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Ah, I hadn't looked at the other replies when I posted my 'puter query. On the CoG issue, I think DJI assumes that the FC will be mounted at (or over) the CoG point. In this case, the CoG is also the "Central Axis of Movment", the point around which the MR pitches, yaws and rolls. With the...

I did a Search, and Computer Threads are indeed a Quagmire. So rather than start Yet Another Computer Thread, let me run a couple of question by here: my main use with Quadcopters is running the Assistant Software in the field for configuring the flight controller. Or for programming certain...

Here is a diagram showing the idea I was discussing for a way to measure the "z" value when balancing a multirotor. It shows a "bare" quadcopter with the z-balance rod installed and hanging on a string. The actual "z" value should be determined with the props, battery, camera and camera mount...

What I propose to do with mine is to have a small bracket attached to the side of the center frames with a light rod parallel to the z-axis. Orient the 'copter sideways (ie, booms vertical) and hang it from the rod. The point along the rod where the booms are absolutely vertical ("plumb") is...

I may some day but for now I've got Naza Lite Flight Controllers which are non-Canbus, so I'll need a USB device with the Assistant Software on a laptop/tablet for field configuring. And one could have a gazillion other uses, too. I'll hit Search and see what folks are talking about and if I...

Then I will plan to start off doing that myself. It might even pay (time- & trouble-wise) to get a laptop or tablet for use with the multirotor. That would even be useful to review review photos and videos in the field. I'm currently old-school with a nice desktop system... Thanks. --Bill

In the NAZA Lite mounting section (page 12 of the pdf manual) you have to input the x, y and z coordinates of the GPS antenna of the flight-ready multirotor. And there is a Notice that "You must re-configure if the ALL-UP-WEIGHT had been changed on your multi-rotor". Both items understood...

Sure, perpendicular is the recommended orientation for the remote RX antenna. But what restrictions are there about mounting the receiver near metal rotor booms? Or close to motor power and ESC wires? Minimum separations from these items? --Bill

I hate to sound wishy-washy, but that makes sense, too. I'm still building my two big birds, but my "practice" quad is a Blade 180qx and I'm developing reflexes in a flight sim (AeroSim). I got the detent idea when I noticed that the Mini likes half throttle in it's Stability Mode and in the...

That makes a lot of sense. The FC is an adaptable device using inputs from several sensors to arrive at the final "solution" and the exact value of the "throttle midpoint" gets prioritized to an approximation. That explains why a careful set-up of the FC with the (Naza) Assistant Software...

I'd be inclined to move some motors and ESCs around to see if the vibration follows the motor and/or ESC. Try to rule out a motor problem before chasing your tail on a mechanical balance solution. Swap props and hubs, too. On the little quads I'm building, I'm waiting for a break in the...

A couple of years ago I took up RC boats and found that it was very useful to modify the transmitter throttle ratchet to have a center detent. Boats use a reversible ESC and it helps to have the detent when initializing the ESC and when you need to sit still in the water. The detent was very...

I'm using JR AR8000 receivers with a main Rx and a satellite Rx. I'm trying to figure out the (a?) optimum location for mounting the second Rx. The main Rx will be mounted on the main board next to the Naza FC, with the single antenna wire pointing forward. The two multicopters being built...

I think it is simply a matter of preference, too. I'm still in the process completing the build and setting up the transmitter so I don't even have a preference yet. We'll see how it turns out... --Bill

I'm setting up an JR XP8103 for multicopter use and one modification will be to replace the two Aux2 and Aux3 (Channels 7 and 8, respectively) potentiometers with 3-position toggle switches so that these two channels can be used for setting the Flight Mode and the IOC. Give that this is a...

Thank you sir, that Epiphany still stands. As I said, I have a concern about bumping the switch to Man and panicking as the plane goes bonkers in Manual. Now to dig in an conquer the next issue. Never have had a failsafe function activated in my Tx before and that is new territory...

And just when I _thought_ that I was starting to understand this... What does Ben Kenobi mean when he says: And why is "failsafe" inserted between GPS and Atti, and between GPS and Manual in this screengrab from the Naza user manual (item #5)? --Bill

Now that is a good idea. I have an older 8-ch Tx that I converted two of the proportional pots ("knobs") to 3-position switches, and one concern was that I could accidently switch to Manual on the GPS/Atti/Man switch, and was looking at somehow disabling the "Man" setting with programming...

This is something I've puzzled over, too. "Good practice" with multi-motor fixed-wing aircraft is to disable all but one of the ESC's red power wire (or all ESC power wires if you use a separate UBEC). The reason given is that the multiple linear voltage regulators on the ESCs "conflict" and...

I've decided to not even chance anything-- I removed the magnets with careful application of acetone with a Q-Tip and and am planning a new fastening scheme using either Velcro or 6-32 Nylon thumbscrews. --Bill