wpmcnamara
New Heliman
Location: The Colony, TX USA
| Ok, let me preface this by saying that I have been reading on this for the past week. Let me also say that the signal to noise ratio on this topic is very low. I need suggestions from the pros, beyond "it's a piece of junk, upgrade".
I have a Blade 400 with the stock G110 gyro (remember, no upgrade suggestions). I HAVE upgraded the tail servo to a DSP75 and switched the gyro into digital mode. Tail linkage is on the middle hole on the servo arm. Everything else is stock.
In "normal" mode, the tail is very well setup in rate mode. It will hover hands off the left stick for about 20-30 seconds in rate mode with no trims. Rate mode gain is about 39% (30.5% remote gain setting on the DX6i). In heading hold mode, I've got no tail wag. HH gain is about 34% (67% remote gain on the DX6i). Based on what I have read, if you have a good setup in rate mode (no drift/no trim), heading hold should be spot on or pretty close
Now for the problem. I have to put about 5 click of right trim on the rudder to keep the nose straight in HH mode. If I trim out the drift, then the nose holds straight and doesn't drift. From what I have read, this translates to the gyro having a different idea of what center on the rudder channel is than what the transmitter is sending. Further strengthening this thought is the fact that is I power up the system and don't move the heli at all, switch to rate mode to center the servo, then switch back to HH, the tail pitch slowly changes back to pretty much zero pitch. Unlike what others have said, it doesn't continue to change (the key here being that heli hasn't moved at all since the gyro initialized). This is the behavior I would expect, except that in HH mode it should drift to the same center point as in rate mode.
Again, based on reading, if the gyro is interpreting center rudder as something off center then you need to re-initialize what the gyro thinks is center. This is where things start to get fuzzy. Documentation on the G110 is pretty well non-existent. I have found reference to the gyro re-initializing it's center point during rebinding the transmitter. Tried that with unknown results. When the XCVR is powered up in binding mode, the LED on the gyro flashes. The XCVR binds and arms and all the head servos respond as expected. The tail servo is still locked out though since the gyro hasn't initialized. If I power down and up, the gyro inits normally, but it doesn't seem to have changed behavior at all.
I've tried to include all the information I could think of, but here is one little more piece. If I switch to idle up, I have to give serious right rudder in both RM and HH modes (I haven't figured out how much trim it would take yet), but more in HH mode. I would have expected that in rate mode, what works in normal should work in idle up.
So, the big question: what am I missing? Secondly, does anyone have decent information on the G110 about how to reset center, powering up in rate vs HH, what the LED blinkies mean, etc?
***EDIT***
Here is the G110 Manual. I haven't read it fully yet. |
It seems to be getting easier and easier to find now though. Still don't know what the blinking LED after binding means, but after reading through the manual, I think I've got it right -- at least for standard flight mode.
