About the HARMON JOHN M RV-4
The Van’s Aircraft RV-4 is a two-seat, single-engine, low-wing aircraft renowned for its exceptional aerobatic capabilities and efficient performance. It was developed by Richard VanGrunsven and first flew in 1979. The RV-4 was introduced as a follow-up to the single-seat RV-3, representing VanGrunsven's foray into the expanding market for homebuilt aircraft that could accommodate two occupants while retaining superior handling and performance characteristics.
Van’s Aircraft, founded by Richard “Van” VanGrunsven, has a profound legacy of providing high-performance, kit-built aircraft, and the RV-4 holds a special place in that history. The initial motivation behind the RV-4's development was to create an aircraft that could cater to both recreational flying and sport aerobatics, all while being accessible to the amateur builder. This motivation was aligned with the rising popularity of homebuilt aircraft in the late 20th century, driven by enthusiasts looking for more performance at a fraction of the cost of certified aircraft.
Key Features and Capabilities
The RV-4 is constructed primarily from aluminum, which offers a good balance between durability and weight. It features a side-by-side seating arrangement, which enhances the flying experience by allowing for an instructor or a passenger to accompany the pilot. Compared to its predecessor, the RV-3, the RV-4 offers increased stability and payload capacity, making it suitable for longer cross-country flights in addition to its aerobatic functions.
One of the key benefits of the RV-4 is its versatility. It is well-regarded not only for its aerobatic prowess but also for its relatively low build and operating costs. The aircraft can be powered by a variety of engines, typically in the 150-180 horsepower range, providing a good balance of power and efficiency.
Market Position and Use Cases
By the end of its production cycle, the RV-4 had firmly established itself as a beloved model in the homebuilt aircraft community, paving the way for further developments in the RV series. Production of the RV-4 has largely ceased as more advanced models, such as the RV-7, have taken center stage, but it remains a popular choice among aviation enthusiasts for its robust design and enjoyable flying characteristics.