Many Ultra aircraft use a _____________ stroke engine.

Many Ultra aircraft utilize a two-stroke engine due to several inherent advantages that align with their design and operational requirements. Two-stroke engines offer a simpler and lighter configuration compared to their four-stroke counterparts. This lightweight nature is particularly beneficial for Ultra aircraft, which often emphasize low weight and high performance for activities like gliding or aerobatics.

Moreover, two-stroke engines are known for their ability to produce power with fewer moving parts, which translates to reduced mechanical complexity and potentially lower maintenance needs. The power-to-weight ratio of two-stroke engines tends to be favorable, allowing these aircraft to achieve the desired performance metrics, such as speed and maneuverability, essential for Ultra aviation.

While four-stroke engines are common in other types of aircraft due to their efficiency and fuel consumption benefits, they tend to be heavier and more complex. Consequently, for Ultra aircraft, which prioritize lightweight and performance characteristics, the two-stroke engine is often the preferred choice.