E-flite PT-19 450 ARF User Manual
PT-19 ARF
Assembly Manual
Specifications
Wingspan: 45 in (1440mm)
Length: 36 in (910mm)
Wing Area: 310 sq in (19.9 sq dm)
Weight w/o Battery: 22–24 oz (680–740 g)
Weight w/Battery: 27–29 oz (820–880 g)
Pilots not included (available separately)
Table of Contents
Introduction
Using the Manual
Introduction ............................................................... 2
Important Information Regarding
Warranty Information ............................................ 2
Using the Manual ....................................................... 2
Contents of Kit/Parts Layout ........................................ 2
Covering Colors ......................................................... 2
Recommended Radio Equipment,
Radio Controlled Version ....................................... 3
Recommended Equipment, Control Line Version ........... 3
Optional Accessories .................................................. 3
Brushless Outrunner Setup .......................................... 3
Required Tools and Adhesives ..................................... 3
Note on Lithium Polymer Batteries ............................... 3
Warning .................................................................... 4
Construction Options .................................................. 4
Fixed Aileron Linkage Installation CL Option ................ 4
Aileron Servo and Linkage Installation RC Option ........ 6
Joining the Wing Panels, RC and CL Options ............. 10
Landing Gear Installation RC/CL options ................... 13
Stabilizer and Fin Installation RC/CL Options ............. 14
Rudder Servo Installation CL Option .......................... 16
Rudder Servo Installation RC Option .......................... 18
Elevator Bellcrank Installation CL Option .................... 20
Elevator Servo Installation RC Option ........................ 22
Receiver Installation RC Option ................................. 24
Speed Control Installation, RC/CL Options ................. 25
Motor Installation RC/CL Options .............................. 26
Cowling and Propeller Installation,
RC/CL Options ................................................... 27
Motor Battery Placement RC/CL Options ................... 30
Wing Installation, RC/CL Options ............................. 31
Leadout Guide Installation and Tip
Weight Box CL Option ........................................ 31
Pilot Installation (Optional) RC/CL Options ................ 33
Control Throws......................................................... 33
Center of Gravity ..................................................... 34
Preflight ................................................................... 34
Range Test Your Radio .............................................. 35
Control Line Flying Checklist ..................................... 35
Safety, Precautions and Warnings ............................. 38
Safety Do’s and Don’ts for Pilots ................................ 38
Warranty Information ............................................... 39
Instructions for Disposal of WEEE by
Users in the European Union ............................... 40
2008 Official Academy of Model
Aeronautics Safety Code ..................................... 40
Building and Flying Notes ................................... 42–43
During WWII, the PT-19 Cornell was one of the
primary training aircraft for the Army Air Corps. The
PT-19 had a higher wing loading and higher stall
speed that helped pilots in training learn more than the
current biplane trainers.
E-flite’s version of the PT-19 is a scale, almost-readyto-fly, electric model designed for radio control with
the option of control line. It’s 90% pre-built out of the
box and boasts an appealing USAAC trim scheme for
a great scale appearance. Those modelers who enjoy
radio controlled flying can complete this ARF with the
recommended E-flite
®
Park 450 or high-powered Park
480 motor. The PT-19 features an easily accessible
magnetic battery hatch and steerable tail wheel for
improved ground handling.
The PT-19 can also be flown as a control line plane.
All of the internal control line completion hardware is
included, while the ESC timer, wooden control handle
and spool of wire cable is available separately.
Control line flying will allow the airplane to be flown
by two cables that connect the model to the operator
through the optional control line handle and allow the
operator’s hand movement to guide the model.
Either way you choose, the flying options are yours
with the E-flite PT-19.
Important Information
Regarding Warranty Information
Please read our Warranty and Liability Limitations
section on Page 39 before building this product. If you
as the Purchaser or user are not prepared to accept the
liability associated with the use of this Product, you are
advised to return this Product immediately in new and
unused condition to the place of purchase.
This manual is divided into sections to help make
assembly easier to understand, and to provide breaks
between each major section. In addition, check boxes
have been placed next to each step to keep track
of its completion. Steps with a single circle () are
performed once, while steps with two circles ( )
indicate that the step will require repeating, such as for
a right or left wing panel, two servos, etc.
Remember to take your time and follow the directions.
