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Predator NX Gas
& Gas SE
 MAIN BLADES
 MAIN ROTOR SPAN
 TAIL ROTOR SPAN
 OVERALL LENGTH
 HEIGHT
 ENGINE
Century Helicopter Products
SPECIFICATIONS
Designed and Developed in USA
4th Edition, Copyright September 2007. All rights reserved.
Instruction
Manual
Gas
Gas SE
710mm
700mm
62.2 in
61.4 in
10.5 in
11.2 in
56.9 in
56.9 in
18 in
18 in
Z231H
Z260H

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Summary of Contents for Predator NX Gas

  • Page 1 Predator NX Gas & Gas SE Instruction Manual SPECIFICATIONS Gas SE  MAIN BLADES 710mm 700mm  MAIN ROTOR SPAN 62.2 in 61.4 in  TAIL ROTOR SPAN 10.5 in 11.2 in  OVERALL LENGTH 56.9 in 56.9 in  HEIGHT 18 in 18 in ...
  • Page 2 Compared to other 60 class models, pilots will be elated to find the Predator Gas is easy to build. This kit will exceed your expectations for precision control at an affordable price.
  • Page 3 Predator Gas & Gas SE Construction Manual This manual has been written for both the Predator Gas, CN1303 & Predator Gas SE, CN1304 se- ries of helicopter kits. The manual follows a step by step approach to building the helicopter with highlight labeling for components that are included in the Gas SE only.
  • Page 4 Step 1 Rotor Head Block #HI6181A Head Dampers Stan- The entire rotor head comes pre-assembled dard (Red) x 2 with the standard HI6181A (red) head dampers Sport & Scale Flying installed. 3D and aerobatic pilots should disas- semble the rotorhead and install the hard HI6181B #HI6181B (black) head dampers.
  • Page 5 Step 4 Bell Mixer #HW6205 #CNLR1014 M3x5x3 Steel Short Ball Spacer x 2 Press one M3x7 flanged ball bearing into one side followed by one M3x5 spacer and #HI6189 another flanged bearing from the opposite Bell Mixing side. If the bearing is tight, lightly sand the bell mixer and use L262 Red threadlock #CNBB37F to bond the bearing in place.
  • Page 6 Round Recess Step 7 Feathering Spindle & Blade Grip on Top #HW6180A M5x10 Socket Screw & M5 #HW6180A #HW6182 Flat Washer Feathering Hobby Grease Stiffness Spindle Shims Generally, grease is needed for thrust Large bearings and the tail rotor gears. A light Lithium or Silicon grease should be used, commonly...
  • Page 7 Step 9 Flybar & Flybar Paddles M4x5 Set Screw Note: Bell Mixer positioned on leading edge as head rotates clockwise. #HW6173 Flybar 520mm *packed with tailboom. Pushrod B 26mm (center to center) HI6179B 30gr Sport Black Gas #HI6145 Short Ball Link x 2 M3x12 Button #HW6192 14mm Pushrod x 2 Head Screw...
  • Page 8 Step 11 Gas Engine Preparation Remove and keep the four M4x14 Phillips head screws to remove the pull start unit from the factory mount plate. Similarly remove the factory pull start plate and also keep the M5x14 flat head screws. The screw will be reused to mount the engine and pull start unit to the helicopter.
  • Page 9 Step 16a Engine Stabilization System CN2300 Increases rigidity of the main frame of all Predator Gassers to enable you to perform hard maneuvers with more ease. Install as shown in these photos. You will need to dremel the fan shroud where the E.S.S.
  • Page 10 M6x15 Socket Cap Step 17 Engine Cooling Fan Bolt & M6x13 Flat Washer #HW6012HDV2 Slide the cooling fan assembly onto the engine. Locate the M6x15 socket cap screw and M6x13 flat washer Fan Hub and thoroughly clean these parts to remove any oil 5.0mm Hex residue.
  • Page 11 Step 20 Rear & X Frame Assembly #HW6117A Rear X Frame Align the rear X frame with the left side of the rear #HW6115C lower frame (notice the spark plug access holes Rear Lower align) for the spark plug wire. Insert one M3x8 Frames - Left socket cap screw from the outside of the lower Side...
  • Page 12 Step 23 Servo & Front Lower Frame - Left Side #HW6112 Servo Side The fuel tank isolators are a “U” profile that need to be fitted M3x10x8 Short Frame to the fuel tank openings on the lower front side frames. Start Frame Spacers x 2 at the center of one edge and work the isolator into the frame, M3 Locknut...
