H-KING MX2 Extreme 4S EP0 - User Manual

The H-King MX2 Extreme 4S EPO 3D Airplane is a high-performance radio-controlled aircraft designed for experienced pilots seeking an agile and durable model for extreme 3D aerobatics. This Plug-N-Fly (PNP) version comes largely pre-assembled, requiring minimal setup before flight.

Function Description

The H-King MX2 is engineered for precision 3D performance, offering straight, precise flying capabilities. It's a highly capable aerobatic model that allows pilots to perform a wide range of maneuvers, from basic to extreme 3D. The aircraft is designed to be lightweight and durable, utilizing EPO foam construction for resilience against crashes and ease of repair. Its design, inspired by full-scale aerobatic aircraft, ensures excellent flight characteristics and a visually appealing presence in the air. The model is equipped with a powerful brushless motor, a compatible electronic speed controller (ESC), and servos, making it ready for a 4S LiPo battery.

Important Technical Specifications

• Wingspan: 1270mm
• Length: 1210mm
• Materials: EPO foam
• Flying Weight: 1240g (excluding battery)
• Battery Recommendation: 2200mAh 4S (14.8V) 45-90C LiPo w/XT60 (not supplied)
• Flight Time: Approximately 5 minutes with a 2200mAh battery
• Propeller: 13x4
• Radio: 4-channel or more (not supplied)
• ESC: 60A brushless with 4A switching BEC
• Motor: 3720-900KV brushless
• Servos: 4 x 13g high-speed, metal-geared digital servos
• Landing Gear: Carbon fiber landing gear with wheel spats and wheels
• Control Surfaces: Ailerons, elevator, rudder
• Construction: Foam with carbon fiber wing joiner rod and landing gear

Usage Features

The H-King MX2 is designed for pilots with intermediate to advanced flying skills, particularly those interested in 3D aerobatics.

• Plug-N-Fly (PNP) Convenience: The model comes with the motor, ESC, and servos pre-installed, significantly reducing assembly time. Pilots only need to add their own receiver, battery, and transmitter.
• Extreme 3D Capability: The aircraft's design and powerful propulsion system allow for aggressive 3D maneuvers, including tumbles, rolls, loops, knife-edge flight, and more.
• Durable EPO Construction: EPO foam is known for its durability and ease of repair, making the MX2 resilient to minor crashes and impacts, which is beneficial for learning new aerobatic maneuvers.
• High-Performance Components: The pre-installed 3720-900KV brushless motor and 60A ESC provide ample power for vertical performance and quick acceleration. The metal-geared digital servos offer precise and responsive control.
• Adjustable Control Settings: The manual provides guidance on setting up travel settings for control surfaces (ailerons, rudder, elevator) and recommends exponential rates for smoother control, especially for 3D flight. Recommended expo settings are 20% for aerobatic flight and 60-70% for 3D flight.
• Center of Gravity (CG) Recommendation: A specific CG range (95mm to 100mm from the leading edge of the wing) is provided to ensure stable and predictable flight characteristics.
• Easy Transport: The main wing is removable, making the aircraft easier to transport to and from the flying field.

Maintenance Features

Maintaining the H-King MX2 involves routine checks and repairs to ensure safe and optimal performance.

• EPO Foam Repair: Minor damage to the EPO foam can often be repaired using foam-safe CA glue or epoxy. Spare parts are available for more significant damage.
• Component Replacement: All major components, including the motor, ESC, servos, propeller, and landing gear, are replaceable. Spare parts such as the fuselage, main wing set, rudder, horizontal stabilizer, propeller, carbon fiber wing joiner, spinner, canopy hatch, carbon fiber landing gear, cowling, and motor are available for purchase.
• Pre-Flight Checks: Before each flight, pilots should perform a thorough pre-flight check, including:
  • Verifying battery charge and secure connection.
  • Checking all control surfaces for free movement and correct direction.
  • Ensuring all linkages are secure and free from binding.
  • Inspecting the propeller for damage and ensuring it is securely fastened.
  • Confirming the radio system is functioning correctly and has good range.
• Propeller Maintenance: Regularly inspect the propeller for nicks, cracks, or damage. A damaged propeller can cause vibrations and reduce performance. Replace as needed.
• Linkage Inspection: Check pushrod linkages for any looseness or wear. Ensure the ball links and clevises are securely attached.
• Motor and ESC Cooling: Ensure proper airflow to the motor and ESC, especially during aggressive flying, to prevent overheating.
• Storage: Store the aircraft in a cool, dry place away from direct sunlight to prevent foam degradation and damage to electronics.

The H-King MX2 Extreme 4S EPO 3D Airplane offers an exciting and rewarding flying experience for pilots ready to explore the world of extreme aerobatics with a durable and high-performing model.