"Yes, it should be straight forward.
Just check the manufacturers compatibility of the APM2.8 which I am assuming is a clone Pixhawk.
The APM2.6 was the last 3DR branded 8 bit controller and it still works well using the 3.2.1 version of the…"
"Be thankful of the difference.
You are more likely to have problems converting a Phantom due to their cheap non standard ESC's.
If you decide to go the Pixhawk route then get a small PWM to PPM convertor (couple of bucks on eBay) and you can still…"
"You have a working airframe, so your build is mostly done.
If you put an older APM in then the Rx will just connect straight to it.
The Pixhawk on the other hand uses PPM input so you need a PWM to PPM convertor.
Stick a GPS somewhere and your done.…"
"Have you checked the power module under load?
It sounds like the power module is failing when load is applied.
Have you checked the current draw on the power module?
The standard 3DR power module is only rated at 500mA, so a check of the current…"
There is always slight variations in outputs due to variations in the level of the FC.
It's not until it is flying that it can use sensors other than just the gyros, so your best bet is to fly it, after making sure everything moves in the…"
"What firmware are you using?
Have you checked the radio calibration page on your GCS?
Is the throttle and roll moving as expected?
Have you tried recalibrating your radio?
In the HUD on your GCS does the horizon stay level?"
"I had a power module blow out and did much the same thing to a Pixhawk.
It would actually still boot and fly quite well, you couldn't connect to it.
I could identify the chip that got fried, the multiplexer I think, but unless you could rework the…"
"120A on the 4000mAh30C is right not he edge, you are working it to it's maximum stated capacity.Not a great way to treat the battery and I would watch your discharge and temperatures carefully.
Your 16000mAh10C is rated at 160A so not so bad BUT…"