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Newbies: Tips and Information Section of HF, specifically for Passing along info to newcomers to the hobby. Setup, tweaking, orientation practice, etc. |
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01-16-2017, 08:39 PM | #1 (permalink) |
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Join Date: Jun 2012
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Tail Blade setup Q
Trying to mechanically setup my tail.
When centering the tail slider, why do the blades sometimes end up coplanar, and on other helis the blades are not? If the tail blades aren't lined up, would'nt the tail spin out when in a hover and in rate mode? (no gyro gain) |
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01-18-2017, 05:14 AM | #2 (permalink) |
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Join Date: May 2015
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Some helis are designed with a little tail blade pitch (typically a couple of degrees) at the centre travel point to provide the tail thrust required to prevent the tail from spinning due to the torque on the mainshaft. Some are designed to have zero tail pitch at centre travel as modern FBL systems compensate automatically in heading lock mode anyway.
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Goblin 380 KSE, OXY 3, 180 CFX, 130 X, nQX, mCX2 DX8, BeastX, Heli-X, neXt |
01-18-2017, 10:04 AM | #3 (permalink) |
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Thread Starter
Join Date: Jun 2012
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Ah! Ok. That makes sense.
So if it depends on the model, I should mechanically center for zero pitch and then check it out in a hover with the gyro gain set to zero? This is for a Curtis Youngblood Rave 700 ENV |
01-18-2017, 10:32 AM | #4 (permalink) |
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Join Date: May 2015
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You generally set up the servo centre with equal pitch slider travel in each direction, which may or may not be zero tail blade pitch depending on the heli design. For example my OXY 3 actually has 2.5 deg tail pitch with the pitch slider at the centre of its travel. You don't set gyro gain to zero either. Typically you set it to a fairly low setting, maybe 30%, and tune up from there. If you set zero gain on the gyro you will have little or no tail control.
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Goblin 380 KSE, OXY 3, 180 CFX, 130 X, nQX, mCX2 DX8, BeastX, Heli-X, neXt |
01-18-2017, 11:36 AM | #5 (permalink) |
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Join Date: Jun 2012
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Ok that makes sense. thanks for the help
When I said set gyro to zero, I meant in a hover, not flying around. That way I can see if my tail is centered correctly rate mode setting has gyro from -30% to 0% If you had the gyro setting too high, you would never know if your tail was sound and centered because the gain would be compensating for the flaw. |
01-18-2017, 11:45 AM | #6 (permalink) | |
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Join Date: May 2015
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Quote:
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Goblin 380 KSE, OXY 3, 180 CFX, 130 X, nQX, mCX2 DX8, BeastX, Heli-X, neXt |
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01-18-2017, 11:45 AM | #7 (permalink) |
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Join Date: Apr 2011
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I haven't seen anyone do a rate mode setup in a very long time.
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Heli's I have: Goblin 500 (Vbar Neo), Gaui X5(Vbar Neo), X7(Vbar Neo), Innova 600 Night heli (Vbar Neo Vbar Vcontrol I'm the not so newbheliusr as I have been here a while. But I like this name. |
01-18-2017, 12:42 PM | #8 (permalink) |
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Thread Starter
Join Date: Jun 2012
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The only purpose of rate mode for myself, would be to check to see if my tail is in good shape. Not sure what others use it for. It gives me peace of mind that's all. I never use it for flight. Just for setup and check while in a hover.
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01-18-2017, 01:59 PM | #9 (permalink) |
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Join Date: Apr 2011
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I realize the purpose. I have been flying for a while and have done a rate mode setup. If it gives you piece of mind, then by all means do it.
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Heli's I have: Goblin 500 (Vbar Neo), Gaui X5(Vbar Neo), X7(Vbar Neo), Innova 600 Night heli (Vbar Neo Vbar Vcontrol I'm the not so newbheliusr as I have been here a while. But I like this name. |
01-18-2017, 02:37 PM | #10 (permalink) |
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Join Date: Jan 2016
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An interesting thread: To Rate Mode or Not
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Compass Atom 5.5; Oxy 2/3/4 XK K110 K120 |
01-18-2017, 03:03 PM | #11 (permalink) |
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Thread Starter
Join Date: Jun 2012
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Wow. true debate in that thread.
I find it makes sense. Once its locked in, I will probably get rid of it as well as lock in my gyro gain setting to my flight mode switch. I keep mode and gyro gain separate until I know for sure I am happy with the two different gyro gain values. |
01-19-2017, 05:19 AM | #12 (permalink) |
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Join Date: May 2015
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I'm still not convinced you should be using a zero gyro setting for adjusting drift in a rate mode setup. It sounds like a recipe for an uncontrolled spin to me! Personally I've never bothered with rate mode setups and never had a tail problem. I just set up the bell crank at 90 deg (with designed counter-pitch or not), set the end points and let HH mode go about its business with appropriate gain tuning.
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Goblin 380 KSE, OXY 3, 180 CFX, 130 X, nQX, mCX2 DX8, BeastX, Heli-X, neXt |
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