Why the 7th Channel? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 05-16-2017, 10:00 PM   #1
Droptanks
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Why the 7th Channel?


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Looking at Trex 500L req 7ch and 500X only req 6ch. What is the 7th channel for?
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Old 05-17-2017, 01:23 AM   #2
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Re: Why the 7th Channel?

Have you checked the manuals ?
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Old 05-17-2017, 07:33 AM   #3
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Can't really tell from the manuals. I'm new to heli. Why the 7th channel at all on this type of electric heli?
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Old 05-17-2017, 09:58 AM   #4
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Re: Why the 7th Channel?

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Originally Posted by Droptanks View Post
Can't really tell from the manuals. I'm new to heli. Why the 7th channel at all on this type of electric heli?
Found it in the manual. There are more controls needed on the 500L system as that has a flybarless head were the Trexx 500 has the flybar. If this is your first heli and new at it , I would recommend a fly bar type head type heli as it is less complex to set up. The flybarless head is for advanced heli pilots or if you have an local experienced heli pilot to do the setup and initial flight testing and trimming.
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Old 05-19-2017, 10:47 AM   #5
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Re: Why the 7th Channel?

Hi Dan, welcome to the forum. The reason helicopters have the option for the seventh channel is for use of a governor to have a consistant head speed. You have an idle up switch on the transmitter where you set you throttle curves "head speed" the seventh channel is where you use the governor pickup to control the head speed. You do not need this option as you can use throttle curves to control the head speed.
As far as a fly bar goes.... they don't make them any more. Flybarless is quite easy to setup , there are several brands some are simple and others are more complex.
If you need some help please ask.
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Old 05-19-2017, 11:23 AM   #6
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Re: Why the 7th Channel?

http://www.rchelicopterfun.com/flybarless.html
A little more input into flybarless vs flybar. Once setup by an experienced heli flyer
will help its all in the extra electronics needed for flybarless heads.
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Old 05-19-2017, 11:29 AM   #7
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Re: Why the 7th Channel?

Governor
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Old 05-19-2017, 03:14 PM   #8
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Re: Why the 7th Channel?

Thanks for the replies guys! I've seen Governor feature in some ESC's, would going through the radio system be advantageous? Do people switch to different head speeds in flight? I'm no 3D pilot and don't ever intend to be. Will I be able to get by on larger Helis with just a DX6?

Thanks again!
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Old 05-21-2017, 02:04 PM   #9
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Re: Why the 7th Channel?

Hey Dan, yes you can use six channels for any full collective helicopters. Setting throttle curves as I said works , head speed can change with more or less pitch being inputted, therefore the governor keeps the headspeed as stable and consistant as possible. If you are a sport flyer there is no need for a governor on electric heli's. Nitro's can overspeed and snap a connecting rod etc... therefore the governor shuts the throttle to keep it consistant.
So if you don't care about a slight drop or increase, which is common you just set your throttle curves to the desired target speed.
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Old 05-21-2017, 02:21 PM   #10
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Re: Why the 7th Channel?

I have a trex 500E , throttle curves, normal mode 0-40-65-65-65, Idle one 81-80-80-80-81. Idle two 85-84-83-84-85. You see as you increase collective you add a slight amount of power to help so the head doesn't bog down. Also as you are learning, make sure your throttle hold is set to zero, once you are just above the ground hit the throttle hold and set it down. This will start your learning of an autorotation landing. Also doing this if you tip over the motor has no power "hence" the dreaded chicken dance, where the heli beats itself to death while you frantically try tofind that switch to shut it off. I started 10-12 inches from the ground at auto's , with my 700E I can auto from 400 feet up and cover a half kilometer on final, or dive then pull it into a loop and land etc. All in the learning curve.
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