Robinson 22HP Helicopter Instruction Manual Pho to s ho ws opt ion al a cc esso ries inst alle d. FEATURES F F F F F F F F GELCOAT FIBERGLASS FINISH CRYSTAL CLEAR WINDSHIELD SCALE WIRE LANDING GEAR SCALE ELEVATED TAIL BOOM ENGINE SIZE MAIN ROTOR DIAMETER HEIGHT LENGTH .50 58” 19” 47” Century Helicopter Products Designed and Developed in USA 1st Edition June, 2003 All rights reserved.
Building Instructions for: CN1076 Robinson 22HP ARF 50 size Helicopter Introduction Congratulations on your purchase of Century Helicopter Product's scale RC Robinson R22HP helicopter model. Our helicopters that are simpler to build, easier to see and look fantastic. Whether you are just beginning in helicopters, wanting to start in scale or an accomplished pilot, Century offers a wide selection of helicopters to fulfill your dreams in scale.
Robinson 22HP Construction Manual This manual has been written for Century’s 50 size Robinson 22HP scale helicopter. This manual should be reviewed before starting the assembly as there are a few complicated sections to attach the various fiberglass components to the mechanics. Instructional Detail Every attempt has been made to ease the assembly of your helicopter, at each step where there are complex assemblies, there are detailed drawings, photos and written instructions to walk you through each step.
#HI3181 Damper Rubber x 2 Step 1 Rotor Head Block Press in the Damper Rubbers Head Block. Apply Triflow oil or similar teflon oil to the inside of the dampers. Dampers should be replaced on a yearly basis. Step 2 Seesaw Assembly Insert one ball bearing into each bearing cup and insert into the offset plate. Apply one small drop of medium CA glue to the back side of the bearing cup to secure to the offset plate. Insert one ball bearing into each tie bar.
Step 3 Main Rotor Grip Assembly Insert the slide tube into the bell mixer arm from the offset side, through the oilite bearings (installed already) and secure onto the blade grip with one M3x16 Socket Cap screw and M3x7 Flat washer. Install one long ball and one short ball (Tip 2) into the Bell Mixer. File the bolt flush to the inside of the blade grip mount. Install two M6x13 Ball Bearings into both ends of the blade grip assembly. Complete the second blade grip in exactly the same way.
#HI3176C Flybar Control Arm x 2 Double Studded Ball x 2 Tapered Standoff x 2 Step 5 Flybar Control Yoke Assembly Using an available M3x12 Button Head Screw, insert approximately half the length of the screw to form threads into the smaller, tapered ends of the control arms and the control arm stand-offs.
Step 7 Washout Assembly Robinison 22HP Manual Attach two Medium Balls (Tip 2) to the Washout Mixing Arms ( note they are attached from the flat side of the arm). Using one slide tube inserted from the flat side, secured using one M3x16 Button Head Screw and one 3x7mm Flat Washer per arm. Do not overtighten the arm as it is threaded into the plastic washout base. Also note, the screw is attached on the left when installed later on the main shaft.
Step 9 Starting Shaft Bearing Blocks The Start Shaft Guide Blocks are preassembled. Slide the Starter Shaft through one of the block assemblies with the M5x11 Ball Bearing facing up then slide the M5 Flat Washer, spring and finally the M5x10 Collar.
Step 11 Counter Gear Assembly Robinison 22HP Manual Assemble the engine counter gear assembly, start by pressing the guide pin into the hole in the end of the Drive Shaft. Insert the shaft through the Counter Gear ( make sure the pin is fully seated in the recessed side of the gear ) then slide the two M5x13 Ball Bearings.
STEP 12 Main Gear & Shaft Assembly The Main Gear is pre-assembled with the AutoRotation Bearing installed. Insert the bottom end of the main shaft through the auto rotation gear assembly, align the holes and secure the Main Shaft using one M3x16 Socket Cap Screw and one M3 Locknut. #CN1076-16 Main Shaft You can temporarily insert main shaft, main shaft bearing spacer & bearing, stopper and head block screw to keep them from getting lost! * Do not apply threadlock here.
Step 14 Upper Side Frames Robinison 22HP Manual Install two 4x4mm Set Screws (do not apply locktight at this time) in the Mast Stopper (note the raised inner diameter must face the ball bearing) and slide the mast stopper on the main shaft followed by one M10x19 Ball Bearing and one M14x19 Spacer (the spacer must be installed on top of the bearing). Slide one M8x19 Ball Bearing onto the bottom of the main shaft.
