Single Cylinder Miniature Internal Combustion Engine Coming Soon | Stirlingkit

Single Cylinder Miniature Internal Combustion Engine Coming Soon | Stirlingkit

Single Cylinder Miniature Internal Combustion Engine Coming Soon | Stirlingkit


A single cylinder engine is a type of internal combustion engine that consists of a single piston, cylinder, and combustion chamber. It is a simple and compact design that is commonly used in small engines, such as those found in motorcycles, lawn mowers, and generators. We released the ENJOMOR 10cc Whippet Flathead Water-cooled 4 stroke Gasoline Engine in November 2021 and here is another single cylinder engine model coming soon. 

You can check the ENJOMOR 10cc Whippet Flathead Water-cooled Gasoline Engine below and look back on the previous blog. 
Sorry for the misunderstanding. M1 is not the final product number and the name is not confirmed yet. We just share some information day by day to attract people's attention. Our plan is : day 1 is to share the features of the engine, day 2 is to share the background of the engine, day 3 is to share the faq of this engine. sorry for the misunderstanding. Salute to the great Edgar T. Westbury.
Part 1: Prototype engine

 ETW published the design for the "Kittiwake" engine in 1944 after conducting extensive testing. In his book on Model Petrol Engines, he claimed that it was a development of the 1935 Kiwi Mk 1. However, this claim is somewhat misleading, as the design actually dates back to 1930 and the components of the "Kittiwake" engine were based on an original and delicate geo. Kennion blueprint. 

The blueprint featured ball bearings and a wet sump, which were improvements over the Kiwi engine. The castings were intended for a water-cooled engine, although the blueprint depicted an air-cooled version. The engine boasted a finely crafted V-arrangement for the pushrod-operated overhead valves.

In a 1944 issue of Model Engineer (ME 2275), ETW described the "Kittiwake" engine as a 15cc air-cooled model. In my opinion, this is one of Edgar Westbury's most aesthetically pleasing designs. The engine is well-made and turns over smoothly. Unfortunately, it sustained damage while on display when it was dropped onto the rocker cover. This serves as a reminder that engines should be used regularly to keep them in good condition. Despite being a bit fiddly to repair, it is worth the effort as "Kittiwake" engines are becoming increasingly rare. It was  designed for and used in Hydroplane Tether Boats. You can read more about the application of his engines.

Tethered Hydro

Tethered Hydroplanes




We made the replica of this retro engine and several changes,  like our CISON v-twin Panhead & Panhead motorcycle engine models.  We have considered making a water-cooled structure before, however,  there may be insufficient space since it has a built-in oil pump already and add a built-in water pump with a large flow rate and water channel. Therefore, it is designed to be added to the cylinder barrel and cylinder head. More heat sinks are added, but users who like water cooling can add an external water pump to work with the engine later)  It will be considered to make it easier to change the engine to water cooling, or the easiest way to use a separate water pump and external water cooling.

MUSA FV1A KW-OHV 7cc Air-cooled OHV Four-stroke Single-cylinder Gasoline Engine Model is a multi-fuel single-cylinder engine, you can use gasoline & kerosene. It has old-school mechanical points/contact ignition.


Part 2: Features

Here is the specification comparison chart of the two single cylinder engine model.  

P.S. M1 is the temporaty name of the engine. The blank specifications will be updated later. 
Updates about the name.
With your support and love for this engine, we settled the engine name. Based on the "Kittiwake" designed by Edgar T. Westbury, some improvements have been made, and then it is named "RED DOG", similar to the whippet. The top logo is a tribute to the author, and the bottom is the product code FV1A
F = four-stroke
V= vertical
1=single cylinder
A = the first batch
Product MUSA FV1A KW-OHV 7cc Single Cylinder Air-cooled Engine Model ENJOMOR 10cc Whippet Flathead Water-cooled Gasoline Engine
Color Green  Green
Item OHV  Flathead Engine
Product Form Finished Product (Assembled) Finished Product (Assembled)
Cylinder Vertical Single Cylinder Vertical Single Cylinder
Stroke:  4 x 22.5 mm 4 x 19mm
Displacement 7cc 10cc
Bore 20mm 25mm
Practical RPM 1800-6000  2000-6000
Output about 0.5 ps  0.5ps
Cooling method air cooling water cooling
Starting  pull start or electric drill   pull start or electric drill 
Ignition Mechanically timed ignition /Ignition Breaker Assemblies CDI igniter 
Lubrication  independent lubrication  independent lubrication
Fuel 92# and above gasoline or kerosene gasoline
Product Dimensions 10 x 7 x 13.3cm 11.3 x 11.7 x 11.2cm


The FV1A engine is a masterpiece of engineering that is built to impress. Designed with a tribute to the classics in mind, this miniature vertical single-cylinder four-stroke engine will arouse the retro feelings and resonance of more engine model lovers and players, and is sure to be a popular choice among enthusiasts. 







 Part 3 Why this single cylinder engine? What are the highlights? 


