Product
 | The PRO series helicopter ring-type engines are equipped with dual ball-bearings, Schnuerle porting, one ring-type piston / cylinder assembly and two-needles automatic mixture control carburetor. Thunder Tiger’s .39 helicopter engines provide the smooth power for your demand. Displacement at .394 cubic inches is the largest displacement engine available in the popular 30-size helicopter class, and directly fit in all popular machines. Precision air bleed carburetor makes adjustments simple, and efficient mufflers keep things quiet at the field. |  |
 | Thunder Tiger's .21 Outboard engine features a fresh, innovative design that is sure to increase the popularity of the 3.5cc Tunnel Hull class. A race-proven Pro.21 M-R power head is mated to a lower unit that utilizes the best aspects of gear and flex-cable drive technology. A special set of precision helical gears transfers power from the crankshaft to the flex-cable, resulting in substantially reduced cable wear and maintenance, while the integrated expansion chamber/muffler reduces exhaust noise. The engine mount allows adjustment to both propeller depth and angle, and a Prather S215 prop. is also included. | |
| Thunder Tiger's .21 Outboard engine features a fresh, innovative design that is sure to increase the popularity of the 3.5cc Tunnel Hull class. A race-proven Pro.21 M-R power head is mated to a lower unit that utilizes the best aspects of gear and flex-cable drive technology. A special set of precision helical gears transfers power from the crankshaft to the flex-cable, resulting in substantially reduced cable wear and maintenance, while the integrated expansion chamber/muffler reduces exhaust noise. The engine mount allows adjustment to both propeller depth and angle, and a Prather S215 prop. is also included. | |
 | The new Pro-12/15/18 engines have been designed to achieve the easiest operation and max performance again. The all new Pro-18 big block engine creates incredible plenty of horse-power more than the previous .15 engine, which is the best choice for the out-law race. The new Pro-12/15/18 are available in several versions with the same mounting dimensions, making it drop-in easy to upgrade. All of series are available with built-in recoil starters ("X" type). The PRO-12BXP and PRO-15BXP are available for the previous RTR cars of the Thunder Tiger. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | The new Pro-12/15/18 engines have been designed to achieve the easiest operation and max performance again. The all new Pro-18 big block engine creates incredible plenty of horse-power more than the previous .15 engine, which is the best choice for the out-law race. The new Pro-12/15/18 are available in several versions with the same mounting dimensions, making it drop-in easy to upgrade. All of series are available with built-in recoil starters ("X" type). The PRO-12BXP and PRO-15BXP are available for the previous RTR cars of the Thunder Tiger. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | The new Pro-12/15/18 engines have been designed to achieve the easiest operation and max performance again. The all new Pro-18 big block engine creates incredible plenty of horse-power more than the previous .15 engine, which is the best choice for the out-law race. The new Pro-12/15/18 are available in several versions with the same mounting dimensions, making it drop-in easy to upgrade. All of series are available with built-in recoil starters ("X" type). The PRO-12BXP and PRO-15BXP are available for the previous RTR cars of the Thunder Tiger. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | The new Pro-12/15/18 engines have been designed to achieve the easiest operation and max performance again. The all new Pro-18 big block engine creates incredible plenty of horse-power more than the previous .15 engine, which is the best choice for the out-law race. The new Pro-12/15/18 are available in several versions with the same mounting dimensions, making it drop-in easy to upgrade. All of series are available with built-in recoil starters ("X" type). The PRO-12BXP and PRO-15BXP are available for the previous RTR cars of the Thunder Tiger. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | Designed to achieve the easiest operation and max performance again and again. The PRO .21/.28 Series have the most raw power & durability simultaneously! Of course, the new webbed reinforced compact crankcase is made for added wearing resistance and provides effective heat dispersion to meet the demands of long term usage. The PRO series are manufactured by automated computer-controlled machinery, using the highest quality materials. State-of-the-art CNC manufacturing techniques produce not only high performance and reliability but a product that looks and performs better. Precision mixture control carburetor makes adjustments simple. The crankshaft is lightened, and balanced to get a fuel mixture more smoothly. The .21/.28 engines fits in the same mounting space as the original .21/.28 engines, with no additional weight - but delivers greater output and higher practical rpm. All of series are available with built-in recoil starters ("X" type). The "D" type series engine features with dual starting system, recoil starter and rotor starter. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | Designed to achieve the easiest operation and max performance again and again. The PRO .21/.28 Series have the most raw power & durability simultaneously! Of course, the new webbed reinforced compact crankcase is made for added wearing resistance and provides effective heat dispersion to meet the demands of long term usage. The PRO series are manufactured by automated computer-controlled machinery, using the highest quality materials. State-of-the-art CNC manufacturing techniques produce not only high performance and reliability but a product that looks and performs better. Precision mixture control carburetor makes adjustments simple. The crankshaft is lightened, and balanced to get a fuel mixture more smoothly. The .21/.28 engines fits in the same mounting space as the original .21/.28 engines, with no additional weight - but delivers greater output and higher practical rpm. All of series are available with built-in recoil starters ("X" type). The "D" type series engine features with dual starting system, recoil starter and rotor starter. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | Designed to achieve the easiest operation and max performance again and again. The PRO .21/.28 Series have the most raw power & durability simultaneously! Of course, the new webbed reinforced compact crankcase is made for added wearing resistance and provides effective heat dispersion to meet the demands of long term usage. The PRO series are manufactured by automated computer-controlled machinery, using the highest quality materials. State-of-the-art CNC manufacturing techniques produce not only high performance and reliability but a product that looks and performs better. Precision mixture control carburetor makes adjustments simple. The crankshaft is lightened, and balanced to get a fuel mixture more smoothly. The .21/.28 engines fits in the same mounting space as the original .21/.28 engines, with no additional weight - but delivers greater output and higher practical rpm. All of series are available with built-in recoil starters ("X" type). The "D" type series engine features with dual starting system, recoil starter and rotor starter. