rotarydoc
Posts: 1972
Joined: 3/17/2008
From: Laurel,
MD, USA
Status: offline
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Hi all,
I was so disappointed with the CPP's performance (and mine, truthfully) yesterday, that I FINALLY decided to take a good look at my settings, rather than just fly it and try to compensate for what might be a setup problem. In all honesty, I have just been flying this thing on a seat-of-the-pants setup, I basically threw the DX6i in the heli, got the blade pitch eyeball close, and went for it. I guess I got lucky, because it flew fairly well, or at least it seemed to. Anyways, when I got the pitch gauge out (which has been in the toolbox since I bought it, 2 weeks ago!) and watched a couple of videos to learn how to use it properly, I found my eyeball settings were WAY off, I had on the low stick, -7 degrees of pitch, and on the high end, I was off the scale, probably somewhere around 14-15 degrees!!
I have read that for normal flight, hovering and basics like that, I should be around -2 for the low stick, and about 11 degrees on the high end of the stick. Well, I got them there, but I'm not sure if I got them there the RIGHT way...let me explain, if I can... I tried travel adjust, for the pitch, thinknig it would reduce the overall travel, since I was too low on the low, and too high on the high... I'm not sure exactly what this adjustment is supposed to do, but on my setup it didn't do anything. I still had the same pitch readings, whether the travel was at 0% or 125%?? Anyways, I decided to begin with the low end. I used swash mix to get the low end pitch to -2 degrees, that was no issue at all, reduced the swash from like -60 to -46 to achieve that.
Now, I was at -2 on the low side, so the only way I could figure to get the high end from off the scale, to 11 was to limit the travel using pitch curve? I tried to adjust the high end with the swash trim, but it also affected the low setting I had already made... I ended up with it at 11 degrees on the high stick, but my pitch curve is way, way low, with the high end (5) being at 50%... and 4, 3, 2, and low progressively lower down the scale to achieve the desired 11 degrees of pitch at full throw of the throttle stick.
Am I OK with this setup, or did I go about achieving the desired end result the wrong way?
The next question is, if you have been following the forum, I have decided that I want to try to get my rotor headspeed as low as possible, while still having enough power to maintain flight as discussed on another thread regarding rotor speed vs. stability... can I do this mostly with throttle curve on the radio itself, without having to change motor/pinion gearing, etc? Also, I am guessing that it's tricky to get the throttle and pitch curves set up to work well together...that it will just take some extensive experimentation to get the combo that suits me and my flying skills/tecniques? I played with the throttle curve a little earlier today, without blades, and spun it up, and then changed throttle curves to see what does what...and I ended up lowering my whole curve to max out at about 75% to start....any ideas on this?
I also switched back to flat bottom blades, hoping for some additional stability, I have read both ways on blades, some say flat bottom are better for a stable hover, some say the symmetrical are?
I thought I had the gyro all dialed in the other day (new G110), but yesterday the tail was all over the place, and not just from the torque reaction that I was experiencing, the tail would sometimes just do it's own thing, not really suddenly, but it was definately not "locked" in, at all, I had to constantly make tail adjustments, even if the gain was at 100%...I am kinda at a loss on that one... I did notice that the receiver wires (my DX6i came with the AR6200 receiver, which has a little remote receiver with it, 2 in all) were RIGHT up against the main motor case, so I moved them away, thinking I might be getting some RF noise in the radio...other than that, I am really scratching my head on this gyro, I thought it was supposed to make it EASIER to fly the heli, but yesterday, I was doing nothing more than flying the tail !!
I know that's a lot to ask at once, but I don't want to clog up the forum with a bunch of different/overlapping questions...
Thanks so much in advance, as always, you guys are a great group, hell, I spend more time here than practicing on the sim...maybe that's my problem !!!?? LOL
Glenn
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B400/B400/MCX/MCX/Hirobo Quark SRB/Hirobo XRB/CX2/CP Pro/Gaui 200 SE/Align T-Rex 500 ESP....and BROKE!
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CPP setup advice/DX6i (long) - 
