GOOSKY Legend RS5 Ultra 560 Class Electric RC Helicopter Kit

What Is the GOOSKY Legend RS5 Ultra?

The GOOSKY Legend RS5 Ultra is a 550/560-class high-performance electric RC helicopter kit designed for experienced pilots who want a rigid, precise, and responsive machine for 3D flying. Built as an evolution of the RS5 platform, it combines CNC-machined 7075 aluminum construction, a reinforced rotor system, oversized swashplate, and a belt-driven tail. This version is supplied as an unassembled kit without main or tail blades, allowing pilots to select their preferred motor, ESC, servos, flight controller, radio system, and rotor blades.

Built for 3D Flying

The GOOSKY RS5 Ultra is designed around a 560mm main blade and a 550/560-class airframe. Its rigid frame and reinforced rotor system are intended to maintain accurate control during fast cyclic inputs and aggressive 3D maneuvers. The oversized swashplate provides a direct and precise feel at the controls, while the larger drivetrain components handle the demands of a high-power electric setup. For pilots who enjoy aerobatics, inverted flight, fast cyclic maneuvers, and precision 3D flying, the RS5 Ultra provides a serious platform without moving into the much larger 700-class category.

CNC 7075 Aluminum Construction

The GOOSKY RS5 Ultra uses CNC-machined 7075 aluminum components in key mechanical areas. 7075 aluminum provides a high strength-to-weight ratio and is commonly used where rigidity and precise machining are important. The helicopter also uses high-strength 12.9-grade hardware and precision bearings throughout the drivetrain. The reinforced structure helps keep the rotor system and drivetrain aligned under load, which is particularly important when flying at higher headspeeds or performing aggressive maneuvers.

Reinforced Main Rotor System

The GOOSKY RS5 Ultra uses a 12mm main shaft and an 8mm feathering shaft. The rotor head and swashplate are designed around the 560mm blade platform, giving the helicopter a strong mechanical foundation for fast cyclic response and precise control. The one-piece 6mm tail shaft adds rigidity to the tail assembly while reducing the number of separate components in the tail drive.

Belt-Driven Tail

The tail rotor is driven through a 6mm wide belt. The tail system uses a 75T front pulley and 16T tail pulley, with a tail ratio of 4.6875:1. The tail rotor diameter is approximately 259mm when paired with the specified 95mm tail blades. A belt-driven tail keeps the transmission layout simple and provides an efficient way to transfer power to the tail rotor.

550/560-Class Power Platform

GOOSKY recommends a 4025 1100KV brushless motor and a 150A 6S ESC for the RS5 Ultra. The recommended battery is a 6S 5000–5500mAh LiPo pack. The battery tray provides approximately 245 × 52 × 60mm of usable space. Because this is a helicopter kit, electronics are not pre-installed. Pilots select the motor, ESC, servos, flybarless controller, receiver, and transmitter according to their preferred setup.

Servo Compatibility

The GOOSKY RS5 Ultra is designed for full-size cyclic and rudder servos. Mini-size servos are not compatible with the RS5 Ultra configuration. This is important to confirm when selecting electronics before starting the build. The full-size servo requirement is intended to provide the torque and response required for a high-performance 550/560-class 3D helicopter.

Quick-Access Battery Layout

The slide-in battery tray is positioned beneath the main frame and provides approximately 245 × 52 × 60mm of space. The slide-in arrangement makes battery installation and removal straightforward while keeping the pack close to the center of the helicopter.

Key Features at a Glance

• 550/560-class airframe — 560mm main blade, approx. 1272mm main rotor diameter
• CNC-machined 7075 aluminum — high strength-to-weight ratio in key mechanical areas
• 12.9-grade high-strength hardware throughout
• Precision bearings throughout the drivetrain
• 12mm main shaft / 8mm feathering shaft / 6mm tail shaft
• Oversized swashplate — direct and precise cyclic control feel
• Reinforced rotor head
• Belt-driven tail — 6mm belt, 4.6875:1 tail ratio
• 107T main gear — 8.917:1 ratio with 12T pinion / 8.231:1 with 13T pinion
• Full-size cyclic and tail servos required
• Slide-in battery tray — 245 × 52 × 60mm
• Unassembled kit — no blades, no electronics included

Product Specifications

Kit Contents & What Is Not Included

This version includes the GOOSKY RS5 Ultra mechanical helicopter kit. The following are not included and must be purchased separately:

• Main rotor blades (560mm)
• Tail rotor blades (95mm)
• Motor (recommended: 4025 1100KV brushless motor)
• ESC (recommended: 150A 6S brushless ESC)
• Cyclic servos (full-size)
• Tail servo (full-size)
• Flybarless flight controller
• Receiver
• Battery (recommended: 6S 5000–5500mAh LiPo)

Please confirm the compatibility of all electronics and rotor blades before assembly.

Who Is the GOOSKY RS5 Ultra For?

The RS5 Ultra is not an RTF helicopter. It is a build kit intended for pilots who are comfortable selecting and installing their own electronics and setting up a flybarless helicopter. It suits:

• 3D RC helicopter pilots
• Experienced RC hobbyists
• Pilots upgrading from smaller helicopters
• High-response aerobatic flying
• Custom 6S helicopter setups
• Pilots who prefer to choose their own electronics

Frequently Asked Questions

Does the GOOSKY RS5 Ultra include electronics?
No. This is a mechanical kit only. Motor, ESC, servos, flybarless controller, receiver, and battery must all be purchased separately.

Does it include rotor blades?
No. Main blades (560mm) and tail blades (95mm) are not included and must be purchased separately.

What motor does the GOOSKY RS5 Ultra use?
GOOSKY recommends a 4025 1100KV brushless motor with a 150A 6S ESC and a 6S 5000–5500mAh LiPo battery.

Can I use mini servos?
No. The RS5 Ultra requires full-size cyclic and tail servos. Mini-size servos are not compatible.

What is the main gear ratio?
8.917:1 with a 12T motor pinion, or 8.231:1 with a 13T motor pinion. Tail gear ratio is 4.6875:1.