Juniaer T-27 tucano 20cc Installation guide

T-27 Tucano 20cc 1.2 2022

www.juniaer.com.br

A traditional 20cc sport/scale category model airplane!

Lots of incredible detail in this classic model airplane with scale, acrobatic and sport flight

capabilities, bringing precise and smooth performance for the intermediate to advanced level

model airplane pilot.

T-27 Tucano 20cc 1.2 2022

www.juniaer.com.br

Assembly instructions manual and guideline

T-27 Tucano 20cc

Index

Presentation.................................................................................

Important warnings......................................................................

Specifications................................................................................

Disclaimer.....................................................................................

Kit contents...................................................................................

Gas burning engine installation ...................................................

2 cycle glow engine installation....................................................

4 cycle glow engine installation....................................................

Electric motor installation.............................................................

Engine cowling installation...........................................................

JC Super Props..............................................................................

Fuel tank installation....................................................................

Li-Po batteries for electric motors................................................

Servos, linkage, fixing points and commands...............................

Ailerons and flaps.........................................................................

Elevators.......................................................................................

Rudder..........................................................................................

Retracts installation......................................................................

Landing gear doors installation.....................................................

C.G. (Center of gravity) .................................................................

LR Ideas scale lightning system.....................................................

Scale lightning system and clear wing lenses installation.............

Fuselage on-board equipment......................................................

Fuselage side door........................................................................

Cockpit and canopy installation....................................................

Juniaer´s pilot busts......................................................................

Flábio scale cockpits.....................................................................

Pitot tubes replicas.......................................................................

Juniaer´s protection and transport covers....................................

T-27 Tucano 20cc 1.2 2022

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This is the T-27 Tucano 20cc ARF Juniaer, prepared for retracts installation, with flaps, with an exquisite

finishing and many painting schemes available, very realistic and all detailed in relief, with rivets, antennas, side

door with hinge and lock (not installed), panel lines, compartments, pitot tubes replicas, landing gear doors,

paneled cockpit and clear canopy. Engine cowling in 2 parts with exhaust replicas. Model airplane made of high-

quality epoxy resin with structural reinforcements, low weight and high resistance due to the FULL COMPOSITE

high technology vacuum lamination technique. 2-piece wing (1 aluminum tube on the wing) laminated in

fiberglass and epoxy resin with carbon fiber reinforcements and laser-cut plywood and balsa structures.

Laminated stabilizer in fiberglass and epoxy resin with carbon fiber reinforcements and structures in plywood

and balsa laser cut in a single piece to be permanently glued to the fuselage. Clear canopy, resin made canopy

frame and cockpit with instruments panels. Ailerons, flaps e and elevators factory hinged in perfect align.

Rudder to be epoxy glued in 3 hinge points provided with the kit. Servo tray and fuel tank tray made of laser cut

plywood. Exquisite automotive painting finishing, scale decals and markings and varnished for long lasting.

Stable, realistic and acrobatic flight pattern. Capable of many maneuvers such as slow rolls, rolls, Cuban eights,

knife edge flight, inverted flight and much more. This model airplane was developed and built to provide a high

performance both for pleasant flights as for wealth of details and realism. It´s construction and made with

specific high-quality materials and advanced composite lamination techniques to provide low weight and high

structural strength.

The Juniaer model airplanes are painted and varnished with high quality and resistance products. Even so,

some care must be taken to protect the paint: wipe your model with a cloth immediately after use with water

sprays and neutral detergent. Fuels can damage the varnish if it penetrates punctures or damages to the plane's

surface, as well as cuts in the engine's cowling. To prevent this kind of problem, we recommend brushing two-

component PU varnish or applying epoxy to areas that are uncovered for any reason. Avoid exposing the model

to direct sunlight as much as possible, especially the darker painted parts that accumulate and reflect a greater

amount of heat, causing an internal and external temperature raising. The use of automotive wax for polishing

is useful in preventing the accumulation of dirt and facilitates the cleaning and protection of the varnish. We

suggest the use of fabric smooth covers for storage and transport, in order to protect against damage and risks.

Be careful when handling your model airplane, especially the movable control surfaces. Never lift it by the two

wing tips only, as the total weight is considerable to be supported only by 2 distant points. When checking the

model airplane´s balance through the center of gravity (C.G.) always support it by the roots of the wing at the

indicated points.

Please read this manual to the end before doing anything on your model airplane, it contains important

information regarding assembly and use, and it will also give you an overview of what should be done correctly

and following the guidelines.

