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GAUI NX4 FBL Nitro Kit (.50 Version)

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Product Description

GAUI NX4 FBL Nitro Kit (.50 Version)


  • ◎First production nitro model of its kind. 425mm (480mm blades with the longer optional boom) Nitro powered by GAUI 37 Engine.(This particular kit can run .50 ~ .55 engines for high performance 3D flight..)
  • ◎Extremely easy to tune engine.
  • ◎220cc/9oz fuel tank provides 6.5 min+ flight times ,over 50% more flight time Compared to 4 min avg. E-Heli times.
  • ◎Incredible fuel economy allowing around 15 flights/gallon of fuel.
  • ◎Excellent power to weight ratio similar to most .90 - 105 sized Nitro Helicopters.
  • ◎Simple, robust, reliable frame construction.
  • Carbon side frames same part # both L & R.
  • ◎Plenty of frame space for mounting electronics.
  • ◎“Electric feeling” gear ratio-model provides excellent low-end torque and is very forgiving for inexperienced pilots.
  • ◎Many many parts shared with GAUI X4II and GAUI X5.
  • ◎Direct Servos -> Swash for 120-degree CCPM providing extremely easy setup and operation. 
  • ◎Adjustable servo mounting blocks for precise CCPM operation.
  • ◎Accommodates “Mini” sized servos.
  • ◎8mm Main Shaft. 6mm Head Axle (spindle).
  • ◎Stylish hand painted (airbrushed) Fiberglass (FRP) Canopy.
  • ◎Designed by GAUI R&D Department & Bobby Watts.




Download PDF Manual: CLICK HERE




Suitable Model for NX4 Series  Standard   Optional Accessory  

Main blade size: 425~450mm (480mm blades with the longer optional boom)
Tail blade size: 70~86mm
Main Gear ratio: 7.06: 1 (120t main gear 17t pinion)
Tail drive ratio: 4.36: 1 (61 / 14)
Fuel tank: 220cc / 9oz (176g)
Servo size: “Mini” (Example , BK DS5001HV for cyclic, BK DS5005HV for tail)

Delivery content: -#313450-FRP painted canopy
Not included:

- Servos
- .50 Engine ( .50/.55 can be used for crazy power with the optional GAUI engine mount(INCLUDED IN THIS KIT))
- Nitro Muffler
- GAUI Governor
- Automatic glow starter

- Misc Nitro Accessories
- Auxiliary fuel tank set (60cc 2.1oz)
- GAUI Mini VBar / Microbeast / FBL Controller System

-#313500-NX4 CF Tail Rotor Blade Set(77mm) x1
-#313600-CF main blades (425L-CFA) x1


Also Not included

3x CCPM Mini Servos, 1x Mini Tail Servo, 1x Mini Throttle Servo, 1x GAUI FBL System= Ikon, Microbeast, V-Bar, etc....

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