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[1]The engine will not start.

* The engine starting shaft will not turn:
The engine may be flooded with too much fuel. Please remove the glow plug first, then turn the engine
with the electric starter until the excess fuel spits out of the glow plug hole.

* The engine turns when the electric starter is applied, but the engine will not start:
(1) Is the glow plug working? Remove the glow plug and does the platinum coil glow red when a 1.5

volt battery is applied to the plug? The glow plug battery may be weak and old.

(2) Is the carburetor needle properly set? Please refer to the engine instruction manual for the proper

needle setting.

(3) Does the throttle control arm move properly and in the correct direction according to your transmitter

command?

* Engine will start, but quits immediately.
(1) Use the transmitter to increase the throttle carburetor slightly.
(2) Try a new or different type of glow plug. There are different types of glow plugs on the market for

different types of fuel and operating conditions. Seek the advice of experienced fliers and also
experiment with different types of glow plugs until you find the one that suits your operating condition
the best.

*Engine runs, but the helicopter will not lift off.
(1) Check the main rotor blade pitch angle, they should be set at 5.5 to 6 degrees when the transmitter

throttle/collective stick is at the center position.

(2) Does the engine throttle arm move properly? The carburetor opening should be fully open when

the transmitter throttle/collective stick is moved up. The carburetor opening should be nearly closed
when the transmitter throttle/collective stick is moved down. And the opening should be completely
closed when the transmitter throttle/collective stick is moved down and the throttle trim is also moved
down.

(3) The carburetor needle is not set properly. Close the needle (turn it clockwise) all the way, then

open the needle (turn it counter clockwise) 1 and 1/2 turns and try again. If the model still will not
lift, then the engine maybe running too rich. The symptom is the engine exhaust has a lot of smoke
and the engine coughs and wants to quit when the transmitter throttle/collective stick is moved up,

then close the needle 1/8 turn at a time, until the model will lift off. Do not turn the needle too far

inward, that will make the engine run too lean and over-heat and damage the engine.

[2] Helicopter problems.

* The helicopter shakes.
(1) Is the blade spindle bent?
(2) Is the flybar bent?
(3) Is the main rotor shaft bent?
(4) Are the two control paddles mounted at the same distance from the rotor shaft, and the paddles

are parallel to each other, and in the proper direction?

(5) Is the tail rotor shaft bent? The tail rotor blades mounted properly or damaged?
(6) Are the main rotor blades damaged or mounted in the proper orientation? The blade may require

additional balancing. The blade balance can be checked by removing both blades and then use
one of the 5mm blade bolt and nut to hold the two blades together like a teeter totter. Then, hold
the blade bolt with your thumb and index finger. The two blades should teeter and remain in a
level position. If not, then add some tape to the lighter blade near the blade tip until the two blades
teeter in a level position. Hobby shops also sell blade balancers that are designed solely for balancing
model helicopter blades.

The model helicopter should be thoroughly inspected after each flying session.
(1) Check every screw and bolt to make sure none has loosened due to vibration.
(2) Check every rotating and movable part to ensure they still move smoothly and normally.
(3) Clean off the exhaust residue from the muffler, engine, and helicopter.
(4) Check all movable parts, such as gears, ball links, belt, etc. for unusual wear.

Trouble Shooting

After Flight Checklist

Summary of Contents for RAPTOR 90 CLASS RC HELI

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Page 7: ...6 WARNING WARNING WARNING WARNING BUILDING HINT ...

Page 8: ...ly open up the bag that you need for the particular assembly Check the parts in that bag against the parts list shown for each assembly as well as each sub assembly to make sure there are no missing parts To prevent losing small hardware please empty the small nuts and bolts and parts into small plastic trays on your work table At the end of each major assembly there should be no left over parts ...

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Page 14: ...lf Tapping Screw 6 3 1 3 Main Frame Assembly 1 Installation of Servo Frame 1 4 1 2 3 BAG C Install the one piece servo frame using six self tapping screws Do not use Loctite when attaching self tapping screws to plastic parts Loctite is only for threading metal into metal parts ...