Please check and identify all parts of your model airplane when you receive it. If any parts are damaged or

defective, please contact our customer service. Your model aircraft has a 90-day factory warranty against

manufacturing defects. Juniaer Model Airplanes guarantees that this kit is free from manufacturing defects in

both material and workmanship at the date of purchase. This warranty does not cover any components

damaged by use or modifications. In no event will Juniaer's liability exceed the original cost of the kit purchased.

In addition, Juniaer Model Airplanes reserves the right to change this warranty without prior notice. Since

Juniaer Model Airplanes has no control over the final assembly or the equipment used for the final assembly,

no liability will be assumed or accepted for any damages resulting from the user's use of the final product

assembled by him or third parties. Through the act of using the assembled product by the user, he accepts all

responsibility for the result. If the buyer is not prepared to accept responsibility for the use of this product, it

must be returned immediately to the place of purchase in new and unused condition. This product is intended

for persons over 18 years old and any procedure involved in its assembly and use must be monitored by an

adult.

T-27 Tucano 20cc 1.2 2022

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This is not a beginner´s model aircraft, despite having a very stable flight performance and low speed stall

point, it is a complex model with many mechanical and electronic devices and must be assembled and flown by

someone with experience and knowledge in the area of model airplanes setup and flying. Never consider this

product as a toy. If in any case you do not feel 100% sure of what you are doing, if there are any unanswered

questions or any other problem, please DO NOT PROCEED!!! Look for our guidance or any professional in the

field. Any equipment badly installed, or problematic may cause the total or partial loss of the model, and serious

consequences for people and properties around the flight area. If you want more information about insurance,

legislation, rules and security procedures, look for the Academy of Model Aeronautics www.modelaircraft.org

Telephones Tel.: (765) 287-1256 / (800) 435-9262 Fax.: (765) 289-4248, which may indicate clubs with a

structure that includes qualified flight instructors accredited to issue the operational license for model pilots

that includes insurance.

Always check the operation of the model aircraft before all flights to ensure that the equipment is working

perfectly and that the structure is intact. Always check all links, connectors and control surfaces and replace any

component that shows signs of fatigue or wear.

VERY IMPORTANT: Juniaer Modelismo provides a high-quality kit with instructions, but the quality of the

finished model depends on how it is assembled, therefore, the manufacturer and its dealers cannot under any

circumstances guarantee the performance of the completed model. No complaints will be accepted regarding

the performance and safety of the model aircraft after it has been assembled. “Juniaer”, “Juniaer Modelismo”

and “Juniaer - Art in model airplanes”, as well as the logo, are registered trademarks of Juniaer industry,

Juniaer Modelism

Telephone: +55 (35) 3591-1036

e-mail: [email protected]

Specifications:

Wingspan: 1790 mm ( 70.47 in)

Length: 1400 mm; 1480mm with spinner (55.12 in; 58.27 with spinner)

Wing Area: 49,8 dm2(772 sq in)

Wing Loading: 90,36 g/dm2to 100,40 g/dm2(29.61 oz/sq ft to 32.83 oz/sq ft)

Spinner: 63,5 mm (2 1/2”)

Engines: Gas burning 20cc 2 cycle, 90 to 100 glow 2 cycle, 100 to 125 4 cycle or electric proportional.

Weight: approx. 2,80 Kg (6,17 lb). Flying weight: 4,50 to 5,00 Kg (9,92 lb to 11 lb) (depends on installed

accessories).

Radio: 7 channels minimum for limited installation. 9 or more channels for complete installation (not

included).

Servos: Electric motor or glow engine: 6 standard size servos 4,5 kg-cm or more torque (in case of electric

motor 5 standard servos) and 2 mini servos 4 kg-cm or more torque. Nylon gears can be used.

Gas burning engine: 6 standard servos 5 kg-cm torque and 2 mini servos 4 kg-cm or more torque.

All servos shall be metal geared.

T-27 Tucano 20cc 1.2 2022

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DISCLAIMER

In Brazil, model airplane activity for recreational purposes is regulated by ANAC (National Civil

Aviation Agency) through the Special Brazilian Civil Aviation Regulation RBAC-E No. 94 that entered

into force on July 1, 2021, or subsequent substitutive document.

Important information is contained in subparts E94.3 Definitions; E94.103 General rules for the

operation of unmanned aircraft; E94.301 Registration and cadastre and E94.501 General

provisions.

The Ministry of Defense, Aeronautics Command, Department of Air Space Control regulates the

procedures and responsibilities necessary for access to Brazilian Air Space by unmanned aircraft

with use exclusively for recreation, the so-called model aircraft through the MCA 56-2 manual that

entered into force on July 1, 2020, or subsequent substitutive document.

