THUNDER TIGER Raptor 90 3D, Assembly And Maintenance Manual

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SETTINGS
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First, try to move the 12mm main rotor shaft up a nd down, it should not have any free play. If it can be moved up and down,
loosen the 4 bolts holding the lower bearing block and move it upward to eliminate the free play. Move pinion gear subassembly
and engine mount side to side until the gears can be turned smoothly and freely with a minimum of backlash.
The Raptor 90 3D is designed to accept a diverse gear ratio to suit different flying needs. Currently the main gear is available
with 91,93,94 and 95 teeth. The clutch pinion is available with 10,11 and 12 teeth. This gives the pilot a choice of twelve different
gear ratios ranging from 7.6 to 9.5 to one. When a 90 class engine is used for 3D flying, we recommend the 11 teeth pinion and
91 teeth main gear first which give 8.27:1 ratio.
Engine Mount
Lower BRG Subassembly
Pinion Gear Sub-Assembly
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On the left side frame, there are three pitch scales
molded onto the Pitch Guide. The three different
scales are designed for beginner , F3C and 3D
pilots.
Use the "Pointer" on the collective tray and the
plastic molded scales to set up the initial collective
control.
The actual blade angle in degrees can be checked
by a pitch gauge (sold separately).
13˚
11˚
0˚
-9˚
-11˚
0˚
13˚
11˚
-9˚
-11˚
POINTER
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Collective Travel for 3D
6-3-2
For 3D flying, adjust the servo rotation so the collective travel
range will be between -11˚ and 13˚. The servo horn will be
horizontal when pointer is level with the 0˚ mark.
-11˚
0˚
13˚
0˚
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Always operate or fly a model helicopter in a safe manner and away from crowd, or spectators,
or distractions.
Do not operate model helicopters in rainy or windy condition.
Check to make sure there is no radio interference before operating a model helicopter.
Make sure the transmitter and receiver batteries are fully charged before operation.
Make sure all controls operate properly before flight.
Model helicopter main and tail rotors operate at high rpm, therefore make sure nothing can come
into contact with the rotors during flight.
Use only model engine fuel. Do not use gasoline, kerosene, or any other substitute.
Model engine fuel is highly flammable.
Do not let model engine fuel get in contact with eyes. Do not intake model engine fuel.
Range check the radio before flying. The servos must operate properly with the transmitter
antenna collapsed and at 20 meters away.
The engine must be in the idle position 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 immediately after the engine was run, because they will be
extremely hot.
Warning (Items to watch out after flight)
Inspect the model helicopter thoroughly to make sure nothing is loosen or damaged.
Pump out the remaining fuel from the fuel tank.
Lubricate every moving part with oil to ensure a smooth operation in the future.
Warning (For Storage)
Keep the model in a cool, dry place. Avoid storage under direct sun light or near heat.
Add some engine after-run oil through the carburetor, then crank the engine by an electric starter.
This help to prevent the engine bearings from rusting. After-run oils are available from hobby
shops.
Please replace any damaged parts if they are discovered during maintenance.
Attention
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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.
(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.
In the event the model has crashed.
Inspect the flybar, rotor shaft and the blade spindle to make sure they are not bent at all. If any item is damaged, it
must be replaced by a new part to ensure safe operation. 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 fins.
(g).
Tail rotor shaft and control system.
(h).
Main and tail rotor blades.
(i).
Main frame.
The optional Pitch Gauge (#3802)
is recommended as shown.
Note:Recommended rotorspeed is 1450~1550 rpm for hover and 1800~1900 rpm for idle-up aerobatics.
The side frame on the Raptor 90 3D have elongated slots for the engine mounting bolts and for the engine starting shaft support
bearing block. Loosen all bolts for the engine mount and for the start shaft bearing block. Shi ft the engine and engine shaft
bearing block forward and back until there is a goo d gear mesh bet ween the main gear and the clutch pinion. Spin the main
gear by hand to check if the gear turns smoothly. It is critical that the engine crankshaft and starting shaft is perfectly straight
and vertical as shown in the figure of 6-1. Otherwise, the clutch linear and bearings will wear rapidly and there will be excessive
vibration. When you are satisfied with the alignment, remove some of the bolts and add Loctite, then tighten all bolts again.
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Beginner Setup
Use these settings as a start only.
Program the radio values into the transmitter. The EXPO
can reduce the control sensitivity near center stick, some
radio manufacturer use negative value and some use positive
value. Adjust the pushrods to the lengths above. Then fine
tune the lengths to get the desired blade angles. Fly the
model to fine tune the value.
3-D Setup
After Flight Checklist
Always make sure the flybar paddles, swashplate, and top of metal frame are parallel.
A
B
C
A // B // C
Collective Travel for Hovering
6-3-1
0˚
12˚
The hovering pitch angle should be at 4.5˚ to 5.5˚ to get 1450
to 1550 RPM. See page 42 for ATV setting in transmitter.
Beginners should not use more than -2˚ negative pitch, otherwise
the helicopter may slam into the ground when the pilot panics
in emergency situations. Beginner should also disable or inhibit
the Idle-up and Throttle Hold functions in the transmitter.
-2˚
79mm
110mm
66.5mm
43mm
113.5mm
77.5mm
97.5mm
30mm