Originally Posted by kristaps_r

I found that it is possible to write Target altitude form FeiyuTech 3D GCS software to FY-DOS. THat could be the RTH altitude.
You can also change PID parameters through this software.

That is very interresting, keep us posted please. Thank you

Originally Posted by wippo76

And? Did you test this already

Fy keeps quiet about this option

You can write Target altitude option and if reading it reads same value. Other parameter values not used are not read so I thought maybe it could work
I just received DOS and can not test it in plane, just on desk. Maybe someone already flying can check.
I used this software from FY: http://www.feiyu-tech.com/uploads/fi...0518145301.rar

Installed and configured DOS in my wing.
I have noticed that DOS has some clever RTH algorithm when there is no GPS connected. It starts turning plane. I saw this indoors while testing.
I had problems getting Turnigy Plush 40A ESC to understand zero throttle from DOS. Solved that by recalibrating ESC to bigger zero value.

Originally Posted by kristaps_r

Installed and configured DOS in my wing.
I have noticed that DOS has some clever RTH algorithm when there is no GPS connected. It starts turning plane. I saw this indoors while testing.

Very nice finding, you mean you disconnect the GPS or the GPS lost Sat. signal?

Originally Posted by rcmtl

Very nice finding, you mean you disconnect the GPS or the GPS lost Sat. signal?

I didn't have GPS connected on my plane when I tested.

Can anyone PLEASE capture NMEA log for few seconds from original FY GPS. It is easily done with FTDI adapter and some serial port console programm like Hyperterminal or Realterm. Just connect GND, 5V and Rx pins of FTDI to FY GPS.

hi guys, I describe this in my videos on the first page...

if there is no GPS signal or the GPS is lost the plane will attempt to circle... but of course it will drift in the wind.

this is possible becuase it has an onboard compass.

Steve

Anyone know what exactly is "ABM" and What is "Deactivated mode" ?

"On SW1,switch ABM to Deactivated Mode 6 times, time interval has to be less than 3 seconds as follows:
ABM→ Deactivated Mode → ABM → Deactivated Mode → ABM → Deactivated Mode → ABM → Deactivated Mode → ABM → Deactivated Mode → ABM → Deactivated Mode."

There is "Manual", "Stabilised" and 3D modes on SW1

Originally Posted by kristaps_r

Anyone know what exactly is "ABM" and What is "Deactivated mode" ?

"On SW1,switch ABM to Deactivated Mode 6 times, time interval has to be less than 3 seconds as follows:
ABM→ Deactivated Mode → ABM → Deactivated Mode → ABM → Deactivated Mode → ABM → Deactivated Mode → ABM → Deactivated Mode → ABM → Deactivated Mode."

There is "Manual", "Stabilised" and 3D modes on SW1

A=auto B=balance M=mode
Deactivated mode is = You are flying RC.

Originally Posted by epedemi

A=auto B=balance M=mode
Deactivated mode is = You are flying RC.

Thanks.
So Deactivated mode is manual mode, but Auto Balanced Mode is Stabilise or 3D or both are thought balanced modes?

Auto balance is stabilized so the plane will fly or return to a level state when sticks are released.

3d mode holds the last given angle for example if you get the plane into a knife edge and let go it will hold that position.

Yes deactivated mode is manuel mode

I understand meaning of each mode but i am confused by different naming them in User manual without explaining what they mean.

I flew first time yesterday
First I thought there is something wrong with stabilisation going down when in stabilyse mode but later I realised that I have a lot of trim up so DOS first try neutral elevator position and then realises it is going down and later levels normally. Heading lock also worked like drunk also because of trims (I had second camera on my wing).
RTH worked fine. All modes tested are working great. I will trim plane mechanically and test later.

One thing I didn't like is that DOS went crazy while plane was laying on ground. I connected battery and put my plane on ground (on car) while I was preparing other things DOS began moving ailerons in oposite direction every second. After I turned ON transmitter ailerons locked like i turn in one direction when aileron stick centered even in manual mode. After realpying power everything was OK.
I think that could be because DOS was moved from warm place to cold (-3C).

I was flying using non FY GPS with 1Hz update rate.

kristaps_r:

Dont think much about the translation itīs chinglish (horrible)

Hmm where do you get from, that the dos needs to go servo neutral before realising that it has to straighten up the plane? ( if the plane picthes down? )

The dos has a return to home fucktion when the radio is not on, that is why you saw the plane was turning on the ground.. Next time please try just changing the Modes on your radio, then it will go to that state. ( i think )

Check out the picture.

Thanks epedemi. I was too lazy to read entire manual. Didn't find Record attitude very self explaining. Could be something like "Servo neutral position"...

Any way I am satisfied with DOS. Seems it is affordable safety for plane with very good price. Even more affordable if using GPS from HK (will test it soon), and I will try to make DIY OSD that understands DOS and will show Modes, AHi ... and also voltages, curren and RSSI as alternative for HORNET.