Why does a star engine for a fighter have to be an odd number of cylinders?

A fighter's star engine does not necessarily have to be an odd-numbered number of cylinders. Generally speaking, engines with even-numbered cylinders are usually less powerful, because when the engine with even-numbered cylinders is running, the pistons in the two opposite cylinders will move synchronously, resulting in greater vibration. In contrast, an engine with an odd number of cylinders can cancel out some of the vibrations due to the staggered cylinders, making the engine more stable.

Therefore, in order to ensure optimal engine performance and stability, an odd number of cylinders were chosen for the star engines of many fighters.

However, this is not absolute. Some fighter jets use engines with even a number of cylinders in order to achieve higher performance. For example, some modern fighters use afterburner turbofan engines with an even number of cylinders, which can provide higher thrust for a short time.

Therefore, whether a fighter's star engine must have an odd number of cylinders depends on the specific design needs and performance requirements.

Each row of a star-piston engine for aviation is indeed an odd number of cylinders. For example, the engine of the Yun-5 is 9-cylinder.

The reason is that the pistons in the two cylinders on the top move synchronously, and the vibration is large.

Are there any aircraft engines with even cylinders? Some. However, engines with even cylinders usually have fewer cylinders and less power. However, due to the current prevalence of turboprop engines, there are not many high-power engines that use piston types.

Summary. Hello, glad to answer for you. The pro-star engine has the advantage of being an odd-numbered star engine because there are no 4 cylinders

High reliability, light weight, good rigidity, great potential for power improvement, good maintenance and survivability; Disadvantages of the star engine: the windward area is large, resulting in large resistance during flight. Generally, the number of cylinder groups of the star engine is an odd number, there are 5 cylinders, 7 cylinders, 9 cylinders, in order to increase the power, it can also be superimposed in multiple rows, and the multiple cylinder groups are arranged in several rows, up to 4 rows of 7 cylinders, and the Hornet R-4360 of Puhui Company reaches 28 cylinders.

Hope mine can help you! Do you have any other questions?

Hello, glad to answer for you. The pro-star engine is because there are no 4 cylinders and is an odd number of stupid star engine advantages: high reliability, light weight, good rigidity, power improvement potential, maintenance and survivability are also good; The star-shaped engine lacks envy gear points:

The windward side has a large area, resulting in high drag during flight. Generally, the number of cylinder groups of the star engine is an odd number, there are 5 cylinders, 7 cylinders, 9 cylinders, in order to increase the power, it can also be superimposed in multiple rows, and the multiple cylinder groups are arranged in several rows, up to 4 rows of 7 cylinders, and the Hornet R-4360 of Puhui Company reaches 28 cylinders. Hope mine can help you!

Do you have any other questions?

What is the difference between 4 cylinders and 5 cylinders, the number of cylinder groups of the general star-type engine is an odd number, there are 5 cylinders, 7 cylinders, 9 cylinders, in order to increase the power, it can also be superimposed in multiple rows, and the banquet lacks multiple cylinder groups into several rows, at most it can be argued to 4 rows of 7 cylinders, and the Bumblebee R-4360 of Puhui Company reaches 28 cylinders.

There is no 4-cylinder oh pro.

Only 5 7 9 cylinders.

Personally, I think it's because of the fact that if you have an even number, you will have two cylinders facing each other, which seems to be prone to problems. That's my guess, though.

See it's singular? I've flown in even numbers.

Like the TB-200, the horizontally opposed engine has two rows of two cylinders in each row. The same is true for the C-172, which spans the twin Simonoel PA44s, and each engine is also 2 cylinders per row.

Summary. Why doesn't the star engine have a 4-cylinder pro, hello Since each cylinder on the star engine has its own head, it is impractical to use a multi-valve valve system on the star engine. As a result, almost all star engines use a dual-valve pushrod valve train, which results in less power for a given displacement compared to a multi-valve in-line engine.

Why doesn't the star engine have a 4-cylinder pro, hello Since each cylinder on the star engine has its own head, it is impractical to use a multi-valve valve system on the star engine. As a result, almost all star engines use a two-valve pushrod valvetrain, which can result in less power for a given displacement than a multi-valve in-line engine.

What is the difference between a 4-cylinder and a 5-cylinder star engine?

The four-cylinder engine can only do work once after each cylinder rotates the crankshaft 720 degrees, and the crankshaft rotates 180 degrees to do work once. The 5-cylinder engine allows the gas plexus cylinder to overlap the work, so the power performance is very good, and the disadvantage is that the fuel consumption is high and the low torque performance is not ideal. Talking about Zheng Heng, there are not many car companies that use 5-cylinder engines.