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Old 03-11-2018, 11:03 AM   #1 (permalink)
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i have been flying vbar for a little while but while it flies great i'm not learning anything about tuning \so i want to give the cgy another go , i liked how it flew but struggled with a tail issue (mine) in tik toks , so i have it installed in a synergy 516 its mostly setup , just need to set pitch and collective, everything is moving in the right direction, is there anything i should look out for and what are some good base numbers to get me started
Anthony
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Old 03-11-2018, 06:16 PM   #2 (permalink)
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Start with the recommended settings BUT you MAY find you need to run a bit more swash rate (cyclic) than suggested in the manual. We found that the ideal cyclic range for smaller models can vary with blade type. If it were I, I would set it up with 8 or 9 degrees of cyclic, fly it, and then we can tune from there. I know that the model was very well optimized for the 516.

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Old 03-11-2018, 07:40 PM   #3 (permalink)
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hello dr ben , been a while , thanks i will do that
Anthony
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Old 03-13-2018, 07:51 PM   #4 (permalink)
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so the maiden went well , straight lift off and smooth controls , i did flips and rolls to see if the heli was performing correctly and ran into my first issue. the roll rate felt good but the elevator felt sluggish, the roll rate on landing was 314 d/s but the elevator was only 236 d's , now i know the heli is more capable than that so its something i did wrong in setup . i have checked all the defaults and they all appear to be set correctly . any ideas as to where i should start to look
Anthony
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Old 03-13-2018, 08:05 PM   #5 (permalink)
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i have 8 degrees in the swash rate menu , should i try more?
Anthony
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Old 03-14-2018, 08:11 PM   #6 (permalink)
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i went with 9 degrees today and had a quick flight just to see if it made a difference , i had 299 with aileron and 270 with elevator so should i keep increasing the swash % a couple at a time until i get 300
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Old 03-14-2018, 11:18 PM   #7 (permalink)
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Anthony mine was too fast rolling and I asked that question and received this tuning suggestion

Robert explains it very well. If your looking at the values then it will totally make sense.
Post # 3 & 5

Ring me up tomorrow if you want . I might be able to help a little.
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Old 03-15-2018, 06:12 AM   #8 (permalink)
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its starting to come back to me , i had forgotten about those threads , good reading
Anthony
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Old 03-15-2018, 08:45 PM   #9 (permalink)
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so i tried adjusting the sws rate , with my setup 268 was the most i could get with elevator so i set it to 265 , i feel like that's about 12 degrees of cyclic which is the same as the pitch , should i try increasing the pitch , would it make a difference to the amount of cyclic i have or does one thing have nothing to do with the other.
i also feel like the climb out is a little slow is that a feel thing or is there a way to tell if there's too much or not enough pitch?
rudder feels good.
oh and just fyi its a synergy 516 running 516 blades at 2100 rpm and i have the speed up gear for the tail
Anthony
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Old 03-15-2018, 11:30 PM   #10 (permalink)
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If you lay the heli on its side on a table with the blades hanging yet then go to full pitch and measure the distance between the tips.
250mm is about 14 degrees 267mm is 15

For that head speed you will most likely want 14 at least and even as high as 15-15 1/2 if the mechanics allow.
Now before anyone get on a rant , your not typically flying full pitch and for sure not mixing cyclic and pitch at the Same time because that spells trouble.
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Old 03-16-2018, 05:09 AM   #11 (permalink)
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i was going to try that next(more pitch) to see if that made a difference but will it affect the flip and roll rate or just how fast it climbs
Anthony
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Old 03-16-2018, 07:52 AM   #12 (permalink)
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Yes It would only effect climb rate.
You may try control authority elevator and bump it up a little at a time
It's in the flight tuning ContrAuthE for elevator A for aileron.
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Old 03-18-2018, 09:56 PM   #13 (permalink)
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Whoa.

Running the swash rate that high will make the model fly terribly. If you are not getting set rate at 10 degrees, then the model will not command the rate at your chosen headspeed and with your blades. All running excess cyclic does is load the head up, make a bunch of noise, and make the model unpredictable.

Collective range has no effect on cyclic rate assuming correct flying technique.

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Old 03-20-2018, 02:07 PM   #14 (permalink)
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so I decided to try everything stock , so I went back to the stock pinion and tail gear ratio and 11 degrees of pitch with 9 degrees of cyclic , because I think number 1 I don't know a lot about tuning but secondly going lower headspeed is another variable to deal with , so I flew this morning and the only bad habit I could see is in an upright punchout the tail drops , the harder the punch the more it drops, it comes down vertically and doesn't do it from inverted,
I did take a look at the advanced swash menu and tried to adjust the pitch-ele so that the ball was stationary at full collective but I couldn't get it to stop moving, I will have another look at that tonight, what was odd was that it seemed to start straight then the tail had a noticeable drop as if one servo was slow near the end of its travel , other than that it flew nicely
Anthony .
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Old 03-21-2018, 08:55 PM   #15 (permalink)
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is it ok to use 150% for the swash ring. there is no binding at top middle or bottom collective , or should i stick with stock
Anthony
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Old 03-22-2018, 09:23 AM   #16 (permalink)
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I've never changed that from stock.
The best thing about the CGY is typically will fly well to excellent right out of the box stock. They took a lot of time to get the stock settings really good before they release it.
You might want to reach out to Rob or Matt directly since they both fly it on that model.

Matt has been super helpful when I've reached out to him. Ton of knowledge.

Maybe verify the balls on the servo arms are far enough out.
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Old 03-26-2018, 07:58 AM   #17 (permalink)
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so after a complete re-setup , I moved the balls out on the servo horns , I was at 13mm and now I am at 17mm for now , iv'e ordered some 16mm ones . I also now have 12.5 degrees of pitch and 9 of cyclic. , which is 38 and 50 in the cgy(not ideal)
flew this morning and pitch pump problem is gone , if left alone in a hover the tail starts to drop and also leans a little to the right , not worried about that yet as I will be changing the servo horns in a few days which I think will help . what I noticed is that in full collective funnels the tail blows out . I haven't tuned the tail yet so does that mean I don't have enough gain or not enough tail blade?
secondly when i'm autoing the tail bobs up and down , what does that mean? at a guess I would say too much head gain but that's just a wild guess.
Anthony
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Old 03-27-2018, 07:53 AM   #18 (permalink)
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If it doesn't hold a hover be sure the swash is perfectly level at zero, also vibes can effect it.
The bobble in and auto might just be tight dampers.
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Old 03-30-2018, 08:15 AM   #19 (permalink)
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so after a complete redo of the setup (all back to stock) new swash( got damaged in the crash I had because of the tribunus, not impressed) re leveled everything and checked for level at top and bottom ,the most flip rate I can get is 255 degrees p/s which is too slow . I really want to like the cgy but now I know why I gave up on it , it just doesn't tune the way its supposed to.
I increased the swash rate and managed to go from 248 d/s to 255 d/s with about 3 or 4 degrees more cyclic rate . all it did was make more blade noise , what is wrong? I know the machine is more capable than that
Anthony
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Old 03-30-2018, 09:13 AM   #20 (permalink)
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Sound like something is off. Mine flipped way too fast for me to start with. I had to tone it down.

Are you in f3c mode maybe?
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