Synergy 516 Flybarless Electric Helicopter Kit

Out Of Stock Online
You may back order this item and it will ship when it arrives.
FREE Shipping Eligible! Learn More
Read Reviews
Write a Review

Please Log in to receive a notification when this item arrives in stock.

The Synergy 516 Electric Flybarless Helicopter has been designed from the ground up to be one of the lightest weight within it's class, yet delivering incredible performance! Incorporating the classic Synergy design standards, the overall fit, finish, and quality found within the kit will be second to none. 2mm Carbon Fiber is found through out the model (specifically on the side frames, and vertical tail fin), and full CNC machined 6061-T6 aluminum is found throughout, paired with lightweight yet strong Delrin components, the 516 will not disappoint pilots in regards to durability, and precision.

The Rotor Head has specifically been designed with today's 3D flight in mind, by offering a wide 140mm head width which provides optimal disk loading. The extra wide head block provides quick cyclic response & high stability. Maximum performance was always a design concept, and with this thought in mind, the headspeed on the model is extremely flexible and capable of running upwards of 2800+ rpm!

The Tail Rotor was designed with a 6mm wide belt, optimal for keeping maintenance low for pilots looking to concentrate on flying rather than building and repair! The belt additionally utilizes a spring tension system, which provides a quick way to set the belt tension correctly each and every time. The Tail Rotor it's self utilizes a 6mm output shaft, with HD Tail Rotor Hub & Tail Rotor Grips. Lastly, the boom utilizes a large 24mm OD self-supporting boom, which does not need conventional style boom supports for strength.

For a final touch, the model features through out turnbuckle style linkages, allowing the utmost precision in set up when pilots are looking to chase that 0.5 degree of blade pitch, or make finite adjustments to the swashplate linkages for a perfectly level swash during set up. The battery tray additionally incorporates a variable C.G. system, & quick lock mechanism for ease of insertion and removal.

Main Blades:
500-520mm Suggested 
Main Gear Ratio: 11.31-9.53:1 (18T pinion included; 10.06:1 Kit Gear Ratio)
Tail Gear Ratios: 5.0-4.1:1 (20T included; 4.5:1 Kit Gear Ratio)
Tail blades: 80-85mm

Needed to Complete:
  • (3) Cyclic Servos: Mini Size - MKS 9767, BK DS5001
  • (1) Tail Servo: Full Size - ProTek 270SBL, MKS HBL980
  • (1) Brushless Motor: 4020 Class w/5mm Shaft (1350-1400kV Recommended)
  • (1) Brushless ESC:6s Compatible, 90A or Higher
  • (1) Flybarless Gyro
  • (1+) Battery: 6s 22.2V 3800-4500mAh
  • (1) 510-516mm Main Blade Set
  • (1) 80-85mm Tail Blade Set
  • (1) Battery Charger
  • (1) Transmitter
  • (1) Receiver
  • Building Supplies
    • Building Tools
    • Threadlock
    • Digital Pitch Gauge

This product was added to our catalog on October 31, 2017

Verified Owner
Friday, Jan 5 2018 (about 3 years ago)
Synergy 516 Flybarless Electric Helicopter Kit
Amazing build quality. This is my first Synergy and I’m highly impressed. This is probably one of the best helis on the market today. It’s a bit pricey, but you get what you pay for.
Verified Owner
Tuesday, Nov 21 2017 (about 3 years ago)
Synergy 516 Flybarless Electric Helicopter Kit
Typical Synergy quality. When you open the box you'll wonder what you paid $$ for. Not much to this kit. Build is easy and fast. The battery tray works better on this model then it did on the 766 probably cause its shorter. Very cool intergraded motor mount into the middle bearing block. Makes setting the mesh more difficult cause you have to tighten the motor bolts from underneath. If you own any Synergy models this wont be anything new, if this is your first Synergy, you wont be disappointed.
Wednesday, Sep 16 2020 (8 months ago)
Synergy 516 Flybarless Electric Helicopter Kit
I wanted a smaller heli that I could fly in the mornings or in an open field in town. I built one of these and went straight for the stretch kit. It flies really well and is a blast at lower headspeeds (just make sure you speed up the tail and put on bigger tail blades).

My only real complaints is some vertical play for the main gear / tail pulley up and down which I can't seem to get rid of even with the shim. I am also not a fan of the canopy colors as its harder for me to see, I opted to get a really bright aftermarket canopy.