Step 15 Upper Frame Assembly & Front CCPM Servo Mounts Insert two long hex spacers at the specified locations in the diagram, note that the front hex spacer is installed into the forward-most hole. Attach the left side CCPM Servo Mount using four M3x12 Self Tapping Screws (Tip3) into the starting shaft blocks.
Step 17 Front CCPM Servo Mounts Robinison 22HP Manual Install both CCPM front servos at this time, with the output shaft of the servos positioned upwards and the servo flange inserted from behind the servo mount. Using the screws provided, insert the screws from the servo top through the grommets (insert the eyelets between the grommet and the mount bracket) and attach the servo mount tabs from the bottom of the servo.
Step 20 Clutch, Fan & Engine Mounting Engine Nut Thrust Washer or M9x14 FW Engine ball bearing exposed. M5x13 Flat Washer #HI3009 Cooling Fan #HW3011 Clutch Shoes #CNBB1812 M12 x 18 Ball Bearing x 2 Pre-Assembled in kit. Remove all parts from the engine crankshaft until you can see the front ball bearing, install the 9x14mm Flat washer (or washer provided by engine manufacturer), insert the Ball Bearings into the clutch bell assembly and place on the crankshaft.
Step 22 Fuel Tank Assembly Robinison 22HP Manual Insert the two pieces of aluminum tubing through the large cap, rubber stopper and small cap, bend the long aluminum tube upwards and attach the short piece of fuel line and clunk to the short straight piece of tubing. Test fit the assembly into the Fuel Tank and make sure that the clunk reaches the end but moves freely and the vent tube is near the top of the tank but does not touch. Finally tighten the long self tapping screw to seal the tank.
Step 24 Tail Output Shaft Assembly Notice that the tail rotor output drive shaft has 2 holes, one through the shaft and one drilled partially into the shaft. Slide the small bevel gear (A) with the teeth facing the shaft from the end with the through hole and position the gear aligning the holes. Press the M2x12 steel pin through and secure with one M3x4 Set Screw (Tip 1) inserted from the end of the shaft using threadlock. Slide the Spacer Tube onto the shaft and position against the gear.
Step 27 Tail Gearbox Assembly Robinison 22HP Manual Tail Pitch Plate Assembly Slide two Ball Bearings on each side of the tail rotor output shaft assembly and insert through the right side of the Tail Rotor Gearbox Housing, make sure the bearing is fully seated into the recess. Slide the tail rotor pitch plate assembly on the shaft.
Step 29 Tail Blade Assembly M3 Locknut x 2 Snap the ball on the tail rotor grip into the adjoining pitch slider link on both sides. Install the tail rotor blades shimmed with M3x10 plastic washers on both sides using two M3x20 socket cap screws and M3 locknuts. Note the direction of the blades on the diagram, the leading straight edge of the blade should be on the same side as the ball on the blade grip.
Robinison 22HP Manual Step 32 Tail Gearbox Assembly Attach the tail input gear assembly on to the drive shaft with two M4x4 set screws (Tip 1 - make sure the flat spot is aligned with one of the set screws and only use ONLY blue locktite here) apply red locktite to the drive shaft end and insert into the gearbox input shaft. Warning, do not use red locktite on ANY other screws because it is permanently bonded in place.
Step 33 CCPM Radio Review & 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 controls 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. Radio Setup Procedure 1.
Step 35 Pushrod Setup and Adjustments Robinison 22HP Manual Make up all the control pushrods according to the specified lengths shown in the table. Please note that the dimensions listed are from center to center of the ball ends (this has changed from earlier manuals). Depending on the servo brand, the servo horn offers different patterns for fine tuning. Beginners should follow the setup steps and pitch curves for Hovering in the final adjustments.
Step 36 Rotorhead Pushrod Attachment After completing the pushrods, attach the pushrods to the rotor head without the cabin or shroud installed on the helicopter mechanics. At this point the helicopter should be setup, ready to fly, except for the tail rotor and throttle linkages before the fiberglass cabin and tail boom are installed. Beginners should follow the setup steps and pitch curves for Hovering in the final adjustments.
