needs checking, the gap between the spinner and the top of the
fuselage should be between 4-4.5mm as shown in the picture below.
If your model only has a gap of about 2mm then please do the following :
1. Remove the spinner and propeller assembly so that you can access the 4 motor
screws that mount the motor to the firewall.
2. Remove the 4 mounting screws and ease the motor forward so that it is clear of
the cowl. You will need to push the ESC through the firewall slightly to do this.
3. At this point it is a good idea to check the 4 screws that hold the motor to the
metal cross mount to ensure they are tight.
4. You may find that there is a washer already behind the top mounting point. If so
either replace this washer with a thicker one or add another washer. The total
thickness of the washer(s) wants to be between 1-1.5mm, this will then give you
the required down thrust.
5. Refit the motor with the washer(s) behind the top mounting and tighten the 4
mounting screws.
6. Whilst the propeller assembly is removed it is best to bind your receiver to your
transmitter and check the settings. Also ensure the control surfaces are set to
neutral and check the control throws (see "Setting Up" on the next page).
7. Before refitting the propeller and spinner assembly it is a good idea to check the
balance of the propeller and balance as necessary.
8. Refit the spinner backplate and then the propeller, washer and nut. Ensure the
propeller trailing edge is against the locating pegs of the backplate when
tightening the nut and washer. This is to ensure that the spinner cone aligns
properly with the backplate.
9. Refit the spinner cone and tighten the 2 screws.

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Setting Up.
Now that your Durafly Goblin Racer is built you are ready to set up the model for its maiden flight. When
setting up please use a battery as recommended further on in the manual (max battery weight is 170g).
For safety please remove the propeller when binding your transmitter to your receiver. Plug in the servo
connections to the connection points of your receiver (please be mindful of polarity). Switch on your
transmitter first with the throttle fully closed and the throttle trim either neutral or all the way down. Then
connect your flight battery and wait for the series of beeps to stop then slowly open the throttle, the motor
should now run and please check that it is rotating in the correct direction, clockwise looking from the rear.
Ensure the elevator and aileron trims are centered on your transmitter then check that the control surfaces are
at neutral. You may need to adjust the clevises at this point to neutralize the surfaces. Adjust the throws to the
suggestions further on in the manual. Use your rates to allow switching to high and low rates, if you like to use
exponential rates then this can also be dialed in at this time. 30% on the elevator and 25% on the ailerons is a
good starting point.
Refit the propeller and spinner assembly as per important note on the previous page..
With a recommended battery installed check the center of gravity and ensure it is within the range as
indicated further on in the manual. Move the battery forwards or backwards to achieve the correct balance
point.
Flying Tips.
Before you fly please check that the controls are working in the correct sense ie; aileron stick left, left aileron
goes up, right aileron stick, right aileron goes up, elevator stick down, elevator goes up and finally elevator
stick up, elevator goes down. Re-check the balance point.
The Goblin Racer is a hand launched RC plane, if you are unsure of hand launching the plane yourself then
please find someone who can assist you. With your hand on top around the cockpit area apply 3/4 to full
throttle and underarm throw the Goblin with the right wing slightly low, this is to counteract the slight torque
roll you will get to the left when the speed is low. It only needs a gentle yet firm throw to get her into the air.
Once airborne simply climb to a safe altitude to adjust your trims to get the model flying straight and level on
about 1/2 to 3/4 throttle.
If your plane is not flying well land as soon as possible and adjust the settings as necessary and then try again.
Once you have your Goblin Racer flying well you can explore its flying characteristics. It will be able to fly all
your manoeuvres from rolls, loops, pylon turns and slow and fast passes over the take-off area.
When it comes to landing line up the Goblin with the landing strip (hopefully a nice flat grass area) use your
elevator to control pitch and speed, throttle to control descent, ailerons for direction and to keep the wings
level, then simply glide the Goblin home.
Your maiden flight is now under your belt and the fun can start. Time to re-charge your batteries and really
explore the delights of the Goblin Racer. Hopefully some of your flying friends have purchased one then you
can set up some pylons and do a bit of real racing, this is great fun. Use the supplied numbers to individualize
your racer. You may also want to design and fit a FPV platform in place of the canopy/battery hatch, then you
could have great fun doing a bit of FPV racing.
We hope you enjoy flying your Durafly Goblin Racer and if you haven't already tried our other models in the
Durafly range then we recommend that you take a look at them at www.hobbyking.com.

15
Recommended Center of Gravity
Measure for the Center of Gravity from the leading edge of the wing at the center
section. Balance the Goblin nearer the forward 45mm mark for initial flights then it
can be moved rearwards as you get used to the flying characteristics. Do not go
beyond the 50mm max rearward position.
Suggested Control Throws
Ailerons
Recommended Batteries
We recommend a 4S lipoly battery of 1000mAh to 1800mAh capacity. The
maximum weight of the battery must not exceed 170g otherwise you will have
problems achieving the correct C of G.

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Accessories.
Turnigy Nano-Tech
1300mAh 4S 45~90C
Lipo Pack
SKU: N1300.4S.45
Turnigy Graphene
1300mAh 4S 45C Lipo
Pack w/ XT60
SKU:9067000127-0
Turnigy Nano-Tech Plus
1300mAh 4S 70C Lipo
Pack w/XT60
SKU: 9210000263-0
ZIPPY Compact
1000mAh 4S 35C Lipo
Pack
SKU: ZC.1000.4S.35
OrangeRx Tx6i 6ch 2.4GHz
DSMX Compatible Radio
System
SKU: 9171001330-0
Turnigy TGY-i6 Mode 2
AFHDS Transmitter and
6CH Receiver
SKU: 9114000020-0
Turnigy TGY-i6S Digital
Proportional Radio Control
System
SKU: 9114000053-0
Turnigy Accucell C150 AC/DC
10A 150W Smart Balance
Charger
SKU: 995900001-1
Turnigy Reaktor T240 AC/DC
10A 2 x 150W Touch Screen
Charger
SKU: 995900002-3
3M Blenderm Hinge
Tape
SKU: 9171000115

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Replacement Parts.
Main Wing
Yellow: 9310000419-0
Pink: 9310000426-0
Fuselage
Yellow: 9310000418-0
Pink: 9310000425-0
Tailplane
Yellow: 9310000420-0
Pink: 9310000427-0
Fin/Rudder
Yellow: 9310000421-0
Pink: 9310000428-0
Underbelly Pan
?????????
7 x 6 Propeller
???????
Spinner
9310000422-0
Motor
9310000423-0
Yellow Decals
9310000424-0
Pink Decals
9310000429-0

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