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Page 16: ...3 BRG 2 3 BK0340 Aileron Control Arm 1 4 BK0075 Link Ball 4 8 2 No Material No Description Qty 1 HMJ2 10N M2x10 Self Tapping Screw 1 2 BK0337 Elevator Arm Parallel Lever 1 3 BK0075 Link Ball 4 8 1 No Material No Description Qty 1 HMJ2 14N M2x14 Self Tapping Screw 1 2 HMV840ZZ d4xD8x3 BRG 2 3 BK0338 Elevator Control Lever 1 4 BK0075 Link Ball 4 8 2 L R Add a tiny drop of thick CA glue at the tip of...

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Page 20: ...19 ROTOR HEAD ASSEMBLY 2 ...

Page 21: ...ssembly 2 1 BAG F Make two pushrods for controlling blade pitch The distance of 43 mm is measured between the center of two pushrod holes Attach the Seesaw Hub of the Control Paddle Assembly to the Main Rotor Head with No 2 Socket Screws No 3 Bearing Please add a small drop of Loctite along the entire length of the M3x10 Socket Screw No 2 and on the outside of the collar d3xD4x5 5 No 4 Link the pu...

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Page 24: ...23 TAIL ASSEMBLY 3 ...

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Page 32: ...K0087 d3xD8x1 4 Washer 2 6 3 1 Tail Assembly 1 7 4 3 1 Tail Support Subassembly 2 No Material No Description Qty 1 HMM3B M3 Locknut 4 2 HSE3 12B M3x12 Self Tapping Screw 2 3 HMC3 20B M3x20 Socket Screw 2 4 HMC3 25B M3x25 Socket Screw 4 ...

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Page 34: ...3x55 Link Rod 2 4 BK0438 2 3x88 Link Rod 1 5 HSE2614N 2 6x14 Self Tapping Screw 12 6 HME4 5B M4x5 Set Screw 2 No Material No Description Qty 7 Servo 5 8 BK0105 Rod Joint 1 9 BK0347 Tail Control Rod A In BAG O 1 10 BK0075 Link Ball 4 8 4 11 BK0086 Ball Link 4 8x20 7 12 BK0104 Servo Mounting Plate 6 ...

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Page 39: ...38 SETTINGS 6 ...

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Page 44: ...osition before starting the engine Make sure the transmitter and receiver are turned on before starting the engine Always maintain a safe distance when operating a model helicopter Do not fly a model helicopter above people or cars Flying requires concentration Operating a model helicopter for extended time can cause fatigue Please rest in between flights Do not touch the engine or muffler immedia...

Page 45: ...ore flight Range check the radio 8 The engine carburetor must be in the idle position before starting the engine Please read the engine instruction manual on how to properly adjust the engine Set the carburetor main needle according to the engine instruction Depends on the fuel and glow plug used the carburetor idle screw may require fine adjustment of 1 4 to 1 2 turns away from the factory settin...

Page 46: ...lade tips should follow the same path as they rotate then it s ok 3 When two blades are in track the blade tips will appear overlapped as one look at the rotor tip path plane from the edge If the blades are out of track then adjust one of the pushrods that connects to the main rotor blade pitch arm Redo steps 1 to 3 until the blades are tracking properly In hover the main blades should be around 5...

Page 47: ...m your helicopter 1 If the helicopter nose starts to yaw left or right then use the transmitter trim to compensate 3 If the helicopter noses down or up then yaw right yaw left A situation move to b B situation move to a 2 If the helicopter rolls to left or right then rolls right rolls left C situation move to d d situation move to c Noses down Noses up E situation move to f F situation move to e ...

Page 48: ...ficult to control the model to prevent it from moving For a beginner it will also be difficult to determine whether the helicopter is in trim or not But with repeated practice close to the ground you will develop a feel for the controls It is recommended to let a more experienced model helicopter pilot trim out your new model before you attempt to learn to hover 2 Prior to lifting off while the ma...

Page 49: ...t beyond one meter 3 feet altitude then always descend slowly A panic drop can damage the helicopter 5 Always stand behind the model helicopter when learning how to hover because then you can watch the nose of the helicopter and a left tail rotor command will yaw the helicopter nose to the left and a right command will yaw to the right Similarly a left cyclic command will cause the helicopter to t...

