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The Nimbus 550 V2 builds on XLPower’s proven 550-class platform, engineered for demanding 3D and precision pilots.
Every component—from the strengthened rotor head to the compact upright servo layout—has been refined for smoother response, easier maintenance, and enhanced mechanical efficiency.
With full-size servo support, a new quick-release battery system, and optimized gear ratios, the Nimbus 550 V2 delivers high-power flight in a perfectly balanced mid-size airframe.
Designed for accuracy, durability, and maximum pilot confidence.
The Nimbus 550 V2 introduces XLPower’s innovative upright 120° servo layout, creating a more compact frame with precise, direct control response.
Its rotor head shares the same 1:1 control geometry as the Specter 700 V2, ensuring perfectly linear servo motion, reduced asymmetry, and a more connected, natural flight feel.
The system natively supports four full-size servos, with an optional mid-servo conversion kit available—but full-size servos are strongly recommended for the best performance, durability, and crash resistance.
Its 2.5 mm carbon upper side frames combined with a 7075 aluminum alloy chassis and rotor head deliver outstanding rigidity and crash resilience.
Designed as the strongest and most practical 550-class training helicopter, the Nimbus 550 V2 keeps spare parts affordable and easy to service.
A quick-release canopy system and optional rear battery quick-connect system allow battery swaps in under five seconds—no canopy removal needed.
As one of the lightest 550-class models on the market, it offers excellent 6S compatibility and explosive flight power.
The Nimbus 550 V2 features a fully CNC-machined 11 mm main gear built for strength and precision.
A dual one-way bearing hub ensures maximum torque transfer and smooth autorotation performance—eliminating the risk of one-way slippage or failure.
This advanced transmission design provides reliable, consistent power delivery even under extreme 3D loads.
The Nimbus 550 V2 features a tapered end-fitting design with an aluminum-core carbon tail control rod,
eliminating the need for traditional epoxy bonding for easier, safer, and more precise assembly.
Rod ends can be replaced quickly in the field—no curing time required—so you can be back in the air within minutes.
If damaged, only the carbon rod itself needs replacement, reducing maintenance costs while ensuring consistent tail control precision and long-term reliability.
Additionally, the tail rotor hub shares the same design as the Specter 700 V2,
utilizing a true teetering tail rotor system inspired by full-scale helicopter mechanics.
This configuration allows the tail grips to self-balance under load,
delivering stronger tail hold, lower vibration, and smoother, quieter operation even during aggressive maneuvers.
Full-Size Servo Integration
Supports full-size cyclic and tail servos for greater torque handling and precision under load.
1:1 Rotor Head Geometry
Shares the same geometry as the Specter 700 V2, providing perfectly linear, symmetrical, and predictable control response.
Dual One-Way Main Hub
High-grade bearings and dual one-way system ensure efficient torque transfer and reliable autorotation performance.
CNC 7075 Aluminum Rotor Head
Machined to extreme tolerances for maximum rigidity and zero slop—delivering sharp cyclic feedback and solid feel.
Lightweight Carbon-Fiber Frame
Reinforced 2.5 mm side plates and cross bracing provide exceptional torsional strength without excess mass.
Quick-Release Canopy System
Independent latch design allows the canopy to be attached or removed in seconds—making battery swaps and maintenance faster and easier.
Quick-Release Battery System
Bottom-mount tray enables rapid pack changes and easy CG adjustment. Optional rear quick-connect system allows plug-in operation without removing the canopy.
Teetering Tail Rotor Hub
True-scale teeter design for stronger tail hold, lower vibration, and smoother, quieter tail performance.
Simplified Maintenance
Easy access to main gear, servos, and electronics for quick setup, servicing, or upgrades.
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 &
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
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
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
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
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
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 &
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
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.

| Vendor: | XLPower Heli |
| SKU: | XL55V2K03 |
| Barcode: | |
| Availability: | Out Of Stock |
| Product Type: | Helicopter Kit |
| Weight: | 12.0 lb |
There was no manual included with the kit. I had to go to the XL website to download a copy, then print it. The kit looks great.
