Hangar 9 HAN3390CKT70S Manuale utente

Aermacchi MB-339 60–85N

Instruction Manual

Bedienungsanleitung

Manuel d’utilisation

Manuale di Istruzioni

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HAN3390 Updated 10/2022

2EN

NOTICE

All instructions, warranties and other collateral documents are subject to change at the sole discretion of Horizon

Hobby, LLC. For up-to-date product literature, visit horizonhobby.com or towerhobbies.com and click on the support

or resources tab for this product.

Age Recommendation: Not For Children Under 14 Years. This Is Not A Toy.

SAFETY WARNINGS AND PRECAUTIONS

Read and follow all instructions and safety precautions before use. Improper use can result in ﬁ re, serious injury and

damage to property.

Components

Use only with compatible components. Should any compatibility questions exist, please refer to the product

instructions, component instructions or contact the appropriate Horizon Hobby ofﬁ ce.

Flight

Fly only in open areas to ensure safety. It is recommended ﬂ ying be done at radio control ﬂ ying ﬁ elds. Consult local

ordinances before choosing a ﬂ ying location.

Batteries

Always follow the manufacturer’s instructions when using and disposing of any batteries. Mishandling of Li-Po

batteries can result in ﬁ re causing serious injury and damage.

Turbine Safety

Follow any turbine safety procedures as outlined in the manual for your particular turbine. Additional details can be

found at the AMA website. (https://www.modelaircraft.org/system/ﬁ les/documents/510-A.pdf)

Small Parts

This kit includes small parts and should not be left unattended near children as choking and serious injury could result.

MEANING OF SPECIAL LANGUAGE

The following terms are used throughout the product literature to indicate various levels of potential harm when

operating this product:

WARNING: Procedures, which if not properly followed, create the probability of property damage, collateral damage,

and serious injury OR create a high probability of superﬁ cial injury.

CAUTION: Procedures, which if not properly followed, create the probability of physical property damage AND a

possibility of serious injury.

NOTICE: Procedures, which if not properly followed, create a possibility of physical property damage AND a little or

no possibility of injury.

WARNING: Read the ENTIRE instruction manual to become familiar with the features of the product before

operating. Failure to operate the product correctly can result in damage to the product, personal property and

cause serious injury.

This is a sophisticated hobby product. It must be operated with caution and common sense and requires some basic

mechanical ability. Failure to operate this Product in a safe and responsible manner could result in injury or damage

to the product or other property. This product is not intended for use by children without direct adult supervision. Do

not attempt disassembly, use with incompatible components or augment product in any way without the approval

of Horizon Hobby, LLC. This manual contains instructions for safety, operation and maintenance. It is essential to

read and follow all the instructions and warnings in the manual, prior to assembly, setup or use, in order to operate

correctly and avoid damage or serious injury.

SAFE OPERATING RECOMMENDATIONS

• Inspect your model before every ﬂ ight to ensure it is airworthy.

• Be aware of any other radio frequency user who may present an interference problem.

• Always be courteous and respectful of other users in your selected ﬂ ight area.

• Choose an area clear of obstacles and large enough to safely accomodate your ﬂ ying activity.

• Make sure this area is clear of friends and spectators prior to launching your aircraft.

• Be aware of other activities in the vicinity of your ﬂ ight path that could cause potential conﬂ ict.

• Carefully plan your ﬂ ight path prior to launch.

• Abide by any and all established AMA National Model Aircraft Safety Code.

BEFORE STARTING ASSEMBLY

• Remove parts from bag.

• Inspect fuselage, wing panels, rudder and stabilizer for damage.

• If you ﬁ nd damaged or missing parts, contact your place of purchase.

• Charge transmitter and receiver batteries.

• Center trims and sticks on your transmitter.

• For a computer radio, create a model memory for this particular model.

• Bind your transmitter and receiver, using your radio system’s instructions.

NOTICE: Rebind the radio system once all control throws are set. This will keep the servos from moving to their

endpoints until the transmitter and receiver connect. It will also guarantee the servo reversal settings are saved in the

radio system.

IMPORTANT FEDERAL AVIATION ADMINISTRATION (FAA) INFORMATION

Use the QR code below to learn more about the Recreational UAS Safety Test (TRUST), as

was introduced by the 2018 FAA Reauthorization Bill. This free test is required by the FAA for all

recreational ﬂ yers in the United States. The completed certiﬁ cate must be presented upon request by

any FAA or law enforcement ofﬁ cial.

If your model aircraft weighs more than .55lbs or 250 grams, you are required by the FAA to

register as a recreational ﬂ yer and apply your registration number to the outside of your aircraft. To

learn more about registering with the FAA, use the QR code below.

