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360CFX Blade 360 CFX Helicopters Information and Help |
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03-14-2017, 06:06 AM | #1 (permalink) |
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Join Date: Aug 2016
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Precomp (Tail Revo) mix - Parameter F in Beastx
Still trying to get the 360 Trio tuned. I think I like running this with a lower head speed - stunt mode 1. I get more battery time too.
I noticed that when I'm working on my lame tic tocs, the nose wants to go left (tail right). Since main blade rotates CW, this is the natural tendency of the tail, hence the need for the torque precomp / parameter F in Beastx. I have the precomp on the highest setting indicated by red solid light. I tried lowering it but this made things worse. Anyone else have this issue? Seems like I need more pre comp. I just bought a USB interface & it should be here this week. I'll try to increase it that way. Thanks! |
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03-14-2017, 08:05 AM | #2 (permalink) |
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Join Date: Jan 2017
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Hello Inverted Hookie,
If you speak to the BeastX experts, they give you more or less all similar responses like they do not recommend using torque precomp. This sounds odd as it appears to help you with your problem. However, I believe they are right because the tail should hold even without torque precomp. If your tail doesn't hold then the root cause is rather that it is lacking adequate performance. Thus, I believe reducing head speed might even worsen your problem because it also takes away tail performance as head speed is one of the tail performance drivers. Other key drivers are: (1) gyro gain (easy to try, often needs to be increased for lower head speeds) (2) longer/wider tail blades (easy to try) (3) tail servo with higher speed/torque (only impacts responsiveness, not maximum tail performance) (4) increasing tail gear ratio (needs modified pulley, haven't seen that before) (5) more tail blades (e.g. trio set-up, almost impossible to realize without aftermarket offer) ... In general, it appears to me like tail performance might be a bit of a common problem of the Trio with increased power on pitch (vs. the "Duo") but without sufficiently adequate measures to increase tail performance (see also here: https://www.helifreak.com/showpost.p...4&postcount=44). Hope it helps!
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Blade Nano CPS, 180 CFX, 270 CFX, Nano QX 3D, Spektrum DX6, DX9 |
03-14-2017, 10:55 AM | #3 (permalink) | |
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Thread Starter
Join Date: Aug 2016
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Quote:
I have read about increasing the size of the tail rotor blades to help. I did try to increase gryo gain, but started wagging, so I backed off. Good point too about the lower head speed making it worse due to slower tail rotor. I really hadn't noticed too much difference when using lower head speed wrt this phenomenon though. |
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03-14-2017, 02:22 PM | #4 (permalink) |
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Join Date: Sep 2015
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My tail never held well out of the box. I've been using smaller blades and higher head speeds, but there is always a niggle there. These helis have a very large blade area to weight ratio, and wonder if this is half the problem, maybe all of the problem.
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03-15-2017, 03:17 AM | #5 (permalink) |
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Join Date: Jan 2017
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For the Trio, I would try SwitchBlades 70mm (SW-70mm). They should be slightly longer than stock and a bit wider. Usually come perfectly balanced. Have not tried them but specs should fit:
Length: 70mm Width: 21-24.5mm Root: 2.6mm Bolt Hole: 3mm You show however check the bolt hole: might need bushing from 2->3mm. Also gyro gain may need adjustment (lowering). EDIT: There are a lot of some cheaper plastic 2mm bolt hole blades with 69mm length and 2.6mm root out there for the T-Rex 470L (e.g. part number HQ0693A). Maybe worth a low risk easy try...
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Blade Nano CPS, 180 CFX, 270 CFX, Nano QX 3D, Spektrum DX6, DX9 Last edited by Lupo99; 03-15-2017 at 03:37 AM.. |
03-24-2017, 08:37 PM | #6 (permalink) |
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Thread Starter
Join Date: Aug 2016
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It's working...
I got my USB cable and adjusted the precomp settings from 15/25 to 25/35.
It's doing the trick keep the nose more straight on tic-tocs. I'm running a low head speed too, so that may be why i'm having to increase the precomp so much. Still needs a little bit more, but happy to say it seems to be helping. Side note...if the StudioX software won't download your receiver parameters, then you may need to update the firmware - I had to. Important other side note...it's the weekend, now go tear up the skies!! |
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