Re: Best option for multiple servos

In article <12cfcs9o9lptk34@xxxxxxxxxxxxxxxxxx>, Ed Smega <smega@xxxxxx> wrote:

| I am assembling an ARF that has 2 separate elevator halves each with its own
| servo. The 2 choices I see are a Y cable and drive each servo off the same
| channel or, if the radio offers the option, of driving each servo off a
| separate channel.
|
| Is there an advantage of one option over the other?

Sure!

Pros of a Y-cable --

1) easier to program your radio
2) you don't need a computer radio at all
3) often easier to use a buddy box with (this is due to #1)
4) you might need to adjust the linkages of one of the servos or reverse
it in some other way so things go the right directions.
5) you can use a TX with only four channels. Similarly, you only need
a four channel RX as well.
To do seperate channels, you may very well need a six channel TX and
RX, as the second aileron servo is usually on channel six rather than
five, but some TXs let you put it on five, and some 5 channel RXs do
channels 1,2,3,4 and 6 for just this reason

Pros of seperate channels --

1) you won't need to change any servos or servo linkages.
2) you can program in flaperons or spoilerons if you wish.
3) you can use aileron differential if your radio supports it.
4) if one channel in your RX fails, you still have the other one, so you
might still have enough control to bring the plane down.
(Granted, I've never heard of this happening like that, and it's
very unlikely.)

--
Doug McLaren, dougmc@xxxxxxxxxxx Eject, Buckaroo! Eject!
.

Relevant Pages