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Aermacchi MB-339 60–85N

TABLE OF CONTENTS

Notice ......................................................................................................................................................................2

Meaning of Special Language ..................................................................................................................................2

Safety Warnings and Precautions .............................................................................................................................2

Safe Operating Recommendations ...........................................................................................................................2

Before Starting Assembly .........................................................................................................................................2

Important Federal Aviation Administration (FAA) Information .....................................................................................2

Replacement Parts ...................................................................................................................................................3

Required Adhesives .................................................................................................................................................3

Required for Completion ..........................................................................................................................................4

Tools Required .........................................................................................................................................................4

Removing Wrinkles ..................................................................................................................................................4

Building Precautions ................................................................................................................................................4

Transportation and Storage ......................................................................................................................................4

Checking Blind Nuts.................................................................................................................................................4

Replacement Covering .............................................................................................................................................4

Flap Hinging ............................................................................................................................................................5

Aileron Control Horn and HInging .............................................................................................................................6

Aileron Servo Installation .........................................................................................................................................7

Flap Servo Installation..............................................................................................................................................9

Elevator Hinging.....................................................................................................................................................12

Rudder Hinging ......................................................................................................................................................12

Rudder Servo Installation .......................................................................................................................................12

Elevator Servo Installation ......................................................................................................................................13

Main Retract Installation ........................................................................................................................................13

Nose Gear Retract Installation ................................................................................................................................14

Battery, Receiver and Retract Module Installation ...................................................................................................14

Fuel Tank Assembly ...............................................................................................................................................15

Elevator and Rudder Extension Installation .............................................................................................................17

Turbine Installation ................................................................................................................................................17

Fin Installation .......................................................................................................................................................18

Stabilizer Installation ..............................................................................................................................................18

Joining the Fuselage ..............................................................................................................................................19

Wing Installation ....................................................................................................................................................19

Intake Installation ..................................................................................................................................................20

Scale Accessories ..................................................................................................................................................20

Center of Gravity ....................................................................................................................................................21

Nose weight ..........................................................................................................................................................21

Control Throws ......................................................................................................................................................21

Mixing ...................................................................................................................................................................22

Preﬂ ight Checklist ..................................................................................................................................................22

Daily Flight Checks ................................................................................................................................................22

Limited Warranty ...................................................................................................................................................22

Warranty and Service Contact Information .............................................................................................................23

Instructions for Disposal of WEEE by Users in the European Union ..........................................................................23

Academy of Model Aeronautics National Model Aircraft Safety Code .......................................................................24

Building Notes .......................................................................................................................................................24

REPLACEMENT PARTS

Item # Description

HAN339001 Fuselage

HAN339002 Wing Set

HAN339003 Fin and Rudder

HAN339004 Stab and Elev Set

HAN339005 Retract Set

HAN339006 Retract Controller

HAN339007 Canopy Hatch

HAN339008 Canopy

HAN339009 Joiner Tube Set

HAN339010 Air Intakes (2)

HAN339011 Tip Tanks (2)

HAN339012 Tailpipe

HAN339013 Fuel Tank

HAN339014 Hardware Set

HAN339015 Retract Motor

HAN339016 Nose Wheel (65mm)

HAN339017 Main Wheel (65mm) with Brake (1)

HAN339018 Main Retracts / Struts (2)

HAN339019 Nose Retract with Strut

HAN339020 Fuselage Hatch; Upper

HAN339021 Fuselage Hatch; Lower

HAN339022 Main Tire Set (2)

HAN339023 Ventral Fin Set

HAN339024 Decal Sheet

REQUIRED ADHESIVES

Description

15-minute epoxy

30-minute epoxy

Canopy Glue

Thin CA

Medium CA

Threadlock, low and high strength

4EN

REMOVING WRINKLES

The covering of your model may develop wrinkles during shipping and will require the use of a heat gun (HAN100)

and covering glove (HAN150) or covering iron with a sealing iron sock (HAN141) to remove them. Use caution while

working around areas where the colors overlap to prevent separating the colors. Avoid using too much heat, which

could separate the colors. Placing a cool damp cloth on adjacent colors will also help in preventing the separation of

the colors while removing wrinkles.

BUILDING PRECAUTIONS

Prepare the work surface prior to beginning the build. The surface should be soft and free of any sharp objects. We

recommend resting the airframe parts on a soft towel or pit mat to prevent scratching or denting the surface of the

aircraft.