The radio control equipment used in model airplanes, according to the General

Telecommunications Law (Law nº 9.472, of July 16, 1997) must be approved through a certification

issued or accepted by ANATEL (National Telecommunications Agency). Information about this

procedure can be obtained from the Certification and Numbering Management –ORCN ANATEL or

by e-mail: [email protected].br.

We recommend reading the documents cited for legal information about the operation of your

model aircraft and the use of Brazilian airspace. For residents in other countries, we recommend

researching local legislation, regulations and safety recommendations. Also look for FAI - World

Airsports Federation www.fai.org .

All images, drawings and photos are for illustrative purposes only. Appearance and features of

the product depend on how it is assembled or used by the user. All specifications, features and

models described and shown are subject to change without notice.

Kit contents:

We recommend checking all items when you receive your model aircraft. Your T-27 Tucano 20cc Juniaer

consists of the following items:

1 instruction manual containing disclaimer

1 left wing

1 fuselage

1 set of left-wing landing gear doors

1 set of front landing gear doors

1 right wing

1 upper engine cowling with 4 screws

1 set of right-wing landing gear doors

1 lower engine cowling

1 aluminum tube diameter 25.4 mm

1 rudder

1 set of clear lenses

3 pin hinges for rudder

2 pitot tubes replicas

1 fuselage side door

2 ¼” x ¾” Allen screws for wing attachment

1 fuselage side door hinge

2 washers ¼” for wing attachment

1 spring latch for fuselage side door

1 stabilizer

1 cockpit

1 laser cut plywood servo tray

1 canopy frame

1 laser cut plywood tank tray

1 clear canopy

T-27 Tucano 20cc 1.2 2022

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Gas burning 2 cycle engine installation:

Suggestion: DLE-20RA engine –perfect fit with stock muffler.

Before installing your gas burning engine, please read the manufacturer's manual and all parts assembly

recommendations carefully including exhaust, standoffs, ignition, installation, operation and maintenance. The

information contained in this manual is extremely important.

The firewall of the model aircraft is provided in the correct location, with the correct angles for the engine

installation and has markings for 4 engine mount holes. The larger hole on the firewall is used for fuel lines

and fuel tank ventilation passage and it is not centered, so the engine mount screws holes shall be aligned on

the 4 4mm markings on the firewall. It is provided a 10mm plywood square part to be used with DLE-20RA to

position engine to the front, so the prop washer gets in correct alignment with the engine cowling. This plywood

part shall be glued to the firewall using 30 to 40 minutes epoxy glue, keeping the 4 engine mount marking holes

alignment. We recommend Great Planes 60 to 120 nylon adjustable mount (GPMG 1091) that includes screws,

washers and lock washers to hold the engine to the engine mount. To secure the engine mount to the firewall

and through the epoxy glued 10mm plywood part drill 4 5mm holes at indicated markings. Use 4 allen 10-32 x

1 ¼” screws (DUB 582), 4 10-32 blind nuts (DUB 584) and 4 washers on the screws.

Above: Great Planes adjustable engine mount with screws, washers and blind nuts (left) and engine mount in

position at the firewall with the square 10mm plywood part (right).

T-27 Tucano 20cc 1.2 2022

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Place the engine mount in inverted position (upside down) with the 4 10-32 x 1 ¼” screws with washers inside

the holes through the square 10mm plywood part and the firewall until the inner side at the fuselage. Thread

the 10-32 blind nuts on the 4 screws and tighten until the blind nuts gets stared at the firewall by the inner side

of the fuselage. Position the engine to the engine mount to obtain the throttle and choke pushrods passage

location, marking the 2 points to allow pushrods passage without obstructions or curves. Mark the throttle and

choke command location. Remove the engine. Loose the 4 10-32 x 1 ¼” engine mount fixing screws and remove

the engine mount. Drill 5mm holes on throttle and choke passage markings. Drill a 30 mm hole on the left

inferior part of the firewall (looking from the front) as show in the photo to the engine spark plug passage. Apply

30 to 40 minutes epoxy glue around the blind nuts through the inner part of the fuselage to strengthen the

plywood on fixing points to avoid the blind nuts to turn when tightening up the screws. Wait until full cure.

Above: 10-32 blind nuts stared to the firewall from the inner side (left) and firewall with the 10mm plywood

square part, holes for the engine mount screws, hole for passing the engine spark plug and holes for passage

of the engine throttle and choke controls (right).

Apply medium grade thread locker (removable) to the threads of the 10-32 x 1 ¼” screws and screw them

with the engine mount into the blind nuts through the 10mm square plywood part and the firewall, ensuring

that a solid, firm fixation with parallel alignment between the 4 screws.