Servo Setup & Adjustments Robinison 22HP Manual Over the next few pages the pushrod hardware will be mounted to the servos horns and ultimately the pushrods themselves. Each step is well described but lets take a few moments to cover a few basic points on setting up individual servos. By this time the radio will have been charged overnight. Recheck that all the servo trims are centered.
Step 37 CCPM Swashplate Linkage Three servos are mounted on the front and rear servo brackets. They work together to tilt the swashplate producing the collective pitch, roll cyclic pitch (aileron control) and the fore-aft cyclic pitch (elevator control). The servo horns provided in the radio will not be long enough to achieve the full collective range, the control ball is required to be mounted at a distance of 25-26mm from the center of the servo.
Step 38 Rudder Linkage Robinison 22HP Manual The Rudder linkage changes the pitch of the tail rotor blades to increase or decrease the torque compensation to rotate the nose of the helicopter about the main shaft. Use a servo horn in the shape of a cross and find the correct arm that will sit at 90 degrees to the length of the servo by lightly pressing the servo horn over the output shaft on the servo.
Step 39 Throttle Linkage Attach the throttle mount to the left side of the front mechanics with the knotch towards the starting shaft using two M3x10 socket cap screws in the front, threaded into one M3x30 hex spacer and one M3x8 socket cap screw and M3 locknut on the inside of the frames. Attach one steel ball and one 2mm nut, to both the throttle arm and servo horn using threadlock. Position the ball at 13.5mm from the center of the servo and in the outermost hole on the plastic carburetor arm.
Step 40 Muffler Attachment Robinison 22HP Manual With the narrow space between the mechanics and the fuselage, it is recommended to install the scale muffler Century has designed for scale fuselages. Attach the muffler to the engine with the screws provided with the muffler (Tip 1- using hi-temp threadlock). Attach the pressure tap to the top of the muffler, remember to use hi-temp RTV sealer or threadlock on these parts. Route the return fuel line below the engine.
STEP 42 Tail Pushrod Guide Positioning Insert three rudder pushrod guides positioned 7 3/4”, 14” and 21” from the front of the tail boom. Do not bond them at this time until the tail boom has been test fitted with the fiberglass tail boom. Connect the long rudder pushrod to the pushrod coupler and attach the 104mm pushrod. Note, the long pushrod uses the Grey colored 2.0mm ball link but the 104mm pushrod uses the Black 2.2mm ball link.
Robinison 22HP Manual Step 44 Preparing and painting the kit version. This section is written to cover painting and detailing of fiberglass components using in Century’s scale helicopter kits. Some included references may describe components of different kits, not exclusive to this instruction manual. Flexibility A wonderful attribute of fiberglass is in its flexibility. Century takes care and pride in craftsmanship that goes into every fuselage.
3. Once the detail parts have been built into the sub assemblies are ready to paint, use a filler in sections that have gaps or slight surface imperfections, occasionally there are voids (air bubbles in the resin) that occur near the surface that need to be filled. There are allot of good fiberglass fillers on the market, it is best to check with your local hobby shop to get a recommended product.
R22 Fiberglass Components Robinison 22HP Manual At this point, the flying mechanics should be assembled flight ready and possibly flight tested. The remaining items to be checked before proceding is the collective pitch setup and double check the servo throws for any binding. Now is the time to finalize the setup because access to the rotorhead is very restricted after the complete cabin and top shroud are assembled.
STEP 47 Cutout Window & Navigation Lights Mark a line 3/16”[4mm] outside the molded line and cut out the parts from the plastic sheet. Carefully continue to trim the parts as you test fit them to their final positions. #CN1076-2 Top window & Nav lights STEP 48 Top Window After test fitting the top window, make sure that enough material has been trimmed away to clear the top shroud opening. Apply “goop” to the outside edge of the window and clamp in place until it is completely dry. Top window fitted.
STEP 51 Cutout Window & Navigation Lights Robinison 22HP Manual #CN1076-2 Navigation Lights Taking the navigation lights, continue trimming as they are fitted to the front of molded lights on the main cabin. Once trimmed, paint the navigation lights from the inside to preserve the high gloss outside surface. General aviation: red on the left and green on the right. Bond in place using “goop” adhesive applied to the edge of the lenses.
STEP 54 Front Landing Gear Mounts #CN1076-10 Assembled #CN1076-20 Landing Gear M3x9x4 Plastic M3 Locknut x 2 Spacer x 2 Rubber M3x7 Flat Insulator x 2 Washer x 2 Slide one M3x9 plastic spacer onto the front landing gear stud followed by one M3x7 flat washer (additional washers may be necessary to lift the engine head from touching the landing gear), then the main mechanics and one M3 locknut and leave loose for now.
