Hi Gents,
Point of order regarding previous posts in this thread... During a normal front=sky, rear=ground TI calibration, the rear and front thermopile sensors are looking for (IR) temperature differences and holding that in memory for use as ground is X-temp, sky is X-temp. Then the processor uses that to figure along with the right stick down and to the right level cal as constants. So in flight it then calculates, if the (IR) temp on my left is less than my right I need more speed on X-props and less on Y-props, etc. Bottom line...If you calibrate the DF sideways, you are doing it wrong.
There is some good info on DF and TX exponential and EPA and dual rate setup, even though it is the brushless version, in this thread over in rcgroups:
http://www.rcgroups.com/forums/showthread.php?t=768115
As for the glitching you are seeing, after checking your brushed motor caps as was suggested, I strongly suggest you check the diode between the riser and switch on the DF board:
http://www.rcgroups.com/forums/showp...&postcount=941 and here:
http://www.rcgroups.com/forums/showp...&postcount=982 That diode's solder joint can be cracked by the riser/vibrations/hard landings, (on all my boards it was originally mounted up against the riser which tends to vibrate and bend in "hard landings", causing the diode's solder joints to eventually fail. That will supply intermitant power to the DF board and cause glitches/crashes/resets. It is worth the effort to remove the switch and move the diode over farther away from the riser and towards the switch (it is hard to see between the slide switch and riser on the left rear of the board).
Other hints, put an aluminum bar stock roll cage or thick coat hangar wire cage on to protect the board. The receiver antenna is a mere 1/32 wave length with no loading! Wrapping a 40 inch length of antenna wire around a straw is better than the stock setup. Too much TI sensitivity dialed in is not your friend, especially in winds gusts 15-20k. Turn the TI sensitivity lower in those conditions or if flying near trees and buildings. Note that there is a warning in the manual not to turn TI on or off in flight. There could be a very different trim requirement for each and turning it on or off inflight "could" cause a crash. TI is something that works great to assist you in hover when the DF is just a dot in the sky waaaay up high.
Cheers,
Jim