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | Designed to achieve the easiest operation and max performance again and again. The PRO .21/.28 Series have the most raw power & durability simultaneously! Of course, the new webbed reinforced compact crankcase is made for added wearing resistance and provides effective heat dispersion to meet the demands of long term usage. The PRO series are manufactured by automated computer-controlled machinery, using the highest quality materials. State-of-the-art CNC manufacturing techniques produce not only high performance and reliability but a product that looks and performs better. Precision mixture control carburetor makes adjustments simple. The crankshaft is lightened, and balanced to get a fuel mixture more smoothly. The .21/.28 engines fits in the same mounting space as the original .21/.28 engines, with no additional weight - but delivers greater output and higher practical rpm. All of series are available with built-in recoil starters ("X" type). The "D" type series engine features with dual starting system, recoil starter and rotor starter. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | Designed to achieve the easiest operation and max performance again and again. The PRO .21/.28 Series have the most raw power & durability simultaneously! Of course, the new webbed reinforced compact crankcase is made for added wearing resistance and provides effective heat dispersion to meet the demands of long term usage. The PRO series are manufactured by automated computer-controlled machinery, using the highest quality materials. State-of-the-art CNC manufacturing techniques produce not only high performance and reliability but a product that looks and performs better. Precision mixture control carburetor makes adjustments simple. The crankshaft is lightened, and balanced to get a fuel mixture more smoothly. The .21/.28 engines fits in the same mounting space as the original .21/.28 engines, with no additional weight - but delivers greater output and higher practical rpm. All of series are available with built-in recoil starters ("X" type). The "D" type series engine features with dual starting system, recoil starter and rotor starter. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | The new Pro-12/15/18 engines have been designed to achieve the easiest operation and max performance again. The all new Pro-18 big block engine creates incredible plenty of horse-power more than the previous .15 engine, which is the best choice for the out-law race. The new Pro-12/15/18 are available in several versions with the same mounting dimensions, making it drop-in easy to upgrade. All of series are available with built-in recoil starters ("X" type). The PRO-12BXP and PRO-15BXP are available for the previous RTR cars of the Thunder Tiger. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | The Pro-70 was given two modifications: a new carb and a unique starting system. Dropping the Thunder Tiger Pro-70BK(R) engine on your monster truck, makes it not just fast, but to be powerful enough for wheelie. | |
 | Designed to achieve the easiest operation and max performance again and again. The PRO-50BK Series have the most raw power & durability simultaneously! The "K" version features a built-in hexagonal shaft starting system, to start it with ease. Of course, the new webbed reinforced compact crankcase is made for added wearing resistance and provides effective heat dispersion to meet the demands of long term usage. | |
 | The new Pro-12/15/18 engines have been designed to achieve the easiest operation and max performance again. The all new Pro-18 big block engine creates incredible plenty of horse-power more than the previous .15 engine, which is the best choice for the out-law race. The new Pro-12/15/18 are available in several versions with the same mounting dimensions, making it drop-in easy to upgrade. All of series are available with built-in recoil starters ("X" type). The PRO-12BXP and PRO-15BXP are available for the previous RTR cars of the Thunder Tiger. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | The new Pro-12/15/18 engines have been designed to achieve the easiest operation and max performance again. The all new Pro-18 big block engine creates incredible plenty of horse-power more than the previous .15 engine, which is the best choice for the out-law race. The new Pro-12/15/18 are available in several versions with the same mounting dimensions, making it drop-in easy to upgrade. All of series are available with built-in recoil starters ("X" type). The PRO-12BXP and PRO-15BXP are available for the previous RTR cars of the Thunder Tiger. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | The new Pro-12/15/18 engines have been designed to achieve the easiest operation and max performance again. The all new Pro-18 big block engine creates incredible plenty of horse-power more than the previous .15 engine, which is the best choice for the out-law race. The new Pro-12/15/18 are available in several versions with the same mounting dimensions, making it drop-in easy to upgrade. All of series are available with built-in recoil starters ("X" type). The PRO-12BXP and PRO-15BXP are available for the previous RTR cars of the Thunder Tiger. The " K" type series engines feature a built-in hexagonal shaft starting system that can be operated to start the engine easily and quickly. | |
 | Requires:
8mm wrench or 4 way wrench
After running for a while, the element might become dark brown. It is carbon around the surface of the glow plug element and may cause the engine hard to start and running rough. Replace or try another colder or hotter type glowplug as necessary.
The following symptoms may be caused by improper choosing of glow plug type.
Too cold: Poor throttle response at bottom end, unsustainable idle, and a slow engine acceleration and the engine gets too cool at idle.
Too hot: After running the engine at the highest speed for a while, engine hesitates to slow down to a stable idle when abruptly close the throttle to the lowest, the glow plug is burnt very easy and engine temperatures is high.
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 | The PRO-120's available in the traditional side exhausted and rear, delivers the torque and power necessary to make today's larger airplane performs well and provides years of trouble-free performance. | |