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WATT AGE PT-19 CORNELL EP ARF Instructions For Final Assembly

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The most innovative and effective primary trainer of its era, the PT-19 saw service starting in 1939 with the military's first order of 270 pieces.
With its unique advanced design and 6 cylinder engine, it out-flew over 17 other designs to win its first military contract. Over its service life, this
special design saw over 3 official different variations (PT-19, PT-23, and PT-26) and in that time, well over 8000 were produced and used to train
Allied pilots world-wide. More WWII pilots trained in this aircraft than in any other, making it still today one of the most recognized and revered
designs from this golden era of aviation.
Today, we're reverent to the history of this beautiful aircraft and are proud to present the WattAge PT-19 Cornell EP ARF. In its spirit of utility and
innovation, this beautiful Park Scale (tm) model features an innovative advanced-molded plastic fuselage that offers light weight and superb
detailing. The wing and tail are built-up wood frames covered in a strong, but light iron-on covering that is repairable and re-shrinkable (we even
include a piece in case a minor repair is needed).
Modern electric R/C pilots demand light weight and this scale aircraft is a winner with its 12 ounce per square foot wing loading. And yet, with so
much beauty and a detailed design, we managed to put huge value into this very affordable plane. It even includes complete lightweight micro
hardware and a detailed instruction manual.
INSTRUCTIONS FOR FINAL ASSEMBLY
The WattAge PT-19 Cornell EP ARF is distributed
exclusively in North America by Global Hobby Distributors
18480 Bandilier Circle, Fountain Valley, CA 92708
All contents copyright © 2005, Global Hobby Distributors
Version V1.0 February 2005
IMPORTANT
The WattAge PT-19 Cornell EP ARF is not intended for inexperienced pilots. It is in no way a trainer. If you are
not comfortable flying low wing sport aircraft, we strongly suggest returning the airplane (brand new, in the box with all original
packaging and your dated sales receipt) to the place of purchase.
PT-19 CORNELL EP ARF SPECIFICATIONS:
Wing Span: 32 Inches (812mm)
Wing Area: 164 Square Inches (10.58dm
Length: 24.5 Inches (622mm)
Weight RTF: 14 - 15 Ounces (396 - 425gr)
Wing Loading: 12.3 - 13.2 Ounces Per Square Foot (37.4 -40gr/dm
Functions: Ailerons, Elevator, Rudder and Throttle
Motor Required: 370 w/3.67:1 Gear Box & 7.5 x 5 Propeller
Radio Required: 4Ch or More Micro w/3 Micro Servos
ESC Required: 15 Amp Micro
Battery Required: 2 Cell 1000mAH - 1500mAH LiPO or
8 Cell 5/4AAA 800mAH NiMH
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2
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Kit Product Number 128387

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Summary of Contents for WATT AGE PT-19 CORNELL EP ARF

  • Page 1 Today, we're reverent to the history of this beautiful aircraft and are proud to present the WattAge PT-19 Cornell EP ARF. In its spirit of utility and innovation, this beautiful Park Scale (tm) model features an innovative advanced-molded plastic fuselage that offers light weight and superb detailing.

  • Page 2: Table Of Contents

    Section 3: Tools and Supplies Required ..........6 Section 14: Final Assembly ..............26 Section 4: A Note About Covering ............6 Section 15: Balancing the PT-19 Cornell EP ARF ......28 Section 5: Kit Contents ................ 7 Section 16: Control Throws ..............29 Section 6: Replacement Parts .............

  • Page 3: Introduction

    INTRODUCTION Thank you for purchasing the WattAge PT-19 Cornell EP ARF. Before completing the final assembly of your new air- plane, please carefully read through this instruction manual in its entirety. Doing so will ensure your success the first time...

  • Page 4: Section 1: Our Recommendations

    This section describes our recommendations to help you in deciding which types of accessories to purchase for your new WattAge PT-19 Cornell EP ARF. Please read through this entire section very carefully. We have provided you with tips and recommendations that, if followed, will result in a great flying airplane. Failure to follow our recommendations may result in a poor flying airplane.

  • Page 5: Section 2: Lithium Polymer Battery Warnings

    SECTION 2: LITHIUM POLYMER BATTERY WARNINGS - PLEASE READ If you will be using a Lithium Polymer (LiPO) flight battery with your PT-19 Cornell EP ARF, please read and understand the warnings listed in this section. Also make sure to read any and all warnings included in the packaging with your battery.

  • Page 6: Section 3: Tools And Supplies Required

    SECTION 3: TOOLS AND SUPPLIES REQUIRED The tools and supplies listed below will be necessary to finish the assembly of your new WattAge PT-19 Cornell EP ARF. We suggest having these items on hand before beginning assembly. Kwik Bond 5 Minute Epoxy # 887560...

