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Variable Pitch Quad-copter

Posted by Joel on September 19, 2010 at 4:14pm

I've been thinking about working on a collective pitch quad-copter. I'm new to the site and UAV's and am experienced in simply flying collective pitche helis. I'm planning on contributing for the code for CCPM Helis.

 

I think that variable pitch would have several benefits:

 

1. One motor could controll all 4 rotors via belt or torque tubes.

2. Quicker respone. At least on regular RC helis collective pitch in "idle up" mode equals much quicker response than fixed pitch(which works by speeding up rpm of motor).

 

 

Cons:

 

1. Weight - extra parts needed: (servos[s]) to control pitch of each rotor. belt or torque tube and gears etc.

2. Programming - not really a negative but would need to be reprogrammed to controll pitch of each blade instead of speed of each rotor.

 

I would appreciate any thoughts on the subject. I see that CCPM heli control(t-rex 450) is already being worked on, so why couldnt variable pitch be used on a quad?

 

 

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Replies

  • Moderator
    Roberto Navoni September 20, 2010 at 3:24am
    Hi Joel,
    we starting to work to variable pitch quadricopter 2 years ago . We're develop it and it fly the name is HG3 now is available the new one more affordable and safe that can use green fuel engine and electrict ,too
    this is the link of projet
    http://www.virtualrobotix.com/profiles/blogs/hg3-the-era-of-quad-va...

    Today I think that i post the update of HG3/2
    Regards
    Roberto
  • Mario September 19, 2010 at 5:08pm
    My friend and I have been working on this idea for a year now. We went a little bit further by adding tilt rotor capacity to the idea of variable pitch. The challenge is pretty high but so far it look promising. We want to have a flyable prototype before posting any thing about it. That should be very soon. So here is our question: What would you think of a twin motors,variable pitch, tilt quad rotor that would have a flying weight of less than 1 kg, a diameter of roughly 1.2 meter with trex 250 main blades size rotors? If we meet our goal and two of those four rotors can sustain a level flight, can you imagine the kind of flight attitude you could achieve? We are planning to give back all the airframe infos and drawings to the community. That will be our participation to this great adventure.

    Mario
  • 3D Robotics
    Chris Anderson September 19, 2010 at 4:42pm
    Check out the work of Foxteam in Italy. They've already got one working.
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