  • Page 13 Step 26 Right Front Lower Frames M3x10x8 Short Starting from the right side of the battery tray, slide Frame Spacers x 2 the matching servo frame in place first followed by two M3x10x8 spacers. Install the fuel tank with the opening on the left side (the tank only fits one way) and slide the front lower side frame over the exposed M3 Locknut...
  • Page 14 #HW6045HD Step 29 Clutch Bell & Short Bearing Block Pre-Assembled Lower Short Bear- As the 15T pinion has a larger diameter than the top sur- ing Block face of the clutchbell, it must be removed before the clutch #HW6013HD bearing is changed or installed. The pinion has a standard Clutch Bell As- right hand thread, if available use strap-wrenches, grip the sembly 15T...
  • Page 15 CCPM (cyclic collective pitch mixing) requires that the three servos that drive the swashplate be the same model and more importantly the same speed and torque rating. Digital and analog servos will fly the Predator with ease as long as the minimum torque rating selected is 70oz/in, rated at 4.8 volts.
  • Page 16 Step 35 Upper Frame Assembly #HI6032 Rear M3x8 Socket Cap CCPM Lever Screws x 4 & M3 Start by installing the elevator bell crank Flat Washers x 4 assembly, note that the left side ball bear- ing is flush with the pivot axle. On the right side frame, the axle extends outward (No threadlock!) from the frame to attach the elevator arm.
  • Page 17 Step 37 Rear CCPM Arm Align and press the rear ccpm arm onto the exposed axle with the arm M3x10 Button pointing to the bottom of the upper Head Screw side frames. This is a tight fit, light tapping with a plastic hammer will help here.
  • Page 18 Step 39 Auto Hub Spacer Step 40 Main Gear Pin #HW6001 M3x15 Steel Pin & M4x4 Set Screws x 2 Do not remove the two set screws that are already installed in the top auto hub, these are factory installed. #HW6054 Mark the set screws that M10x14x3.5 Spacer...
  • Page 19 Step 45 Starting Shaft and Hex Coupler The gas kits include the regular starting shaft and hex coupler as in all the Predator kits to align the clutch to the clutchbell. Clean both the starting shaft and the inside race of the bearing inside the clutchbell and the inside race of the top starting shaft bearing.
  • Page 20 Step 46 Main Gear & Clutchbell Gear Mesh Loosen the eight M3x8 socket cap screws M3x8 that hold the clutchbell assembly and the Socket Cap two M3x12 socket cap screws between the Screws x 8 upper and lower bearing block assemblies. &...
  • Page 21 Step 49 Upper and Lower Frame Assembly Position the upper and lower frame assemblies, aligning the starter shaft in the clutch bell to the torrington bearing in the clutch. While holding this in place, insert the M3x25 socket cap screws on both sides through the servo frames, position the 14mm standoffs and thread into the 26mm round threaded spacer into the forwardmost hole.
  • Page 22 #HW6146B Step 51 Swashplate 120 Degree Starting with the inside race, apply L242 Swashplate Blue threadlock to the two long silver steel Assembly balls and attach them across from each other. The balls need to be started by hand at one of the holes in the outer swashplate #CNLR1014 rim and then tightened with an M2.0 hex Short Steel...
  • Page 23 Step 54 CCPM Radio Review and Setup The next section covers setting the pushrods and servos that will control the helicopter. It is important at this time that you review the instructions provided with your radio that control the ccpm mixing for the 3 cyclic servos. Reviewing the radio instructions will assist you in becoming familiar with the functions that affect the individual servos and affect the interaction of the three servos working together to control the swashplate.
  • Page 24 Step 56 Idle Adjustment Screw & Carburetor Spring The idle adjustment screw is used to limit the travel of the throttle valve inside the carburetor. Turn the adjustment screw until the point is flush to the bottom of the rotary lever, this will be the throttle stop position.
  • Page 25 This is the recom- mended setup to get top performance out of your gas powered Predator. In the closed position it will be difficult The ball for the throttle lever must be to reach the set screw for the throttle arm.
  • Page 26 Step 58A Radio Switch Mount M2.3x12 Self Step 59 Upper Rotorhead Pushrods Tap Screws x 4 & #HI3205 Servo Mount Tabs x 2 Attach pushrod A to the washout control arms and pushrod C from the single side of the bell mixer down #CN2290 the to the long ball on the inner race of the swashplate, Switch Mount...
