700–800 Size ARF Electronic Combo
 
Complete power & control solution for Roban 700–800 helicopters
 
After more than one year of iterative testing, component matching, and flight validation, we developed a complete electronic package that allows our large-scale helicopters to perform at their full potential while keeping installation simple and reliable.
 
This ARF Electronic Combo contains everything required to bring a Roban 700–800 series helicopter airborne — except the battery and radio transmitter.
 
All components were carefully selected from the high-end segment and tested together as a system. The result is a balanced, powerful and price-efficient setup that eliminates guesswork and compatibility problems.
 
The system is delivered pre-configured and partially pre-soldered, allowing for fast installation and a clean wiring layout.
 
 
Key Features
 
• Complete electronics package for 700–800 size ARF helicopters
• Designed and validated through extensive flight testing
• High-power 12S (44.4V) power system
• Custom-selected 4730 brushless outrunner motor suitable for all Roban models
• 160A helicopter ESC with governor and soft-start
• Dual-power UBEC system for reliable servo supply
• High-torque digital servos (41kg·cm)
• Professional Rotorflight 3-axis helicopter gyro system
• Pre-wired components for fast installation
 
Every combo is factory tested to verify optimal performance.
 
 
Included Components
 
ESC & Power System
 
• 160A 12S (44.4V) Helicopter ESC
 – Integrated governor
 – Soft start for scale rotor systems
 
• Dual UBEC power system
 – 30A / 60A UBEC
 – Supports up to 12S input
 – Servo power rail 7.4V
 
Servos
 
• 4 × S5840 BLDC Servos
 – Torque: 41 kg·cm
 – Speed: 0.09s / 90°
 – Operating voltage: 7.4V
 
Motor
 
• 4730 500KV Brushless Outrunner
• Designed specifically for 12S helicopter applications
• Approx. 5 kW nominal power capability
• Single optimized KV value suitable for all Roban 700–800 models
 
Flight Control System
 
• Radiomaster NEXUS XR Rotorflight Gyro
• 3-axis helicopter stabilization system
• ELRS CRSF 2.4G support
• Designed specifically for Rotorflight helicopter control
 
(Combo also available without gyro.)
 
Wiring & Connectors
 
• Set of 10AWG extension wires (50 cm)
• AS150 anti-spark connectors (M + F)
• ESC & BEC pre-soldered for simplified installation
 
 
Battery & Radio
 
Not included:
 
• 12S LiPo battery (44.4V)
• Radio transmitter / receiver
 
 
Designed for Roban 700–800 Helicopters
 
This combo was engineered specifically for our large scale helicopters such as:
 
• AH-1 Cobra
• EC135 / H135
• AS365 Dauphin
• MD500 series
• other Roban 700–800 platforms
 
The selected motor KV, ESC power capability, and servo torque ensure optimal performance across the entire product range.
 
 
Why This Combo Exists
 
Large scale helicopters require a well-balanced electronics system. Overpowered components increase cost and weight, while undersized components compromise reliability.
 
This combo represents the result of over a year of testing, iteration, and real-world flight validation, delivering a solution that is:
 
• Powerful
• Reliable
• Easy to install
• Cost-efficient for customers