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  1. J

    Photohigher skyline rsgs

    Also Cineron seem to be behind their own schedule. Their mount was promised to be available to hire from Division Cameras by now, but I don't see it listed.
  2. J

    Photohigher skyline rsgs

    I'm seeing some horizon issues in that reel. Presumably sorted by now since they don't seeming to showing up on the Zenmuse?
  3. J

    Have we come too far too fast?

    STM32F4? Yep - OP Revolution has one of those, too ;)
  4. J

    Have we come too far too fast?

    "things that bug me" - yep, I've got lots of those too, but that's a whole new thread. ;) Not impressed by the CarbonCore arms - the profile is just a rectangle with filleted corners - that seems like a lot of trouble/expense for a non-ideal solution, aerodynamically speaking. The only...
  5. J

    Have we come too far too fast?

    I've never seen helical strakes used on a multirotor arm, but I can't see that they'd be effective, or even appropriate. Low frequency resonance (which the strake is designed to disrupt) is not an issue (that I've heard of) on MRs. A "streamline" arm profile should be effective in preventing...
  6. J

    Photohigher skyline rsgs

    My understanding is that the Zenmuse is using brushless motors (of which stepper motors are one variant). The problem with RC hobby servos (and the variance in suitability of different makes/models) is, IMO, less to do with the motor than the gearing and the feedback mechanism. Any gear system...
  7. J

    Have we come too far too fast?

    Re: Al's post I entirely agree that customer expectations are absurdly high. And, yes - this stuff is really, really, REALLY complicated! Just look at the technical discussions that go in the developer forums. Here's a current example from OpenPilot...
  8. J

    Have we come too far too fast?

    Sorry to further a divergence from the topic - but... Temperature rise will not be exponential - the energy input is constant (assuming a hovering state). What you are observing/describing is a heat build-up due to inadequate cooling. Newtons law of cooling states that "The rate of heat loss of...
  9. J

    Neills DIY Gimbal Design

    Must be a "law of averages" thing ;) Looking at that last pic, you've got no stand-off between top/bottom plates on the right arm, whereas there is one on the left arm. Is something else going to fit in there?
  10. J

    New toy for us camera geeks

    This is the pivot point, I believe. At anything more than 100 meters the craft is no more than a dot. At 500m it would be all but invisible. So if one is looking to capture images at that sort of range then you have to be flying full IFR anyway. So this is a cheap, short range, off-the-shelf...
  11. J

    New toy for us camera geeks

    About $200. Range - I've tested it to 500m line-of-sight across open ground. Data rate drops, but that's the beauty of live view - it's a stream of individual jpegs so as the bandwidth drops it just reduces the effective frame rate. In practice why would ever need to be more than 100-200m from...
  12. J

    New toy for us camera geeks

    No, you don't need that. Haven't tried that new model but all the previous efforts, from both Nikon and Canon, were completely pants ;) The trick is to use the USB connection on the camera and a "USB Device Server" (basically a variation on serial over IP using VCOM). At the moment I'm using a...
  13. J

    Want some inspiration?

    For the video-bods here - http://www.bbc.co.uk/britainfromabove/stories/behindthescenes/aerial.shtml The "Britain From Above" series is worth buying on DVD - superb aerial work (no multirotors, though).
  14. J

    Want some inspiration?

    Agreed -all from a real helicopter, I think. But "the look" is distinctive. Definitely using longer focal lengths than is "normal" for MRs - to give a much more natural perspective. I believe (and I know Denny has said it several times here) this is the key - getting gimbal performance good...
  15. J

    Want some inspiration?

    A beautiful site showcasing some beautiful aerial stills photography. Truly inspirational. http://www.jasonhawkes.com
  16. J

    Heavy Lifters - where are we up too?

    Yeah - seems nobody else is wanting to contribute :apathy: I presume you've seen this: http://www.droidworx.com.au/specifications.html According to their own numbers, they are indicating that your AUW would exceed even their Skyjib 8. Did you mention Aerobot at the beginning of this thread...
  17. J

    Heavy Lifters - where are we up too?

    Sounds cool - although I'd still be looking to place the "camera" within the frame, right at the CG. Having such a heavy sensor hanging well below the frame (and hence the plane of thrust) will slow the responsiveness right down, making the craft work harder and hence shortening flight times...
  18. J

    Sony RX100

    Looks interesting - same size sensor as Nikon V1 but (as usual for Sony) better video specs. Only thing that irritates me is the idiotic marketing use of the "one inch sensor" description. Obviously it's not that size - actually 13.2x8.8mm - bigger than a regular pocket camera but much smaller...
  19. J

    How does the Z15 do as a 2 person setup?

    This guy did something interesting with a Zenmuse: http://forums.openpilot.org/topic/11424-s800-zenmuse-z15-gimbal/
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