User Manual

ManualsBrandsSeagull Models ManualsAircraftsB-25 Mitchell (Khaki)

Specications:

Wingspan--------------- 95.0 in (241.2 cm).

Wing area--------------- 1191.0 sq.ins (76.8 sq.dm).

Weight------------------- 24.2 lbs (11.0 kg).

Length------------------- 75.7 in (192.3 cm).

Engine/Motor size----- 20cc gasoline engine.

Radio--------------------- 11 channels with 14 servos.

SEA 330 : Without electric retracts landing gear.

SEA330gear: including Electric retracts landing gear.

ASSEMBLY MANUAL

Code : SEA 330

Summary of content (71 pages)

PAGE 1
Code : SEA 330 ASSEMBLY MANUAL Speciications: Wingspan--------------- 95.0 in (241.2 cm). Wing area--------------- 1191.0 sq.ins (76.8 sq.dm). Weight------------------- 24.2 lbs (11.0 kg). Length------------------- 75.7 in (192.3 cm). Engine/Motor size----- 20cc gasoline engine. Radio--------------------- 11 channels with 14 servos. SEA 330 : Without electric retracts landing gear. SEA330gear: including Electric retracts landing gear.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” INTRODUCTION hank you for choosing the Mitchell B-25 -for 20cc engines-95” ARTF by SG MODELS .he Mitchell B-25 -for 20cc engines-95” was designed with the intermediate/advanced sport lyer in mind. It is a semi scale airplane which is easy to ly and quick to assemble. he airframe is conventionally built using balsa, plywood to make it stronger than the average ARTF, yet the design allows the aeroplane to be kept light.
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KIT CONTENTS HINGING THE AILERON SEA330 Mitchell B-25 -for 20cc engines-95” 1. Fuselage 2. Wing set (2) 3. Tail set (2) 4. Canopy 5. Cowling (2) 6. landing gear 7. Pilot 8. Fuel tank 9. Aluminum wing tube 10. Ep Motor box Note : he control surfaces, including the ailerons, elevators, and rudder, are prehinged with hinges installed, but the hinges are not glued in place. It is imperative that you properly adhere the hinges in place per the steps that follow using a high-quality thin C/A glue.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” Delect the aileron and completely saturate each hinge with thin C/A glue. he ailerons front surface should lightly contact the wing during this procedure. Ideally, when the hinges are glued in place, a 1/64” gap or less will be maintained throughout the lengh of the aileron to the wing panel hinge line. 6.
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WING TIP BULBS 4. Please see below pictures. 1. 5. CA glue hey are designed to operate on voltages 12 volts. 2. 6. 3. 7.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 8. 4. Epoxy Fiberglass control horn INSTALL THE AILERONS CONTROL HORN INSTALL FLAP CONTROL HORN Install the lap control horn using the same method as same as the aileron control horns. 1. 1. Fiberglass control horn 2. 2. 3. 3.
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Use drill bit in a pin vise to drill the mouting holes in the blocks. INSTALLING THE ALLERON SERVOS 4. 1. Apply 2-3 drops of thin C/A to each of the mounting holes. Allow the C/A to cure without using accelerator. 2. 5. C/A glue Minimum servo spec. Torque : 194 oz-in (14 kg-cm) @ 6.0V; 236 oz-in ( 17kg-cm) @ 7.4V Because the size of servos difer, you may need to adjust the size of the precut opening in the mount. he notch in the sides of the mount allow the servo lead to pass through.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” Apply 1-2 drops of thin C/A to each of the mounting tabs. Allow the C/A to cure without using accelerator. 11. 8. C/A glue 12. Remove the string from the wing at the servo location and use the tape to attach it to the servo extension lead. Pull the lead through the wing and remove the string. Set the aileron hatch in place and use a Phillips screw driver to install it with four wood screws. 9. 13. 3x10mm 10. 14.
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15. 1. 80mm 2. AILERON PUSHROD INSTALLATION Please see below pictures. 1. 80mm INSTALLING THE FLAP PUSHROD Repeat the procedure for the aileron pushrod. 2. 1. INSTALLING THE FLAP SERVO 2. Repeat the procedure for the lap servo.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” SET UP BOTTOM HATCH SYSTEM 5. Please see below pictures. 1. 6. 2. 7. 3. 8. 4.
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9. 13. 10. ENGINE MOUNT INSTALLATION Locate the items necessary to install the engine mount included with your model. 1. 11. 2. 2mm 12.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 3. 7. 4. 8. 3x10mm 5. 9. hread locker glue 4x30mm 6. 12 Use four 4x30mm head bolts and four 4mm washers to attach the engine mount rails to the irewall. Tighten the screws . Make sure to use threadlock on the screws to help prevent them from vibrating loose.
