Seagull Ultimate Biplane (20cc) 1.37m (54.3in)

The Ultimate Biplane SEA-389 is a compact, aggressive aerobatic aircraft designed for intermediate to advanced pilots seeking crisp control, thrilling manoeuvres, and a bold presence in the sky. With a wingspan of 1.37m (54") and traditional balsa/plywood construction, this ARTF model is strong, lightweight, and factory-covered for a clean, professional finish.

Engineered for 20–26cc petrol engines or a high-powered 6S–8S electric setup, the Ultimate offers lightning-fast roll rates, powerful verticals, and balanced control in every axis. The included cabane and interplane struts, functional ailerons on all four wings, and rugged gear make this model as durable as it is capable. Whether you're performing precision patterns or advanced freestyle, the Ultimate delivers energy and elegance in equal measure.

About the original:
The Ultimate biplane series was developed as a modern answer to classic aerobatic designs, blending vintage flair with cutting-edge performance. Known for its symmetrical wings, compact layout, and explosive flight characteristics, the Ultimate has become a favourite among sport and competition pilots alike.

Seagull Ultimate Biplane (20cc) 1.37m (54.3in) Key Features:

• Ultra lightweight, high quality balsa and ply construction.
• Beautifully covered in genuine Oracover film.
• Factory painted glass fibre engine cowl.
• Plug-in wing panels transport in one piece (top & bottom).
• Full hardware pack included.
• Ball link control surface connectors.
• Tough and forgiving dural undercarriage.
• Steerable tail wheel assembly.
• Colour-coordinated glass fibre wheel spats.
• Colour-matched plastic spinner.
• Wire braced tailplane.
• Includes electric motor mount conversion kit.
• Large canopy hatch for easy fuselage access.

What's in the Box:

• 1x Factory-finished fuselage assembly.
• 1x Factory assembled and covered 4-piece wing set.
• 1x Factory assembled and covered tail set.
• 1x Clear canopy moulding.
• 1x Pilot figure.
• 1x Undercarriage and wheel set.
• 1x Comprehensive hardware pack.
• 1x Tubular aluminium wing spar.
• 1x Comprehensive instruction manual.

Needed to Complete:

• 1x 20 - 26cc petrol engine, glow engine or Motor 2000, 270W, 85 - 110A ESC, 6s - 8s electric equivalent.
• 1x Propeller to suit chosen engine (17x8 - 19x10 Electric Prop).
• 1x 6-Channel computer transmitter and receiver combo.
• 6x Suitable high-quality digital servos.
• 1x Protective foam for radio system.

Manuals & Parts Explosions:

Seagull Ultimate Biplane (20cc) 1.37m (54.3in) Tech Specs:

• Approx. Flying Weight: 4.8kg / 10.6lbs
• Shipping Weight: 8.00kg / 17.64lbs
• Product Length: 1,510mm / 59.4in
• Product Wingspan: 1,380mm / 54.3in
• Product Wing Area: 64dm2 / 992in2

• Scale: 1:4.3
• Completion Level: ARTF
• Experience Level: Array
• Age Recommendation: 14+
• Recommended Usage Environment: Designated R/C model flying site
• Channels: 6
• Colour: Array
• Material: Balsa

• Brand: Seagull
• Part No: SEA389
• Barcode: 5051121274257
• Assembly Level: ARTF (Almost RTF)
• Power: Petrol
• Flying Style: Scale