TRANSPORTATION AND STORAGE

Use the three-view drawing on page 90 to determine how much room will be required to transport and store your

model. We also recommend the use of wing and stabilizer bags to help protect these surfaces during transport and

storage. The control horns and linkages can cause damage to other surfaces even when placed in storage bags.

Always transport and store the wings and stabilizer so the linkages do not contact other panels to prevent damage.

CHECKING BLIND NUTS

When building the aircraft, you will be required to thread machine screws into blind nuts. We recommend pre-threading

the screws to make sure the blind nuts are clear of any debris. If the screws do not thread in easily, clear the threads

using the appropriate tap and tap handle.

REPLACEMENT COVERING

Your model is covered with UltraCote® ﬁ lm in the following colors. If repairs are required, order these coverings to

make those repairs.

HANU870 White

HANU877 Orange

HANU873 Deep Blue

TOOLS REQUIRED

Description

Drill and tap set, metric

Drill bit set, Imperial or Metric

Epoxy brushes

Felt-tipped pen

Hemostats

Hex wrench set, Imperial and Metric

Hobby knife with #11 blade

Hook and loop straps

Hook and loop tape

Isopropyl alcohol

Low-tack tape

Mixing sticks

Needle nose pliers

Nut driver set, Imperial and Metric

Paper towels

Pencil

Petroleum jelly

Phillips screwdriver: #1, #2

Pin vise

Ruler

Sandpaper

REQUIRED FOR COMPLETION

# Required Item # Description

1 DUB674 Super Strength Standard Servo Arms: JR

1 DUB675 Super Strength Standard Servo Arms: HRC

2 SPMA3002 Heavy-Duty Servo Extension 9-inch

1 SPMA3003 Heavy-Duty Servo Extension 12-inch

9 SPMA3004 Heavy-Duty Servo Extension 18-inch

3 SPMA3007 Heavy-Duty Servo Extension 48-inch

1 SPMAR14400T AR14400T 14 Channel PowerSafe Telemetry Receiver

4 SPMSA5080 A5080 MT/HS Mini Digital HV Servo (elevators, rudder and nose steering)

4 SPMSA6320 A6320 H-T/H-S Brushless HV Servo (ailerons and ﬂ aps)

3SPMX20002SRX 7.4V 2000mAh 2S 15C Smart LiPo Receiver Battery: Universal Receiver,

IC3(Receiver x2 and Retracts x1)

1SPMX32003SLFRX 9.9V 3200mAh 3S 15C Smart LiFe ECU Battery: Universal Receiver, IC3

(Turbine)

1 60-85N Turbine

1 Air Trap

1 HAN116 Fuel Filler with “T” Fitting and Overﬂ ow Fitting

TOOLS REQUIRED

Description

Scissors

Side cutters

Square

Tap handle

Tie wraps

Toothpicks

Wire stripper

5 EN

Aermacchi MB-339 60–85N

6. Remove the ﬂ ap and hinges. Inject adhesive into each of the

hinge pockets of the ﬂ ap.

Deluxe Materials Aero Tech Epoxy

(DLMAD64) is recommended.

7. Inject adhesive into each of the hinge pockets of the wing.

8. Apply a small amount of adhesive to each hinge where it will

enter the ﬂ ap and wing.

9. Place the hinges in the ﬂ ap, then join the ﬂ ap to the wing.

Check the alignment as outlined in Step 5.

FLAP HINGING

1. Remove the ﬂ ap and ﬂ ap hinges from the wing panel.

The hinges are not glued to the wing or flap.

Optional: Apply a piece of white covering

for a more finished appearance.

2. Use a hobby knife and covering iron to seal the covering into

the recessed control horn mounting area on the leading edge

of the ﬂ ap.

3. Check the hinges to make sure they operate freely. Adjust the

tension of the screw if any hinges do not move freely. Apply

a small amount of petroleum jelly to the hinge ﬂ ex points to

prevent adhesive from entering the hinge.

4. Check the ﬁ t of the ﬂ ap to the wing using the hinges. The

ﬂ ap will align with the wing root. The hinge gap will be equal

along the length of the ﬂ ap.

Do not apply any adhesives until instructed to do so.

5. Check the gaps between the aileron and ﬂ ap, and the wing

root and ﬂ ap. The ﬂ ap will also align with the trailing edge at

the aileron and wing root. The ﬂ ap and wing lower surfaces

will align.

6EN

AILERON CONTROL HORN AND HINGING

11. Remove the aileron and aileron hinges from the wing.

10. Use a paper towel and isopropyl alcohol to remove any

excess adhesive. Use low-tack tape to hold the ﬂ ap in

position until the adhesive fully cures.