This is my 3rd nimbus having 2 nitros I wanted the electric version also. Was not disappointed, excellent kit and they fly very well.
Easy to build and I appreciate design is carefully thought through. It flys silky smooth and great for beginners or under a skill pilot it can handle any thing you throw at it. A 550 size heli that flies like a 700. You won’t be disappointed.
The head did not fit on the main shaft. After consulting with my friends who have the same Heli, I contacted Heli Direct. Patrick sent me a new head in a couple days. Problem solved. I have built over 90 R/C Helicopters and never had a part that didn't fit.
The Heli build was easy, and it flew well.
Amazing product, shipping was packaging was good. Got up in the air , flys amazingly
The kit is amazing quality for the money and it needs to be judged for what it is. The kit was designed to be a practice machine for hardcore 3D pilots that could be crashed and fixed quickly and for less money than other brands. That being said, the parts quality, fitment, and hardware are amazing. The canopy is very nice too, the quick connect/magnet system should be the standard with every manufacturer these days. Top quality materials are used. The company is able to deliver these kits at such a good price point because they are saving money elsewhere. You don’t get fancy packaging and a great manual like SAB kits. There aren’t as many complicated design features like a belt tensioning system, turnbuckles for each cyclic servo, or any cool little free tools. What you get is a well designed, easy to maintain, simple to build and fix machine that is designed to shred. It’s a baby sister to the Specter V2 and flies like it, giving you a familiar feel and visual experience. I would recommend XGuard magic dampers (as with any rigid head POM dampened system) to rid the machine of any low RPM vibrations during spool up/spool down. I haven’t don’t any autorations on the machine yet, but there are a few videos on YouTube. To me, it looks like the best autorotating 550 size machine yet.
Pros- machine quality, hardware quality, simplified design, PARTS COST, ease of build, flight performance, ability to run up to 580mm main blades, rigid frame, large battery compartment able to fit up to 8s packs, inexpensive 650 stretch kit available, hang time on autorations (stellar for the 550 class), nice canopy with magnets and quick connect. Let’s not forget the 1:1 ratio for the head geometry! You get a nice, precise, predictable/natural feel that’s easy to adapt to, especially with Azure Power blades.
Cons- digital manual (does ANYBODY like those?!) instead of nice quality paper manual. The manual is pretty vague; if this was your first kit build you would be left guessing on a few details. The canopy for both the nitro and the electric are the same, so there is a hole for the starter wand on the electric model. This doesn’t actually bother me, I think it’s a clever cost-reducing tactic, but some may not like it. There is only one option for head dampening included in the kit, and the POM dampeners needed a tiny bit of de-burring to remove some plastic left over from manufacturing. The main gear and tail belt may be mechanically sound, but I prefer the beefy look of thicker main gears and wider tail belts found on other models. There is only one battery tray included and you don’t get real battery straps that have a buckle to leverage the strap through, instead you get a wider version of their hook a loop tape roll to secure the packs to the battery tray. The Velcro that’s included for mounting batteries to the trays is not awesome. Just buy real, heavy duty Velcro brand tape. No turnbuckles for cyclic servos, although the swash-to-blade grip turnbuckles seem like they would work fine if you were to buy more and use those. Ironically, they are not that inexpensive at $10 for the set of two, meaning you would need two sets to get the 3 turnbuckles you need for the servos.
My biggest gripe is that the tail boom is not keyed for alignment. This would be such an easy feature to incorporate- just cut a slot
In the boom that aligns with the tail fin mounting holes and add a small block of material to inside of one of the boom mounts. It would make belt tensioning so much easier- I hate trying to square up a boom while pulling on it to get the correct belt tension, and simultaneously needing a magical third hand to tighten the hardware.
If XLPower would address these small issues, the kit would be even more amazing. Overall I would highly recommend the kit. If you’re aspiring to be a competition pilot (or just crash a lot learning or pushing the limits) or just want a really solid modern machine with great value in parts cost and parts availability, I would say this is kit to get.
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