"Hello,
AeroVironment Puma is landing in water since January 2009.
https://www.youtube.com/watch?v=p2juPSfC2Xk
Regards,
Sergiu"

"At -48 Deg C (10Km altitude) I suppose motor overheating is not of big concern."

"I simply don't understand. Next year for sure, somebody will give us a link to
one another possible autopilot: 256 processors, 128GB RAM, 12GHZ speed. All in one chip.
Theoretically, one super autopilot  like this will be able to work with 10 video…"

"Hi
This is the code I used a while ago:

Rem Absolute pressure sensorDim Twi_start As ByteDim Alt_static As Single , Alt_temp As Single , Tmp_frac As ByteDim Mpl_dev_id As Byte , Mpl_status As Byte , Mpl_int As IntegerDim Mpl_alt_msb As Byte ,…"

"Can be used for FPV or is playback only?"

"@George P. - If you twist all cables (plus with minus,motor cables), lot of EMI will be canceled;however 2-3 deg error will be in compass when motors are spinning but can be removed in software.
@Crispin - Thank you."

"Eugenijus
So far I am one man show. So it takes longer time to finish one project than team working. On the other hand it have only my mistakes...For more info on two MCU's AP see my other post :
http://diydrones.com/profiles/blogs/xmega-ap-and-esc…"

"Euginijus,
At the beginning I made Ap's with even 4 MCU's. All of them ATmega. One was doing R/C reading, another GPS and compass,etc. I did a big step forward when XMEGA came out. With it, I made my first AP with one MCU only. It was possible not…"

"This does not look  like P (proportional gain) adjustment to me. What he is adjusting looks like Derivative gain.
Prop=Error*Gain . As long as quad is keep tilted, Error will be proportional to that tilt angle.
So when he turns the quad almost 90…"

"Right now I'm working on the code for SPI comm. with gyros.
I use (for many years ) Bascom AVR compiler."

"@ Dimitar Kolev: ADXRS453 have also (only) SPI interface"

"@ Sandro Benigno: the MOS transistors are rated at 100A. However to keep them below 50 deg C and because of the size of copper tracks, I'm not going more than 30A. At 10-15A, the ESC is cold (room temperature)."

"@  Sandro Benigno: I'm planing to make one AP more or less same with one I already made (see http://diydrones.com/profiles/blogs/xmega-ap-and-esc ) - the one with 3 PCB's and 2xXMEGA128A1 because I had very good results with this configuration.
@…"