BiSide – The Perfect First Step into F3A Biplanes
Designed by F3A master BJ Park, the Ultimate BiSide brings biplane performance to a wider range of pilots with a refreshing blend of innovation and approachability. It features a distinctive swept-wing design—refined from BJ Park’s experience in advanced aerospace projects—that increases aerodynamic efficiency and enhances rudder authority without the typical "on/off" biplane behavior.
 
Unlike more extreme designs like the Ultimate Exceed, the Ultimate BiSide is incredibly natural to fly. Its rear canopy and overall geometry deliver a more forgiving and intuitive flight experience, especially for pilots transitioning from monoplanes. The control response is smooth and proportional, making it ideal for unknowns, precise lines, and graceful maneuvers.
 
This model is not only easy to set up and trim, but also holds its own against top-tier F3A aircraft—especially when you consider its competitive price point. Whether you’re aiming to compete or simply enjoy refined aerobatic flying, the Ultimate BiSide offers unbeatable value and performance.
 
Highlights:
Swept-wing and rear canopy design for natural, intuitive flight feel
Outstanding knife-edge stability and control
Smooth handling in crosswinds up to 13 m/sec
Ideal CG range for fine-tuning performance
Easier to adapt from monoplane flying
Fully competitive—at a friendlier price
 
A perfect first biplane that doesn’t compromise on performance. Highly recommended for pilots looking for smooth handling, strong unknowns capability, and an easy setup.