Contents of Kit/Parts Layout
Replacement Parts
EFL2676 Wing Set
EFL2677 Fuselage Set
EFL2678 Tail Set
EFL2679 Cowling
EFL2680 Landing Gear
EFL2681 Pushrod Set
EFL2682 Fuselage Hacth
EFL2683 Windscreens
EFL2684 C/L Bellcrank Assembly
EFL2685 Hardware Package
EFLA219 Tailwheel Assembly
Covering Colors
HANU872 Bright Yellow
HANU885 Midnight Blue
2 E-flite PT-19 ARF Assembly Manual
Recommended Radio Equipment,
Radio Controlled Version
You will need a minimum of a 4-channel transmitter,
receiver and four servos. You can choose to purchase
a complete radio system. If you are using an
existing transmitter, just purchase the other required
equipment separately. We recommend the crystalfree, interference-free Spektrum™ DX5e 2.4GHz DSM®
5-channel system. If using your own transmitter, we
recommend the E-flite S75 Sub-Micro servos.
If you own a Spektrum radio, just add a DSM2™
receiver and four E-flite S75 Sub-Micro servos. We
show the installation of the AR6100 receiver in the
manual.
Radio System
SPM5500 DX5e DSM2 5CH system
Or Purchase Separately
any of the Following Receivers
SPMAR500 AR500 DSM2 5-Channel Full-
Range Receiver (for DX5e, DX6i
or DX7)
SPMAR6100 AR6100 DSM2 6-Channel Park
Flyer Receiver (for DX5e, DX6i,
or DX7)
SPMAR6100E AR6100E DSM2 6-Channel Park
Flyer Receiver (for DX5e, DX6i,
or DX7)
SPMAR6200 AR6200 DSM2 6-Channel Full
Range Receiver (for DX5e, DX6i,
or DX7)
And
EFLRS75 7.5-gram Sub-Micro
Servo (4)
EFLREX6L 6-inch Extension, Lightweight (2)
EFLRYH3 3-inch Y-harness, Lightweight
Recommended Equipment,
Control Line Version
EFLA170 Control Line Handle
EFLA171 52’ Braided Steel Lines
EFLA172 Control Line Motor Timer
SIGSH561 Sig Mfg Lead Balancing
Weight (1/4 ounce)
Optional Accessories
EFLA110 Power Meter
EFLC3005 Celectra™ 1- to 3-Cell
Li-Po Charger
EFLC505 Intelligent 1- to 5-Cell
Balancing Charger
EFLA150 Military Pilot (1 or 2)
Brushless Outrunner Setup
EFLM1400 Park 450 Brushless Outrunner
Motor, 890Kv
APC10070E 10x7 Electric Propeller
EFLP1080E 10X8 Electric Propeller
EFLA1030 30-Amp Pro Switch-Mode
BEC Brushless ESC
or
EFLM1505 Park 480 Brushless Outrunner
Motor, 1020Kv
APC12060E 12x6 Electric Propeller
EFLA1040L 40-Amp Lite Pro Switch-Mode
BEC Brushless
and
EFLA172 Motor Timer (control line only)
EFLB21003S 2100mAh 3S 11.1V 20C Li-Po,
13AWG EC3
Required Tools and Adhesives
Tools & Equipment
Card stock Epoxy brushes
Low-tack tape Medium grit sandpaper
Mixing cups Mixing sticks
Paper towels Pencil
Pin drill Pliers
Rubbing alcohol Ruler
Scissors Square
String/dental floss T-pins
Trim seal tool Phillips screwdriver: #0, #1
Felt-tipped pen Rubber bands (optional)
Heat gun Sealing iron
Hobby knife (#11 blade)
Nut driver: 1/4-inch, 5.5mm
Hex wrench or ball driver: 1.5mm, 3/32-inch
Drill bit: 1/16-inch (1.5mm), 1/8-inch (3mm)
Adhesives
Threadlock 30-Minute Epoxy (HAN8002)
Thin CA 6-Minute Epoxy (HAN8000)
Note on Lithium Polymer Batteries
Lithium Polymer batteries are significantly
more volatile than alkaline or Ni-Cd/
Ni-MH batteries used in RC applications.