  • Page 27 Step 60 Landing Gear Assembly #HI6122 Landing Gear Plastic Struts x 2 Assemble the metal landing skids onto the plastic struts, noting that the correct direction is to have the struts ~ 1 1/2” sweep forward. Position the rear strut [37mm] at 37mm from the end of the skid and M3x5 Set Screws x 4...
  • Page 28 #HW6063BS Stain- Step 63 Tail Boom and Torque Drive Shaft less Steel Torque The tail transmission and tail gear box have the same circular Drive Shaft mounts that engage the tail boom and lock it in position. Apply #HI6060 26mm a few drops of light oil (Triflow) to both bearings on assembled Threaded Hex torque drive shaft and apply a small amount of liquid soap to the...
  • Page 29 Step 66 Tail Gear Mesh #CNBB513 M5x13 #HI6078A Tail Ball Bearing Gearbox Set Apply a small amount of L262 Red threadlock to the shaft ahead of the spacer on the tail output shaft and slide one M5x13 bearing against the spacer. Remove the tail input shaft and position both the input and output shafts into the right side of the tail gearbox.
  • Page 30 Step 69 Tail Bellcrank #HW6001 M3x14 #HI3087A Pitch Special Shoulder Plate Assembly Press one M3x7 flange bearing into Screw one side of the tail bellcrank, followed #CNBB37F M3x7 by one M3x5x3 spacer and the second Flange Bearing x 2 M3x7 flange bearing from the other side. Slide the assembled pitch plate onto the #HI6102 M3x5x2 #CNLR1020...
  • Page 31 Step 72 Carbon Tail Rotor Blades - Gas SE #HW6204 #HI6099A 95mm M3x10x1.5 Tail Rotor Blades x 2 The carbon tail rotor blades will not fit the tail rotor Spacers x 4 grips without trimming the ends. Attach the two rotor blades together and grind 3-4mm off the end of both blades as shown.
  • Page 32 Step 75 Tail Bevel Gear Mesh M3x5 Set Screw Now that the tail transmission is in place the tail bevel gear mesh must be set. Rotate the tail transmission shaft until the flat spot is visible through the hole in the bevel gear. Apply L242 Blue threadlock to the M3x5 set screw and insert into the bevel gear.
  • Page 33 Step 78 Carbon Tail Support Struts - Gas SE #HW6202A Carbon Support Gas SE only Struts x 2 & End Fittings x 4 Insert and mark the position where the machined end fit- tings overlap the ends of carbon struts. Remove and sand through the glossy surface up to the marked position and ensure that the fittings will easily slide over the tubes.
  • Page 34 Step 81 Tail Support Struts Insert one M3x12 socket cap screw through the strut fitting (carbon or aluminum), one M3x9x3 plastic spacer, through the mount hole in the rear side frame M3x9x2 and secure with one M3 locknut. Repeat for the other Spacer x 2 side.
  • Page 35 Step 84 Tail Pushrod Guides #HI6106 Cable Ties x 2 Once the pushrod has cured, the servo position can be fine tuned by moving the servo mount, generally position the pitch plate assembly centered between the tail hub and the tail gearbox. The instructions included with the gyro will have specific instructions for the tail setup.
  • Page 36 Step 87 Windshield Leave the protective plastic sheet on the wind- shield while the rough cut is made, leaving 3mm [1/8”] of extra material beyond the molded line in the windshield. Use a black marker if necessary to trace the line to see it clearly while cutting. Con- tinue trimming and cutting the windshield until it will fit into the matching recess in the canopy.
  • Page 37 Step 91 Windshield Wooden Blocks Using Epoxy, bond one wooden block from the inside of the canopy, centered over each hole for the windshield screws. Each block should be flush or slightly below the edge of the canopy. Let the Epoxy completely cure. Using the 2.3mm [0.090”] drill bit, redrill the holes through the wooden blocks.
  • Page 38 MAIN BLADE WASHERS (4) HI6131A PREDATOR GAS DECAL HW6204 TAIL BLADE WASHERS (4) HI6132A INSTRUCTION MANUAL - PREDATOR GAS & GAS SE HW6205 M3X5X3 STEEL SPACER (4) - BELLCRANKS HI6133 WINDSHIELD ONLY (for HI6130) HW6206 M3X5X2 STEEL SPACER (4) - TAIL BELLCRANK HI6138 FUEL TANK w/FUEL FITTINGS &...

This manual is also suitable for:

Gas se