Blogs

You need to be a member of diydrones to add comments!

Join diydrones

Comments

  • Developer
    Jani Hirvinen June 8, 2010 at 11:05am
    James F.,

    Oh yeah forget to say. If you think that you have something to offer for this ArduCopter project, please contact me or Chris and we can look things more... My contact info is on title area and Chris's info you can find on bottom of this page on gray area :)
  • Developer
    Jani Hirvinen June 8, 2010 at 10:58am
    Yes we have. Problem with rubber spacers between bars is that it create movement on bars and that way affects gyro/accelerometer calculations. We are even measuring vibrations from different aluminum and other materials along with shapes of them.

    Also now that whole ArduCopter is based on gyros of "new technology", we going to have a lot better resistance against vibrations and harmonic frequencies on our frame.

    For hobbyist who build their own frames we naturally cannot guarantee all this measurements. And like all other projects too, we are developing this step by step.

    --jp
  • James F. June 8, 2010 at 10:21am
    Also, has anyone looked into putting rubber spaces between the bars and the body as inertial dampers to reduce vibration?
  • James F. June 8, 2010 at 10:18am
    Is anyone doing any FEM work to determine load paths, limits and natural frequencies?
  • Developer
    Sandro Benigno June 8, 2010 at 9:59am
    Here goes a render with the spacers correction. Isn't the final look. When we finalize all modeling job of the pieces, then we can concentrate on doing some tests with different materials and color, by the Jani's orientation. For now, the object's finishing are the most simple as possible, for not losing the focus. First of all, we need all objects done, to test and find the better way to accommodate all parts. You will certainly be surprised by the great job that our team is doing.

    3692050790?profile=original

  • Developer
    Jani Hirvinen June 7, 2010 at 5:13pm
    Design is rather varsatile, ESC can be mounted both ways on top/below center frame and also to the booms. I personaly don't want to mount them on booms close to the motors due high risk of destroying ESC on a crash. Also if you mount them close to the motors, you will add extra weight that needs to be turned and we all know that weight at end of long arms it never good, this wastes also a lot more mAh's turning multirotor. On booms close to center frame is better plase.

    But user can deside it while they build their multirotors.

    @Ravi, Thank you but we already have partners for producing all needed parts and a bit more.. :)
  • Admin
    Morli June 7, 2010 at 4:35pm
    Good heat sink adds weight and 4 of them !!! next to Rc RX may or may not be trouble. Every gram in weight saving counts in Quad IMHO.
  • Ravi Gaddipati June 7, 2010 at 4:30pm
    Even if the ESC's or on the center, the arms can be used as heatsinks.

    Even with the low air flow, I think it will be fine as long some form of a heatsink is used (A bare MOSFET back would be a bad idea).
  • Admin
    Morli June 7, 2010 at 4:07pm
    Yep,I agree with Chris.M , the boom as heat shield and ESC away from RF sensitive electronics is better IMHO. One can always use the prop wash to cool things which may not be possible in center while hovering or in slow flying craft.
  • Chris McNair June 7, 2010 at 3:49pm
    If done right the Boom can act as a great heat sink. It’s always better to have the power lines and signal running longer then the motor wires.
This reply was deleted.