Red Star RC LaGG-3 Instruction Manual

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LaGG-3

Instruction Manual

Wingspan: 66 in. (1676 mm.) Wing Area: 980 sq. in. (63.23 dm

)

Weight: 9.5 – 10.5 lbs (4082g – 4536 g) Length: 59 in. (1473 mm.) Wing Loading: 22- 24.5 oz per sq ft

(64.6-71.8 g per dm

)

308 Belltown Road, Owings Mills, MD 21117-3239

www.redstarrc.com

red_star_rc@yahoo.com

Thank you for purchasing Red Star RC LaGG-3 sport scale model Kit. This k it h as been designed using 3D computer engineering and inte rloc king construction design help you to build straight lightweight model. Low wing loading and built in washout make this model a good flying plane. Please keep in mind that this kit is intended for intermediate builder and intermediate pilot. If you do not meet these criteria, it is recommended to seek help from a more experienced builder / pilot.

Good luck! Mike & George.

Red Star RC, BALTIMORE, MARYLAND, USA

redstarrc@yahoo.com

WARRANTY…..Red Star RC 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 Red Star RC’s liability exceed the original cost o f the purchased k it. 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. 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 thi s product, the buyer is advised to return this kit immediately in new and unused condition to the place of purchase.

Our deep appreciation to Bennie Broughton aka Oryx on www.rcscalebuilder.com

for his time and

efforts he spent for deep aerodynamic analysis and recommendations for wing airfoil.

NOTES BEFORE BEGINNING CONSTRUCTION

• Read the instructions and the plan sheet prior to start any work.

• Do not remove the parts from sheets until required.

• Prior to gluing, test fit and match parts over the plan.

Kit Contents:

• Computer Drawn Plan Sheets 2

• Illustrated Instruction Manual 1

• Laser Cut Balsa and Plywood Parts Sheet 30

• Clear Canopy 1

• Fiberglass cowl 1

Additional Hardware (Required for completing kit):

6-32 Bolt-nut Set (4 bolts, 4 Flat Washers, 4 Lock Washers, 4 Blind Nuts) 1 Push rod (Du-Bro #230) Ailerons 1 E/Z Links (Du-Bro #855) Ailerons 1 E/Z Connectors (Du-Bro #121) 1 Push Rods Sullivan Gold-n-Rod 1 Mechanical Retracts .60 - .90 size 85

degrees 1

Du-Bro Nylon Large Straps 5/32"(4) Landing Gear Covers 1 Wheel Axels 2 Wheel Collars 2 Wheels 4” 2 Robart 121 Scale Retractable Tail wheel 1 Tail Wheel 1.75” 1 Fuel Tank 12 oz 1 Spinner 4.25”

(Dave Brown Vortech Standard S242-8242 & XX-long adapter nut) 1

Engine OS-.91FX 1 Muffler 1 Prop Master Airscrew 14x6 1

Robart 3/16" Super Point Hinges 23

Recommended Finishing Items:

MonoKote (Sky Blue 20206) 2 MonoKote (Gray/Green 20211/20214) 2 LustreKote Spray Paint 2 LustreKote Spray Flat Clear 2

Radio Gear:

7-channels receiver (9-channels recommended) 1 6” Servo Extension 2 12” Servo Extension 2 6” Y-servo Extensions 1 Standard Servos 8

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

Build the Stab & Elevator

Unroll the plan sheets. Put them on your building board and cover with wax paper so glue will not adhere.

1. Locate and carefully remove Elevator parts from balsa sheets. Test fit and sand them if necessary. Assemble using plan as a reference.

2. Glue precut leading edge ELE.

3. Glue precut tips EET and end blocks EEB.

4. Glue balsa reinforcing edges a n d san d to shape. Glue precut hinge blocks EHB.

5. Shape leading edge round.

6. Put stab ribs over the plan and fi x th em into position.

7. Glue central forward ply horizontal reinforcing stringer, rear reinforcing stringer, subleadning edges. Glue subtrailing edge and subtrailing edge doubler. Lightly sand it to prepare for sheeting.

8. Glue hinge blocks according to the plan using balsa leftovers. Prepare sheeting by gluing three 1/16”x4”x19.5” sheets together along longer side. Then cut it by half. Sheet top of the stub. Remove from building board and sheet bottom.

