Dynaflite PT-19 User Manual

TM

PT-19

• BUILDS QUICKLY

• REALISTIC FUN SCALE MODEL

• HUGE, 89" WINGSPAN (IMAA Legal)

READ THROUGH THIS INSTRUCTION MANUAL FIRST. IT CONTAINS
IMPORTANT INSTRUCTIONS AND WARNINGS CONCERNING THE ASSEMBLY
AND USE OF THIS MODEL

Dynaflite guarantees this kit to be free from defects in both material and workmanship at the date of
purchase. This warranty does not cover any component parts damaged by use or modification. In no
case shall Dynaflite's liability exceed the original cost of the purchased kit. Further, Dynaflite reserves
the right to change or modify this warranty without notice. In that Dynaflite has no control over the
final assembly or material used for final assembly, no liability shall be assumed nor accepted for any
damage resulting from the use by the user of the final user-assembled product. By the act of using
the user-assembled product, the user accepts all resulting liability. If the buyer is not prepared to
accept the liability associated with the use of this product, return this kit immediately in new and
unused condition to the place of purchase.

©Copyright 1997 PT19P03 Printed in USA

WARRANTY

Introduction

......................................................2

Precautions.......................................................3

Preparations.....................................................3

Required
Suggested Supplies
Optional

Accessories

.........................................3

Accessories

.......................................3

.......................................4

Building Notes.................................................4

Adhesives

.......................................................4

Common Abbreviations....................................5

Types

of

Wood

................................................5

Metric Conversion............................................5

Die Patterns ................................................6&7

Build

the Fuselage ...............................................8

Build

the Wing .....................................................12

Build theAilerons ...........................................................16

Build the Stabilizer & Elevators ...........................17

Build the Vertical
Mount

the

Wing

Fin & Rudder .........................19

to

the

Fuselage .........................20

FinalAssembly .................................................22

Finishing..........................................................26

Set The Control Throws...................................27

Balance

Preflight..................................................27

Your

Model.......................................27

At Home...............................................................27

At the Flying

Engine

Site

...........................................28

Safety

Precautions................................28

FLYING.............................................................28

Find a

Safe

Place

to

Fly..................................28

Takeoff..........................................................29

Flight.........................................................29

Landing
Terms & Definitions

........................................................29

........................................30

Cockpit & Wing Tip Patterns...........Center Spread

At Dynaflite we take pride in offering kits that are
simple and straight forward to build and provide
value for your modeling dollar. Because of the size
and cost of this model we assume you have built
several models and have a general working
knowledge of modeling and its terms. If you HAVE
NOT built and flown several kits, do yourself a favor
and get some experience before beginning this kit.

Your PT-19 is not a toy, but a sophisticated working
model that functions like a full-size airplane. Because
of its performance, if you do not assemble and
operate the PT-19 correctly, you could possibly injure
yourself or spectators and damage property.

To make your R/C modeling experience totally
enjoyable, we recommend that you get assistance
with assembly and your first flights from an
experienced, knowledgeable modeler. You'll learn

faster and avoid risk to your model before you're
truly ready to solo. Your local hobby shop has
information about flying clubs in your area whose
membership includes qualified instructors.

You can also contact the national Academy of Model
Aeronautics (AMA), which has more than 2,300
chartered clubs across the country. We recommend
you join the AMA which will provide you with
insurance coverage at AMA club sites and events.
AMA Membership is required at chartered club
fields where qualified flight instructors are available.
Contact the AMA at the address or toll-free phone
number below.

Congratulations on your choice of this kit for your
next project. The Fairchild PT-19 is a Fun Scale®
model of a true classic aircraft and has the presence

that only a big model can carry off.

Academy of Model Aeronautics

5151 East Memorial Drive

Muncie, IN 47302

[phone]

Fax [phone]

2

1. You must assemble the plane according to the
instructions. Do not alter or modify the model, as
doing so may result in an unsafe or unflyable model.
In a few cases the instructions may differ slightly
from the photos or plan. In those instances the

written instructions should be accepted as correct.