When it comes to material selection, the FV1A engine uses only the highest quality metal materials, mainly aluminum alloy, brass, and steel. The workmanship is of excellent quality, with the main body manufactured by CNC and the cylinder head/middle cylinder and other components cast. The one-piece crankshaft is quenched and hardened, while the special metal steel piston ring is treated with anodic oxidation or electrophoretic coloring on the surface, showing the retro industrial mechanical texture of the engine.

One of the key features of the FV1A engine is its exquisite appearance. The engine boasts a unique and beautiful green + black color matching, with an OHV valve train and a compact structure. The engine parts have raw and very refined geometry, with a fine V-arrangement for pushrod-operated overhead valves. This clever design ensures that the engine is not only aesthetically pleasing but also built to perform.

The FV1A engine delivers on all fronts. With a displacement of 7cc, bore of 20.0mm and stroke of 22.5mm, this engine is capable of achieving speeds of 1800-6000 rpm, while producing about 0.5ps of power. The long-stroke design, high torque output, and specially designed power output performance make it an ideal choice for seaplane tethered boat models.

Speaking of its air-cooled structure, it is common in many applications, air-cooled engines offer a number of advantages in certain situations. Air-cooled engines tend to be lighter and more compact than water-cooled engines, which makes them a good choice for applications where space is limited or weight is a concern. Additionally, air-cooled engines are less complex than water-cooled engines, which can make them easier to maintain and repair.  

Stirlingkit is dedicated to providing the best scale engine models for engine enthusiasts. We are passionate about lowering the barriers for engine hobbyists to access scale models, and we welcome professionals, hobbyists, DIY builders, artists, teenagers, and everyone else who shares our passion for engine building. Our community is diverse and inclusive, and we are committed to bringing people together from all walks of life and skill levels. We believe that by nurturing a love for engine building in young people, we can help to ensure the continued growth of this rewarding hobby for years to come. So we prefer to design this single cylinder engine model as air cooled one to be more accepted by beginners. We will upload a reference video to show how to assemble, tune, disassemble the engine.

At the same time, we have large-area heat sink to ensure good and sufficient air-cooled heat dissipation effect and it can be considered to add an external water pump to work with the engine, we will also provide a concept map for the modification of water-cooled one.

One of the main challenges of designing this an air-cooled engine is managing the heat generated by the engine's operation. To address this challenge, the engine is designed with a number of heat sinks that help to dissipate heat away from the engine's critical components. These heat sinks are located on the cylinder barrel and cylinder head, where they can be most effective at managing heat. 

The unique carburetor and ignition breaker assemblies of this engine are also noteworthy, as they are designed to be efficient and reliable. These components are essential to the engine's operation, as they ensure that the proper mixture of fuel and air is delivered to the engine's combustion chamber at the right time. The carburetor is responsible for mixing fuel and air in the proper proportions, while the ignition breaker assembly ensures that the fuel-air mixture is ignited at the right moment to produce maximum power.

Its fuel versatility also features. It can run on a variety of fuels, including gasoline and kerosene. In terms of fuel compatibility, this engine is designed to run on gasoline, kerosene, and methanol, which makes it a versatile choice for a wide range of applications. This feature is especially useful for users who need to switch between fuels depending on availability, cost, or environmental considerations.

In terms of its dimensions, the engine measures 100mm x 70mm x 133mm. It features a bore of 20mm and a stroke of 22mm. These dimensions make it a compact and lightweight engine that can be used in a variety of applications.

One of the key features of this engine is its OHV valve train, which stands for Overhead Valve. This means that the engine has its valves located in the cylinder head, rather than in the block, which is a common configuration for smaller engines. This design allows for better airflow and combustion, resulting in improved performance, increased fuel efficiency, and reduced emissions.

The independent lubrication system ensures that the engine is properly lubricated at all times. This system includes a built-in oil pump, which circulates oil throughout the engine to prevent wear and tear, reduce friction, and increase the engine's lifespan. This feature is especially important for engines that are used in harsh environments, as it can help prevent damage caused by contaminants, such as dirt, debris, and water.

It has been a must-have for anyone looking to take their engine model game to the next level. So why wait? Preorder your FV1A engine today and experience the power and performance of this extraordinary engine for yourself!









Part 4 How is the quality? What we have done for this engine? 

To ensure the quality of the FV1A engine, there are specific standards that should be considered.

When it comes to evaluating the quality of a single cylinder four-stroke engine model like the FV1A engine, there are several key standards that should be considered. These include the engine's design, power output, cooling and lubrication systems, ignition method, material selection, and manufacturing process.

First and foremost, the design of the engine should be well-thought-out and efficient. The FV1A engine, with its vertical single cylinder and OHV valve train, has a compact and clever design that maximizes its performance while minimizing its size and weight. The V-arrangement for the pushrod-operated overhead valves is a particularly fine detail that speaks to the precision and attention to detail in the engine's design. 

Of course, a good engine design is only as good as its power output. The FV1A engine's long-stroke design and high torque output make it a powerful choice for seaplane tethered boat models. Its maximum power output of about 0.5ps is not particularly high, but it is more than sufficient for the engine's intended use.