All manufacturer’s instructions and warnings
must be followed closely. Mishandling of
Li-Po batteries can result in fire. Always
follow the manufacturer’s instructions when
disposing of Lithium Polymer batteries.
The Spektrum trademark is used with permission
of Bachmann Industries, Inc.
3E-flite PT-19 ARF Assembly Manual
Warning
An RC aircraft is not a toy! If misused, it can cause
serious bodily harm and damage to property. Fly
only in open areas, preferably at AMA (Academy of
Model Aeronautics) approved flying sites, following all
instructions included with your radio.
Keep loose items that can get entangled in the
propeller away from the prop, including loose clothing,
or other objects such as pencils and screwdrivers.
Especially keep your hands away from the propeller.
During the course of building your PT-19 ARF we
suggest that you use a soft base for the building
surface. Such things as a foam stand, large piece of
bedding foam or a thick bath towel will work well and
help protect the model from damage during assembly.
Construction Options
Fixed Aileron Linkage Installation
CL Option
Required Parts
Wing panel (left and right)
Aileron pushrod wire, 2 1/2-inch (65mm) (2)
Control line servo cover (left and right)
Brass pushrod connector (2)
Pushrod connector backplate (2)
2mm x 4mm machine screw (2)
2mm x 8mm sheet metal screw (8)
Required Tools and Adhesives
Phillips screwdriver: #1 Pliers
Low-tack tape
This section details the installation of the aileron
linkage for the control line version of the
PT-19. If you are building the radio controlled
version, please skip to the next section.
2. Insert the end of the 2 1/2-inch (65mm) aileron
linkage in the outside hole of the aileron control horn.
Your PT-19 can be built a variety of ways. The two
different options are either Radio Control (RC) or
Control Line (CL). The RC version has the ability to
be transformed from RC to CL and back to RC again
with only a few minutes of work. For those who would
like to built the model soley as a CL model, you will
find a section dedicated to this in the beginning of
construction when installing the aileron linkages. You
will find in bold print at each section, what version it
is for. Either RC or CL will determine what the step is
for. Please note that there is a section at the end of the
manual as to what is required to lock the ailerons in
place for CL flying if you have built the RC version.
1. Remove the aileron servo cover from the wing
and set it aside. You will be using a different cover,
but you may want to save this cover for use later if
you convert your aircraft to radio control.
4 E-flite PT-19 ARF Assembly Manual
3. Remove the string from the bottom of the wing
and tape it inside the wing. You may want to
convert you PT-19 to radio control at some time,
and the string will be helpful in pulling the servo
extension from the aileron servo through the wing
when you do.
4. Locate the aileron cover for the control line
version of your model. Insert the brass pushrod
connector into the outside hole of the control line
aileron servo cover. Use a pushrod connector
backplate and pliers to secure the connector.
6. Slide the aileron pushrod through the hole in the
brass pushrod connector.
5. Use a #1 Phillips screwdriver and four 2mm x
8mm sheet metal screws to secure the aileron servo
cover to the wing.
7. Use a small piece of low-tack tape to hold the
aileron centered for the next step.
5E-flite PT-19 ARF Assembly Manual
8. Use a #1 Phillips screwdriver and a 2mm x 4mm
machine screw to secure the aileron pushrod wire.
Remove the low-tack tape from the aileron at this
time as well.
9. Repeat steps 1 through 8 to install the remaining
cover and aileron linkage.
Aileron Servo and Linkage Installation
RC Option
Required Parts
Radio system Wing panel (left and right)
Servo (2)
Connector backplate (2)
Brass pushrod connector (2)
2mm x 4mm machine screw (2)
2mm x 8mm sheet metal screw (8)
6-inch (152mm) servo extension (2)
Aileron pushrod wire, 2 1/2-inch (65mm) (2)
Required Tools and Adhesives
Pin drill Drill bit: 1/16-inch (1.5mm)
Pencil Phillips screwdriver: #0, #1
6-minute epoxy Medium grit sandpaper
Mixing cup Mixing stick
Thin CA String/dental floss
Pliers Low-tack tape
This section details the installation of the aileron
linkage for the radio controlled version of the
PT-19. If you are building the control line version
and have already installed the aileron linkage,
please skip this section of the manual.
2. Use a pin drill and 1/16-inch (1.5mm) drill bit
to enlarge the center outer hole of the servo arm
as shown.