12. Lightly rub a ﬁ nger over the bottom of the aileron to locate

the mounting slots for the aileron control horns. Use a hobby

knife and #11 blade to remove the covering for the aileron

control horns.

13. Lightly sand the area of the aileron control horns where they

ﬁ t into the aileron. (The aileron control horns are the longest

horns included.)

14. Use a paper towel and isopropyl alcohol to remove any oils or

debris from the control horn. Prepare all four aileron control

horns.

15. Test ﬁ t the aileron control horn. They should ﬁ t completely

into the slot as shown. If they don’t ﬁ t, use a ﬁ le to enlarge

the slot. Do not force the horn into place.

16. Snap the aluminum ball into the plastic ball end.

Apply a drop of light machine oil to the ball to

allow it to move freely in the plastic ball end.

17. Slide an M3 x 15 button head machine screw into the ball.

It may be necessary to use a small round ﬁ le to remove any

burrs from inside the aluminum ball. Prepare two ball ends.

18. Slide an M3 washer on the M3 x 15 button head machine

screw. Pass the screws into one of the control horns, then

slide the ball end on the screw.

19. Slide the remaining control horn on the M3 x 15 button head

machine screw. Secure the assembly using an M3 washer

and an M3 locknut.

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Aermacchi MB-339 60–85N

20. Slide the control horn base on the bottom of the control horn

assembly.

21. Fit the assembly into the slots in the aileron.

22. Place low-tack tape around the control horn base. This will

help keep excess epoxy off the aileron.

23. Remove the assembly and mix 1/2 ounce (15ml) of 30-minute

epoxy. Apply epoxy in the control horn slots.

24. Apply epoxy to all the surfaces of the control horns that will

contact the exposed wood of the aileron.

25. Fit the assembly into the aileron. Use a paper towel and

isopropyl alcohol to remove any excess epoxy. Allow the

epoxy to cure, then remove the tape.

26. Hinge the ailerons using the same technique outlined for the

ﬂ ap hinges. Make sure the aileron is aligned with the ﬂ ap.

27. Make sure hinge gap is consistent along the entire length of

the aileron. Use low-tack tape to hold the aileron in position

until the adhesive has fully cured.

Trial fitting the tip tank at this stage allows for the

installation of the aileron and verification that the

aileron will not come in contact with the tip tank.

AILERON SERVO INSTALLATION

28. Remove the covering for the servo arm in the aileron servo

cover using a hobby knife and #11 blade.

29. Place the aileron servo on the cover and use a felt-tipped

pen to mark the locations for the mounting screws. The servo

output will face forward.

8EN

5/8 inch

(16mm)

30. Remove the servo and use a pin vise with a 1/16-inch

(1.5mm) drill bit to drill the four servo mounting holes.

31. Thread a servo mounting screw into each hole, then remove

the screws.

32. Apply 1–2 drops of thin CA in each hole to harden the

surrounding wood. Allow the CA to fully cure before

proceeding.

33. Mount the servo using the screws provided with the servo.

Center the servo and attach the servo arm perpendicular to

the servo centerline. Remove any arms that will interfere with

the operation of the servo.

34. When connecting the clevis to the servo arm, use the hole

that is 5/8 inch (16mm) from the center of the servo arm.

35. Secure a 12-inch (300mm) servo extension to the servo lead

using a Servo Connector Clip (SPMA3054).

37. Remove the cover for the ﬂ ap servo. Use the string to pull the

extension to the opening for the ﬂ ap servo.

36. Tie the string inside the wing to the end of the extension.

38. Use a toothpick or hobby knife with a #11 blade to puncture

the aileron servo cover for the mounting screws.

39. Place the aileron servo cover in position and drill through the

mounting locations and into the wing using a pin vise and

3/64-inch (1.2mm) drill bit.

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Aermacchi MB-339 60–85N

40. Use a #1 Phillips screwdriver to thread an M2 x 8 self-tapping

screw into each of the holes. Remove the screws before

proceeding.

Do not apply too much force when installing these screws,

as it may damage the wooden servo hatch frame.

41. Apply 1–2 drops of thin CA in each hole to harden the

surrounding wood. Allow the CA to fully cure before

proceeding.

42. Secure the aileron servo cover using a #1 Phillips screwdriver

and four M2 x 8 self-tapping screws.

45. Attach the ball end to the control horn, then the clevis to the

servo arm. With the radio system on and the aileron servo

centered, adjust the linkage to center the aileron. Once

adjusted, slide the silicone retainer over the forks of the

clevis.

FLAP SERVO INSTALLATION

Before starting the flap servo installation, ensure the

Flap System travel is zero for all switch positions.