  • Page 7: Section 5: Kit Contents

    SECTION 6: REPLACEMENT PARTS We stock a complete line of replacement parts for your WattAge PT-19 Cornell EP ARF. Listed below are the replacement parts that are available along with their respective part numbers for easy ordering convenience. We suggest ordering directly from your local dealer.

  • Page 8: Section 7: Wing Assembly

    SECTION 7: WING ASSEMBLY YOU'LL NEED THE FOLLOWING PARTS FROM THE KIT: (1) Right Wing Panel w/Aileron (1) Composite-Reinforced Wing Joiner (1) Left Wing Panel w/Aileron YOU'LL NEED THE FOLLOWING TOOLS AND SUPPLIES: Kwik Bond 5 Minute Epoxy Masking Tape Excel Modeling Knife Paper Towels Ruler...
  • Page 9 Carefully slide both wing panels together with the wing joiner temporarily installed (without using glue). While holding the two wing panels together firmly, make sure that both wing panels are lined up at both the leading and trailing edges, then look carefully at the center-section joint: the wing panels should fit together tightly with few or no gaps in the joint.

  • Page 10: Section 8: Stabilizer Installation

    SECTION 8: STABILIZER INSTALLATION YOU'LL NEED THE FOLLOWING PARTS FROM THE KIT: (1) Prebent Elevator Joiner Wire (1) Fuselage (1) M3 x 20mm Flange-Head Self-Tapping Screw (1) Horizontal Stabilizer w/Elevator Halves (1) Vertical Stabilizer w/Rudder YOU'LL NEED THE FOLLOWING TOOLS AND SUPPLIES: Kwik Bond Thin C/A Builder's Triangle Kwik Bond 5 Minute Epoxy...
  • Page 11 Using a ruler, builder's triangle and a pencil, carefully measure and draw a vertical centerline across the top of the horizontal stabilizer. Slide the stabilizer into the mounting slot and temporarily align it. The stabilizer should be pushed forward completely, and when viewed from above through the vertical stabilizer mounting slot, the centerline you drew on the stabilizer should be centered within the vertical stabilizer mounting slot.
  • Page 12 Use a couple of pieces of masking tape to hold the front of the stabilizer in place and aligned. With the stabilizer held firmly in place, look from the front of the airplane at both the wing and the stabilizer. When aligned properly, the stabilizer should be parallel to the wing.
  • Page 13 To make it less messy during installation, apply masking tape to the fuselage around the side of the mounting slot that the stabilizer will slide into. Apply masking tape to the top and bottom of the corresponding side of the stabilizer, too. Partially slide the stabilizer into the mounting slot.

  • Page 14: Section 9: Hinging The Control Surfaces

    Important Information About the C/A Style Hinges Included with Your PT-19 Cornell EP ARF The PT-19 Cornell EP ARF uses C/A style hinges to hinge the control surfaces. These hinges are designed to be glued into place, using thin C/A. Do not glue these hinges into place using any other type of glue, such as thick C/A or epoxy. Use of any adhesive other than thin C/A could result in failure of the hinges during flight.
  • Page 15 Push the aileron and its hinges into the hinge slots in the trailing edge of the wing, making sure that the torque rod wire is firmly seated within the precut slot in the aileron. The aileron should be pushed firmly up against the trailing edge, so that there is a minimal hinge gap (no more than 1/32" wide), and the ends of the aileron should not rub against the edges of the wing.
  • Page 16 Push the elevator half and its hinges into the hinge slots in the trailing edge of the stabilizer, making sure that the elevator joiner wire is firmly seated within the precut slot in the elevator half. The elevator half should be pushed firmly up against the trailing edge, so that there is a minimal hinge gap (no more than 1/32"), and the end of the elevator half should be even with the end of the stabilizer.

  • Page 17: Section 10: Motor And Cowling Installation

    When satisfied with the fit and alignment, remove the tail wheel wire and use 220 grit sandpaper to roughen only the gluing surfaces of the tail wheel wire. Glue the tail wheel wire into place, using a generous amount of 5 minute epoxy. Remove any excess epoxy, using a paper towel and rubbing alcohol, and allow the epoxy to set up before proceeding.
  • Page 18 Secure your motor assembly to the firewall, using three M3 x 12mm wood screws. IMPORTANT If you're using a different motor assembly than recommended, you'll need to take the time to make sure to mount it so that the propeller shaft will line up properly with the cowling. STEP 2: INSTALLING THE COWLING IMPORTANT No matter which brand and type of power system you've chosen to use, the cowling installation procedures...

