Recent content by ajohnsonlaird

I wonder whether what you guys are seeing is "ground effect" -- that is, when a copter is close to the ground (say, 18" or less depending on its size) it creates a bubble of compressed air beneath the copter and through which the copter has to descend in order to touch down -- the ground effect...

While I agree it is normally BS, back a year or more, there was a bug in the DJI Inspire 1 TB48 then current firmware such that if you left the battery at storage charge over the winter months then it would enter the "automatic" discharge mode -- but it didn't know when to stop, so it would take...

Well said, Ed. The addition of the Department of Homeland Security's report regarding concerns that DJI is sharing flight data with the Chinese Government is worrisome to say the least -- even assuming for a moment that the alleged facts in the report are only partially true (and I have no data...

Yup. I have four such TB48 batteries that were so intelligent they destroyed themselves. Andy

Has anyone found a reliable source for the cells in TB48's? I have four that I'd like to re-cell. Andy

@ajobmuse: It looks you have a problem with gimbal roll (not yaw). If that's the case, you might want to try tapping on the I2 icon at the top of the screen in camera view, then the camera icon (one up from the bottom), and then Adjust Gimbal Roll and experiment to get the camera level. Hope...

I suspect that the I2 uses a barometric pressure sensor (because GPS is not particular accurate in the vertical axis and is measured agains the approximate mean sea level of the Earth, see 1-Mean Sea Level, GPS, and the Geoid). I also suspect that you're going to be flying higher than the...

Wow. I have never heard the likes of that! (Sorry that this is not the answer you were hoping for.) What on earth could be inside an RC and making that kind of noise? It sounds very much more like a mechanical noise to me. There is a tear down page with images inside the RC. Could it be that...

I'm hoping that it's not a sign that the internal battery has a problem -- I've seen external LiPo batteries "telegraph" that they were not happy campers by getting warm when they were in some sort of internal self-discharge. Call me paranoid (or Mr. Paranoid if you want) but I would not put...

Is there a chance you could record this noise and post a sample? I'm wondering whether it is actually electrical -- the symptoms you describe make it sound like it might be electrical (e.g. noise disappears when powered on or charging). I've certainly not heard of this kind of fault before --...

Understood. if you see a bright flash in the Western sky, that'd be me cocking it up! :) Cheers Andy

Hi Mike: I'm still flying ALTA 6's and 8's, but only using Canon Mark III and Pannie GH4s. And, of course the Inspire 1 and 2. I've still got a couple of Cinestar 8's on the wall though. They make imposing wall art! :) Thanks for the compliment re: wit and wisdom. Some days I feel witless and...

Aha -- I thought you might be the Mike Magee from Cinestar fame! Nice to see on you on this forum. Are you still flying anything from FF? Wow. Must have been, what, five years since we were both in Whitefish, MT! I infer you're flying an I2 now? Glad to hear it's not just me that's confused...

Hmmm. Well I'm thoroughly confused. What we know is: "The ++ and -- pins are both input and output depending on the battery mode." (This means the - - + + + + - - pins shown on the Mavic image.) "The mode is determined with what is done with the remaining end pins" (which, based on the diagram...

Thanks for the information, David. I don't have a Mavic power supply so I cannot measure any voltages. The image you posted shows the polarities but not whether they are inputs or outputs. I wonder whether the I2 charging hub presents charging voltages when there is no battery connected? That...