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Global Hobby Ryan STA Assembly Instruction Manual

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FULL-SCALE SPECIFICATIONS:
Span: 30 ft.
Length: 21 ft. 6 in.
Height: 10 ft. 1 in.
Weight: 1,600 lbs. loaded
Engine: Menasco L-365 engine/125 hp.
Maximum speed: 128 mph.
Cruising speed: 118 mph.
Range: 350 miles
Service Ceiling: 10,000 ft.
The Ryan STA is a classic aircraft known for it great handling when modeled. The Sportsman Aviation Ryan STA ARF, finished in YPT-16 military
version colors combines all the classic looks with a very easy to assemble and fly model airplane.
In full scale, it's a low-wing monoplane of mixed construction; a metal fuselage, wooden wing spars with fabric covering and external wire bracing.
The Ryan STA/YPT-16 has tandem open cockpits and was used by the Army Air Corps for primary training. It was the first monoplane acquired
by the Army as a primary trainer. From 1940 to 1942, the Army Air Corps bought nearly 1,200 more similar Ryan trainers as PT-20s, PT-21s, and PT-22s.
We know you'll enjoy owning and flying this historical and beautiful aircraft.
INSTRUCTIONS FOR FINAL ASSEMBLY
The Sportsman Aviation Ryan STA ARF is distributed
exclusively by Global Hobby Distributors
18480 Bandilier Circle, Fountain Valley, CA 92708
All contents copyright © 2004, Global Hobby
Distributors Version V1.0 February 2005
IMPORTANT
The Sportsman Aviation Ryan STA ARF is not intended for inexperienced pilots. It is not 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.
Ryan STA ARF Specifications:
Wing Span: 57 Inches (1447mm)
Wing Area: 488 Square Inches (31.5dm
Length: 41 Inches (1041mm)
Weight RTF: 60-68 Ounces (1700-1930gr)
Wing Loading: 17 - 20 Ounces Per Square Foot (54 -61gr/dm
Functions: Ailerons, Elevator, Rudder and Throttle
Engine Required: .28 - .46 Two-Stroke or .52 Four-Stroke
Radio Required: 4 Channel or More w/5 Standard Servos
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Kit Product Number 127598

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Summary of Contents for Global Hobby Ryan STA

  • Page 1 Service Ceiling: 10,000 ft. The Ryan STA is a classic aircraft known for it great handling when modeled. The Sportsman Aviation Ryan STA ARF, finished in YPT-16 military version colors combines all the classic looks with a very easy to assemble and fly model airplane.

  • Page 2: Table Of Contents

    Section 3: A Note About Covering ............5 Section 18: Final Assembly ..............35 Section 4: Kit Contents ................ 6 Section 19: Balancing the Ryan STA ARF ........37 Section 5: Wing Assembly ..............7 Section 20: Control Throws ............... 37 Section 6: Stabilizer Installation ............

  • Page 3: Introduction

    INTRODUCTION Thank you for purchasing the Sportsman Aviation Ryan STA ARF. Before completing the final assembly of your new airplane, please carefully read through this instruction manual in its entirety. Doing so will ensure your success the first time around!

  • 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 Sportsman Aviation Ryan STA 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: Tools And Supplies Required

    SECTION 2: TOOLS AND SUPPLIES REQUIRED The tools and supplies listed below will be necessary to finish the assembly of your new Sportsman Aviation Ryan STA ARF. We suggest having these items on hand before beginning assembly. Kwik Bond Thin C/A # 887500...

  • Page 6: Section 4: Kit Contents

    SECTION 4: KIT CONTENTS We have organized the parts as they come out of the box for easier identification during assembly. Before you begin assembly, group the parts as we list them below. This will ensure that you have all of the parts before you begin assembly and it will also help you become familiar with each part.

  • Page 7: Section 5: Wing Assembly

    MISCELLANEOUS WING PARTS MISCELLANEOUS FUSELAGE PARTS (1) Molded Cowling (1) Plywood Wing Joiner (1) Spinner Assembly w/Backplate & Screws (1) M4 x 20mm Socket-Cap Screw (1) 10 x 6 Composite Propeller (for .40 & .46 Size Engines Only) (1) M4 Flat Washer (2) Molded Windscreens (1) Molded Fuselage Fairing A complete replacement parts listing, along...
  • Page 8 Set the servo into place, making sure that the servo output shaft is toward the root edge of the wing panel. Install the aileron servo, making sure to drill 1/16" diameter pilot holes for the mounting screws. Repeat the previous procedures to install the aileron servo into the second wing panel. STEP 2: ALIGNING THE WING PANELS Using a modeling knife, cut away and remove the excess covering material that overlaps onto the root ribs of each wing panel, leaving...
  • 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 the 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. IMPORTANT If the wing panels do not fit together properly, remove the wing joiner and use 220 grit sandpaper with a sanding block to lightly sand the edges and tips of the wing joiner, until you are satisfied with the fit.

