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Red Star RC Yak-3 Instruction Manual

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Wingspan:
Wing Area:
Weight:
5 – 5 1/2 lbs (2268g – 2495g)
Length:
Wing Loading:
Yak-3

Instruction Manual

55 in. (1397mm.)
680 sq. in. (43.87dm
50 in. (1270mm.)
17-18.6 oz per sq ft
2
(51.7-56.9g per dm
)
2
)
308 Belltown Road, Owings Mills, MD 21117-3239
www.redstarrc.com
red_star_rc@yahoo.com

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Summary of Contents for Red Star RC Yak-3

  • Page 1: Instruction Manual

    Yak-3 Instruction Manual Wingspan: 55 in. (1397mm.) Wing Area: 680 sq. in. (43.87dm Weight: 5 – 5 1/2 lbs (2268g – 2495g) Length: 50 in. (1270mm.) Wing Loading: 17-18.6 oz per sq ft (51.7-56.9g per dm 308 Belltown Road, Owings Mills, MD 21117-3239 www.redstarrc.com...

  • Page 2: Kit Contents

    Further, Red Star RC reserves the right to change or modify this warranty without notice. In that Red Star RC 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.

  • Page 3: Additional Hardware

    6” Servo Extension 6” Y-servo Extensions Futaba Standard Servo Items You May Need: Thin and Medium CA 30-min Epoxy Wax Paper or Plastic Wrap Razor Blades Different Grid Sand Paper Balsa Wood Filler Windex Isopropyl Alcohol © 2004 Red Star RC...

  • Page 4: Laser Cut Patterns

    Laser Cut Patterns © 2004 Red Star RC...
  • Page 5 © 2004 Red Star RC...

  • Page 6: Build The Stab & Elevator

    Sand LE of Horizontal Stab and Fin round. Sand LE them if necessary. Assemble using this figure as a of Elevator and Rudder triangle and TE round. reference. Fill the gaps with thick CA if needed. Hinge them according to the hinge locations. © 2004 Red Star RC...

  • Page 7: Build The Fuselage

    F-B and F-D together. 6. Splice two pieces 1/8” x 1/4” x 24” bass stringers together with an overlap as shown. Make two of 3. Glue two front halves F-A and F-C together. them. © 2004 Red Star RC...
  • Page 8 11. Install bottom 1/4”x 1/4” balsa stringer. 9. Locate two wing bolt support WB-A and WB-B 12. Locate TB-A and TB-B fuselage tail block and glue them together. halves. Glue them together and install in place. © 2004 Red Star RC...
  • Page 9 15. Using 30-min epoxy, glue together firewall FW-A and FW-B formers, motor mount ML-A and 18. Glue cockpit doublers f2 and f3 to the formers ML-B, MR-A and MR-B. F2 and F3. Glue 1/8”x 1/4” top fuse spar. © 2004 Red Star RC...
  • Page 10 T-pins alongside center of the fuselage side stringer. flexible. Bend it over formers and fix in bent Connect two sheets on sheeting support doubler. position using masking tape. Let it dry. Trim and glue it on fuselage. © 2004 Red Star RC...
  • Page 11 26. Sand side sheeting flash with formers. Cut 10” long sheet. Using the same technique, sheet the middle part of the fuselage. You will cut the opening for the cockpit later. 27. Here is closer look. 30. Here is the result. © 2004 Red Star RC...
  • Page 12 33. Glue 1/2”x1/2” balsa stringers at the bottom 36. Cover bottom front of the fuselage with 1/4" front of the fuse. Fill the gap between stringer and balsa and cut an opening for an air outlet. sheeting with 1/8” leftover balsa. © 2004 Red Star RC...
  • Page 13 39. Using 3/4”x 3” balsa block provided, build top 42. Glue small pieces of balsa leftovers in the engine cowl and glue it in place. middle of bottom cowl and shape them round. © 2004 Red Star RC...