2. You must take time to build straight, true and strong.

These are the items "not included" with your kit, that
you

will

need to purchase separately.
parentheses (GPMQ3141) are suggested part
numbers recognized by distributors and hobby
shops and are listed for your ordering convenience.
GPM is the Great Planes® brand, TOP is the Top
Flite®

brand

and HCA

is

the

Hobbico®

Items

brand.

in

3. You must install all R/C and other components so
that the model operates properly on the ground and
in the air.

4. You must test the operation of the model before the
first and each successive flight to insure that all
equipment operates correctly. You must also make
certain that the model has remained structurally sound.

NOTE: We, as the kit manufacturer, can provide

you with a quality kit and great instructions, but

ultimately the quality and flyability of your finished
model depends on how you assemble it; therefore,

we cannot in any way guarantee the performance

of your completed model and no representations
are expressed or implied as to the performance or
safety of your completed model.

4 channel radio with 3 standard, 2 high torque
and one quarter scale servo.
Engine - 1.08 to 1.5 2-stroke or 1.2 to 1.6
4-stroke
Engine mount and mounting hardware

16oz.Fueltank(GPMQ4107)
Standard fuel tubing (GPMQ4131)
(2) 5" to 6" main wheels
(1) 1-1/2" tail wheel (GPMQ4243)
(4) 1/4" Wheel collars (DUBQ1200)
(2) 1/8" Wheel collars (GPMQ4304)

Top Flite® MonoKote® covering film (4 rolls)
or Coverite™ 21 st Century® Fabric

Paint for fuelproofing, the engine cowl and

the windshields
(1)OR(2) 1/3 Scale pilot(s)

1/4" Latex Foam Rubber (HCAQ1000)

These

are the adhesives
need to build your Pt-19. We recommend Great
Planes Pro™ CA and Epoxy

and

supplies

that

you

will

Please inventory and inspect all parts carefully
before starting to build! If any parts are missing,

broken or defective or if you have any questions
about building or flying this model, please call us at
[phone] and we'll be glad to help. If you are
calling for replacement parts, please look up the
part numbers and have them ready when calling.

4 oz. Thin CA Adhesive - (GPMR6004)
2 oz. Thick CA Adhesive - (GPMR6015)
CA Accelerator - (HCAR3750)
CA Applicator Tips - (HCAR3780)
6-Minute Epoxy - (GPMR6045)
30-Minute Epoxy - (GPMR6047)
4 oz. Aliphatic Resin Glue (GPMR6161)

3

A flat, durable, easy-to-handle sanding tool is a
necessity for building model airplanes. Great Planes
makes a complete range of Easy-Touch'" Bar Sanders
and replaceable Easy-Touch adhesive-backed
sandpaper. On our workbench, we have four 11"
Easy-Touch Bar Sanders, equipped with #50, #80,
#150 and #220-grit sandpaper. This setup is all that is
required for almost any sanding task. Custom sanding
blocks can be made from balsa for sanding hard-to­reach spots. We also keep some #320-grit wet-or-dry
sandpaper for finish sanding before covering.

For future reference, here's a list of Easy-Touch Bar
Sanders and adhesive-backed sandpaper:

5-1/2" Bar Sander (GPMR6169)

11 "Bar Sander (GPMR6170)

22" Bar Sander (GPMR6172)

12' Roll of adhesive-backed sandpaper,

80-grit (GPMR6180)

150-grit (GPMR6183)

220-grit (GPMR6185)

Assortment

pack of

5-1/2"

strips

(GPMR6189)

IMPORTANT: During construction you will be using a

number of balsa sticks to frame various assemblies.
Ample material is included but you should study the
plans, then make an effort to cut the longest pieces
you will need first. Label the pieces as you cut them
for later reference. By doing this now, you won't
have to splice pieces together later.

This kit is built with three types of glue.

