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    GPS Flying today

    A head's up..... http://nypost.com/2014/06/12/is-the-earth-going-to-be-cooked-on-friday-the-13th/
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    Battery weight versus performance

    Two colleagues raved about the superiority of their Thunderpower batteries as compared to my Turnigy Nanotech batteries so I thought I should investigate further. The common specs for both batteries are: 6S 25C 5000 maH The Thunderpower battery weighs 695 grams. The Nanotech battery...
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    DJI A2 spare RC Xmitter outputs

    Documentation seems to indicate that four RC Rx outputs can be directly mapped to output devices and therefore bypass the A2 FC, these being D1, thru D4 and these correspond with F1 thru F4. I would like to make use of one of these to remotely control my BGC camera pitch angle.... But it only...
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    S1000 motor offset angles

    Which of these two angles is the one that leans the motors towards the hub? Each frame arm is designed with an 8° introversive and a 3° inclination, making the aircraft more stable when rolling and pitching and more flexible when rotating." And can I assume that the other angle is the...
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    Risk Awareness Item

    Please be aware that it is possible to jam GPS signal and also disrupt 2.4Ghz RC signals with certain electronic equipment. And we know what that could do to RC VTOL aircraft such as Helis and Multirotors including RTH functionality: http://transition.fcc.gov/eb/jammerenforcement/jamfaq.pdf...
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    CBC - The Rise of Drones

    The news item appeared tonight on Canada's CBC National News..... some positive but too much negative, thanks, in part, to our infamous "stultus or Homo incurvatus in se!" from Vancouver BC. Unfortunately the Aviation lawyer - Lee Mauro makes mention of a imaginary 75 pound carbon fiber drone...
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    LiPo Battery Internal Resistance

    In case anyone is interested....... seems useful for understanding LiPo battery internal resistance as it relates to useful battery life. http://www.maac.ca/docs/2013/lipo_batteriesinternal_resistance_max_current_draw_true_crating__rev3_toc.pdf Online tool: http://www.jj604.com/LiPoTool/
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    Cinestar - 3rd Axis Pan Motor Cage

    This is the Cinestar 6 or 8 3rds axis pan motor cage that accommodates the larger pan motors for DSLRs up to Red Epic I think (see photo). It is the MV026 Z2 manufactured and sold by Famous Hobbies thru AliExpress. I ordered this by mistake and have since ordered the smaller one which is the...
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    Understanding Motor vibration

    I just came across an interesting article from an industrial electrical magazine about industrial motor vibration analysis and thought this information should be shared here on MRF. The iPhone iseisometer app will show three separate vibration axes, i.e., x,y and z. Typically the IPhone is...
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    GPS Alignment with True North or Magnetic North

    Previously with the WooKong-M I had to turn the GPS assembly so that the arrow was pointing away from true north and towards or away from the magnetic angle of declination for my flying area. However I see not mention of this requirement anywhere in the A2 documentation nor in the DJI A2...
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    FAA Myths

    http://parcap.org/news/faa-myth-busting/ Myth 7: only 7500 commercial by 2018...... versus the original forecast of 30,000..... That works out to about 1500 per year throughout the entire USA. Comments?
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    Multicopter for Police Use

    FYI - Here is an interesting item where a Swift Current Saskatchewan Hobby shop has become a significant supplier for fleet of Multirotors for police aerial camera work. I would be interested in what the experts on this forum have to say about this MR design, cost, reliability etc. The...
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    Motor Balancing Device

    This item can be positionon on your MR motor arm and be connected directly to your PC. http://www.phidgets.com/products.php?category=5&product_id=1041_0 With this you can utilize your PC full screen size for analyzing motor balance/vibration issues. With the right software tools such as MS...
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    Brushless Gimbal Weight

    IMHO - seems there remains a major limitation with the brushless gimbal concept. The heavier the camera, the more torque is required and that means heavier motors when compared to the conventional servo gimbal control systems. But the servos achieve the required torque by gear reduction and...
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    RC control of GH4

    Has anyone been able to successfully use the following to control the Panasonic GH4? http://www.rcshutter.com/index.php?route=product/product&path=20&product_id=97 It is not specifically stated in the title/description.
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    Lowering a Rover from a Multirotor

    Isn't it about time someone developed a winch to lower an RC buggy from a Multirotor? Here is how NASA did it!
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    DJI A2 on a Cinestar 8

    For what its worth, here is my Cinestar 8 c/w DJI A2..... still going thru bench testing, QA and QC. FPV, Camera c/w BG+BGC to be added after several initial test flights. No rush since we just had our first snow blizzard of the year and am confined to the man cave for awhile yet......
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    Mikrokopter MikroKopter Angle Adapters

    It appears that MikroKopters need the motors offset slightly as per the following accessory. http://www.mikrokopter.de/ucwiki/en/AngleAdapter My understanding is that these accentuate yaw control and help to balance the motor currents between the cw and the ccw motors for hovering and...
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    2Much - 2Fast!

    Starting to get really scared now..... http://www.dji.com/feature/phantom-2-vision-features/ Wondering if my Cinestar 8 c/w DJI A2 is suddenly far too big and old school already! Hope not....
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