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Century Radikal N640 Instruction Manual

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Kit Features:
8.58 :1 Main gear ratio
4.5:1 Tail gear ratio
Engineered for OS 55/YS56 motors or compatible
Carbon fiber frames for ultra-rigid and compact design
Push/Pull CCPM control system
Triple bearing supported 10mm hardened main shaft
120 degree dual race ball bearing metal swashplate
Stainless steel damper mounted bearing torque tube for high efficiency
Dual race ball bearing with thrust bearing supported tail blade grips
© 2012 Century Helicopter Products - All rights reserved.

Specifications:

Main Rotor Blade Diameter: 57.3 in /
145.5 cm (640 mm Blades)
Tail Rotor Blade Diameter: 10.25 in /
26.0 cm (92 mm Blades)
Length: 49 in / 124.50 cm
Height: 13.7 in / 34.80 cm
Width: 4.5 in / 11.45 cm
Version 1.00

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Summary of Contents for Century Radikal N640

  • Page 1: Specifications

    120 degree dual race ball bearing metal swashplate Width: 4.5 in / 11.45 cm Stainless steel damper mounted bearing torque tube for high efficiency Dual race ball bearing with thrust bearing supported tail blade grips Version 1.00 © 2012 Century Helicopter Products - All rights reserved.

  • Page 2: Thank You

    It is important for the user/pilot to be respon- sible for the damage the model is capable of inflicting on one’s self and others around the model during its operation. Century Helicopter Products, affiliated individuals, and shops/sellers hold no accountability for the operation or use of this model.