46. Snap the aluminum ball into the plastic ball end.

Apply a drop of light machine oil to the ball to

allow it to move freely in the plastic ball end.

48. Remove any tape from the wing and ﬂ ap. Assemble the ﬂ ap

linkage using two prepared ball ends and an 80mm threaded

rod. Thread the ball ends equally on the threaded rod until the

length is approximately 41/4 inches (108mm).

49. Center the ﬂ ap servo using the radio system. Fit the ﬂ ap

servo arm on the servo so it is perpendicular to the servo

centerline.

47. Slide an M3 x 15 button head machine screw into the ball. It

may be necessary to use a small round ﬁ le to remove the any

burrs from inside the aluminum ball. Prepare four ball ends.

43. Slide a silicone retainer on the metal clevis. Thread the clevis

on the 70mm threaded rod (on the end with the nut) until the

end of the threaded rod is visible between the forks of the

clevis.

44. Remove the ball from the aileron control horn. Assemble the

linkage so the length is 33/4 inches (95mm).

33/4 inches (95mm)

41/4 inches (108mm)

10EN

5/8 inch

(16mm)

50. Place the ﬂ ap servo into position with the output forward. Use

side cutters to remove the excess servo arm extending out of

the servo opening.

51. Attach the ball end to the servo arm using an M3 x 15

machine screw, M3 washer and M3 locknut. Tighten the

hardware using a 2mm hex wrench and 5.5mm nut driver.

Make sure not to overtighten the hardware.

The washers must be installed as shown to prevent

the ball from popping out of the ball end.

Trim any excess servo arm extending beyond the ball end.

When connecting the clevis to the servo arm, use the hole

that is 5/8 inch (16mm) from the center of the servo arm.

53. Guide the servo lead for the ﬂ ap and aileron through the wing

to the wing root.

52. Install the ﬂ ap servo with the output forward. Use the

hardware included with the servo.

54. Center the servo using the radio system. Place the servo arm

on the servo so it is one spline toward the trailing edge of the

wing.

Do not secure the servo arm to the

servo until instructed to do so.

55. Position the linkage so it is perpendicular to the ﬂ ap hinge

line.

56. While holding the linkage, deﬂ ect the ﬂ ap. Use a felt-tipped

pen to mark the location of the ball end on the bottom of the

wing.

57. Use a felt-tipped pen to transfer the mark onto the ﬂ ap and

into ﬂ ap control horn mounting area.

58. Position the ﬂ ap control horn on the ﬂ at area of the ﬂ ap,

centered with the mark made in the previous step. Slide the

ﬂ ap control horn toward the bottom of the ﬂ ap with the ﬂ at

portion of the control horn facing the bottom of the wing.

Mark the location of the ﬂ ap horn mounting screws using a

felt-tipped pen.

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Aermacchi MB-339 60–85N

59. Place the horn aside. Use a 1/16-inch (1.5mm) drill bit to drill

the two holes for the ﬂ ap control horn mounting screws.

60. Use a #1 Phillips screwdriver to thread an M3 x 14 self-

tapping screw into each hole. Remove the screws before

proceeding.

61. Place 2–3 drops of thin CA in each hole. Allow the CA to fully

cure before proceeding.

63. Secure the ball link to the ﬂ ap control horn using an M3 x 15

machine screw and M3 washer. Use a 2mm hex wrench to

tighten the screw.

The servo horn can be removed from the

servo to manipulate the linkage.

64. Adjust the linkage for the mid ﬂ ap position of 1 inch (25mm).

Once adjusted, secure the servo arm to the servo

using the hardware included with the servo.

65. Set the travel on the transmitter to the ﬂ aps up position.

Adjust the values at the transmitter to align the ﬂ ap to the

wing trailing edge.

62. Secure the ﬂ ap control horn to the ﬂ ap using two M3 x 14

self-tapping screws and a #1 Phillips screwdriver. Note the

orientation of the ﬂ ap control horn.

66. Set the travel on the transmitter to achieve full ﬂ ap deﬂ ection

of 23/4 inch (70mm).

12EN

67. Attach the servo cover to the wing using four M2 x 8mm self-

tapping screws.

ELEVATOR HINGING

68. Separate the elevator from the stabilizer. Set the hinges aside.

69. Install the control horn for the elevator using the techniques

used for the aileron control horn.

70. Use the same technique as the ﬂ ap hinges to secure the

elevator hinges. Make sure to remove any excess adhesive

from the hinges using a paper towel and isopropyl alcohol.

Use low-tack tape to hold the elevator in position until the

adhesive has fully cured.

