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3D Robotics

1973: Maynard Hill invents the electrostatic autopilot

Posted by Chris Anderson on April 11, 2010 at 10:26pm


Google has recently scanned and posted all of Popular Science's back issues (and they go WAY back), and there are some gems in there from the early days of autopilots. One of them is this, which describes an autopilot the legendary Maynard Hill (yes, the guy who flew a hobby UAV across the Atlantic in 2003) built that uses minute electrostatic differences with altitude to create an analog autopilot.


Here are some other pictures from the article, but you should really read the whole thing. Anyone know what went wrong with this approach and why he abandoned it?




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Comments

  • T3
    Krzysztof Bosak April 4, 2013 at 5:18am

    I am only avoiding the box that is full of mess and everybody knows why. Just check how the magentometer behaves in real life, compare physical quantities at play and take conclusions.

  • T3
    Krzysztof Bosak April 4, 2013 at 4:51am

    "If you can detect changes you can navigate!"

    I can detect changes in air temperature. Is this enough to navigate? :-) Of course there are convection issues but if you make thermometers more responsive and a little more of this and that... blah blah. Or wait, maybe not at all since the idea of electrostatic AP is known since 1973 and meanwhile US drones industry supposedly tried those most basic ideas... Just don't assume you can look at 2 pages made by oterwise very well known person, record holder in many categories and get it rolling.

  • T3
    Krzysztof Bosak April 4, 2013 at 4:33am

    The paper you have posted is interestign and also coimpletely uninteresting. This is just a sensor for dtection, not navigation.

    "Who say's you have to use electric motors on a drone?"

    A modem? A servo in the aileron? Static charge accumulating on the wings due to air friction, changing dramatically with humidity?

  • T3
    Krzysztof Bosak April 4, 2013 at 4:15am

    Total waste of time. Electric motors ruin everything.

  • Stephen McAmis April 12, 2010 at 6:07pm
    lol Lew.
    Nah, more or less I was saying that if someone uses the stuff... they shouldn't inhale! ;)
  • Lew Payne April 12, 2010 at 12:35pm
    @Stephen - Regarding the Russian diplomat who was poisoned with polonium... are you implying they tricked him into thinking the StaticMaster was a moustache grooming tool? :)
  • Stephen McAmis April 12, 2010 at 10:44am
    Isn't Polonium the same stuff that was used to kill the Russian diplomat in England a couple of years back? Seems they got the stuff from those brushes too.... not sure, just curious.
  • Lew Payne April 12, 2010 at 9:33am
    Polonium can be purchased off-the-shelf. In the 1980's, we were using it to do x-ray photography of small objects, along with piezoelectric Kirlian photography. The polonium was obtained from StaticMaster Brushes(the refill cartridges), and for the piezo generator we used a Radio Shack device that generated a needle-point static charge when you squeezed its handle, and was designed to remove dust and static from LP's and 45's.
  • Tj Bordelon April 12, 2010 at 6:44am
    You can use an alpha particle source from a smoke detector to "tap in" to the voltage reading. I'm not sure why but this supposedly ionizes the air and provides a connection point.
  • Mike Bakula April 12, 2010 at 6:18am
    You could probably do it with pairs of field mills, but they're going to be a lot heavier.
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