  • Page 3: Warranty Period

    To initiate a warranty claim, please be sure you have proof of purchase of the product. Century Helicopter Products reserves the right to inspect any and all items involved in a warranty claim.
  • Page 4 Radikal N640 AMA RULES & REGULATIONS General 1. Model aircraft will not be flown: (a) In a careless or reckless manner. (b) At a location where model aircraft activities are prohibited. 2. Model aircraft pilots will: (a) Yield the right of way to all man carrying aircraft.
  • Page 5 Radikal N640 HEAD ASSEMBLY (FLYBAR VERSION) Do not open all the bags prior to starting assembly. Open the bags step by step as you go through this BAG 1 instruction manual. The components are bagged to make assembly easier. The next few pages will per- tain to the assembly of the head.
  • Page 6 Radikal N640 HEAD ASSEMBLY (FLYBAR VERSION) BAG 1 16 17 Notice the direction of the blade grips as well as the direction of the flybar control arm. Ensure lubricant is applied to the thrust bearings. Be careful when taking the thrust bearings out of the blade grips. The radial bear- THRUST BEARING INSTALLATION GUIDE ings (part #4) should stay within the grips.
  • Page 7 Radikal N640 HEAD ASSEMBLY (FLYBAR VERSION) BAG 1 Do not over-tighten! M3X8CS Description Part # CNM3X22SCS CNM3LOCK M3 Locknut(M3螺母) M3 CNM3LOCK M3x8 Cap Screws(杯头螺丝) CNM3X8CS 10mm Main Shaft(主轴) HW5053 CNM3x3S S CNM3x3SS M3x3 Socket Head Set Screw(无头内六角螺丝) Aluminum Washout Guide(剪型臂导柱 )
  • Page 8 HEAD ASSEMBLY (FLYBAR VERSION) Radikal N640 BAG 1 Hint: To ensure this pin does out, periodically check it between flights. You also can apply a tiny drop of CA to either side of the pin. CNBB36 Description Part # CNLR1003 3X5X0.5 Flat Washer(平面垫片)
  • Page 9 Radikal N640 LINKAGE RODS (FLYBAR VERSION) BAG 1 NOTICE SIZE OF HOLES ON BALL LINKS THE SIDE WITH THE SMALLER HOLE SHOULD FACE OUTWARDS The linkage rods come pre-built. Even HEL PFUL TOOL though they are pre-built, you will need to verify their lengths.
  • Page 10 HEAD ASSEMBLY (FLYBARLESS) Radikal N640 The flybarless head comes pre-assembled BAG 1 however, it is only assembled as an ex- ample of how it should be assembled. The entire head will need to be taken apart and medium thread lock is required on all metal to metal parts.
  • Page 11 HEAD ASSEMBLY (FLYBARLESS) Radikal N640 BAG 1 The follower arms already come pre-assembled. DO NOT try to remove the bearings as they are factory installed. CNM3X22SCS CNM3x16BHCS Description Part # CNBB0830 CNM3X22SCS M3x22 Cap Screws(杯头螺丝) M3x12 Cap Screws(杯头螺丝) CNM3X12CS M3x5x3 HW6205 M3x3 Socket Head Set Screw (无头内六角螺丝)
  • Page 12 HEAD ASSEMBLY (FLYBARLESS) Radikal N640 BAG 1 CNLR1020 Description Part # M3 L=18MM M3 Ball Link L=18MM(M3 球头螺丝) CNLR1021 M3 Ball Link(M3 球头螺丝) CNLR1020 HW5146N NX Dual Ball Bearing Swashplate(十字盘) Page 12...
  • Page 13 LINKAGE RODS (FLYBARLESS) Radikal N640 BAG 1 HEL PFUL TOOL 54,5 PART# CN2255: CONTROL ROD SETUP GAUGE 73,5 CNLR1022SP Description Part # Pushrod Set( 连杆) HW5192A HI6145 Ball Link Set (26 Long, 4 Short)( 球头连接杆) HW5192A Pushrod Set( 连杆) Ball Link Set (26 Long, 4 Short)( 球头连接杆)
  • Page 14 CLUTCHBELL Radikal N640 BAG 2 This bearing is already pre-installed into clutchbell. CNM4x4SS Description Part # CNBB513 Hex Adapter( 六角启动头) HW6002 CNM4x4SS Set Screw(无头内六角螺丝)M4x4 CNBB513 Bearing(滚珠轴承)5x13x4 CNBB1015 Bearing(滚珠轴承)10x15x4 HW5043N Alloy Drive Gear 12T( 合金传动直齿轮) CNBB1524 HW6007G Bearing Block( 轴承座) CNBB1524 Bearing(滚珠轴承)15x24x5...
  • Page 15 FUEL TANK, MAIN SHAFT BEARING BLOCKS, ELEVATOR Radikal N640 BAG 2, 4, & 8 The bearings #6 & #8 are already factory installed. Please be sure to apply threadlock to the the M3x6 button head screw (#5). Hint: The A-Arm already comes assembled. To ensure the pin does not slide out during operation, please be sure to check it periodically between flights.
  • Page 16 SIDEFRAME ASSEMBLY Radikal N640 BAG 3, 4, 6, & 8 Ensure direction of Notice direc- Notice the direction bearing block. Bearing is tion of balls on the flanged bearing retained from the top. elevator arm. is facing within the Leave the bolts holding the- sideframe.
  • Page 17 ELECTRONICS MOUNT, MOTOR MOUNT, & RUDDER Radikal N640 BAG 2, 3 The rudder bellcrank is already pre-assembled. Leave this loosely in- stalled onto the frames for now as you may need to remove this when installing the tailboom assembly. The aileron bellcranks come pre-assembled.
  • Page 18 ENGINE, CLUTCH & FAN Radikal N640 BAG 1 The one-way bearing comes pre-installed into the clutch. CNM4x8CS CNM2.5x8CS CNM6X10FW CNM9.5X14FW CNM3x6BHCS Make sure to apply threadlock to these screws. INCLUDED Description Part # M4X10 Cap Screws( CNM4X10CS 杯头螺丝) Clutch One way Bearing (10mm) (单向轴承) CNBB1014A Clutch Shoe 59mm ( 离合器)
  • Page 19 FUTABA COMPATIBLE GOVERNOR MOUNT Radikal N640 BAG 2 CNM2.5x8CS CNM2x8PH Description Part # CNM2.5x8CS Cap Screw( 杯头内六角螺丝 )M2.5x8 HW5019N Governor Sensor Mounting Bracket(定速器固定座) NOT INCLUDED Governor Sensor(定速器) CNM4X6FW M4x6x0.5Flat Washer(平面垫片 ) CNM2X10PH M2x10 Phillips Screw(圆头十字螺丝 ) Page 19...
  • Page 20 FAN SHROUD Radikal N640 BAG 2 After the fan shroud is clamped together, spin the hex start shaft by hand to ensure the cooling fan is not rubbing within the fan shroud. If the cooling fan is rubbing, adjust the height of the engine.

  • Page 21: Landing Gear Assembly

    LANDING GEAR ASSEMBLY Radikal N640 BAG 5, 6 Remove these end caps and apply CA. Description Part # M3 CNM3LOCK HI5116N Bottom Frame( 机身底板) HI5122 Plastic Struts( 脚架) CNM3x4SS CNM3x4SS Set Screw(无头内六角螺丝)M3x4 HW5123N Tripod Stopper( 脚架塞) 3x8x1 HW5123N Aluminum Skids with Caps (脚架弯管) CNM3X20CS M3x20 Cap Screws(杯头螺丝)

  • Page 22: Servo Installation

    SERVO INSTALLATION Radikal N640 BAG 2 , 3 Because there are variances in the servo case heights, if you This requires a servo experience interference between the aileron servo controls and arm with a distance of the rudder control rod, install this M3x0.5 spacer between the 22mm from center of servo arm and M2 Steel Ball.
  • Page 23 Radikal N640 PUSHROD LENGTHS BAG 2, 7 The linkage rods come pre-built. Even though they are pre-built, you will need to verify their lengths. The diagram with lengths are drawn at a true to life scale with the exception of the tail control rod,...
  • Page 24 Radikal N640 TRANSMISSION GEAR BOX BAG 4, 7 When installing the bearings, be sure they fit into their prospective grooves on the transmission case. Do not forget to install part #8 & #10 (set screws) to hold the pins in place.