Another important aspect of engine performance is its cooling and lubrication systems. The FV1A engine uses air cooling and an independent lubrication system with a built-in oil pump and wet oil pan. The large-area heat sink ensures that the engine stays cool even at high speeds, while the independent lubrication system ensures that the engine is well-lubricated for maximum performance and longevity.

The ignition method is also an important consideration when evaluating engine quality. The FV1A engine uses a unique ignition circuit breaker assembly (mechanical external ignition) that ensures reliable and efficient ignition, even under challenging conditions. The anti-spill carburetor is another clever feature that ensures smooth and consistent fuel delivery.

When it comes to material selection, high-quality metals like aluminum alloy, brass, and steel are critical for ensuring the engine's durability and performance. The FV1A engine uses these materials judiciously, with the main body manufactured using CNC technology and the cylinder head and middle cylinder possibly cast. The one-piece crankshaft is quenched and hardened for maximum strength, while the special metal steel piston ring is treated with anodic oxidation or electrophoretic coloring to enhance its appearance and texture.

The manufacturing process is also an important aspect of engine quality. The FV1A engine's workmanship is of excellent quality, with attention paid to every detail of the manufacturing process. The engine is carefully assembled using high-quality materials and modern manufacturing techniques, resulting in an engine that is both reliable and aesthetically pleasing. The engine's workmanship must be of excellent quality. The manufacturing process should be precise, and the engine's parts must be assembled correctly to ensure that the engine runs smoothly.

The FV1A engine model is a high-quality choice for model engine enthusiasts and players. Its retro design and clever engineering make it a standout choice, while its power output, cooling and lubrication systems, ignition method, material selection, and manufacturing process all contribute to its overall quality and performance. Whether you are a seasoned model engine enthusiast or a newcomer to the hobby, the FV1A engine model is a great choice that is sure to impress.


Part5 Precautions


The FV1A engine is a powerful and reliable gasoline/kerosene internal combustion engine that is designed for use in model engines, specifically seaplane tethered boat models. While this engine is a tribute to classic designs and boasts exquisite craftsmanship, it is important to use the engine with caution and follow proper precautions to ensure optimal performance and safe operation.

One of the most important precautions for using the FV1A engine is to ensure that the engine is properly lubricated. The engine features an independent lubrication system that includes a built-in oil pump and a wet oil pan. It is important to use the recommended 5W-20 or 5W-30 4T oil to ensure proper lubrication and extend the engine's service life. Additionally, it is important to regularly check the oil level and replace the oil as recommended by the manufacturer.

Another important precaution for using the FV1A engine is to ensure that it is properly cooled. The engine features air-cooling technology with a large-area heat sink to dissipate heat effectively. However, in certain operating conditions, it may be necessary to add an external water pump to ensure sufficient cooling. It is important to monitor the engine's temperature and take necessary precautions to prevent overheating, such as adjusting the engine's speed or reducing the load on the engine.

Proper maintenance is also crucial for ensuring safe and optimal performance of the FV1A engine. Regular cleaning and inspection of the engine's components, such as the spark plug and carburetor, can help prevent damage and ensure that the engine is operating at its best. Additionally, it is important to follow the manufacturer's recommended maintenance schedule for oil changes, filter replacements, and other routine maintenance tasks.

When operating the FV1A engine, it is important to follow all safety precautions to prevent injury or damage to the engine. This includes wearing appropriate safety gear, such as gloves and eye protection, when handling the engine or operating it. Additionally, it is important to follow proper starting procedures, whether using an electric drill or manual start, to prevent damage to the engine or injury to the operator.

Finally, it is important to use the FV1A engine only with compatible fuels and power supplies. The engine is designed to run on 92# and above gasoline or kerosene and requires a 6-12V power supply for starting. Using incompatible fuels or power supplies can damage the engine and potentially cause injury or damage.

By following proper precautions for use, including proper lubrication and cooling, regular maintenance, and following safety procedures, users can enjoy the performance and durability of this classic-inspired engine.

shop earlier, save the best price. just only $379.99! discount code:120



  • Dennis : March 31, 2023

    Poppin Johnny

  • Shelby Langston: March 24, 2023

    The Little Green Bastard

  • Frederic Beitz: March 23, 2023

    This little engine remember me when in the 70’s I was using a Bernard Motor Generator for powering my radiolocalization beacons…. Little Bernard should be fine… ;-)

  • Aexander: March 23, 2023

    Personally, I’d like to see it called the “Wyvern” but that’s just me…..

  • Jon Cook: March 23, 2023

    I like Zach Bradshaw’s “Tiny Tim” suggestion… or maybe “Musa Tiny Tim”

  • Dyron Cerigny: March 23, 2023

    The name should be ( Snapit ) like the other Enjomor (Whipit)

  • NEOBRUNOX35: March 23, 2023

    Uc & Baid motor
    Unique Carburetor & Breaker Assembly-Ignition design ;-)

  • Danny Ponce: March 23, 2023

    Water cooled Watermelon flathead engine

  • Bill white: March 23, 2023

    The Thumper

  • James wright: March 22, 2023

    Call the engine “old reliable”

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Danna is the editor-in-chief of our website blog and has been worked with stirlingkit for over five years.


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