Recent content by Token

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    Phantom 4 fell out of the sky...why?

    Here is a plot of the GPS altitude, Barometric altitude, Commanded RC Throttle position, and Power used. GPS Altitude = Dark Blue Barometric Altitude = Magenta RC Commanded Throttle = Yellow Power drawn = Cyan You can see the power draw increase when the motors throttle up, and...
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    Phantom 4 fell out of the sky...why?

    The difference is that you can point the electronic tape measure at exactly what you want to measure, and it even has a laser pointer built in so you can confirm it is pointed at the right thing. In order to measure ONLY the distance to the point you are interested the ultrasonics of that unit...
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    Phantom 4 fell out of the sky...why?

    Thanks, grabbed both. Converted the .DAT file and have been having fun looking at the data. It is pretty obvious something went wrong, but what exactly is not clear. Plotting the power draw vs gpsAlt and a couple other factors you can clearly see the GPS was reflecting real world actions...
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    Phantom 4 fell out of the sky...why?

    Thanks for looking at those for me. I plotted the data that was in the csv file that resulted on the phantomhelp page and came up with plots similar, but less detail, to what you got. Of course I can’t see the gpsAlt or one of the two Yaws in that file. After seeing the GPS alt data to me...
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    Phantom 4 fell out of the sky...why?

    The truck (actually a 1999 ZR2 Blazer) is 18 years old with 200k miles on it and shot paint, it is my desert off-road beater, very dependable but not really pretty, bordering on ugly. Believe me, I don't care about a couple dents in the roof. What I do care about is if I did something wrong I...
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    Phantom 4 fell out of the sky...why?

    How about if I host a zipped file on my server? Here is the zipped .dat file http://www.tokenradio.net/Aviation/FLY036.zip T!
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    Phantom 4 fell out of the sky...why?

    Understandable. However, a flaky barometer would not cause the uncommanded yaw changes, especially as the data seems to show that the yaw was indeed changing. A combination of a flaky barometer and gyro could account for both, however probably as then the yaw data would not make sense. Also...
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    Phantom 4 fell out of the sky...why?

    I don't really know what the color coding on that web site means, however I don't really see anything particularly concerning with the voltages or variations shown. The voltage looks like it bottoms out at about 13.3 VDC under heavy load. That kind of voltage sag under load is not really...
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    Phantom 4 fell out of the sky...why?

    No, none of the ham radio gear (that vehicle has all bands and all modes 160 meters to 23 cm) was on. T!
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    Phantom 4 fell out of the sky...why?

    Sure, I'll give it a try. Let me figure that out, it may be a while. T!
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    Phantom 4 fell out of the sky...why?

    I think from the timeline that when the sat count dropped to 14 the thing was already almost all the way down. And yes, the first motor obstruct was at 126 feet in the data, and it was already within a few feet of the roof of the truck at that point I think, it hit a ham 2 meter antenna just...
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    Phantom 4 fell out of the sky...why?

    Some of it, yes. It was recording for the entire trip down, but it appears to have glitched on impact and not written the last bit, so you see the door of the truck come into view and then the footage stops. Also, the write date got corrupted on impact, and it shows the video was created on...
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    Phantom 4 fell out of the sky...why?

    Ahhh, the link, sorry, not done this before. Phantom Log Viewer - PhantomHelp.com If that data is to be believed it went form 230 feet to impact on the top of the truck in less than 10 seconds. Of course it shows the motor obstruct at 126 feet the first time. T!
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    Phantom 4 fell out of the sky...why?

    OK, I uploaded it, now what? Sorry if that is a newb question, but until you mentioned it I did not know that web site existed. I see the battery was only 55% when I launched, I thought it was a bit over 60% (it may have been there the first time I turned it on, this was the second time, after...
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    Phantom 4 fell out of the sky...why?

    Howdy all, The recent rains and snows in California have left a lot of image ready landscape out there. Today while driving in the desert I saw an image I had to get, the snow capped Sierra Nevadas on one side and the equally snow capped Panamints on another. The spot is miles from...