RUDDER HINGING

71. Separate the rudder from the ﬁ n. Set the hinges aside.

72. Install the control horn for the rudder using the techniques

used for the aileron control horn.

73. When installing the rudder hinges, note that the bottom hinge

has been shortened to ﬁ t behind the ﬁ n joiner tube.

74. Use the same technique as the ﬂ ap hinges to secure the

rudder hinges. Make sure to remove any excess adhesive

from the hinges using a paper towel and isopropyl alcohol.

Use low-tack tape to hold the rudder in position until the

adhesive has fully cured.

RUDDER SERVO INSTALLATION

75. Mount the rudder servo following the instructions in the

aileron servo installation. The output of the rudder servo will

face forward.

76. Secure the rudder servo in the ﬁ n following the instructions in

the aileron servo installation section.

13 EN

Aermacchi MB-339 60–85N

77. Assemble the rudder servo linkage. Use a 35mm threaded

rod and adjust the linkage to an overall length of 65mm.

Adjust the length of the linkage as necessary to center the

rudder with the radio system on.

When connecting the ball end to the servo arm, use the hole

that is 13/16 inch (20mm) from the center of the servo arm.

ELEVATOR SERVO INSTALLATION

78. Use a hobby knife and #11 blade to remove the covering for

the elevator servo arm.

79. Mount the elevator servo in the stabilizer with the servo

output facing forward.

Caution: Use care when locating the servo mounting holes

so they are evenly spaced from the notch for the servo lead.

80. Assemble the elevator servo linkage following the instructions

in the aileron servo installation. Use a 40mm threaded rod

and adjust the linkage to an overall length of 65mm. Adjust

the length of the linkage as necessary to center the elevator

with the radio system on.

When connecting the clevis to the servo arm, use the hole

that is 13/16 inch (20mm) from the center of the servo arm.

MAIN RETRACT INSTALLATION

81. Assemble an adapter to power the retract module. Use the

connector supplied with the retract module and a connector

compatible to the battery chosen to power the module.

Make sure to double check the polarity, as reverse

polarity will damage the retract unit beyond repair.

82. Use a hobby knife or sandpaper to sand a slight taper on each

of the plugs on the leads (included with the retract module)

that will connect to the receiver to the retract module.

83. Remove the covering from the retract well on the bottom of

the wing using a hobby knife with a #11 blade. Leave enough

covering to seal into the wheel well. Use a covering iron to

seal the covering around the opening.

84. Route the brake lead and control lead from the retract into

the wing.

The excess lead can be coiled and secured

with a zip tie in the wing root.

85. Retrieve the leads from the same location as the ﬂ ap and

aileron leads. Make sure to label the leads so they can be

identiﬁ ed when assembling the model for ﬂ ight.

86. Prepare the retract mounting screws by sliding a 4mm lock

washer, then a 4mm washer on the M4 x 20 socket head cap

screws. Prepare all four mounting screws.

14EN

87. Secure the retract in the wing using the four screws prepared

in the previous step and a 3mm hex wrench.

Use threadlock on the screws to prevent

them from vibrating loose.

Do not overtighten the retract mounting screws.

88. Check the operation of the retract using the retract module.

A test button is located on the module, or the module can be

connected to the receiver to check the retract operation.

NOSE GEAR RETRACT INSTALLATION

89. Remove the canopy from the forward fuselage. Set the

canopy aside in a safe location.

90. Mount the steering servo in the retract servo opening using

four M3 x 12 button head screws. Apply a drop of threadlock

on each screw, then tighten the screws using a 2mm hex

wrench.

Some servos may require the orientation to be

reversed to avoid contacting the retract unit. To

do so may require a different length pushrod.

91. Assemble the steering linkage and attach it to the servo arm

using an M3 x 15 button head screw, M3 washer and M3 lock

nut. Use a 2mm hex wrench and 5.5mm nut driver.

92. Snap the ball on the steering arm of the retract. Center the

steering servo and adjust the length of the linkage to center

the nose gear.

Make sure to adjust the servo travel so equal

defection is achieved in each direction. Also make

sure the servo is not over traveling as this may

damage the ball attached to the nose leg.

93. Fit the retract into the forward fuselage. Make sure all the

leads are inside the fuselage and not between the retract

frame and fuselage.

94. Route the leads for the retract and servo on opposite sides of

the fuselage.

95. Secure the retract using four 4mm lock washers, four 4mm

washers and four M4 x 20 socket head cap screws. Tighten

the screws using a 3mm hex wrench.

Use threadlock on the screws to prevent

them from vibrating loose.

Do not overtighten the retract mounting screws.