3. Insert the brass pushrod connector into the hole.
Use pliers and the connector backplate to secure
the brass pushrod connector to the servo arm.
1. Use the radio system to center the aileron servos.
Use a #0 Phillips screwdriver to remove the control
horns and install them on the servos as shown.
Prepare a left and right aileron servo at this time.
6 E-flite PT-19 ARF Assembly Manual
5. Position the servo on the servo cover. Center the
servo arm in the cutout in the servo cover
as shown.
7. Once the servo is properly positioned, use a
pencil to trace the servo tabs and servo edges on
the servo cover.
4. Carefully remove the servo cover from the
wing panel.
6. The servo arm will also be flush with the edge of the
servo cover as shown when it is positioned properly.
8. Check to make sure the servo mounting block
does not overhang the edge of the servo cover. If
so, you will need to adjust the position of the servo
to make sure both blocks will be on the servo cover.
7E-flite PT-19 ARF Assembly Manual
9. Use a piece of medium grit sandpaper to
roughen the ends of the servo mounting blocks.
This will help the epoxy to adhere to the blocks
and provide a more secure bond between the
blocks and servo cover.
10. Mix a small amount of 6-minute epoxy. Use the
epoxy to glue the blocks to the servo cover. Use the
lines drawn on the servo cover to properly position
the block.
12. Once the epoxy has fully cured, position the
servo between the servo mounting blocks.
13. Use a pencil to mark the positions for the servo
mounting screws onto the mounting blocks.
14. Use a pin drill and 1/16-inch (1.5mm) drill
bit to drill a hole in each mounting block at the
position marked in the previous step.
15. Place 2–3 drops of thin CA into each of the
holes to harden the surrounding wood. This will
provide a harder surface for the screws to bite into
and make them more secure when installed.
11. Repeat the steps 2 through 10 to glue the
blocks on the remaining servo cover at this time.
Allow the epoxy to fully cure before proceeding.
8 E-flite PT-19 ARF Assembly Manual
16. Mount the servo to the blocks using the two
screws provided with the servo. Use a #1 Phillips
screwdriver to tighten the screws.
17. Connect a 6-inch (152mm) servo extension to
the lead from the aileron servo.
18. Use string or dental floss to secure the
extension to the servo lead so they do not
become unplugged inside the wing.
19. Remove the tape from the string near
the aileron servo opening in the wing. Tie the
string to the end of the aileron servo extension.
Use the string to pull the extension through the
wing and out of the hole near the center of the
wing as shown.
If using string or dental floss to secure your servo
lead, we place a very small drop of thin CA onto
the knot to ensure it does not untie over time.
9E-flite PT-19 ARF Assembly Manual
20. Use a #1 Phillips screwdriver to install the four
2mm x 8mm sheet metal screws that secure the
aileron servo cover to the wing.
21. Insert the Z-bend end of the 2 1/2-inch (65mm)
aileron linkage in the outside hole of the aileron
control horn.
22 Insert the aileron pushrod in the hole of the
brass connector pushrod. Once the pushrod is
inserted into the connector, center the aileron using
low tack tape.
23. Make sure the aileron servo is centered from
Step 1. Use a #1 Phillips screwdriver and 2mm x
4mm machine screw to secure the aileron pushrod
in the brass pushrod connector. Once connected,
remove the low tack tape from the aileron.
Joining the Wing Panels,
RC and CL Options
Required Parts
Wing panel (right and left) Wing joiner
4-40 x 1-inch socket head screw (2) (optional)
Required Tools and Adhesives
30-minute epoxy Paper towel
Mixing cup Mixing sticks
Epoxy brush Rubbing alcohol
T-pin Low-tack tape
Square Pencil
Sandpaper: medium grit
Rubber bands (optional)
1. Use a pencil to mark the wing panel and wing
joiner. This is necessary as you will need to be able
to return the joiner back to the panels in which it
was fitted.
24. Repeat steps 12 through 23 to mount the
remaining aileron servo to the servo cover and
install the aileron linkage.
10 E-flite PT-19 ARF Assembly Manual
2. Place the joiner on the work surface. With the
square aligned with the high point of the joiner, use
a pencil to make the centerline on the joiner.