9. Glue precut stub tips HST together.

10. Glue tips to the stub. Glue centering piece HSCP in front of the stab.

11. Glue precut leading edges HS-LE to the stub.

Build the Fin & Rudder

1. Glue two rudder halves RF1-1 and RF1-2 together.

2. Glue two leading edges RLE together. G l ue ribs and resulting leading edge to rudder core.

3. Glue rudder bottom tips RBT together by pairs and glue them in place in the bottom of the rudder.

3. Glue hinge blocks and control horn support block from balsa leftovers according to the plan. Make sure they are lower than ribs.

4. Shape leading edge round.

5. Glue ribs VS1-1(goes up top) and VS1-2 together. Pla ce Ve rtical stab ribs over the plan. Glue subleading VSSLE and subtrailing VSSTE edges.

6. Sheet top of the stab. Remove it from building board.

7. Glue hinge block and shap e i t.

8. Sheet Vertical stab from the other side. Glue together two halves of stab tip VST and glue tip in place.

Build the fuselage

1. Locate and assemble top fuse formers.

Attention! All formers installed with markings

facing forward (toward nose).

2. Locate and assemble nose parts. Gl ue stringers together according to the plan.

3. Assemble fuse nose part over the pla n.

4. Glue two 1/8x1/4x24” side bass stringers together. Make two of them

5. Put them over the plan and form using t-pins. Join them with nos e pa rt.

6. Glue top formers according to the plan. Control ve r t i ca l us ing square.

7. Install horizontal stab saddle SS. Install top horizontal substringer FT1. Install stringers.

8. Glue sheeting support do ublers SSD. Install vertical stab.

9. Install canopy rear window former W.

10. Shape top substringer.

11. Sheet the fuselage with 1/16” balsa sheets. Do not sheet tail yet. We need an access to the pushrods installation.

12. Glue precut top stringer FT-2. Now it’s time to remove fuselage from the building board.

13. Build the motor box. Make sure everything strait and true. Fuelproof forward part from the outside using 30 min epoxy tinned with isopropyl alcohol. It will be hard to access it once installed in the fuselage.

14. Glue two firewall 1/8” light ply and one 1/16” burch ply formers. Attach motor mount aligning it using the reference lines.

15. Install blind nuts and secure them with CA.

16. Glue reinforcing triangles and install firewall using 30 min. epoxy.

17. Build retractable tail wheel former from F19-B, F20 and two TW’s.

18. Glue servo tray doublers F-STD to servo tray F-ST. Install servo tray into the fuselage.

19. Install motor box and remaining formers in th e fuselage. When installing former F21 you may need to unglue two side bass stringers from the last former VSSTE-T. Install Wing Support formers WS1 and WS2.

20. Install remaining stringe rs according to the plan.

21. Install wing support plate WSP and bolts doublers WSP-D underneath the plate.

22. Install two rudder hinge blocks using balsa leftovers.

23. Install pushrods according to the plan and glue them to the formers.

24. Build the fuselage part of a ir scoop from former AS4 and stringers ASS-2 and ASS-3.

25. Glue precut sheeting support WSS to wing saddle doublers and sand them into shape.

26. Sheet bottom of the fuselage except tail.

27. Install retractable tail wheel. Connect pull-pull cable. Sheet tail part of the fuselage.

28. Install pushrod support from both ends from balsa leftovers.

29. Install push rod end blocks from both sides.

30. Make elevator joint according to the plan from 3/32” rod.

31. Drill elevator halves according to the plan and test fit joint. Hinge elevator and horizontal stab.

32. Install pushrod with precut supported former EPSS.

33. Install horizontal stab. Glue sheeting support from both sides.

34. Sheet top. Glue precut vertical stab leading edge. Glue balsa block from balsa leftovers between vertical stab and top to form fairing later.

35. Sand fuselage to shape.

36. Glue tail block and sand it to shape. Glue vertical stab doubler VSTE.

37. Hinge rudder and install precut control horn.

38. Glue small triangle from balsa leftover to horizontal s tab and sand it to shape. Do th e same for another side.

Build the Ailerons

1. Glue two aileron tips together.

2. Glue ribs according to the plans. Glue aileron tips. Double tip goes to the bottom. Remember that the other aileron is a mirror copy of this one. Do not

build two identical ailerons!!!