  • Page 10: Section 6: Stabilizer Installation

    STEP 4: CHECKING THE WING CENTER-SECTION JOINT Once the epoxy has fully cured, remove the masking tape and double-check the center-section joint. If any gaps are present, mix a small quantity of 30 minute epoxy and carefully fill any remaining gaps. IMPORTANT Do not omit this procedure.
  • Page 11 When you're satisfied that the stabilizer is centered at the trailing edge, draw a mark on each side of the stabilizer (at the trailing edge) where it meets the fuselage sides. With the marks on the stabilizer lined up with the fuselage sides, hold only the trailing edge of the stabilizer in position, using a T-Pin.
  • Page 12 STEP 3: MOUNTING THE HORIZONTAL STABILIZER When satisfied with the alignment, use a pencil to draw a line on each side of the stabilizer where it meets the fuselage sides. Do this on both the top and the bottom. Remove the stabilizer from the fuselage and carefully use a modeling knife to cut away and remove the covering material from between the lines you drew.

  • Page 13: Section 7: Control Surface Hinging

    While holding the vertical stabilizer firmly in place, use a pencil to draw a line on each side of the vertical stabilizer where it meets the top of the fuselage. STEP 5: MOUNTING THE VERTICAL STABILIZER Remove the vertical stabilizer and use a modeling knife to carefully cut away and remove the covering material from below the lines you drew.
  • Page 14 Important Information About the C/A-Style Hinges Included with Your Ryan STA ARF The Ryan STA 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: Section 8: Tail Wheel Installation

    STEP 2: HINGING THE ELEVATOR HALVES AND THE RUDDER Hinge the elevator halves, using the same techniques that you used to hinge the ailerons. Each elevator half is hinged using three hinges. When hinging the elevator halves, the tip of each elevator half should be even with the tips of the horizontal stabilizer and there should not be more than a 1/32"...
  • Page 16 Place the tail wheel bracket onto the bottom of the fuselage. To align the bracket, the pivot point of the tiller arm should be even with the rudder hinge line and the bracket should be centered over the middle of the fuselage.

  • Page 17: Section 9: Landing Gear Installation

    SECTION 9: LANDING GEAR INSTALLATION YOU'LL NEED THE FOLLOWING PARTS FROM THE KIT: (2) Wheel Collars w/Grub Screws (2) Prebent Landing Gear Struts (8) M2 x 8mm Wood Screws (2) Molded Landing Gear Fairings (16) M3 x 12mm Wood Screws (2) Main Gear Wheels (8) Landing Gear Straps YOU'LL NEED THE FOLLOWING TOOLS AND SUPPLIES:...
  • Page 18 STEP 2: INSTALLING THE LANDING GEAR FAIRINGS AND WHEELS Temporarily slide one wheel onto one axle and use a wheel collar with grub screw to hold it in place. The wheel should be able to spin freely, but not move side to side. Using a rotary tool with a cutting disc, carefully cut off the excess axle flush with the wheel collar.

  • Page 19: Section 10: Engine Installation

    SECTION 10: ENGINE INSTALLATION YOU'LL NEED THE FOLLOWING PARTS FROM THE KIT: (4) M3 Flat Washers (2) Engine Mounting Beams (4) M3 Split Washers (4) M4 x 18mm Socket-Cap Screws (4) M3 Hex Nuts (4) M3 x 25mm Socket-Cap Screws (4) M4 Flat Washers (1) Spinner Assembly w/Backplate &...

  • Page 20: Section 11: Throttle Control System Installation

    With the fuselage on its side, set the engine onto the engine mounting beams. Using a ruler, measure the distance from the firewall to the back of the spinner backplate. Adjust the depth of the engine so that the measurement is 4-3/16". IMPORTANT The back of the spinner backplate must be 4-3/16"...
  • Page 21 Install the throttle servo into the plywood servo tray, making sure to drill 1/16" diameter pilot holes for the mounting screws. IMPORTANT The servo output shaft should be toward the back of the fuselage, as shown. You should mount the throttle servo on the same side of the servo tray that your engine's throttle arm is on.
  • Page 22 STEP 3: INSTALLING THE ADJUSTABLE PUSHROD CONNECTOR Using a modeling knife, cut away all but one arm from a "4-point" servo horn. Enlarge the hole in the servo arm that is 9/16" out from the center of the servo arm, using a 5/64" diameter drill bit. Install the adjustable pushrod connector onto the servo arm, using two flat washers (one on top of the servo arm and one on the bottom) and the hex nut provided.

  • Page 23: Section 12: Fuel Tank Assembly And Installation

    SECTION 12: FUEL TANK ASSEMBLY AND INSTALLATION YOU'LL NEED THE FOLLOWING PARTS FROM THE KIT: (1) 280cc Fuel Tank (1) Fuel Pick-Up "Clunk" (1) Nylon Fuel Tank Cap (1) Nylon Straight Fuel Pick-Up Tube (1) Rubber Stopper (2) Nylon 90º Vent Tubes (1) Nylon Stopper Backplate (1) M3 x 22mm Self-Tapping Screw (1) Silicone Fuel Tubing...