  • Page 25: Tailboom Assembly

    TAILBOOM ASSEMBLY Radikal N640 BAG 4, 7 DO NOT overtighten! Disassemble one end to slide through rudder control guides. Part # Description CNM3X8ST M3X8 Self Tapping Screw (割尾自攻螺丝) CNM3LOCK M3 Locknut(M3 螺母) CNM3x14BHCS M3x14 Button Head Screw(圆头内六角螺丝) HI6068A Horizontal Fin Mount( 水平翼固定座) CNM3x14BHCS Zip Tie(束带...

  • Page 26: Torque Tube

    TORQUE TUBE Radikal N640 BAG 7 Hint: The torque tube comes pre-assembled and in- stalled into the tailboom. To assist in removal for in- spection of the torque tube, use a little bit of rubbing alcohol and pour a little bit within the tailboom which will loosen the rubber bearing retainer.
  • Page 27 TAIL GEARBOX AND VERTICAL FIN Radikal N640 BAG 4, 7 To prolong the life of the gears they should be lubricated with a grease similar to Molykote EM-30L grease that is safe on plastics. Part # Description CNM3LOCK M3 Locknut(M3 螺母) CNBB1521 Tail Gear Box(后齿轮箱)
  • Page 28 TAIL BLADE GRIPS Radikal N640 BAG 2 The tail assembly comes assembled for your example only. It is ne- cesssary to disassemble the tail blade grips to apply thrust bearing grease to the thrust bearings. It is also important to remove the set screw from the tail rotor hub and apply medium threadlock to this set screw.

  • Page 29: Main Gear Assembly

    MAIN GEAR ASSEMBLY Radikal N640 BAG 2 For the roller bearings, we recommend a very light oil. The oil MUSTNOT attack/break down plastic as this could damage the cage in the one-way bearing. Prior to applying oil, make sure to clean the roller bearings with a cotton swab making sure there is no debris in the bearings.
  • Page 30 Radikal N640 INSTALLING MAIN GEAR AND HEAD BAG 2, 3 CNM4x3SS CNM2.5x8CS Ø3x23.7 10x18x1 It is easier to perform this assembly if you separate the head from the main shaft. 10x14x1 CNM3x8BHCS Part # Description Mast Stopper( 主轴限位块) HW6054 Cap Screw(杯头内六角螺丝)M2.5x8 CNM2.5X8CS...
  • Page 31 INSTALLING TAILBOOM ASSEMBLY Radikal N640 Description Part # CNM3x8BHCS CNM3x8BHCS Button Head Cap Screw( 圆头内六角螺丝)M3x8 M3X30CS CNM3X30CS M3x30 Cap Screws( 杯头螺丝) HW6202BS Aluminum Post( 铝柱) M3 CNM3LOCK M3 Locknut(M3 螺母) CNM3LOCK Page 31...
  • Page 32 Radikal N640 MOUNTING MUFFLER BAG 3 INCLUDED INCLUDED Description Part # CNM3x35CS Speed Torpedo HV2 Muffler( 排气管) CN3038B CNM3X35CS M3x35 Cap Screws( 杯头螺丝) Page 32...
  • Page 33 Radikal N640 FUEL TUBE ROUTING BAG 2 Description Part # CNA1003 Fuel Tubing( 气压管) Fuel Filter(滤油器) NOT INCLUDED NOT INCLUDED Fuel Tubing(油管) Page 33...
  • Page 34 ELECTRONICS MOUNTING Radikal N640 INCLUDED Description Part # NOT INCLUDED Gyro(佗螺仪) NOT INCLUDED Gyro Isolation Foam( 防震垫片) NOT INCLUDED Receiver Battery( 电池) Hook & Loop Strap(束带) NOT INCLUDED Receiver(接收机) NOT INCLUDED Page 34...
  • Page 35 CANOPY Radikal N640 BAG 2 Due to each canopy being handmade, there may be small variances in fitment. If the canopy does not fit exactly, do not force the fitment of the canopy onto the frames. Check where the canopy could be hit-...
  • Page 36 Description Part # CNM4X27SCS Cap Screw(杯头内六角螺丝 )M4X27 CNM4LOCK NOT INCLUDED Rotorblades( 螺旋桨) CNM4LOCK M4 Locknut(M4 螺母) Congratulations on finishing the build of the Radikal N640 helicopter. Please follow your instruction manuals on setting up your transmitter and electronics. Page 36...
  • Page 37 PERSONAL BUILD NOTES Radikal N640 Page 37...
  • Page 38 PERSONAL BUILD NOTES Radikal N640 Page 38...
  • Page 39 PERSONAL BUILD NOTES Radikal N640 Page 39...
  • Page 40 1740-C Junction Ave. San Jose, CA. 95112 U.S.A. www.centuryheli.com...

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