TECHNICAL SPECIFICATIONS
Length w/o main blades: 1,180 mm
Overall height: 320 mm
Frame width: 206 mm
Frame weight: 1,480 g
Main shaft diameter: 10 mm
Feathering shaft diameter: 8 mm
Main gear: 106 T
Autorotation pulley: 60 T
Tail pulley: 13 T
Tail ratio: 4.6 : 1
Recommended main blades: 550 – 570 mm
Battery tray size: 290 × 53.5 × 66 mm
Motor class: 4025 – 4035
ESC rating: 100 – 130 A
Servo size: Full-size cyclic and tail
Power system: Electric, 6S – 12S (depending on setup)
Motor Mount &
CENTER-OF-GRAVITY DESIGN
The motor mount is positioned close to the helicopter’s center of gravity for optimal balance and handling. An integrated support bearing on the pinion stabilizes the motor shaft, ensuring precise gear mesh, reduced vibration, and extended bearing life—essential for high-power electric setups.
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. Aone-piece 7075 aluminum bearing block and servo mountform the structural backbone of the frame, providing exceptional drivetrain rigidity and stability even during the most aggressive maneuvers.
Advanced
ROTOR HEAD SYSTEM
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 the1:1 control geometryensures equal movement in all directions and a consistent, balanced feel — ideal for both aggressive 3D and precise F3C flight.
Dual one-way precision
FULL CNC STRENGTH
The Nimbus 550 V2 features a fully CNC-machined main gear with an ultra-rigid 11 mm structure for exceptional strength under extreme loads.
Its dual one-way bearing system delivers superior torque capacity and consistent power transfer—eliminating the risk of one-way slippage or failure.
Every climb, every reversal — driven with absolute confidence by a transmission built for performance.
Tail Control
ROD SYSTEM
The carbon tail control rod features a tapered end-fitting design with an aluminum-core shaft.
This patented system eliminates the need for traditional epoxy bonding, making assembly easier, safer, and more precise.
It allows quick field replacement of the rod ends—no more waiting hours for epoxy to cure—so you can get back in the air faster.
In case of damage, the carbon rod itself can also be replaced independently, reducing maintenance cost while maintaining long-term reliability and consistent tail control performance.
One-Piece
CNC TAIL CASE
A single solid aluminum tail case increases rigidity and ensures perfect gear mesh alignment. The one-piece design improves strength, reduces vibration, and simplifies maintenance compared to multi-part housings.
DAMPENING SYSTEM &
TAIL HUB
Precision CNC-machined from aircraft-grade aluminum for exceptional balance and durability. Theteetering 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 atapered collet connectionidentical 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.
