I just tuned the linkage again and its the best so far.
Its -12 0 +12 mechanically. there is no binding anywhere even with 7 degrees of cyclic at the top and bottom. everything is square, bubble leveled and paralled and finally its 0 at 50% stick mechanically.
anyway onto the question if the heli is balanced front to back and left to right can I trim the swash plate for the drift in the hover ?. aileron is the main one the I want to trim mechanically.
I have to track the blades still but I have feeling that I will still get a discrepancy between the blades at the extreme pitch range. its ever so slight but its there.
BTW its a x-cell se

-12 and +12 Wow, What motor are you useing? Whats the advantage of trimming mechanically vs. moving the trims or subtrims and them useing trim offset?

Rick

mechanically is always the best way. it takes a little longer, but when done you know you have no mechanical advantage one way or the other. unless you need that for speed or torque. if your geometry is off then you have to trim or curve the servos to work the way that you want them to. ie: pitch comes in to slow or fast then you curve it so it feels good, but then are hideing a bad setup and not getting the full power out of your setup?.

Most people use trims to hide a bad setup without even knowing it. I see it all the time in planes. now that I am starting to understand how a heli works for the most part . You can really hide a bad setup very easy with these new high end radios and all the geometry in heli's. So you can see how easy it would be to over work or under work a servo. so why not make it mechanically symetrical just like the blades -12 to +12.

My heli is a X-cell SE. it has a new OS 91 on a 980 high volume Hatori pipe. I have the 8.18 gear ratio turning rotor sport 700's (a little undersized) on 30% power master. there is a 601 and a GV1. 8411's on the fore and aft, left and right cyclic. and one more on the throttle. the one one the throttle is a little over kill, it use to on the collective but it was stalled 6 times. 2 of the 6 stalls were very hard stalls (dont ask). neadless to say there is a new 8411sa on collective.
12 on the bottom 12 on the top 7 for cyclic and 22 degrees on the paddles. blades are 174g and the paddles got bumped from 17 to 32.
All I can say is wow this beast can pull the biggest loops, huge stall turns and not to mention some mean 3D. pull verticlely close to the same speed as my something extra (2.5 horse pumped, piped 61 on 30%power maseter turns a 13x9 at over 14000 static.) its a little silly but a whole lot of fun. That would be a good race hmmmmmm ...... the extra did a full power ground launch, about 12 seconds it was pretty much to high to see to be controlled. Its got me thinking what one climbs faster ? could be the heli or could it be the silly plane. anyway its late ive rambled enough.

Sounds like a great setup. I have my CS set up with 11+ and 11- with my YS.80 using the John Holmes KSJ muffler and a GV-1. A total animal, you can't load the .80. 700 V-Blades @ 186g. V-Paddles very light 16g. 8411's all around with an 8700G for the tail. I have some 8411SA's sitting here for my Voyager 50 when Horizon gets them in stock. I have to admit I have a few clicks of trim here and there I think 2 L and D 6 is the most. Using JR links I think one whole turn would be too much to correct it mechanically. I can live with it. Is your 91 smooth? I have been reading that some 91's have been rough and shaking some heli's apart. Probably just a very rich break in setting is the culprit.

Rick

Yahh it was pretty rough the first tank even at idle.
I have the engine about 1.25 trurns on the needle its still very rich but alot smoother.
when I added the last degree of pitch I had to lean it out one click to hold the head at 1850 in a climb out. I think the carb is open all the way cause man the smoke is just huge and the engine sounds like it fires every 4th stroke.
what gear ratio do you have ?.
these new engines are amazing. the 91 has almost three gallons on it so far and it has'nt even hinted at a bottom end tweek. the top end is rich like I said. what is weird is that the mid range has a very clean but not lean sound to it. I think they might have it right with the timeing cause so far this engine is a no brainer to set up.

When the .80 was installed I went with 8.8 ratio. Seems right in the ball park. Some have tried the 8.4 and seem to like it. I dont need a head speed above 1800, the .80 at 8.8 can deliver 1800 and crank a rpm in the 15,000 + range which is well with in it's specs.

Rick

vince
what is your question? it sounds like you have it all figured out? btw i have a high speed servo on my throttle, which i believe is important, especially if you use a governor.

I got a chance to fly today and the sensor fell off.
the throttle had to pulled back to 70% so not to over speed the engine and that was pulling 10 degrees of pitch. and it still is very rich