3. Glue 1/8” end doublers AR-1D a n d AL-1D.

4. Glue precut leading edge.

5. Glue precut 1/4” balsa hinge blocks (by pairs from each side). Make sure they are lower than ribs. Sand them if necessary. Do not round leading edge yet.

Build the Wing

1. Glue wing rib doublers with 30min epoxy. Pay

attention on left/right position of the doublers!

2. Glue landing gears former doublers with 30min epoxy.

3. Make landing gear assembly with 30min epoxy.

4. Cut 1/2”x 1/4” central wing sect io n bass stringers according to the picture (6.5” and 2.5”).

They will

also be a retract servo tray.

5. Glue Top and Bottom wing bolt support blocks WBB. Top – WBB-1, WBB-2, WBB-3. Bottom – WBB-1, WBB-2, WBB-3, WBB-4

6. Glue central rib doublers R1-D. Make right and

left of them.

7. Glue flap servo doublers WFSD. They go on the opposite side than R4-B doubler! Make right

and left ribs!

8. Glue aileron rib doubler. Make right and left

of them!

9. Assemble central wing section accordin g to t h e plan.

10. Assemble subleading edge from WSLE-1 & WSLE-2

11. Assemble right wing on building board according to the plan. Glue aileron doubler.

12. Note flap and aileron trailing edge joint.

13. Sand the wing preparing it for sheeting.

14. Install shear web from 3/32 (1/16) leftovers. The last one goes from the other side in order that not to interfere with servo tray.

15. Prepare four sheathings from 1/16” balsa sheets according to the templates provided.

16. Install top Wing Bolt Support Block WB B and sand it to shape.

17. Sheet top of the wing. Live a space for flap sheeting on trailing edge

18. Build and sheet left wing the same way you built the right one

19. Put flap base on building board. Glue ribs according to the plan.

20. Glue additional R8 doubler on place according to the plan (goes from the narrow side!). Remember

to build right and left flaps!

21. Sand the edge of the flap at the rib angle

22. Sheet flap leading edge and top. Sand to shape.

23. Mount flap servos.

24. Glue balsa 1/4” leftovers to flap an d aile ron servo cover bases.

25. Glue them in place.

26. Build wheel well from 1/16” balsa leftovers and send them to shape.

27. Glue Landing gear shim from ply leftovers, sheeting support around from balsa and sand to shape.

28. Install retract servo, pushrods, retracts and test them for smooth operation.

29. Install hinge blocks according to the plan.

30. Mark hinge location and then hinge flaps.

31. Glue precut control horn in place.

32. Connect pushrod to test fit flap function.

33. Prepare wing flap top sheeting from precut 1/16” balsa sheet and 1” wide strip sandwich from 1/32” balsa and 1/32” ply according to the templates provided.

34. Sheet top of the wing flap area with ply reinforcing strip facing inside out.

35. Glue bottom wing bolt support blocks and sand them to shape.

36. Make four servo mounting blocks. Glue support blocks to servo covers and mount servos.

37. Sand the wing and sheet wing bottom. Cut servo openings.

38. Cut landing gear openings.

39. Cut central section of trailing edge according to the plan. Install central section trailing edge sheeting support blocks from 1/4” and 1/8” balsa leftovers, shape them and sheet the central section.

40. Glue 1/8” balsa strip alongside flap trailing edge and sand it flash with flap.

41. Cut pre-marked leading edges from 3/4x3x36 balsa sheet. Glue them to the wing

42. Pin ailerons to the wing. Make sure they in the right place (left and right). Cut and glue wing tips.

43. Glue forward side leading edge from leftovers 3/4x3x36 balsa sheet. Install wing dowels. Shape leading edge and wing tips according to the plan. Then round ailerons leading edges and hing e the m.

44.

Drill two holes and tap them 1/4x20. Sharp two plastic bolts and screw them in that sharp ends will come out about 1/4”. Place the wing onto saddle and align the way that distance between wingtips and tail equal. When satisfied push the wing down to mark holes location. Drill holes 1/4” dia.