3. Slide the joiner into the appropriate wing panel
up to the line drawn in the previous step. If the
joiner does not slide in easily, it may be necessary
to lightly sand the joiner to correct the fit. Repeat
the process to fit the joiner into both wing panels.
4. Place a T-pin lightly in the center of the joiner.
This will allow the joiner to fit centered in each
wing panel when installed.
5. Mix 1/2 ounce (15ml) of 30-minute epoxy and
using an epoxy brush apply the epoxy to the root
of one wing panel.
7. Apply epoxy to the end of the wing joiner that
will be inserted into the wing panel. Make sure to
cover the front, back, top and bottom of the joiner.
8. Slide the joiner into the wing panel. Work slowly
so the epoxy can be cleaned using a paper towel
and rubbing alcohol as the joiner is inserted into
the panel. Once the joiner is inserted, apply epoxy
to all edges of the exposed joiner.
6. Use a mixing stick to apply the epoxy into the
joiner pocket of the wing panel.
Excess epoxy will ooze out of the joiner pocket as
the joiner is inserted. If it does not, you have not
used enough epoxy. Repeat steps 6 and 7 to apply
more epoxy to the joiner and into the joiner pocket.
11E-flite PT-19 ARF Assembly Manual
9. Apply epoxy in the joiner pocket and root of the
remaining wing panel.
10. Slide the wing panels tightly together. Remove
the T-pin from the joiner that was installed in Step
4. Slide the wing panels tightly together. Again,
work slowly to clean up any excess epoxy using a
paper towel and rubbing alcohol.
11. Use low-tack tape to hold the two wing panels
together until the epoxy fully cures. Clean any
excess epoxy from the wing panels using rubbing
alcohol and a paper towel.
You can use the two 4-40 x 1-inch socket head
wing bolts and three rubber bands to hold the wings
together while the epoxy cures. Simply insert the wing
bolts half-way into the holes at the trailing edge and
wrap a rubber band around the bolts on both the
top and bottom of the wing. Use a third rubber band
around the wing dowels. Always clean up any excess
epoxy using a paper towel and rubbing alcohol.
12 E-flite PT-19 ARF Assembly Manual
Landing Gear Installation
RC/CL options
Required Parts
Assembled wing
Main landing gear assembly (2)
Landing gear strap (4)
2mm x 8mm sheet metal screw (8)
Required Tools and Adhesives
Phillips screwdriver: #1 Hex wrench: 1.5mm
Hobby knife with #11 blade
A 1.5mm allen wrench has been supplied for you in
case you need to remove the wheels at any given time.
1. Locate one of the pre-assembled main landing
gear. There is not a right and left, so either one will
work. Insert the landing gear into the pre-drilled
hole in the landing gear block on the bottom of the
wing. Press the gear into the block so it is flush with
the bottom of the wing.
You might find that sometimes the landing gear wire
may not fully seat in the landing gear block. This is
because of the radius on the bend of the wire. Use
a small round file or #11 blade to remove a slight
amount of material from the landing gear block
allowing the wire gear to fully seat in the block.
13E-flite PT-19 ARF Assembly Manual
2. Use two landing gear straps and four 2mm
x 8mm sheet metal screws to secure the landing
gear to the bottom of the wing. Use a #1 Phillips
screwdriver to tighten the four screws.
3. Repeat Steps 1 and 2 to install the remaining
main landing gear to the bottom of the wing.
Stabilizer and Fin Installation
RC/CL Options
Required Parts
Stabilizer assembly Vertical fin assembly
#4 washer (4) 4-40 locknut (2)
Fuselage
4-40 x 1/2-inch socket head screw (2)
Rudder pushrod wire, 18 3/8-inch (467mm)
Elevator pushrod wire, 20 1/2-inch (521mm)
Required Tools and Adhesives
Threadlock Nut driver: 1/4-inch
Ball driver or hex wrench: 3/32-inch
1. Locate the horizontal stabilizer and determine
the top and bottom as shown in the photos below.
The top will have the blind nuts, and the control
horn will face to the bottom.
2. Locate the vertical fin assembly. Slide the
threaded rods from the fin through the holes in the
stabilizer. The blind nuts in the stabilizer will fit into
the recesses in the vertical fin fairing.
14 E-flite PT-19 ARF Assembly Manual
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