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Your unit is working well 'outside' the best efficiency area for the motors, but you should still be able to get a lot more time. The first thing to do is calibrate the Naza's voltage sensing. I've had one unit that was OK, and two that 'under-read' the actual battery voltage by a large amount...

The commonest cause of this type of thing, is I'm afraid the motor connectors. DJI, have had an enormous 'batch' of motors, where the soldering to the leads at the bullets is faulty. It commonly works for a while, then fails. Cut the heatshrink off the outside of all of the bullets. Look at...

I don't actually think the Naza algorithm is basically a PID one. I write PID code as part of my work, and it is very common to use alternatives. PID is a 'starting point', but often other variants are better, simpler to code, and giving better control. I think the Naza algorithm actually...

Unfortunately the name 'gain' is used on lots of different controllers for slightly different things.... In a conventional audio amplifier the 'gain' is sometime used as another name for the volume control. In general it is the same for the controller 'gains', but as where you have separate...

Have you considered that you may be getting radio interference when the power reaches a certain level?. If this happens and the failsafe is correctly programmed, the copter will climb to about 65', as part of the RTH programming. A problem with a BEC causing the receiver supply to go...

It overloads the motors, if the props get too large. The Graupner 9x5 props are just OK. In fact quite a few people have run even larger props, provided you are a bit less than heavy handed, it can be OK, but there is an obvious danger here..... However the model can become quite hard to...

Other thing is that the accuracy of the Naza's algorithms degrades with load. It makes certain assumptions about the rate that the copter will move, and when you move away from this, you can find it increasingly hard to get good stability. I played with changing the weight of a copter (different...

If you are using a radio with programmable gain curves, this is where a bit of adjustment comes in. I like to get the setup so I can have the radio working and feeding the setup program, close my eyes, let go of the sprung sticks, centre the throttle 'blind', and if when you open your eyes it is...

Mine was in atti mode at that point. The only thing I'd changed, was I'd done an IMU recalibrate, and was enjoying how accurately the system had hovered in GPS mode. Then came out to atti mode and went for a fly, then had the flip. I've seen but can't track down some threads talking about a...

I've just experienced this flip behaviour. Ouch!. It seems that both motors on one side cut together for a moment. I've had single motor/rotor failures before, and the model drops on one corner. This doesn't it drops on one side. Seems to be the side it is possible moving slightly towards. A few...

Just a 'thank you'. Received this morning. As described. Really nice to deal with gent. :) Best Wishes

I'm in ESSEX, are you including postage in the price?. If so, email me directly at ttelmah<at>ntlworld.com, and you can have a quick sale. Best Wishes

Key is to look up what the flashing red means. Quote: "Low voltage / Other errors, _or_ Calibration or others error". First thing to do is a compass calibration 'dance'. If it is being caused by the latter (very likely after a crash), then this may well fix it. If it keeps on going, then I'm...