It's interesting to read the above as I have also been experiencing odd behaviour when using Delta 8's with my Futaba 10J. Today I tested all of my eight Delta 8 receivers against four of my Futaba 2006's and 8006's. The Futabas worked flawlessly but ALL eight Delta 8's stopped controlling the left aileron intermittently after a few minutes of operation. The left aileron on all of my models are being controlled Independantly on channels 6 or 7. They stop responding and lock up for a split second up to several seconds. Long enough to lose control and crash. I bought the 10J 16 months ago and I've had random incidents ever since. It's been a difficult fault to pin point as the control surfaces work fine for the first few minutes. Long enough to get airborn. Then things start to fail and get progressively worse over time. It's as if the receiver starts to buffer and then freeze.
I spoke to Futaba who were aware of issues with third party receivers. They explained that there has been changes introduced to their 2.4Ghz transmitters coding protocol to comply with new frequency laws. The new laws came into effect in January 2015. They suspect that some third party receivers are less compatible with the newer Futaba transmitters. They advised me to contact FrSky to enquire about a firmware upgrade for the Delta-8 to fix the problem. I spoke to T9 today but they told me that they are unaware of any issues with the Delta-8's and Futabe J series transmitters. They also said they were unaware of any firmware updates to correct the coding protocol.
I'm now waiting to hear back from FrSky. Hopefully they can do something about the eight Delta-8's I purchased.
I hope this helps anyone else who has been tearing their hair out due to months of frustration.