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10. 13. 4x30mm Use a drill to drill the four holes in the engine mount rails. 14. 11. 4mm 15. Position the engine with the drive washe (140mm) forward of the irewall as shown. 12. 16.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” Using a modeling knife, cut one length of silicon fuel line. Connect one end of the line to the weighted fuel pick up and the other end to the nylon pick up tube. Reinstall the servo horn by sliding the connector over the pushrod wire. Center the throttle stick and trim and install the servo horn perpendiular to the servo center line. 1. 17. Move the throttle stick to the closed position and move the carburetor to closed. Use a 2.
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Test it the stopper assembly into the tank. It may be necessary to remove some of the lashing around the tank opening using a modeling knife. If lashing is present, make sure none falls into the tank. 2. With the stopper assembly in place, the weighted pick-up should rest away from the rear of the tank and move freely inside the tank. he top of the vent tube should rest just below the top of the tank. It should not touch the top of the tank.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” Set up sevor to pull the cover of the box. OPTIONAL RETRACTABLE LANDING GEAR 6. If you want to use retracts in your Michell B-25-for 20cc engines 95”, it is a very popular add-on as optional, we recommend that you buy a good set of electric retracts as the Himark AM07 Main Gear and Himark AM08 Nose Gear shown as below. Nose Gear. 1. Minimum servo spec. Torque : 61.10 oz-in (4.4 kg-cm) @ 4.8V; 76.37 oz-in (5.5 kg-cm) @ 6.0V 7. 2. 8. 3.
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4. ELECTRIC RETRACTABLE LANDING GEAR Electric retractable landing gear is included in this kit shown as below. 1. Main Gear. 5. 2. If you use the Himark Mair gear, please cut of so that length is 170mm shown as below. 6. 3.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 4. 8. 3x15mm 5. 9. 6. 10. 7. 11.
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12. 16. 13. 17. 6x25mm hread locker glue 14. 18. 15. 19.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 20. 24. 2mm 21. 25. 22. 26. 80mm 23. 20 27.
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28. 32. 29. 33. 30. 34. Pen 31. 35. 1.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 36. 40. 2x8mm 1.5mm 37. 41. 2x8mm 38. 42. 39. 43.
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44. 48. 45. 49. 46. 50. 2mm 2mm 47. 51.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 52. 56. 53. 57. 60mm 54. 58. 55. 59.
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4. COWLING Please see below pictures. 1. 5. 2mm 2. 6. 3. 3x15mm 7.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 8. 12. 9. 13. 3mm 10. 14. 11. 15.
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16. 20. 17. 21. 18. 22. 19. 23.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 24. 28. 25. 29. 26. 30. 27. 31.
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ELECTRIC POWER CONVERSION 3. Locate the items neccessary to install the electric power conversion included with your model. 1. 4. Recommend the items necessary to install the electric power conversion parts included with your model. M4x25mm and washers - Motor: 110 - 2000 Watts - Propeller: 17x8 ~ 19x10 - ESC: 85A - 8S- 9S Lipo Attach the electric motor box to the irewall suitable with the cross lines drawn on the electric motor box and irewall.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 6. 9. Blind nut 7. 11. 4mm 12. hen, use 5.5mm drill bit to enlarge the holes on the electric motor box. M4x20mm 8. 5.5mm 13.
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14. 18. Balsa stick Epoxy 15. 19. 2mm 16. 20. 17. 21.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 22. 26. 23. 27. 24. 28. 25. 29.
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30. 3. STABILIZER SET INSTALLTION 4. Please see below pictures. 1. Minimum servo spec. Torque : 194 oz-in (14 kg-cm) @ 6.0V; 236 oz-in ( 17kg-cm) @ 7.4V 2. ELEVATOR INSTALLTION SERVO 5.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 6. 10. 7. 2. 11. 1.5mm 8. 12. C/A glue 9. 34 13 .
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ELEVATOR PUSHROD HORN INSTALLATION RUDDER SET INSTALLTION Please see below pictures. 1. 1. 80mm 2. 2. 3. 3. 4.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 7. 4. 8. 5. Minimum servo spec. Torque : 61.10 oz-in (4.4 kg-cm) @ 4.8V; 76.37 oz-in (5.5 kg-cm) @ 6.0V 9. 6. RUDDER PUSHROD HORN INSTALLATION Epoxy 1.
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2. 6. 3. 7. 4x15mm 4. 8. 5. 9.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 10. 3. Epoxy 11. 4. PILOT INSTALLTION ON STABILIZER Please see below pictures. 5. 1. C/A glue 2. 38 6.
