Information in reference [21] is really serious. It makes me question the near-term as well as long-term viability of Yuneec International. But I'm not anxious to switch allegiance to elephant in the room.Yes this is old news.
In May 2017, suppliers reported that the company was arrears, but the company said that it was mainly due to the two sides had different opinions on product delivery quality and payment details.[19][20] On the other hand, nearly half of Yuneec's suppliers had not been paid for more than a year. Yuneec has not made supplier payments on time since the second quarter of 2017.[21]
Hello everyone,
@Rubik and all of you:
Yes, Yuneec telemetry is reporting wrong values of GNSS accuracy.
It's not that Yuneec is cheating on us. I spent several months investigating this problem. In fact, in my first tests, I could not believe how to a GNSS module of $ 60 could give better results than a $ 300 module. This problem lies in the way in which the original GNSS chip delivers the information to the flight controller. Yuneec uses the GNSS Ublox MAX-M8Q chip in its models, and it is preconfigured for high navigation speeds, i.e, it has enabled "Airborne" dynamics corrections in chip, so the results of position calculations are corrected before they are processed by the flight control board.
Here you have Ublox official datasheet for M8Q serie, look for "Horizontal Position Accuracy":
![]()
Ask this: How can a chip that officially has a maximun horizontal accuracy of 2.5m give you values under 1m?
Another image. This is an sniff from original GNSS board of Typhoon H. The difference is that now it is configured as "Stationary", i.e, it do not correct any value as it is placed on the outside without moving. Look for the value "3D acc" at the right upper side of the image and examine the other values at the center of the image. I am sure that the results will surprise you:
![]()
In best conditions, for our drone use, M8Q do not get accuracy value below 3m.
And at the end, here you have again the explanation and types of Ublox "dynamic platform" corrections:
![]()
Hope this clarify your question.
Regards from Spain,
Dario.
Hi Dario,Hello everyone,
@Rubik and all of you:
Yes, Yuneec telemetry is reporting wrong values of GNSS accuracy.
It's not that Yuneec is cheating on us. I spent several months investigating this problem. In fact, in my first tests, I could not believe how to a GNSS module of $ 60 could give better results than a $ 300 module. This problem lies in the way in which the original GNSS chip delivers the information to the flight controller. Yuneec uses the GNSS Ublox MAX-M8Q chip in its models, and it is preconfigured for high navigation speeds, i.e, it has enabled "Airborne" dynamics corrections in chip, so the results of position calculations are corrected before they are processed by the flight control board.
Here you have Ublox official datasheet for M8Q serie, look for "Horizontal Position Accuracy":
![]()
Ask this: How can a chip that officially has a maximun horizontal accuracy of 2.5m give you values under 1m?
Another image. This is an sniff from original GNSS board of Typhoon H. The difference is that now it is configured as "Stationary", i.e, it do not correct any value as it is placed on the outside without moving. Look for the value "3D acc" at the right upper side of the image and examine the other values at the center of the image. I am sure that the results will surprise you:
![]()
In best conditions, for our drone use, M8Q do not get accuracy value below 3m.
And at the end, here you have again the explanation and types of Ublox "dynamic platform" corrections:
![]()
Hope this clarify your question.
Regards from Spain,
Dario.
We use essential cookies to make this site work, and optional cookies to enhance your experience.