BATTERY, RECEIVER AND

RETRACT MODULE INSTALLATION

96. Mount the batteries for the receiver and retract module in the

front of the fuselage using hook and loop tape, and hook and

loop straps.

15 EN

Aermacchi MB-339 60–85N

97. The retract module can be mounted forward of the aft edge

of the nose section. Make sure access to the connecting bolts

are not blocked. Use a switch between the retract battery and

retract module so the retract system can be switched on or

off.

99. Mount the receiver switch in a convenient location in the

fuselage. One of the remote receivers can be secured in the

forward section of the forward fuselage using hook and loop

tape.

100. Mount a second remote receiver in the fuselage using hook

and loop tape. Make sure the antennas are oriented in

different directions.

FUEL TANK ASSEMBLY

101. Locate the rubber stopper, aluminum backplate and

aluminum cap.

98. Mount the receiver in the fuselage following the instructions

provided with the receiver.

The leads between the retract module and

receiver can be connected, as well as the

receiver batteries and nose gear steering.

Connect the leads for the main gear retracts and

brakes, as well as the connections to the receiver.

102. Slide a long tube and a short tube through the rubber stopper.

(The center hole is for the screw that secures the assembly in

the tank.) Fit the aluminum backplate on the tubes from the

unﬂ anged end of the stopper. The aluminum front plate slides

on the tubes from the ﬂ anged end of the stopper.

103. Use a tubing bender to bend the longer (vent) tube upwards.

104. Check the bend in the tubing to make sure it does not touch

the top of the tank.

105. Use a soldering iron and solder to create an area on each of

the tubes (both outside, and the unbent tube inside the tank)

so the fuel tubing can be secured to the tubes.

106. Cut a piece of fuel tubing and slide it on the clunk line for the

fuel tank. Fit the clunk and measure the length shown. Adjust

the length of the tubing to achieve the measurement. 101/2 inches (267mm)

16EN

107. Use a wire tie to secure the fuel line to the brass fuel line. 112. Mount the fuel tank tray in the fuselage from the bottom

using the four knurled screws.

113. Pass the three tie wraps around the fuel tank tray so the fuel

tank can be secured to the fuel tank tray.

114. Slide the fuel tank into the fuselage. Use a small amount of

silicone adhesive between the tray and tank to keep it from

sliding on the tray during ﬂ ight.

115. Adjust the position of the tank so the top hatch can be

installed.

116. Secure the tank using the tie wraps. Trim the excess using

side cutters.

108. Use a wire tie to secure the fuel line to the clunk.

109. Fit the stopper in the tank and check that the clunk can move

freely in the tank. Adjust if necessary. Secure the stopper

using the M3 x 25 socket head cap screw. Tighten the screw

using a 2.5mm hex wrench.

Do not overtighten the screw and damage the fuel tank.

110. Remove the hatch from the bottom of the rear fuselage and

set it aside in a safe location.

111. Remove the hatch from the top of the rear fuselage and set it

aside in a safe location.

17 EN

Aermacchi MB-339 60–85N

117. Remove the covering for the ﬁ ll and vent ﬁ ttings using a

hobby knife and #11 blade. Mount the ﬁ ttings and connect

the lines from the tank.

It may be necessary to enlarge the holes to install the fittings.

ELEVATOR AND RUDDER EXTENSION INSTALLATION

118. Locate the servo wire routing sleeve in the rear fuselage

in the ﬁ n location. Tie the string to a 48 inch (1200mm)

extension.

119. Wrap tape around the connection between the plug and string

to make pulling the extension through the sleeve easier.

120. Use the string to pull the extension through the sleeve. Be

careful not to break the string.

121. Locate the servo routing sleeve in the rear fuselage in the

stabilizer location. Tie the string to two 48 inch (1200mm)

extensions. Make sure the plugs connect to the receiver.

122. Use the string to pull the extensions through the sleeve. Be

careful not to break the string.

123. Slide the servo routing sleeves as far back as possible.

Mark the sleeves at the bulkhead so the positioning can be

checked before each ﬂ ying session. Use tie wraps to secure

the sleeves to the structure above the location for the thrust

tube, so they don’t come in contact with the exhaust tube

during the operation of your model.

TURBINE INSTALLATION

124. Fit the exhaust guard to the rear of the fuselage so it equally

covers the fuselage. Secure the guard using two M3 x 12

self-tapping screws.

Failure to fit the exhaust guard will result in

heat damage to the wood and covering above

the tailpipe at the rear of the fuselage.

125. Slide the exhaust tube into the rear fuselage from the front of

the fuselage.

