ORIGINAL: BigNed
Hey Chip,
I have a Futbaba 9C. On my U CAN DO .60 I have a problem with the endpoint adjustment between high and low rates on my elevator surfaces. Whenever I setup endpoints to match up the elevator travel on low rates, the high rate ep throws dont match up. In other words, at full throw low rates the end point of travel matches up perfectly, but when I switch to high rates and give full up or down the sufaces may be as much as 1/4" off. Most of the misaligment occurs at that last, say,, 10degrees of throw.
Question,
Do you know if the 9C has the ability to set up different endpoints on different rates? If it does I cant find it.
If it doesnt, is there something mechanically that I may have out of square? I have done all I know to do and I cant figure it out.
My quick solution has been to get the endpoints adjusted out on high rate and then just live with it on low rates since I seldom use full up or down elevator on low rates.
Im hoping that I have something mechanically setup wrong that will correct this.
Thanks,
Mike
Mike,
I am thinking you are using two seperate channels for Elev, and mixing with the TX. Before we go any further, I need to know what 2 channels you have and the mix you are using. I know the 9C is different from the other Futaba TX's in the way that this is done, but it actually works the best. Also make sure all servo arms and control horns are exactly the same from side to side, as well as the angle that your linkage is at from the servo arm to the control horn. This stuff is the most critical to have as close as possible to each other from side to side.
If one servo points up, and the other down, the best you will ever get is just going to be close as far as equal throw is concerned. Make sure all your percentages are at an even 100, as well as zeroing out your subtrims. If nescasary change servo arms until this is done. At this point I would have to say you should be able to do a little fine tuning with your ATV's and you'll be set.
Please double check to make sure its not one Elev. just being hinged a little tighter then the other, I have had that happen, and it will drive you crazy. One last thing, don't settle for anything less then equal travel on high and low rate, there is always a way to get there!!!!!!!!!!!!!!!!!!!!!!!!!!
Let me know
Chip