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7. INSTALLING THE ENGINE SWITCH 1. Trim and cut INSTALLING THE RECEIVER SWITCH Install the switch into the precut hole in the side, in the fuselage. 2. Switch 1. 3/32” Hole. 2. . ELECTRIC GEAR NOSE INSTALLTION Trim and cut Please see below pictures. 1. 3.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 2. 5. 3. 6. 7. 4. 8. Minimum servo spec. Torque : 61.10 oz-in (4.4 kg-cm) @ 4.8V; 76.37 oz-in (5.5 kg-cm) @ 6.
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9. 13. 3x12mm 10. 14. 11. 15. NOSE GEAR INSTALLTION 16. 12.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 17. 21. 3x3mm 18. 22. 19. 23. 20. 24.
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25. 29. 26. 30. Epoxy 27. 31. 28. 32.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 33. 37. 34. 38. C/A glue 35. 39. 2x8mm 36. 44 40.
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41. BOMB BAY DOOR SYSTEM INSTALLATION 1. 42. 2. SERVO GEAR INSTALLATION 1. 3. Minimum servo spec. Torque : 91.65 oz-in (6.6 kg-cm) @ 4.8V; 113.87 oz-in (8.2 kg-cm) @ 6.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 4. 8. 5. 9. Epoxy 6. 10. 7. 11.
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12. 16. 13. 17. Epoxy 14. 18. 15. 19.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” INSTALLATION COCKPIT, PILOT AND CANOPY 4. Locate items necessary to install. 1. 5. 2. 6. 3. 7.
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8. 12. 9. 13. 10. 14. 11. 15.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 16. 20. 17. 21. 18. 22. Epoxy Epoxy 19. 50 23.
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24. 28. 25. 29. 26. 30. Epoxy 27. 31.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 32. 36. 33. 37. 34. 38. 35. 39.
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40. 44. 41. 45. Epoxy 46. 42. Epoxy 43. 47.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 48. 52. Epoxy 49. 53. Epoxy 50. 54. 51. 55.
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56. 60. 57. 61. 58. 62. 59. 63.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 64. 68. 65. 69. 66. 70. 67. 71.
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72. 76. 73. 77. 74. 78. 8mm Epoxy 75. 79.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 80. 84. C/A glue 81. 85. 82. COKPIT INSTALLATION ON TOP HATCH Locate items necessary to install. 1. 83.
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2. 6. 3. 7. 4. 8. Epoxy 5. 9.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 10. 14. 11. 15. Epoxy C/A glue 12. 13. 60 16.
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INSTALL THE PLASTIC PARTS. 4. Locate the items neccessary to install the plastic parts included with your models: 1. 5. 2. 6. 3. 7. Position the plastic parts onto the canopy and fuselage and apply C/A glue and hold the plastic parts secure until the glue fully cures. Please see pictures below.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 8. GUN INSTALLATION TWO SIDE OF FUSLAGE Please see pictures below. 1. 9. 2. 10. 3. 11.
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8. 4. 6mm Epoxy 5. 9. 6. 10. 7. 11.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 12. 16. 13. 17. 14. 18. 15. 19.
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20. 4. Epoxy STABILIZER INSTALLATION INTO FUSELAGE 5. Please see below pictures. 1. 6. 2. 7. 3.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 8. 12. 4x20mm hread locker glue 9. 13. 10. 14. 11. 15.
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ATTACHMENT WING-FUSELAGE 4. Attach the aluminium tube into fuselage. 1. APPLY THE DECALS 2. 1) If all the decals are precut and ready to stick. Please be certain the model is clean and free from oily ingerprints and dust. Position decal on the model where desired, using the photos on the box and aid in their location. 2) If all the decals are not precut, please use scissors or a sharp hobby knife to cut the decals from the sheet.
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Instruction Manual. Mitchell B-25 -for 20cc engines-95” 3) With the model inverted, place your ingers on the masking tape and carefully lit the plane. his is the point at which your model should balance for your irst lights. Later, you may wish to experiment by shiting the balance up to 10mm forward or back to change the lying characteristics.
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30-40mm 30-40mm Fuselage Wing 25-30mm 25-30mm 20-25mm 20-25mm 30mm 60mm 69
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Mitchell B-25 -for 20cc engines-95” Instruction Manual. FLIGHT PREPARATION PREFLIGHT CHECK Check the operation and direction of the elevator, rudder, ailerons and throttle. 1) Completely charge your transmitter and receiver batteries before your irst day of lying. A) Plug in your radio system per the manufacturer’s instructions and turn everything on. 2) Check every bolt and every glue joint in the Mitchell B-25 -for 20cc engines-95” to ensure that everything is tight and well bonded.
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