4-STR OKE
AIRCRAFT ENGINE INSTRUCTIONS
THUNDER TIGER CORPORATION http://www.thundertiger.com
JA0518
No.9803 F-54S No.9802 F-75S No.9804 F-91S No.9813 F-130S
INTRODUCTION
Congratulations on your purchase of a Thunder Tiger Four-stroke model engine. These engines represent the
latest in Thunder Tiger design and manufacturing techniques employing advanced CAD design and CNC
manufacturing. All major components of Thunder Tiger engines are machined from the highest quality materials in
our state-of-the-art manufacturing plant. Engines are then subjected to rigorous quality control checks to ensure
that your engine will provide years of trouble-free use.
The F series powerhouse engines are the ultimate in four-stroke performance: the ability to swing a large prop,
increased torque, reduced noise and improved fuel economy. Featuring a twin-needle updraft carburetor, black
anodized cylinder head, oversized valves, and a high-performance silencer for best power-to-weight ratio.
Precision air bleed carburetor makes adjustments simple, and efficient mufflers keep things quiet at the field.
Perfect for the pilot looking for the authentic aircraft sound.
IMPORTANT
This engine will provide you with years of safe use, provided that you carefully follow these safety instructions:
1.
This model engine IS NOT A TOY, but a powerful miniature engine that is capable of inflicting damage to
both people and property if misused.
2.
Always mount the engine securely in a test stand or high-quality engine mount. Never, ever attempt to clamp
your engine in a vise.
3.
When operating your engine keep all spectators at least 20 feet away.
4.
Make sure that you use the correct propeller for your engine. Specific recommendations are listed in this
manual.
5.
Make sure that the propeller nut is securely fastened before each flight.
6.
Keep yourself away from the path of the propeller when running your engine.
7.
Keep your hands away from the propeller. Always use a “ Chicken Stick” or electric starter to start your
engine.
8.
Make all adjustments to the engine and carburetor from behind the propeller.
9.
Never use your hands or any other part of your body to stop the propeller. Do not throw any object into
the propeller to stop the engine. Cut off the fuel supply by removing the fuel line, pinching it closed, or
closing the throttle barrel completely.
10.
Never use a propeller that is cracked, nicked or damaged in any way.
11.
It is recommended that you wear safety glassed when operating any model engine.
12.
Do not run your engine around dirt, sand or loose gravel. Such material can be thrown into your eyes by the
propeller. In addition, the engine can be damaged by these materials entering the carburetor.
13.
Take care to keep all loose clothing, rags, tools, etc. away from the propeller.
14.
Keep all fuel lines, glow clips, etc. away from the propeller.
15.
Take care when handling your engine after running. Model engines get very hot during operation!
16.
Always operate your engine with proper ventilation. Model engines produce toxic fumes when run in a closed
room or confined area.
SPECIFICATIONS
Engine/Item No. F-54S/ 9803 F-75S/ 9802 F-91S/ 9804 F-130S/ 9813
Displacement (cc/cu.in)
Bore (mm/in)
Stroke (mm/in)
Practical R.P.M. (rpm)
Output power (HP/RPM)
Weight ( w/muffler) (g/oz)
8.87 / .541
24 / 0.945
19.6 / 0.772
2,200 ~ 13,000
0.8 / 12,000
419.6 / 14.80
12.33 / .752
28.3 / 1.114
19.6 / 0.772
2,300 ~ 12,000
1.2 / 11,000
457.2 / 16.13
14.97 / .914
28.3 / 1.114
23.8 /0.937
2,000 ~12,000
1.6/11,000
742.8 /26.20
21.28/ 1.298
33.6 / 1.323
24 / 0.945
2,000 ~ 12,000
2.2 / 11,000
822.5 / 29.01
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NECESSARY ACCESSORIES
The following items are necessary for operating your engine, and are available from your local hobby supplier.
■Fuel
A good quality, commercially available fuel containing 20% oil and 10-15% nitro is recommended for use in
Thunder Tiger four-stroke engine. Fuels containing a blend of both castor and synthetic oils is best. Fuels
containing only castor oil are not recommended! (during breaking-in period, it is recommeded to use fuel
containing at least 20% lubrication oil.)
■Glow Plug
Four-stroke engines produce one explosion for every two revolutions. A specific type of glow
plug is required for your four-stroke engine. The type and quality of glow plug used in your
engine can affect overall performance and reliablity. For Thunder Tiger four-stroke engine, we
Glow Plug
strongly recommend Thunder Tiger’s new Red Line RF high-performance glow plug #9776.
Other brands of glow plug such as O.S.:Type F, Saito:P-1, Hangar9 #3010 and McCoy MC-4C
are also suitable for your Thunder Tiger four-stroke engine.
■Glow Starter
Glow Starter
1.2~1.5V power source for heating the glow plug during engine start up. Thunder Tiger offers a
series of rechargable glow starters to suit your power requirements.
■Plug Wrench
Used for tightening the glow plug as well as the propeller nut. A Thunder Tiger #1102 4-way
wrench is recommended.
Plug Wrench
■Fuel Pump or Bottle
Required to fill the fuel tank on your model . A Thunder Tiger hand-crank pump (#1645) or
12V electric pump ( #1658) are available from your hobby dealer.
Fuel pump
■Chicken Stick / Safety Stick
Used to flip the propeller when starting the engine by hand. Never use your fingers to start a model engine!
■Electric Starter
Most engines can be started quickly with an electric starter. Used with a 12 volt battery, it is
the safest and most convenient method.
■Propeller
Suggested propeller sizes are shown in the table below, with allowances for different type of
aircraft and performance goals. Factors such as aircraft weight, size, flying style will affect your
choice of props. After break-in, select the optimum prop size and test-fly. Begin your tests with suggested
propeller sizes in the table below:
Engine
F-54S
F-75S
F-91S
F-130S
Breaking - in
11x5
11×8
11x10
14x10
Stunt/Aerobatic
10x9,11x10,11x5,11x6, 11x7
11x8,11x9,12x7, 12x8,12.5x6
11x10,11x11,12x10,12x11, 13x9
13x11~13,14x10~11
Scale
11x8,12x7,12x8
13.5x8,14x7,11x7(3blade)
14x7, 15x6, 16x6,12x8(3-blade)
15x8,16x6~8,18x5~6
Electric Starter
Caution
It is very important to use a well-balanced propeller and spinner. An unbalanced propeller or spinner can
cause substantial damage to both the aircraft and engine.
■Fuel Tank
Choose a proper fuel tank as recommended by the manufacurer of your airplane kit. Thunder Tiger offers a
series of fuel tanks that are available at your hobby dealer.
■Fuel Line
Choose a high quality, silicone fuel line for use with your Thunder Tiger engine.
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