Compass Model 550 "Ultimate Edition" Flybarless Helicopter Kit w/Motor & CF Blades (Red)

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This is the Compass Model 550 "Ultimate Edition" Flybarless Helicopter Kit, with a 10 Pole 1150kV Motor and Carbon Fiber 1250mm Blades.

The 550 Ultimate is the consistent further development of the 6HV Ultimate. The details make the model maintenance- and assembly-friendly or are for a better flight-performance. The 550U has got a third bearing block and the screws of the arm links are M4 diameter. Aluminum brackets are mounted into the carbon side frames so the assembly of the servos is fast and easy and the ESC got his own mount. Some fixing points for the wires are milled into the redesigned two-part side frames. This reduces the cost in case of an crash and makes the helicopter easy to fix. The tail is widely used from the 7HV Ultimate and gets an aluminum tail control arm, a 6mm tail shaft, reinforced tail blade grips and a stainless tail center hub. The most distinctive features are the updated canopy inspired from the design of the Warp360 and the 25mm tail boom. The automatic belt tensioner first used in the 7HV is also used in the 550 Ultimate. Many more details like the notches for the velcro tapes, the head button, the canopy quick-releases, a updated motor mount, the CF tail control rod and a redesigned high-quality, helical delrin main gear make a perfect overall package. 


  • Designed as a flybarless-model
  • One of the most light-weight helis in the size
  • Precise ECCPM 120 Swashplate
  • Aluminum rotorhead and tailrotor
  • Rugged CF chassis
  • Extreme solid, modulus 1 helical main gear
  • Easy maintenance, inexpensive parts
  • Battery-size for parallel use in 700 size helis
  • High-quality painted fiberglass canopy (available in different colors)
  • Setup with or without boom supports

1250 mm (550mm Blades)
Rotor Blades: 515 - 560mm
Pinions: 11T, 12T, 13T, 14T
Gear Ratio: (12T) 9.6 : 1 : 4.36
Flying Weight: ca. 3.00 - 3.4kg
Type of motor: Brushless, 10Pole, 1150KV
Battery-size: LiPo mit 6s 4500-6000mAh ab 25C
ESC: 80A - 120 A Brushless HV


  • Atom 550 Ultimate
  • CFK Rotor-Blades 550mm
  • Motor 1250 KV
  • 12T Pinion
  • Blade-Caddy

This product was added to our catalog on September 18, 2014.

Jeffrey Myers
Verified Owner
Monday, Aug 24 2015 (about a year ago)
Compass Model 550 "Ultimate Edition" Flybarless Helicopter Kit
Got the heli from Amain in 3 work days like clockwork, the manual is pretty rough, if u have built few it's not a big deal, but the heli itself is awsome, the machine work is good as a goblin, parts fit was good, it flies very light, quick on cyclic, and is also as quiet as my goblins,tons of power on stock motor, I'm sold on compass products, even though the manuals are pretty bad, guess I'll get the chronos now