Assemble all engine parts following the manufacturer's manual guidelines using a medium degree thread

lock (removable) on the bolts threads to ensure that they do not come loose with vibration and engine

operation. It is advisable to attach the throttle and choke control pushrods to the engine before definitively

attaching it to the engine mount. We recommend the use of DUBRO Laser Pushrods (DUB 500 or DUB 501) as

they are flexible, easy to install and non-metallic. Never use metal pushrods for throttle or choke commands of

gas burning engines due to the high risk of noise and resonance that can affect your radio control system. Sand

the ends of the outer tubes of the pushrods with coarse sandpaper (80 to 120 grit) to ensure better adhesion

and glue them to the firewall in the holes with epoxy glue for 5 minutes. Mount the links to the internals of the

pushrods ensuring they are secure and connect them to the engine throttle and choke control horns (ball links

can also be used on these controls for ease of connecting/disconnecting the throttle and choke). Important:

The plastic parts of the pushrods must stay inside the fire wall due to the heat of the engine. Connect the tygon

tubes to the engine's gasoline inlet. Pass the tygon tube and the 2 pushrods through the holes in the firewall.

To define the exact position of the engine on the upright, check the section “Installing the engine cowling” and

observe the distances:

Distance between firewall to prop washer: 167 mm (length)

Distance between the engine´s center shaft to the end of engine´s head: 93 mm (height)

T-27 Tucano 20cc 1.2 2022

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Above: installation of the DLE-20RA engine with Great Planes 60-120 adjustable engine mount (left) and

installation of the engine throttle and choke pushrods (right).

The engine ignition module must be installed immediately behind the firewall and the spark plug wire passed

through the firewall from the lower left side (viewed from the front) through the 30mm hole. It is recommended

to protect the ignition module with foam and secure it with double-sided tape or Velcro securely.

Very important: all fuel lines and engine cables must not, under any circumstances, have contact with parts

of the engine block that are very hot during and after operation. For this, we recommend fixing them to the

upright with nylon cable ties firmly and without the possibility of moving. Other engine mounts can be used,

since they are indicated for the engine used and are within the required mounting dimensions, such as anti-

vibration engine mounts to reduce the general vibration level of the engine reflected in the model aircraft, but

with a slight loss of power and maximum efficiency.

Above: installation of the ignition module behind the firewall on the side and flexible Dubro pushrods for

throttle and choke control (left) and engine positioned correctly on the correct alignment (right).

Above: DLE-20RA engine installation on aluminum anti-vibration engine mount.

T-27 Tucano 20cc 1.2 2022

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2 cycle glow engine installation:

Suggestion: OS 95 AX (left) and Slimline inverted pitts muffler (right).

Before installing your 2-stroke glow engine, please carefully read the manufacturer's manual and all parts

assembly recommendations including muffler, engine mount, installation, operation and maintenance. The

information contained in this manual is extremely important.

The firewall of the model aircraft is provided in the correct location, with the correct angles for the engine

installation and has markings for 4 engine mount holes. The larger hole on the firewall is used for fuel lines

and fuel tank ventilation passage and it is not centered, so the engine mount screws holes shall be aligned on

the 4 4mm markings on the firewall. It is provided a 10mm plywood square part to be used with 2-cycle glow

engines to position engine to the front, so the prop washer gets in correct alignment with the engine cowling.

This plywood part shall be glued to the firewall using 30 to 40 minutes epoxy glue, keeping the 4 engine mount

marking holes alignment. We recommend Great Planes 60 to 120 nylon adjustable mount (GPMG 1091) that

includes screws, washers and lock washers to hold the engine to the engine mount. To secure the engine mount

to the firewall and through the epoxy glued 10mm plywood part drill 4 5mm holes at indicated markings. Use 4

allen 10-32 x 1 ¼” screws (DUB 582), 4 10-32 blind nuts (DUB 584) and 4 washers on the screws.

Above: Great Planes adjustable engine mount with screws, washers and blind nuts (left) and original drilling

template provided with the engine mount (right).

T-27 Tucano 20cc 1.2 2022

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Place the engine mount in inverted position (upside down) with the 4 10-32 x 1 ¼” screws with washers inside

the holes through the square 10mm plywood part and the firewall until the inner side at the fuselage. Thread

the 10-32 blind nuts on the 4 screws and tighten until the blind nuts gets stared at the firewall by the inner side

of the fuselage. Position the engine to the engine mount to obtain the throttle pushrod passage location,

marking the point to allow pushrods passage without obstructions or curves. Mark the throttle command

location. Remove the engine. Loose the 4 10-32 x 1 ¼” engine mount fixing screws and remove the engine

mount. Drill 5mm hole on throttle passage marking. Apply 30 to 40 minutes epoxy glue around the blind nuts

through the inner part of the fuselage to strengthen the plywood on fixing points to avoid the blind nuts to turn

when tightening up the screws. Wait until full cure.

