Rotary Engine Advantages and Disadvantages

Rotary engines are alternatives to piston engines. They have different mechanics than the latter, but, like piston engines, they are internal combustion. The chambers change in sizes as the rotor rotates around. Rotary engines are to be considered as advances in engine technology relative to those that are older. However, there are advantages and disadvantages to rotary engines.

characteristics

Rotary engines have some different characteristics that set them apart from other engines. They do not have pistons. Piston engines have a compression and ignition system, on the other hand, a rotary engine does not work like that and carries out these tasks in a single rotation. It features a triangular rotor rotation system that spins around and completes its tasks in one motion.

Advantage

Simplicity is an advantage of the rotary engine. It has far fewer parts than piston engines and still has more power comparatively. For example, the RX8 13B is a 1.3-liter rotary engine and yet produces enough power to compete with the Corvette’s 6.0-liter piston engine. In this example, the 1.3-liter rotary engine produces 232 horsepower, compared to 178 horsepower for the 6.0-liter Corvette piston engine.

Limited catastrophic failures

Piston engines are more likely to experience catastrophic failure than a rotary engine. A piston can fail and cause a lot of problems for a piston engine. Rotary engines, for their part, can also lose power, but at a much slower rate than the piston engine. However, even when rotary motors lose power, such motors continue to produce limited power. Rotary engines will continue to run at a much lower rate up to a certain point.

Disadvantages

Rotary engines have a major disadvantage when it comes to gas mileage, as they use more gasoline than piston engines. They also burn more oil comparatively than piston engines. This problem is not by default, but by design. Part of the reason is that the rotary engine is designed to mix a small portion of oil with gas for lubrication purposes. A typical rotary engine achieves an average mileage of about 25 miles (40.23 km) per gallon. It is also important to note that rotary engines could not run on diesel fuel due to their design.

The seal problem

Rotary engines tend to have more seal problems than piston engines. This problem occurs more frequently, especially in colder regions. It is not very clear why this is the case. There is also a problem with the cost of some spare parts. Repairs can be more expensive on a comparative basis. Also, there are fewer dealers who are certified to fix rotary engines, and regular dealers for piston engines do not handle such engines.

by Abdullah Sam
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