  • Page 19: Section 11: Elevator And Rudder Control Systems Installation

    Secure the cowling to the fuselage, using three M2 x 8mm wood screws, then install your propeller to finish off the installation. Make sure that the back of the propeller doesn't rub against the front of the cowling. SECTION 11: ELEVATOR AND RUDDER CONTROL SYSTEMS INSTALLATION YOU'LL NEED THE FOLLOWING PARTS FROM THE KIT: (1) 9-1/2"...
  • Page 20 Position a nylon control horn onto the bottom, left side of the elevator. When aligned properly, the centerline of the control horn should be 1/2" out from the inside edge of the elevator (at the hinge line) and the clevis attachment holes should be lined up over the hinge line.
  • Page 21 Remove the pushrod assembly from the fuselage and make a Z-Bend in the pushrod wire at the mark you drew. Attach the servo horn to the Z-Bend, then reinstall the pushrod assembly, making sure that the servo arm is centered. Double-check that the elevator is centered, then reinstall the clevis and install and tighten the servo horn retaining screw, provided with your servo, to secure the servo horn into place.

  • Page 22: Section 12: Aileron Control System Installation

    Use a piece of masking tape, taped between the rudder and the stabilizer, to hold the rudder centered. Plug the rudder servo into your receiver, then plug your ESC into the receiver and your flight battery into the ESC . Turn on your radio system and center the servo, using the rudder trim lever on your transmitter.
  • Page 23 Using a modeling knife, cut away and remove the covering material from within the outline you drew. Glue the aileron servo tray into place, using a generous amount of 5 minute epoxy. Remove any excess epoxy, using a paper towel and rubbing alcohol, and allow the epoxy to set up before proceeding. Install the rubber grommets and brass collets onto your aileron servo, making sure to install the collets with the flanges toward the bottom of the servo.

  • Page 24: Section 13: Landing Gear Installation

    IMPORTANT The wheels included with the PT-19 Cornell EP ARF are suitable for use on hard surfaces, such as concrete, asphalt and hard-packed dirt. If you will be flying off of grass, we suggest replacing the stock wheels with larger wheels. The larger diameter wheels will make it easier to land and take off on grass runways.
  • Page 25 Working with one landing gear wire for now, secure the landing gear wire to the wing, using one nylon landing gear strap and two M2 x 8mm wood screws. Position the nylon landing gear strap approximately 3/8" in from the outside edge of the landing gear wire, and make sure that the middle of the landing gear strap is centered over the landing gear wire.

  • Page 26: Section 14: Final Assembly

    SECTION 14: FINAL ASSEMBLY YOU'LL NEED THE FOLLOWING PARTS FROM THE KIT: (2) Clear Windscreens (1) Decal Set (1) Black Striping Tape (1) Plastic Leading Edge Fairing (1) Double-Sided Foam Tape YOU'LL NEED THE FOLLOWING TOOLS AND SUPPLIES: Pacer Formula 560 Canopy Glue 220 Grit Sandpaper w/Sanding Block Masking Tape # 1 Phillips Head Screwdriver...
  • Page 27 Test-fit and glue the two windscreens to the fuselage, using a thin bead of Formula 560 Canopy Glue. Remove any excess glue, using a paper towel and water, and use pieces of masking tape to hold the windscreens in place until the glue completely dries. STEP 3: INSTALLING THE ELECTRONIC SPEED CONTROL Carefully solder the positive and negative motor wires to the motor wires on your ESC, being careful that the polarity is correct.

  • Page 28: Section 15: Balancing The Pt-19 Cornell Ep Arf

    2-1/8" (54mm). IMPORTANT Balance the PT-19 Cornell EP ARF with the flight battery installed and the airplane fully assembled. Install the wing onto the fuselage. Apply two short pieces of masking tape onto the top of the wing, 2" (51mm) back from the leading edge, measured at the fuselage sides.

  • Page 29: Section 16: Control Throws

    SECTION 16: CONTROL THROWS The control throws listed in this section are for test-flying and general sport-flying. If you want the airplane to be more aerobatic and responsive, we suggest increasing the control throws in small amounts until you find your desired settings. TEST-FLYING SPORT-FLYING Ailerons:...

  • Page 31: Product Evaluation Sheet

    Global Hobby Distributors will not disclose the information it collects to outside parties. Global Hobby Distributors does not sell, trade, or rent your personal information to others. Your privacy is important to us. Kit: WattAge PT-19 Cornell EP ARF # 128387 Was any of the assembly difficult for you? If yes, please explain.
  • Page 32 _____________________________ _____________________________ Post Office will not deliver _____________________________ without proper postage (Return Address Here) Global Hobby Distributors Attn: Global Services 18480 Bandilier Circle Fountain Valley CA 92728-8610 Fold along dotted line...

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