Above: 10-32 blind nuts stared to the firewall from the inner side (left) and firewall with screws and washers

securing the engine mount (right).

Screw the 4 10-32 x 1 ¼” screws with the engine mount into the blind nuts through the firewall, ensuring a

solid, firm fixation with parallel alignment between the 4 screws. It is advisable to attach the throttle control

pushrod to the engine before definitively secure it to the engine mount. We recommend DUBRO Laser Pushrods

(DUB 500 or DUB 501) as they are flexible and easy to install. If you prefer to use steel wire or another metallic

pushrod, there are no restrictions in the case of glow engines, as they do not have electronic ignition. Sand the

outer tube end of the pushrod with coarse sandpaper (80 to 120 grit) to ensure better adhesion and stick it to

the firewall in the hole with 5 minutes epoxy glue. Mount the link to the inside of the pushrod ensuring it is

secure and connect it to the engine throttle control horn. Important: The plastic parts of the pushrods must

stay inside the firewall due to the heat of the engine. Connect the silicone tube to the engine's fuel inlet. Pass

the silicone hose and pushrod through the holes in the firewall. To define the exact position of the engine on

the engine mount, check the section “Installing the engine cowling” and observe the measurements:

Distance between the firewall to the propeller washer: 167 mm (length)

Distance between the engine´s center shaft to the end of engine´s head: 81,3 mm (height) (OS 95AX)

The 2-stroke glow engines are designed with very bulky exhausts and positioned on the side of the engine,

which becomes a big nuisance when you think about the scale and realistic appearance of a model aircraft. We

recommend the use of an inverted pitts muffler, for installation at the rear of the engine with the exhaust pipes

positioned downwards, maintaining a good appearance of the aircraft nose and reducing the noise level emitted

by the engine operation. Be sure to purchase a model sized for the engine to be used.

T-27 Tucano 20cc 1.2 2022

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Above: OS 95AX with inverted pitts muffler installation.

4 cycle glow engine installation:

Suggestions: OS 120 SIII with fuel pump (left) and Saito 125A Golden Knight (right).

Before installing your 2-stroke glow engine, please carefully read the manufacturer's manual and all parts

assembly recommendations including muffler, engine mount, installation, operation and maintenance. The

information contained in this manual is extremely important.

The firewall of the model aircraft is provided in the correct location, with the correct angles for the engine

installation and has markings for 4 engine mount holes. The larger hole on the firewall is used for fuel lines

and fuel tank ventilation passage and it is not centered, so the engine mount screws holes shall be aligned on

the 4 4mm markings on the firewall. In the case of a 4-cycle glow engine it is not necessary to use the 10mm

plywood part provided with the kit.We recommend Great Planes 60 to 120 nylon adjustable mount (GPMG

1091) that includes screws, washers and lock washers to hold the engine to the engine mount. To secure the

engine mount to the firewall drill 4 5mm holes at indicated markings. Use 4 allen 10-32 x 1 ¼” screws (DUB 582),

4 10-32 blind nuts (DUB 584) and 4 washers on the screws.

T-27 Tucano 20cc 1.2 2022

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Above: Great Planes adjustable engine mount with screws, washers and blind nuts (left) and original drilling

template provided with the engine mount (right).

Place the engine mount in inverted position (upside down) with the 4 10-32 x 1 ¼” screws with washers inside

the holes in the firewall until the inner side at the fuselage. Thread the 10-32 blind nuts on the 4 screws and

tighten until the blind nuts gets stared at the firewall by the inner side of the fuselage. Position the engine to

the engine mount to obtain the throttle and choke pushrods passage location, marking the 2 points to allow

pushrods passage without obstructions or curves. Mark the throttle command location. Remove the engine.

Loose the 4 10-32 x 1 ¼” engine mount fixing screws and remove the engine mount. Drill 5mm holes on throttle

passage markings. Apply 30 to 40 minutes epoxy glue around the blind nuts through the inner part of the

fuselage to strengthen the plywood on fixing points to avoid the blind nuts to turn when tightening up the

screws. Wait until full cure.

Above: 10-32 blind nuts stared to the firewall from the inner side (left) and firewall with screws and washers

securing the engine mount (right).