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aileron servos,y lead or dual channel?

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SONNY MONKS14/11/2018 17:15:43
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269 forum posts

If you have enough channels,would you choose two seperate channels,or one,with a y lead?

PatMc14/11/2018 17:17:55
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4200 forum posts
521 photos

Seperate.

Frank Skilbeck14/11/2018 17:20:44
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4453 forum posts
101 photos

Separate, that way you can easily adjust the amount of aileron differential at the Tx.

Don Fry14/11/2018 17:22:55
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3949 forum posts
42 photos

Ditto, it allows fine tuning via the transmitter, makes differential easier, allows flaperons. No downside, except, two plugs to attach, instead of one.

SONNY MONKS14/11/2018 17:24:30
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269 forum posts

Thanks frank,ive changed it to seperate on my frsky X6R,i was quite surprised when i plugged the second servo into channel 5,and it was already operational,i thought you had to mix it,from channel 1 of course,certainly made my job easier,i thought it would be a right job,with it been frsky,as im still getting to grips with it.

SONNY MONKS14/11/2018 17:25:46
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269 forum posts

Thankyou all for the advice gents.

Nigel R14/11/2018 17:26:13
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3066 forum posts
475 photos

Separate, because you can do subtrim and differential with ease.

Although differential also easily possible by using a slightly offset horn.

If I only had a Y lead I wouldn't worry too much, though.

cymaz14/11/2018 18:19:06
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8670 forum posts
1177 photos

Separate aileron servos and channels. And if you can separate servos and channels on the elevators.

Dave Hess15/11/2018 11:08:25
303 forum posts
18 photos

I had an interesting situation the other day. The BEC on the cheap ESC wouldn't work with two servos on one channel, noteven 3.7g ones, but it was fine running two 9gservos at the same time on separate channels. Naturally, I changed itfor one that could manage it.

Frank Skilbeck15/11/2018 16:10:52
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4453 forum posts
101 photos
Posted by Dave Hess on 15/11/2018 11:08:25:

I had an interesting situation the other day. The BEC on the cheap ESC wouldn't work with two servos on one channel, noteven 3.7g ones, but it was fine running two 9gservos at the same time on separate channels. Naturally, I changed itfor one that could manage it.

When you say the BEC wouldn't work do you mean the servos wouldn't operate. One "feature" of modern 2.4 systems is that the position voltage/current is quite low and if the servo requires a strong position signal and they don't like sharing it on a Y Lead. Note this is not the power to run the servo motor but the signal which tells the servo where to go, this signal comes out of the decoder chip in the receiver and is very low power so wouldn't cause any issues with the power feed to the Rx. Although we did have an issue one time with a servo that worked fine on a Rx battery but overloaded the ESC BEC, in this instance it was a faulty servo that was overloading the BEC.

Gary Manuel15/11/2018 16:14:55
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1894 forum posts
1508 photos

This really is a "no-brainer" Sonny.

If you have the channels - use them.

Edited By Gary Manuel on 15/11/2018 16:15:05

Dave Hess15/11/2018 16:44:29
303 forum posts
18 photos
Posted by Frank Skilbeck on 15/11/2018 16:10:52:

When you say the BEC wouldn't work do you mean the servos wouldn't operate. One "feature" of modern 2.4 systems is that the position voltage/current is quite low and if the servo requires a strong position signal and they don't like sharing it on a Y Lead. Note this is not the power to run the servo motor but the signal which tells the servo where to go, this signal comes out of the decoder chip in the receiver and is very low power so wouldn't cause any issues with the power feed to the Rx. Although we did have an issue one time with a servo that worked fine on a Rx battery but overloaded the ESC BEC, in this instance it was a faulty servo that was overloading the BEC.

Interesting. What happened was that everything was OK when i switched on, then I started wiggling the sticks to test all the servos. Everything was OK for about 6 seconds, then the ailerons went nuts and ended up stuck with the arms gone past 90 deg movement. Once that started, the elevator and rudder were no longer controllable. I tried two pairs of servos, which both behaved the same, so i swapped the ESC for a better one and everything was OK. I had a similar experience before, when I knackered a good quality ESC by connecting it the wrong way for a short time. Fearing I had done it again, at first ,I tried a second ESC that was the same type as the first, but the servos behaved the same.

What do you think? it's one of those £4.50 Orange DSMX receivers.

Nigel R15/11/2018 16:57:42
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3066 forum posts
475 photos

"it's one of those £4.50 Orange DSMX receivers."

Which Orange DSMX receiver is £4.50?

Martin Harris15/11/2018 17:41:39
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8805 forum posts
216 photos

Dave's one?

ChrisB15/11/2018 20:26:36
1220 forum posts
34 photos

Either or.

Y leads can attract RF interference on occasions but it's always pot luck.

Stephen Smith 1415/11/2018 20:46:09
150 forum posts
Posted by Nigel R on 15/11/2018 16:57:42:

"it's one of those £4.50 Orange DSMX receivers."

Which Orange DSMX receiver is £4.50?

The £4.50 ones

Nigel R19/11/2018 10:17:07
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3066 forum posts
475 photos

I gotta watch you guys!

For the record, I found on Hobbyking:

The cheapest Orange [410] with DSMX and actual servo plugs is £9, 6 channel version is nearly £10.

A CPPM plug version is £5.50, but that's intended for quads I think.

The older DSM2 only 6 channel receiver is £4.70, maybe Dave means that one. But that isn't DSMX.

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