Hi yall,

So I have been putting together different builds around an arducopter v3.0.1 using APM 2.5.2. So far I have had at least 20 great flights using different builds including a H-Quad frame and a RcTimer 450.

Yesterday, I took it out to try some new batteries I ordered from Hobbyking: both are Zippy Compact brand ::  5000mah 3C and a 2700 4C.

I should tell you our front that I am using a mix of ESCs all 30a but a few differnt brands. Rctimer and Phush...and a Rctimer OPTO. So anyway, when I was flying a 2200mah 20c battery everything ran wonderful. But when I put the 2700mah 4C it was uncontrollable. That should be expected for a very light weight 450 with 1300Kv motors and 9x5.0 carbon blades. Anyway, the latest issue seems to be an inteference issue (i think). I was flying it in a park that I usually fly at and it flew for a while then just dropped.... like flipped over to the ground from about 20 feet. It did this again after I calibrated the ESCs on the spot using APM. 

Anyway, this is just a basic 450 with APM and gps Cirus ublox which all seemed to work really well. I amd going to try some different stuff. I am not sure how to download the logs so I can read them in and do some more analysis.

I am going to include a pic I just took of the craft. Any input would be more than appreciated. Hope everyone is doing well.

-mark