Cyanoacrylate: CA glues cure almost instantaneously
and are moderately strong. There are different
viscosities of CA's intended for different conditions
you will encounter when you build. Thin CA is great
for "tack-gluing," for glue joints that fit well and for
parts that are already joined but need to be
permanently bonded. Medium CA is used for general
construction where you apply glue to one part, then
join it to another part. Thick CA is great for glue joints
that don't fit perfectly or parts that require a little time
for positioning before the glue cures. You will
encounter many other conditions that require one or

the other types of CA.

Robart Oleo landing gear struts (ROBQ1600)

Midwest scale instrument panel (MIDQ1105)

Always use CA in a well ventilated area. Open some
windows or place a fan in the room to circulate the
air. Do not lean directly over your work when you

use CA and look away while it cures or "sets off."

CA can cure immediately upon contact with skin so

if you accidentally bond your fingers, do not use

vigorous motion to separate them. Use CA Debonder
(GPMR6039) or acetone (nail polish remover) or
soak your fingers in warm water for a few minutes.

4

Never point the tip of a CA bottle toward your face

and be especially careful when you unclog a CA tip.

Hobbico CA Applicator Tips (HCAR3780) are highly

recommended and will help keep the bottle from
clogging. Keep paper towels or tissues close by to
immediately absorb excess CA dropped on your
model or work area. Read all the warning labels on
your CA bottle. CA Accelerator is a chemical that
you can spray over uncured CA to make it cure
immediately. A mist spray of accelerator will do the
job. Do not inhale the vapors! Some modelers
"preprime" the parts to be glued with accelerator,
join them, then add the CA. This way the CA is
guaranteed to cure immediately. This prepriming is
especially handy when you use thin CA because it
will cure before all of the glue soaks into the wood
away from the glue joint. We do not recommend
you build your entire model with this method and
use accelerator only when necessary. Often,
overspray from accelerator used hours or even days
earlier on nearby glue joints will cause the CA you
use on the next step to cure prematurely and
unexpectedly - so be careful!

Aliphatic Resin - Resin glues require that parts be
pinned or clamped together while the glue dries/­typically 15-30 minutes. Resin glues are very
strong and work well with balsa and plywoods.

Fuse = Fuselage

Ply = Plywood

" = Inches

Stab

= Horizontal Stabilizer

LE = Leading edge (front)

TE = Trailing edge (rear)

Balsa Basswood Plywood

Epoxy - Epoxy glues are the strongest but require the

most time to cure. Six-minute epoxy cures the fastest;
it sets within six minutes but is not fully cured for one
hour or more. Thirty-minute epoxy is the strongest as
it allows the epoxy to soak into the wood thoroughly.

While

it

sets

within

30

minutes,

cured for two or more hours.

it

will

not be fully

Inch Scale

Metric Scale

5

DIE PATTERNS

6

DIE PATTERNS

7

1. Place the fuselage drawing on your workbench
and cover it with wax paper from bulkhead D aft. Begin
construction by building the right rear side structure.

2. Using two 1 /4" x 15/16" x 42" balsa sticks,
cut and fit the rear side stringers. Cut the longest
pieces first. Pin and glue the parts into position.

3. Cut the diagonals from a 1/4" x 1/2" x 30"

balsa stick and glue into position.

6. Place the right fuselage side over the plans
and mark the locations of bulkheads B, C, D, E, F,
and G on the side. Place the left side over the right
and transfer the marks to the left side. Next, mark
each former at the center of the bottom edge. Place
the fuselage plan on your building board and draw
a line down the length of the plans along the
fuselage center with a long straightedge. These
marks and lines will be used to align the fuselage in

the following steps.

4. Fit the ply fuselage front to the fuse rear. Cut

doublers for the two joints from a 1 /8" x 1 /4" x 30"

balsa stick. When satisfied with the fit, glue them with

6-minute epoxy.

5. The left fuselage side is built over the right

side. Remove the right side from your building board

and turn it over. Use the leftover 1 /8" x 1 /4" stick to

shim the forward ply side. Cover the side with wax
paper. Follow steps 2, 3 and 4 to build the left side,

aligning the parts over the right side.

