This multirotor has the ability to go full 3D flight at an amazing speed. It is going to revolutionize the multirotor world.


  • Unique Fully Aerobatic Quad
  • Higher performance 3D flight capable
  • Stable and smooth beginner flight
  • Includes TG-Multi flight control
  • Durable and simple VP design
  • Pre-painted clamshell body set



Specifications: Span: 490mm (diagonal rotor to rotor) Blades: 110mm Frameset: 85% carbon and metal design Drive System: Single Motor

  • Frameset (metal, carbon, plastic)
  • TG-Multi flight control (upgradable, used in VP Quads, Helicopters)
  • Blades (4 sets)
  • Pre-Painted Body Set

Needed to Complete:

  • 4S 2200 - 3000mAh 30C+ Battery
  • 6 Channel Transmitter & Receiver
  • (4) Servos - High Performance Digital Servos (0.8 sec/60° @ 6V minimum)
  • 45A ESC w/5A BEC
  • 3000kV / 390W Motor



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  • This was posted on Curtis's fb, that definately looks like a 3dr gps.

    Stingray - GPS functionality coming April 2014

    Posted by Curtis Youngblood on Tuesday, February 18, 2014
  • Simply amazing. Well done!
  • Vince, I've never tried it!  Hope I never have to find out! :)

    I'm sure it'll happen eventually though.  I would like to get it to the point where the APM could at least recognize the event, and establish a controlled high speed descent so that at least we can have a controlled crash, instead of a blade-stop plummet.  I'm sure with enough work, eventually we could get to the point of having a true auto-auto-rotation.

  • Im having doubts about being able to 'auto' 4 independent rotors. It would be quite a juggling act to keep the right pitch and maintain some maneuverability especially on those light blades.

    Rob, slightly of topic, How does the APM heli cope with autos in various modes?  Im guessing you have to take over PDQ.

  • One-ways on each hub would definitely make it auto-better.  Fact is belt drag is going to kill it.

    I just finished building a Protos 500 heli, which uses a single serpentine belt to drive both the main shaft and the tail.  The one-way is actually on the motor shaft, so the main blades have to turn the entire belt drive.  When you shut off motor power, the head stops almost immediately there's so much drag.

    Belts can be very efficient, provided they don't have to flex back and forth too much.  Every time you make them flex, that takes energy, as you do work on the rubber.  A standard 2-pulley system has 4 flex points.  The Protos has 16. 

    How many does the Stingray have?

  • Its certainly the way to go if you are determined to put a gas engine on a quad but I cant see any advantage over a conventional heli. It would be possible to put freehubs under each rotor to greatly improve autorotation.

    I think it would all work better on a larger machine.

  • Maybe it's easier to design a tricopter.

    There are some advantages:

    - Rotationdirection of props doen't matter

    - Better Yaw control

    The tail may be done with a conus drive like on the bigger T-rex.

  • I just found some of your bugs Rob, yes it's polling, and there is additional sensors not in this pic.


    But again, there was little code I could add to APM, without breaking the 40hz loop. If I started pulling stuff I didn't need, maybe, but again, I just need to learn the PIX (IDE really), as I too use to VS.


  • The power-off  "Autoglide" as CY calls it starts at 7:12 of the above video. It doesn't look like a true autorotation and it depends on a last little bit of battery to soften the landing (rather than using energy accumulated in the rotors during the decent). So more of a simple braking effect on the way down. If there was no battery left or a bad motor or ESC at the end the touchdown would be pretty hard but it looks like it would be a lot softer than the basic rock-out-of-the-sky crash.

  • This would be nice for using a gasoline engine!

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