"Yes I was a Captain for Bristow Helicopters flying IFR equipped North Sea heavy helicopters (Super Puma) and also have friends that fly SAR (Search and Rescue) helicopters with even better autopilots than we had. Ours were SFIM or Honeywell-Sperry…"

"Interesting but I wonder if that is entirely true, as if you are navigating from lat/long to lat/long, then being stationary is irrelevant as the track is a simple calculation and the heading can be determined after a miniscule movement i.e. 1mm. In…"

"This may be a daft question, but why do you bother with a magnetic heading when using a gps or inertial, nav as they can navigate with true bearings and not unreliable magnetic ones?"

"Thanks for the explanation Paul. No it doesn't look like xrf's support that. I am not sure if it is an angle thing could be, although XRF's are more versatile than xbees, we have more success with the XRF's and have stopped using…"

"Brenden, what do you mean by ECC? Is that encryption? in which case no we don't. We use XRF's at 58k on the arduplane and 115k on the quad, both with data rates of 250kbps. The quad works fine the arduplane nearly always gets errors…"

"We get the same issues Brenden, so it is not an isolated event. We have also yet to get to the bottom of why arduplane suffers with telemetry errors when arducopter doesn't seem to with waypoints. We often have issues trying to change…"

"Thanks Paul I will try that, it works perfectly in all other modes and we had adjusted settings to get it to behave nicely but were puzzled with the air brakes."

"Roberto S, this is going into the wrong thread for some strange reason so had to put it as a new post! There was discussions about that awhile ago, it is to do with the throttle trim setting I believe that the autopilot thinks it needs compared to…"

"Yes, strange why it appeared in you thread, definitely pressed the reply button on Robertos thread, weird!"

"I wonder if anyone can answer this for me please... We use an X8 flying wing with air brakes fitted which work great. I was curious to see that when the air brakes are extended in stabilized flight, the air frame behaves almost exactly the same as…"

"Just a curiosity question about the loiter, having trimmed out the bad habits for this release the loiter is not bad at all, certainly acceptable for what I currently need it to do. However, when I am in a stable hover and then select loiter the…"

"That's what I looked at and unless you have the adapter cable or board you need to do some soldering!"

"I wasn't aware of that. I'll try it again and see how it behaves and if it gives me trouble then I will set that to 0 and try again! Thanks."

"I looked at that pdf and it wanted me to connect to the gps port, but I don't have the required ftdi cable adapter. I didn't see anything about using just the usb cable to the apm! I'll look again."

"This is the parameter file from my tests yesterday. It was a strong wind and I haven't tested it again today as rain stops play. I also have not upgraded the gps firmware yet, waiting on a cable as I don't fancy soldering the board."

"Played around some more with 2.9.1b settings today and ended up with a very stable loiter even in strong gusty wind conditions so no need to go back to 2.8.1! I also haven't upgraded the gps firmware yet, so very impressed. Thanks for…"