7. Glue bulkheads D and E to the right fuselage
side using 6-minute epoxy. Be sure the bulkheads
are at a 90 degree angle to the side. Epoxy will
produce the strongest joint but you can use thin CA
with accelerator if you are in a hurry.

8. Glue the left fuselage side to bulkheads D and E

using 6-minute epoxy. Align the side with the marks

8

you made earlier. Before the glue cures, sight across

the top of both sides to double check the alignment.

9. Slip bulkhead B over the outside of the

fuselage. Do NOT glue until the next step.

12. Glue bulkhead C to the fuselage sides with
6-minute epoxy. The bulkhead is slightly large so as
not to bind on the sides. Use leftover 1/8" x 1/4"
balsa sticks to reinforce the bulkhead/fuselage joint
as shown in the photo. The 1/8" x 1/4" stick above
the lower deck is glued to the front of the bulkhead.

The stick below the lower deck is glued to the aft side
of the bulkhead and INSIDE the fuselage.

13. Build bulkheads F and G over the fuselage

drawing using leftover 1/4" x 1/2" balsa sticks.

14. Pull the tail together and hold it in position

with clothespins. Do NOT glue until later.

10. Glue the top and bottom deck into position

with 30-minute epoxy. Also glue bulkhead B to the

fuselage sides and both decks with 30-minute epoxy.

Each deck spans from the firewall back to bulkhead
D. The rear of the lower deck is installed 9/16" up
from the bottom of bulkhead D. Use masking tape as
needed to hold the assembly together while the epoxy
cures. 30-minute epoxy is used to give enough time to
position the parts and also for strength.

11. Glue the doubler to bulkhead C using the

bottom curves to align the doubter.

Use this photo for the next four steps.

15. Lightly sand the sides of bulkheads F and G

to match the taper of the sides. Install them in the

sides and hold them in position with pins. Do NOT

glue until later.

16. Place the fuselage upright over the fuselage
drawing. Align the center mark on each bulkhead
with the line you drew down the plan earlier. You
will need to sight down from above the fuselage as it
will not rest flat on the drawing. Adjust the tail, as

9

needed, to get the center of each bulkhead to align
properly. When you are satisfied that everything is

aligned properly, glue the tail together. Also glue

bulkhead F and G to the fuselage

17. Glue the top ply part of bulkheads F and G

into position. Note that the top part of F goes in front
of the lower part of F. The rear of the top part of G
goes 1/2" in

18. Cut three 1 /4" x 1 /2" x 24" balsa sticks to a
length of 19". Glue these top rear stringers to
bulkheads E, F and G.

front

of the lower part of G.

sides.

21. Use leftover 1/4" x 1/2" balsa sticks to

frame between the bottom stringers at bulkhead E.
Just tack glue them into position at this time
may need to adjust them when the wing is fitted.

as you

19. Notch the bottom stringers to accept the die­cut 1/8" ply tailwheel plate. The correct position for
the bracket will allow the 1/4" x 1/2" stringers,
added in the next step, to extend 1 /4" below the
bottom of the 1/4" x 15/16" side stringers. When
satisfied with the fit glue the die-cut plate into

position with 6-minute epoxy.

20. Cut two 1/4" x 1/2" x 30" balsa sticks to a

length of 28-1/2". Fit and glue these bottom
stringers into position. You will need to notch them at
bulkheads F and G. They should extend 1 /4" below
the 1/4" x 15/16" side stringers. You can let them
extend into the area where the tailwheel plate is
mounted if desired.

22. Glue the 1 /4" ply wing hold down plate
place with 6-minute epoxy. Use some leftover
1/4" x 3/8" basswood sticks to reinforce above the

ply plate.

23. Roll the fuselage over and glue Bulkheads
B-1 and D-1 into place. Bulkhead B-1 is glued
3-1/16" behind Bulkhead B and bulkhead D-1

glued 2" behind bulkhead D.

24. Cut and glue the stringers between bulkheads
B and B-1 and between bulkheads D and D-1.
leftover

10

1/4" x 1/2" balsa sticks.

into

is

Use