Page 50: ...ercise of translational flight 2 After a few hours of practicing step 1 and you are comfortable with translational movement start using some tail rotor control so the helicopter nose will point slightly to the left or right as you fly it to the left or right Eventually this pattern will become a figure eight in front of you Please visualize these movements in your mind hovering at 1 1 5 meter 49 ...

Page 51: ...e carburetor needle is not set properly Close the needle turn it clockwise all the way then open the needle turn it counter clockwise 1 and 1 2 turns and try again If the model still will not lift then the engine maybe running too rich The symptom is the engine exhaust has a lot of smoke and the engine coughs and wants to quit when the transmitter throttle collective stick is moved up then close t...

Page 52: ...eration Do not glue any broken or damaged plastic part Do not repair broken rotor blades Always inspect the following items immediately a Engine starting shaft b All the gears c Main shaft flybar and blade feathering spindle d Tail boom and supports for cracks e Drive shaft for the tail rotor f Vertical and horizontal fins g Tail rotor shaft and control system h Main and tail rotor blades i Main f...

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Page 59: ... 5 5 HMJ2 8N M2x8 Self Tapping Screw 1 1 5 2 HMJ3 20N M3x20 Self Tapping Screw 2 1 5 PV0132 PITCH CONTROL ARM BK0075 Link Ball 4 8 2 1 5 4 BK0336 Pitch Frame 1 1 5 4 BK0407 Collar d3xD4x13 1 1 5 HMC3 10B Elevator Control Lever 1 1 5 HMC3 25B M2x14 Self Tapping Screw 1 1 5 HMJ2 10N M2x10 Sefl Tapping Screw 1 1 5 2 PV0133 ELEVATOR LEVER BK0075 Link Ball 4 8 2 1 5 3 BK0088 d3xD5x0 5 Washer 1 1 5 BK04...

Page 60: ...K0383 Tail Boom Bracket R 1 1 2 2 PV0162 FLYBAR PADDLE SET BK0406 Paddle Root 2 2 1 1 BK0416 Paddle Stopper 2 2 1 1 BK0432 Flybar Paddle 2 2 1 1 HME4 3B M4x3 Set Screw 4 2 1 1 PV0163 TAIL ROTOR BLADE BK0404 Tail Rotor Blade 2 3 1 PV0164 TAIL FIN BK0399 Vertical Fin 1 3 1 BK0400 Stabilizer Fin 1 3 1 BK0401 Stabilizer Fin Bracket 1 3 1 HMC3 30B M3x30 Socket Screw 2 3 1 HMM3B M3 Locknut 2 3 1 HSE3 12...

Page 61: ... 25B M3x25 Scket Screw 20 PV0217 SOCKET SCREW M3 28 HMC3 28B M3x28 Scket Screw 20 PV0218 SOCKET SCREW M3x8 HMC3 8B M3x8 Scket Screw 20 PV0219 SOCKET SCREW M4x10 HMC4 10B M4x10 Scket Screw 20 PV0220 SOCKET SCREW M4x12 HMC4 12B M4x12 Scket Screw 20 PV0221 SOCKET SCREW M4x18 HMC4 18B M4x18 Scket Screw 20 PV0222 SOCKET SCREW M4x25 HMC4 25B M4x25 Scket Screw 20 PV0223 SOCKET SCREW M4x8 HMC4 8B M4x8 Sck...

Page 62: ...3 PV0360 STARTER SHAFT BK0592 Starter Shaft 1 1 1 2 HME4 5B M4x5 Set Screw 2 1 1 2 HMS5 M5x8 E Ring 1 1 1 2 PV0361 STARTER COUPLING BK0594 Starter Couling 1 1 1 2 HME4 5B M4x5 Set Screw 2 1 1 2 PV0395 SUS FLYBAR ROD BK0640 SUS FlyBar Rod 1 2 1 PV0402 FLYBAR CONTROL ARM BK0655 Flybar Control Arm 2 2 1 1 BK0075 Link Ball 4 5 2 2 1 1 HMJ2 10N M2x10 Sefl Tapping Screw 2 2 1 1 BK0323 Flybar Arm Bushing...

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