"Thank you Kent,
It's good to hear that 2 RFD modem can work in the same drone. No, for sure I'm not using for PPM control, only for telemetry and other data transmission."

"Hi Seppo,
Can I use 2 RFD modems on the same drone (of course, on different channels). May they interfere each other?"

"With the same output power, the 433 frequency range should have longer range than 900 frequency range because the path loss is less"

"I agree with you that  the response of copter/plane to the joystick action would be a bit delayed but the range of flying with joystick is much longer than the traditional RC. I think with 3DR or RFD900 modem it should reach well some kms."

"If you want to access flight modes through the "Setting" menu then select the first line "ChangeMode" in the first drop down menu."

"Then you need to copy files to the directory where Mission Planner was installed because MP retrieves those files from there. "

"Can you save the joystick configuration in the end?"

"I think this is an error of MP, it saves joystick configuration in one place but initializes in another place. In my case, it saves joystick configuration in joystickaxisArducopter2.xml and joystickbuttonsArducopter2.xml files in folder…"

"I haven't got support from 3DR, but after reading other posts on the forum, I decided to replace the SD card. After replacing SD card, all things went well."

"Thank you, I'll follow your advice."

"Hello all,
I have the same issue. I have a pixhawk board, I could upload AC3.2 firmware but then I can't connect the board to the mission planner. I tried different things: connect/disconnect GPS/compass modul, tried on different USB port, even…"

"In that commit I don't see the fix for correct_with_baro(). In the commit we've checked if buffer if buffer is full then get the delayed sample at the front, otherwise get the current sample. If the buffer is not full it's true that we can't get the…"

"Now I've better understanding of the code, including AP_InertialNav library.So here I include the new pdf file.Quadcopter.pdf"

"IMO for the cyclic buffer with the number of samples = size = 15, the delay is 15 samples, so if now we get the baro data, it means that the inertial calculation for that data was 15 samples ago, or it should be at the beginning of the buffer, the…"

"It seems that no one wants to reply. May I ask from Randy, an expert in this field in my view, that what does he think about this issue, am I right or wrong?"

"There's still no replies at all. I'd like to know at least the viewpoint from anyone in the development team. I don't know the 3rd order complementary filter algorithm and highly appreciate if anyone can provide the link to that algorithm…"