XL55NK02 – XLPower Nimbus 550 V2 Nitro Kits

The new system features multiple engineering upgrades over the previous version:

🧩 All-new pre-balanced clutch assembly — factory balanced to minimize vibration and extend bearing life.
⚙️ Redesigned extended engine shaft — provides higher axial rigidity and smoother transmission, greatly reducing clutch stack distortion under load.
🔧 Refined starter coupling structure — starter cup no longer sits inside the bearing, preventing loosening during operation and improving long-term reliability.
🎯 Improved concentricity — upper clutch bearing alignment has been significantly enhanced for a smoother, more efficient drivetrain.
🧰 Optimized taper angle — allows easier installation and secure clutch engagement without excessive tightening.
🔄 Universal compatibility — fully compatible with both OS and YS engines, requiring no modification.
⚖️ Recommended tightening torque — 16–18 Nm for optimal locking force and reliability.
Together, these upgrades result in a drivetrain that runs quieter, stays cooler, and offers unmatched precision and durability — a true step forward from the original Nimbus 550 Nitro.

Machined from high-strength 7075-grade aluminum, the rigid rotor head provides maximum stability and precise control response. Optimized geometry and high-precision linkage deliver perfectly linear cyclic feedback, while the 1:1 control geometry ensures equal movement in all directions and a consistent, balanced feel — ideal for both aggressive 3D and precise F3C flight.

Easy connect canopy locks removing the need for safety pins with a much easier way to remove and mount the canopy.

DAMPENING SYSTEM &

TAIL HUB

Precision CNC-machined from aircraft-grade aluminum for exceptional balance and durability. The teetering tail rotor system, shared with the Nimbus 550 V2 electric version, delivers stronger tail-hold performance, reduced vibration, and improved parts compatibility for easier maintenance and upgrades.

Assembly of the

TAIL HUB

The tail hub uses a tapered collet connection identical to the Specter 700, effectively reducing vibration and simplifying maintenance — in most crash cases, only the tail shaft needs replacement, costing just a few dollars.

servo layout

GEOMETRY

Clean, direct servo placement with optimized linkage geometry delivers mechanical efficiency, equal throw on all axes, and a simplified setup for consistent response throughout the entire flight range. A one-piece 7075 aluminum bearing block and servo mount form the structural backbone of the frame, providing exceptional drivetrain rigidity and stability even during the most aggressive maneuvers.