45. Cut sheeting around holes and glue light ply bolt support pieces.

46. Build wing air scoop from formers AS1-AS3, stringers ASS-1 and . Glue sheeting support blocks around wing bolts.

47. Sheet air scoop. Cut sheeting around wing bolts.

48. Build forward wing fairing.

49. Sheet forward fairing and cut openings for landing gear.

Install the Fuselage components

1. Glue fairings. Fill the space with balsa and shape. Cut machine gun blisters and shape them to fit. Trim and fit canopy and rear windows.

2. Install machine guns from 1/16” tube and cannons from 1/4” tube sizes.

3. Install servos into servo tray, mount hardware.

4. Glue cowl support blocks from balsa leftovers.

5. Test fit cowl. Drill holes, temporary screw in. Remove it and put a drop of thin CA in balsa blocks.

6. Glue together plastic exhaust pipes.

7. Glue them in place. Add panel lines and rivets from aluminum foil self-adhesive tape.

8. Install throttle servo and pushrod supporting block.

9. Install Fuel tank and secure it with balsa block at the back and foam around. Battery pack strapped to the fuselage structure here to achieve proper balance. Your battery location may be different.

10. Fuel lines goes inside motor mount.

11. Throttle pushrod needs to be bent to reach carburetor arm.

12. We are using custom in cowl muffler.

Prepare the Model for Covering

1. Inspect all surfaces for uneven glue joints and seams that require filler. Apply fi ller where needed. Many small dents or scratches can be repaired by applying a few drops of water or moistening the area with a wet tissue. This will swell the wood, allowing you to sand it smooth after the balsa wood has dried.

2. Sand the entire model with progressively finer grits of sandpaper, finishing with 320 or 400-grit sandpaper.

3. Use a Tack Cloth to remove sanding dust from the model.

Balance the Model Laterally

1. Mount your wing to the fuselage. Temporarily install flaps, ailerons, rudder, elevator, landing gears, engine with prop and cowl.

2. With the wing level, carefully lift the model by the engine propeller shaft and the aft end of the fuselage at the bottom of the fin trailing edge (this may require two people). Do this several times.

3. If one wing always drops when you lift the model, that side is heavy. Balance the airplane by gluing weight inside the other wing tip. Glue the weight in place with epoxy. An airplane that has been balanced laterally will track better in loops and other maneuvers.

4. Remove all the part previous ly installed.

Cover the model

We won’t go into many details on covering techniques, assuming that you have already covered a couple of models in the past. We fiberglass our model and painted it with acrylic paint. Markings were painted over templates we made.

Cockpit

1. Cut the picture. Paint front panels gray.

2. Glue picture on the base, cower with t hi n c lear plastic and glue painted front pa ne l up top. Make switches from soft wire required diameter.

3. Site made from balsa leftovers and painted.

4. Stick made from balsa leftovers.

5. Pilot’s seat made from balsa leftovers and painted. All cockpit d etails glued in place.

Final assembly

• Reassemble all the hardware and make final check on all components. Permanently hinge all control surfaces.

• Glue canopy in place

• Check radio operation and control throws (first number is for low rates)

• Ailerons: 1/4” to 1/2 UP and DOWN

• Elevator: 1/2” to 1” UP and DOWN

• Rudder: 1/2” to 1” LEFT and RIGHT

• Throttle: Full range of throttle.

• CHECK BALANCE AS PER PLANS.

Landing Gear Cover

We made landing gear covers from thin aluminum

sheet and screwed them in with

Du-Bro Nylon

Large Straps 5/32"

PRE-FLIGHT CHECKOUT

• Make sure the servos are securely mounted and that the servo arms have their retaining screws in place.

• It is also a good idea to re-check all the push-rod connectors, fuel tank moun ting, fuel lines, wheels; engine mounting, prop and spinner.

• Range check the radio as per the manufacturer’s instructions and make sure it is fully charged.

DOUBLE CHECK EVERYTHING YOU CAN THINK OF!

A model and radio that is not prepared and w orking properly on the ground before take off will not improve in the air IT WILL GET WORSE! There is no point in attempting to fly until everything is 100% correct.

Please let us know what we could do to make this kit better!

308 Belltown Road, Owings Mills, MD 21117-3239

www.redstarrc.com

red_star_rc@yaho.com

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Red Star RC LaGG-3 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual