"Sapog does not support field-oriented control, it never did. We first implemented this technology in PX4ESC and then in Telega.

Ah, right.  Sorry, I hadn't realised that Sapog was never FOC, and was wondering how you had managed an additional boost…"

"Is Sapog still using field-orientated control?"

"Very nice work.

Overall, I think your component choice is very logical for an affordable platform.  I have what I hope is constructive feedback for the next generation:

Breaking out the second CSI connector would allow for an extremely affordable…"

"Consider the ethics of marketing a design with detailed specifications (endurance, payload, speed etc.) for a device that clearly hasn't been constructed or tested. 

From my perspective, you have a responsibility to verify your design before taking…"

"Sampling a 4kHz signal at 8kHz will resolve issues with aliasing, but you also need to consider how MEMs devices actually work. There’s a harmonic response at a hardware level that can distort measurements in a way that can’t easily or accurately be…"

"For extended endurance applications, a big component will be the TBO (Time Between Overhaul) of the internal combustion engine.  I work with sUAS in conservation applications, and I think this product could potentially bridge significant performance…"

"Aerospace grade, implying AS9100 certification or equivalent, doesn't relate to maximum performance.  It relates to verified reliability.  

There's nothing stopping Drotek doing the work necessary for Pixhawk 3 to receive aerospace grade…"

"Generally good information, but there's a few discrepancies. For example, PPP isn't necessarily a paid service. Many receivers (including the ublox M8P) have a PPP mode that will produce an accurate position solution without commercial…"

"It's an interesting concept that will definitely find a few applications.  I have some constructive feedback based on my personal experience and understanding.

For hobby FPV, the whole point of flying a drone instead of using a simulation is the…"

"@Dmitriy, I'm not sure I understand your comments on dual frequency GPS systems having a faster initialisation times, or comparable accuracy to single frequency systems for PPP solutions.  

For dual frequency commercial units (L1/L2) from other…"

"Keeyen, you should be able to use PPP mode (Precise Point Positioning) of the Reach RS to find the base station location with accuracy in the decimetre range.  This doesn't require an external correction signal.  Instead, it uses the known positions…"

"Great work Philip, team, and everyone else involved in testing and Ardupilot porting. I fully expect Pixhawk 2.1 to become the de facto standard for small commercial UAS."

"@Thomas, seems the schematic and board files (Eagle format) are available from the PX4 github page:

https://github.com/PX4/Hardware/tree/master/sapog_reference_hardware"

"@Jesus While I see what you're saying, and certainly agree that it was 3DR's right to do whatever it wanted, my feedback here is motivated by a desire to have seen them succeed, and frustration at some of the decisions made which in my opinion lead…"

"To add to that sentiment: It wasn't just the hobby market, it also included customers like NASA, Universities, researchers, small businesses, and startups.  If DJI couldn't do what you needed, 3DR and Ardupilot was the obvious choice.  We were…"

"They're going up against Drone Deploy, Airware, Precision Hawk, and Propeller, who are years ahead in terms of development, and haven't wasted their VC funding on failed ventures.  Additionally, they've abandoned the ArduPilot devs who enabled them…"