National Aviation Day: Explore the Engines That Make Flight Possible | EngineDIY

Every August 19, the United States celebrates National Aviation Day, a day dedicated to the history, technology, and people who made flight possible. The date was chosen to honor Orville Wright's birthday, and President Franklin D. Roosevelt established August 19 as an ongoing National Aviation Day observance in 1939.

For aviation enthusiasts, however, celebrating flight does not have to stop at aircraft museums or watching planes take off.

One of the most fascinating ways to understand aviation is to look at what is inside the aircraft engine.

From the radial engines that powered early aircraft to the dual-spool turbofans used in modern aviation, aircraft propulsion has evolved dramatically. Today, working aviation engine models make it possible to explore that evolution directly on a desk.

If you're looking for an aviation engine model, jet engine model kit, or STEM project, here's a practical guide to the different types—and which TECHING model may be right for you.

From Piston Engines to Turbofans: A Short History of Aircraft Propulsion

Early aircraft relied heavily on piston engines because they offered a relatively simple way to convert fuel energy into mechanical power.

The radial engine became particularly important during the golden age of piston-powered aviation. Its cylinders are arranged around a central crankcase, creating the distinctive "star" shape that many aviation enthusiasts recognize today.

The Smithsonian's National Air and Space Museum preserves several historic five-cylinder radial engines. The Langley-Manly-Balzer radial, for example, was developed specifically as an aircraft powerplant and demonstrated how engineers were already focused on achieving a useful balance between power and weight in early aviation.

Later, aviation moved toward gas-turbine propulsion.

Instead of using pistons to produce mechanical motion, a turbine engine continuously compresses air, adds fuel, burns the mixture, and extracts energy from the resulting high-speed gases.

That basic principle led to several different engine architectures—including turbojets, turbofans, and turboshaft engines.

What Makes a Turbofan Engine Different?

If you've ever looked at a modern commercial aircraft, you've probably noticed the large fan at the front of the engine.

That fan is one of the key features of a turbofan engine.

In a typical turbofan, incoming air is divided into two main paths. Some air enters the engine core, where it is compressed and participates in combustion. A much larger portion can travel around the core as bypass air. The combination of core and bypass airflow produces thrust.

Many modern turbofans also use a two-spool architecture.

In simple terms, this means different compressor and turbine sections are connected to separate rotating shafts. One spool can operate at a different speed from the other, allowing the engine to manage airflow and compression more effectively. NASA describes this arrangement as one spool for the fan system and another for the core.

This is one reason a turbofan is such an interesting subject for a working model: there is far more happening inside than the fan you see from the outside.

Which Aviation Engine Model Should You Choose?

Not every aviation enthusiast wants the same type of project.

Some people want the most detailed build possible. Others want a compact STEM model, a historical aircraft engine, or a display piece that demonstrates how a modern jet engine works.

Here's how the TECHING range compares.

For Serious Builders: 1/10 Dual-Spool Turbofan

With 1,000+ pieces, the 1/10 TECHING turbofan is the choice for builders who enjoy detailed mechanical assembly and want a substantial aviation centerpiece.

It's less about simply displaying an engine and more about experiencing the structure of a modern turbofan through the building process.

Choose this if: complexity and mechanical detail are your priority.

For a More Approachable Turbofan: 1/12 Dual-Spool Turbofan

The 1/12 version offers the same basic fascination with modern turbofan architecture in a more compact format.

With around 300 pieces, it's a good middle ground between a highly complex collector's build and a simple educational model.

Choose this if: you want a realistic turbofan without taking on the largest build.

For STEM Learning: Mini Turbofan

For students, families, classrooms, and first-time builders, the TECHING Mini Turbofan is the easiest place to start.

Its compact design makes the basic relationship between the fan, compressor, combustion section, and turbine easier to introduce without overwhelming the builder.

Choose this if: learning and accessibility matter more than maximum complexity.

For Aviation History: 5-Cylinder Radial Engine

If your interest in aviation began with vintage aircraft rather than modern airliners, the TECHING 5-Cylinder Radial Engine offers a completely different experience.

Instead of studying airflow through multiple turbine stages, you're exploring the mechanical movement of a classic piston-engine layout.

Choose this if: you prefer vintage aircraft and traditional mechanical engineering.

For Helicopter Fans: DM136 Turboshaft

The TECHING DM136 Turboshaft focuses on the type of turbine technology used to provide mechanical power for helicopters.

It is an excellent option for enthusiasts who want to explore the relationship between a turbine engine, shaft power, and rotorcraft propulsion.

Choose this if: helicopters and turbine power systems are your main interests.

Find Your Aviation Engine

There isn't one "best" aircraft engine model. The right choice depends on what you want to explore.

Modern jet aviation? Choose a turbofan.

Vintage aircraft? Go with a radial engine.

Helicopters? Explore a turboshaft.

STEM education? Start with the Mini Turbofan.

A serious mechanical challenge? Choose the 1/10 dual-spool turbofan.

This National Aviation Day, don't just look at the aircraft flying overhead. Take a closer look at the engineering inside it—and build a piece of aviation history for yourself.

Explore TECHING aviation engine models and find the one that matches your passion for flight.