description Van's RV-4 Overview
The Van's RV-4 is an American tandem two-seat, single-engine homebuilt aircraft designed by Richard VanGrunsven for amateur construction from kits. First flown in August 1979, it was developed as a larger, two-seat derivative of the single-seat RV-3 to offer improved performance and aerobatic capabilities. Constructed primarily from aluminum, the monoplane is designed for pilots seeking a versatile, stable aircraft suitable for both cross-country cruising and aerobatic training.
help Van's RV-4 FAQ
Is the Van's RV-4 a good first homebuilt aircraft project?
The Van's RV-4 is generally considered an intermediate-to-advanced homebuilt project, as it is a two-seat tandem aircraft with relatively involved fuselage and wing assembly. Many builders recommend starting with a simpler kit such as the RV-12 for a first build, though the RV-4 remains popular for experienced builders seeking a compact aerobatic design.
What engine does the Van's RV-4 typically use?
The Van's RV-4 is typically powered by a Lycoming O-320 or O-360 piston engine, producing between 150 and 180 horsepower. The RV-4 airframe is designed around these common Lycoming powerplants, which are widely available both new and as overhaul units from removed service aircraft.
Is the Van's RV-4 rated for aerobatic flight?
Yes, the Van's RV-4 is designed for aerobatic flight and is rated for maneuvers including loops, rolls, spins, and hammerheads. Its light airframe, responsive controls, and favorable power-to-weight ratio have made it a popular choice among aerobatic enthusiasts and sport pilots.
How is the RV-4 different from the earlier RV-3?
The RV-4 was developed by Richard VanGrunsven as a two-seat evolution of the single-seat RV-3, and it first flew in August 1979. The RV-4's tandem two-seat design made it far more practical for training and shared flying, and it became one of the most popular kit aircraft designs in the Van's Aircraft lineup.
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