STEP 57 Top Shroud Installation Robinison 22HP Manual Before the cabin can be installed the top shroud needs to be fitted. Remove the rotor head assembly and insert through the finished fiberglass shroud. Ensure that the washout arm pushrods are connected to the “A” pushrods and that the longer “C” pushrods are attached to the short steel balls on the bell mixer. Holding the shroud against the rotor head, insert the main shaft into the upper bearing and slide into position.
STEP 59 Receiver & Rx Battery Mounting #CN1076A Scale Accessory Kit (not included) The receiver and the receiver battery pack should be mounted in the bottom of cabin all the way in the front to balance the helicopter. Underneath the scale instrument panel (if purchased separately.
STEP 61 Tail Gearbox Assembly Robinison 22HP Manual Position the output gear assembly into the right gear box half (insure the 2 bevel gears are meshed properly and the ball bearings are fully seated in their recesses) and liberally greased the gears before closing the gear box. Position the gear box halves over the holes in the end of the tail boom and secure with one M3x10 Socket Screw and M3 Locknut at the end of the gear box and one M3x16 Socket Screw and M3 Locknut at the center-top location.
STEP 63 Scale Engine Exhaust (Optional Scale Accessory Kit) CN1076A Scale Accessory Kit (not included) If the optional accessory kit has been purchased the scale engine exhaust needs to be fitted before the cabin can be installed on the mechanics. Start by attaching the spring to the top surface of the engine exhaust. Using pliers, hold both the pin with the spring centered and apply a full drop of Epoxy to each end of the pin and carefully insert into the hole in the top of the shroud.
Robinison 22HP Manual STEP 66 Attaching the Tail Boom Assembly Once the foam insert is modified in the last step it can be positioned inside the fiberglass tail boom. Simply press the insert into the tail boom until it stops. The rudder pushrod is inserted into the smaller hole to the right of the central cutout. Mount the completed tail boom to the mechanics and make sure the navigation light is centered along the centerline of the main shaft.
Final Adjustments - Radio Setup Now that the servo installation into the helicopter is finished the following pages should be reviewed. As various types of radios can be used to setup the helicopter, some of the following information may not apply. Servo Direction (Servo Reversing) Pitch & Throttle Curve Adjustments Check that all servos move in the correct directions, see pages 23-26.
Before Flying your Helicopter Robinison 22HP Manual Before each flight, check that all bolts and screws are tight. Simply flying your helicopter, will loosen any screws which are not threadlocked or secured with a lock nut. First Flights For the beginner pilot, a training pod is strongly recommended to assist in learining to hover the helicopter with substantially reduced risk of crashing.
Tail Rotor Setup (rate gyro) What separates airplane radio equipment from the helicopter version is in the control of the individual curves discussed earlier and in the Revo-mixing1. Take a moment to consider the helicopter hovering in front of you. 1 Nose rotates left at hover. Problem: Not enough pitch in tail rotor to match torque setting of engine. Action: Increase pitch by lengthening2 the rudder pushrod.
Basic Hovering Robinison 22HP Manual When all is set, ready and checked, attach your training gear/pod and start the engine. (1) Place the helicopter pointing into the wind and stand behind the model about 15' away. (2) Always watch the nose of the helicopter, move the rudder left and the nose will move left. (3) Start by increasing the throttle slowly until the helicopter rises 2-6 inches off the ground then set it back down.
Robinson 22HP Replacement Parts HW3000 HW3005A HI3007 HI3009 HI3010A HI3010B HW3011 HW3018A HI3020A HI3040 HW3042 HW3054A HI3056 HW3057 HW3059A HW3062A HW3063A HW3070 HW3073 HW3074 HI3075 HI3078 HI3087A HI3089 HI3096A HW3098A HI6099 HI3102A HI3106A HI3107 HI3107A HW3112D HW3115B HW3116A HW3127 HI3138A HI3145 HI3146C HI3152C HI3152A HI3154 HI3167B HI3167E HI3167F HI3167G HW3173A HI3176C HI3179A HW3180A HI3181 HI3184 HI3189 HW3192A HI3205 HI3206 Hardware Pack Hardened Start Shaft Assembly Starter Shaft Beari
