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  • That's really cool to see in action!

    If you're going to time your rotors though, surely a Synchropter is a better option from a frame/weight perspective, but it takes more to do.  I'd love to give it a go one day, which is why there's rotor heads lying about on my desk for some time now... 

  • Really cool achievement and I am sure looking at it mechanically timed and synchronized with a geared drive shaft.

    Variable pitch lets you do some nifty things.

    I did notice some interesting sounds as it accelerated and performed various maneuvers, I would guess that the rotors tend to periodically mess  up the air for each other under various flight conditions.

    I also agree wit Rob a single rotor , possibly even with slightly less swept area will always outperform - outlast it all things being equal, nothing beats prop/rotor diameter.

    Of course those big rotors do build up a huge amount of inertia and can cause serious lethal damage when crashing or out of control.

    When those big Russian ones crash you would be much happier being several miles away.



  • This is intriguing.  

  • They don't appear to be using much vertical offset.  So must be timed.  Chinooks are both timed, and staggered vertically.

    Certainly is pretty cool to see this.  I think it's from the guys who have made UGCS.  Wonder if they're planning on contributing their code?

    I had wanted to do one of these for a while.  But never got around to it.  I'm not sure the performance numbers (flight time) would best a good single rotor setup.  This is borne out by looking at the full-scale helicopter market as well.  The largest, heaviest lift helicopters are single rotor.  A big problem with tandem, is the drivetrain required to keep the two huge rotors in time ends up weighing quite a lot.

    Where I do think tandems are the indisputed champion, would be payload per frame size.  If you had a requirement such as "how much can I lift with a machine that folds up to fit in the back of a pickup?" nothing, nothing can beat the disk area of a tandem heli.  And that may well translate to payload.

  • Very cool.
    Are the drive systems linked, like in a chinook, so if one engine fails the other can still power both rotors?
    Also, it looks like the rotors overlap. Are they timed to miss each other or are they vertically offset from one another?
  • Awesome!

  • Wow awesome work!

  • Potential flight times and payload capacities have got to be amazing!

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