  • Page 24: Section 13: Elevator Control System Installation

    When satisfied with the alignment, tighten the self-tapping screw until the rubber stopper expands and seals the fuel tank opening. IMPORTANT Don't overtighten the self-tapping screw or you might strip the threads in the nylon backplate or split the front of the tank. With the stopper assembly installed, double-check to make sure that the fuel pick-up can move freely inside the fuel tank.
  • Page 25 STEP 1: INSTALLING THE ELEVATOR SERVO Install the rubber grommets and brass collets onto your elevator servo, making sure to install the collets with the flanges toward the bottom of the servo. Install the elevator servo into the plywood servo tray, making sure to drill 1/16"...
  • Page 26 STEP 3: CONNECTING THE PUSHROD ASSEMBLY Carefully thread one nylon clevis onto each threaded pushrod wire. For security, thread the clevises on completely. Snap each clevis into the outermost hole in the control horns. IMPORTANT Move the elevator halves up and down to double- check that the pushrod assembly is not binding.

  • Page 27: Section 14: Rudder Control System Installation

    Attach the servo horn to the Z-Bend, then reinstall the pushrod assembly and attach the servo horn to the servo, making sure that the servo horn is centered. With both elevator halves still centered, reinstall the clevises and install and tighten the servo horn retaining screw, provided with your servo, to secure the servo horn into place.
  • Page 28 Install the rudder servo onto the plywood blocks, making sure to drill 1/16" diameter pilot holes for the mounting screws. IMPORTANT The servo output shaft should be toward the front of the fuselage, as shown. The rudder servo should be centered between the throttle and elevator servos, but make sure that the end of the elevator servo arm will not hit the side of the rudder servo.
  • Page 29 STEP 3: INSTALLING THE PULL-PULL CABLES Using a pair of wire cutters, carefully cut the stranded steel cable exactly in half. If the ends of the cable begin to unravel, use your fingers to twist the ends back into shape. Make sure to use the steel cable, not the stretchy rigging cable. Working with one length of cable for now, slide one flanged crimp collet, non-flanged side first, over one end of the cable.

  • Page 30: Section 15: Aileron Control System Installation

    Carefully attach the length of cable from the left side of the fuselage to the threaded coupler on the left side of the servo arm, then attach the length of cable from the right side of the fuselage to the threaded coupler on the right side of the servo arm, using the same techniques that you used previously.
  • Page 31 Connect your radio system and plug one aileron servo into the receiver. Center the servo by double-checking that the aileron trim lever on your transmitter is centered. Install the Z-Bend in one pushrod wire into the hole in the servo arm that you enlarged.

  • Page 32: Section 16: Cowling Installation

    SECTION 16: COWLING INSTALLATION YOU'LL NEED THE FOLLOWING PARTS FROM THE KIT: (4) M3 x 10mm Flange-Head Wood Screws (1) Molded Cowling (1) Spinner Assembly w/Backplate & Screws YOU'LL NEED THE FOLLOWING TOOLS AND SUPPLIES: Kwik Bond Thin C/A Ruler # 1 Phillips Head Screwdriver Pencil Excel Modeling Knife...

  • Page 33: Section 17: Wing Struts Installation

    STEP 2: MOUNTING THE COWLING With the cowling held firmly in alignment, drill 5/64" diameter pilot holes into the cowling and through the fuselage for the four wood screws. Position the holes 3/16" in front of the back edge of the cowling. One hole should be centered on each side of the cowling and one hole should be centered on the top and the bottom of the cowling.
  • Page 34 STEP 1: INSTALLING THE WING STRUTS Using a pair of scissors, carefully cut out the four molded plastic wing strut fairings along the molded scribe lines. Using a modeling knife, carefully cut out the molded slot in the middle of each wing strut fairing. Using 220 grit sandpaper with a sanding block, lightly sand the edges of the wing strut fairings smooth.

  • Page 35: Section 18: Final Assembly

    One length of rigging cable is used for each side of the wing. Use the photo below to follow the attachment sequence: A) Secure one end of the rigging cable to the rear screw on the wing. Loop the rigging cable under the screw's head and tighten the screw. Use a modeling knife to cut off the excess rigging cable.
  • Page 36 Carefully apply the black striping tape to the outside surface of both windscreens to simulate the windscreen frames. 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 cures.

  • Page 37: Section 19: Balancing The Ryan Sta Arf

    SECTION 20: CONTROL THROWS We recommend initially setting up the Ryan STA ARF using the Test-Flying control throws. These control throws are suggested for initial test-flying because they will allow the airplane to fly smoother and make it easier to control. Once you're familiar with the flight characteristics of the airplane, you might want to increase the control throws to the sport-flying settings.

  • Page 38: Section 21: Preflight Check And Safety

    SECTION 22: REPLACEMENT PARTS We stock a complete line of replacement parts for your Sportsman Aviation Ryan STA 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 39: Product Evaluation Sheet

    Do not use staples and make sure our address faces out. 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.
  • Page 40 _____________________________ _____________________________ 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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