"Agreed.  I'm guessing the plane is flying below the specified cruising speed (TRIM_ARSPD_CM) when he enables an auto mode and is diving to speed up."

"I like to use Amazing Goop to strengthen hinges and leading edges on EPO foam models.  Just apply a very thin coating and let ti dry.  It slightly melts the surface of the foam and forms a very tough "skin" over it."

"Just another thanks for sharing these.
I started with your STL file and modified it to directly mount a GWS S125 1T servo and angled the bottom to not block the view of my FPV camera.

See attached photos of it on my "clipped-wing"…"

"The best answer is to upgrade to a pixhawk.  Its log is on the sdcard and therefore essentially unlimited in size."

"I live about 30 miles from the stadium and on Sunday around 2pm an F-15 performed an intercept of a Cessna 172 right over my house.  It was pretty awesome as they were both less than 1000 feet or so AGL."

"Try a log file instead of a bin."

"I haven't tried it, but I think this may be just what we're looking for:
https://github.com/OverloadUT/apm-dashware"

"That sounds like your ESC is overheating to me.
If the ESC doesn't have "active freewheeling" it will actually heat up more during partial throttle operation.

I recommend you try an ESC with that feature.  (I use the YEP 80A escs on all of my big…"

"The fix is to buy a pixhawk or a pixhawk clone which has an SDCard.  This is just one of many reasons not to be using APM any more."

"If you have an airspeed sensor fitted, was your pitot tube covered when you powered the plane up?  The firmware trys to auto-zero the AS sensor at power-on and wind on the pitot at that time can give you falsely high airspeed readings."

"How much effort have you spent balancing your motors and props?  That's the first line of action."

"Do you have any transmitters on the plane?
For example:
RC Receiver with telemetry.
Telemetry Radio
FPV Video transmitter

If so, make sure their antennas are at least a few inches from your GPS antenna.

If it's not one of those, I'd suspect your…"

"Arming was changed in 3.3.
http://ardupilot.com/forum/viewtopic.php?f=110&t=12425
http://plane.ardupilot.com/wiki/arming-your-plane/"

"I had this problem with a 3DR radio causing the tail servo on a tricopter to twitch (high speed coreless digital servo in an aluminum case).  I moved the 3DR radio from the tail boom to one of the front booms and the problem was fixed.

Since the…"

"Is terrain-following working in the copter code now?  I know it is in the plane code and would explain that sort of behavior.
Do you have terrain-following enabled?"

"I've had this happen more than once in the past (before stall prevention was added).  If you switch to manual fast enough you can recover.

Since you had it happen with stall_prevention enabled, you either didn't have your airspeed sensor well…"