  • Page 14: Build The Wing

    3. Glue ply rib doublers to the balsa ribs. Refer to will be removed later. Shape tail according to the drawing for doubler position. fixture shape. © 2004 Red Star RC...
  • Page 15 D according to the plan. down. 6. Glue leading and trailing edge parts together. 9. Glue two 1/16x4x24 sheets of balsa provided. Make two of them and then cut them across like on the picture. © 2004 Red Star RC...
  • Page 16 15. Glue shear web before sheeting the bottom of 12. Install top trailing edge sheeting using 1/16”x the wing. Remove rib tabs. 1/2” balsa strip provided and remove wing from building board. © 2004 Red Star RC...
  • Page 17 21. Glue retract servo tray in place. 18. Reinforce trailing joints using leftover balsa. 22. Test fit your retracts. Run pushrods. Connect 19. Do the same for the front one. radio and check retracts for smooth operation. © 2004 Red Star RC...
  • Page 18 24. Cut wheel well according to the template. opening. Flip the wing over. 28. Sheet forward top. 25. Glue central ribs in place. Glue a piece of 1/4"x1/4” balsa stick in the top of wing joiner for sheeting support. © 2004 Red Star RC...
  • Page 19 31. Sheet center top of the wing. 34. Cut 1 1/2 x 2 balsa block provided on two pieces 5” and 6” long. On each end of 6” block measure 1” from edges. Draw a line and cut across this line. © 2004 Red Star RC...
  • Page 20 37. Locate two 1/2” x 1” x 36” balsa strips. Cut 20” and glue leading edge to the wing. 41. Carve wing air scoops in shape for better scale appearance. 38. Carve and shape wing leading edge. © 2004 Red Star RC...

  • Page 21: Build The Ailerons

    Build the ailerons 44. Glue wing bolt support plate WBP in the middle of the wing. 1. Locate precut aileron 1/16” skins A-T and A-B, 3/32” subleading edge ASL and ribs AR-1 to AR-7. © 2004 Red Star RC...
  • Page 22 Put 1/16” leftover balsa in between aileron. Shape the leading edge of the aileron to of two middle formers to create some a gap. Make sure triangle shape. not to glue this spacer permanently. © 2004 Red Star RC...
  • Page 23 Install the Fuselage components 4. Glue servo screw doublers (they will be one piece from each side now). 1. Locate servo and battery tray, fuse pushrods support FR-3, 4, 5 and 1/2” x 1” balsa leftovers. © 2004 Red Star RC...
  • Page 24 9. Glue the other pushrod support formers in place and sand the ends of the pushrod tubes flash with fuselage. 7. Insert pushrod tube and support formers. 10. Sheet bottom of the fuselage and shape the edges. © 2004 Red Star RC...
  • Page 25 Cover center of the wing with wax paper. Put fairings and fuselage on. Trim if necessary and glue 16. Cut opening for a muffler. We are using J'tec them in place. in-cowl muffler for better scale appearance. © 2004 Red Star RC...
  • Page 26 Make fuel tank support rails 22. Cut canopy opening template from plans. Mark from leftover balsa and glue them in place. canopy opening location on the fuselage. © 2004 Red Star RC...
  • Page 27 27. Machine gun cowers could be made from 1/4” leftover balsa sanded into shape. 25. You can add more scale appearance by carving machine guns channels. We made machine guns 28. 1/7 scale pilot could be used. from 1/4” aluminum tube. © 2004 Red Star RC...

  • Page 28: Final Assembly

    1/2” to 1” LEFT and RIGHT weight in place with epoxy. An airplane that has • Throttle: Full range of throttle. been balanced laterally will track better in loops and • CHECK BALANCE AS PER PLANS. other maneuvers. © 2004 Red Star RC...
  • Page 29 IT WILL GET WORSE! There is 308 Belltown Road, Owings Mills, MD 21117-3239 no point in attempting to fly until everything is www.redstarrc.com 100% correct. red_star_rc@yahoo.com © 2004 Red Star RC...
  • Page 30 Yak-3 Paint scheme © 2004 Red Star RC...
  • Page 31 © 2004 Red Star RC...
  • Page 32 © 2004 Red Star RC...
  • Page 33 © 2004 Red Star RC...

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