You must have a ham license. Please get one. I got mine so that I could use these frequencies legally. The information on the test is very interesting and relevant to your drone activities. We don't want the drone community spewing crap into the air waves without knowing what they are doing. That'll be just one more reason for politicians to regulate our activities.
I had exactly the same problem ... lucky there was a tree in it's way so it crashed!! I had a Log file ... still don't know what when wrong. See my post : http://diydrones.com/forum/topics/first-flight-crashed?xg_source=ac...
What did I not read in the manual?
That is a very good question, one I'm glad you are asking. However, it is better to ask that of yourself, not of me. I could not possibly tell you which sections you did not read. I do, however, believe from the issue you describe and your reaction to that issue, that you will have read too quickly, if at all, several important sections. I recommend reading the entire manual, ideally more than once, and that you review it before each planned fight test. I recommend that you approach each flight in which a new feature is going to be employed methodologically. The specific error made here, I believe, is launching and then enabling an automatic mode of flight before you completed the recommended series of tests of intermediate flight modes, specifically Alt Hold and Loiter, and before you have the opportunity to learn about various versions of throttle control that differ between flight modes, and before you learned about the importance of (a good) GPS lock, of validating your sensor data in your specific electromagnetic environment, given your platform, wiring, and power arrangements, when static and also when in flight, and finally of the importance of various configuration parameters related to the flight modes you were employing when you switched into RTL.
I have read the manual more than a few times and did all the callibrations, tests, ect. Also did a few tests where I just Take off and land to see motor direction ... bla bla bla. I don't think that I missed anything "in the manual". I did everything in the manual and did a lot or "research" on this forum ... but the RTL acted strangely!!
Sorry to hear you lost your quad, that sucks man. I just had the same thing happen to me. Flew it for a few mins testing loiter and RTL, all worked perfectly. Then I disarmed and disconnected the battery to mess with the cheap hobby king wing cam. Powered it back on waited a few mins just to make sure of a good gps lock (all the lights indicated it was so) then took off, first I switched to loiter and it started to head off so I switched to RTL and then it really took off heading to who knows where so I quickly switched back to stabilize mode and tried to bring it down gently. No such luck, since I couldn't see it clearly it went down a bit too fast and hit a chain link fence 150 yards away. I was able to retrieve it with just one broken prop. Going to put my info on it now per Richard Boyhan's suggestion. At least I got some good crash video lol.
Well there is your problem right there!
Those hobbyking wing cams SHOULD NOT be used anywhere near a GPS unit!!!
I was using the 720p HK Wing camera extensively with GPS for quite some time now and I did not see any problem.
I am using Venus638FLPx GPS and the camera was as close as 15cm from the unit.
It could be possible that your GPS is sensitive to some other frequency than L1.
Would have to run the camera on spectrum analyzer if needed.
I have got the same cam and gps. And the same problem