126. Align the end of the exhaust tube so it extends 1/4 to 1/2 inch

(6mm to 13mm) beyond the fuselage former at the rear.

It may be necessary to slide a thin steel ruler (or

similar) between the exhaust tube and opening in the

fuselage to aid the tailpipe fitting through the end

fuselage former. This is designed to be a snug fit.

18EN

127. Space the exhaust tube equally between the sides of the

fuselage. Secure the tube using four M3 x 12 self-tapping

screws.

128. Position the turbine so the distance between the tail cone and

exhaust tube match the recommendations from the turbine

manufacturer.

The mounting rails can be modified to fit a variety of turbines.

130. Mount the fuel pump in the fuselage and connect any fuel

lines necessary for the operation of the turbine. Connect the

vent line from the tank. Secure all connections using wire

ties.

Do not use tie wraps to secure the fuel lines.

129. Position the turbine in accordance to the distance relative to

the tailpipe stated in the operations manual of your turbine

manufacturer.

FIN INSTALLATION

131. Secure the lead from the rudder servo and extension using a

commercially available retainer.

132. Mix 1/2 ounce (15ml) of 30-minute epoxy. Use an epoxy

brush to apply epoxy in the tubes in the fuselage for the ﬁ n

and to the surrounding wood.

133. Fit the ﬁ n into position. Place a small piece of plastic in the

hinge line and along the bottom of the rudder to prevent

gluing the rudder to the fuselage. Remove any excess epoxy

using a paper towel and isopropyl alcohol.

STABILIZER INSTALLATION

134. Insert the stabilizer tube in the socket in the rear of the

fuselage. Center the tube in the fuselage.

135. Connect the lead from the elevator servo and extension using

a commercially available fastener. Slide the stabilizer on

the tube. Use a 3mm hex wrench to tighten the screw that

secures the stabilizer to the fuselage.

The screw may require loosening to install the stabilizer.

136. Insert the stabilizer screw grommet using a small amount of

silicone adhesive.

19 EN

Aermacchi MB-339 60–85N

JOINING THE FUSELAGE

137. Slide the four fuselage joining tubes into the front half of the

fuselage.

138. Prepare the ﬁ ve screws that secure the forward fuselage to

the rear fuselage by sliding a tapered washer on an M4 x 20

socket head cap screw.

140. Secure the fuselage section using the ﬁ ve screws prepared

earlier. Tighten the screws using a 3mm hex wrench.

Use threadlock to keep the screws from vibrating loose.

Check the screws periodically to ensure they remain secure.

139. Slide the forward fuselage into position on the rear fuselage.

141. Mount the remote receiver above the fuel tank using hook

and loop tape. Connect any extensions for the ﬂ aps, ailerons,

retracts and brakes and route them through the fuselage.

142. Place the canopy hatch in position on the fuselage.

WING INSTALLATION

143. Slide the wing tube into the socket in the wing. Do not force

the tube in farther than it will easily slide.

144. Slide the tube into the socket in the fuselage. Connect the

leads for the aileron and ﬂ ap to the extensions. Guide the

leads for the retract and brake into the fuselage.

145. Slide the wing against the fuselage.

146. Use the two 1/4-20 x 2-inch nylon bolts to secure the wing to

the fuselage.

20EN

147. Connect the leads for the retract and brake inside the

fuselage.

151. Attach the tip tank using the screws and a 3mm hex wrench.

INTAKE INSTALLATION

148. Fit the intake to the wing. There will be space of 1/4-inch

(6mm) at the rear corner near the fuselage.

The top of the intake is longer than the bottom.

152. Use a hobby knife and #11 blade to remove the covering for

the VOR blade antenna in the ﬁ n. Glue the antenna to the ﬁ n

using medium CA. Use a square to make sure the antenna are

aligned correctly on both sides of the ﬁ n.

The antenna are cosmetic and their installation is optional.

153. Slide a 4mm lock washer and 4mm washer on the M4 x 20

socket head cap screw for the ventral ﬁ n attachment. Prepare

all four screws.

149. Use a pin vise and 1/16-inch (1.5mm) to drill to drill the

locations in the intake into the wing. Remove the intake and

thread an M2 x 8 self-tapping screw into each hole. Remove

the screws and place a drop of thin CA in each hole. Once the

CA has fully cured, secure the intake to the wing using twelve

M2 x 8 self-tapping screws.

154. Use the screws and a 3mm hex wrench to attach the ventral

ﬁ ns to the bottom of the fuselage.

Remove the ventral fins for transport.

SCALE ACCESSORIES

150. Prepare the wing tip tank bolts by sliding a 4mm lock washer

on the M4 x 20 socket head cap screws.

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