using dual escs

[Robbie9859901]

I have a freewing PJ50 and want reversing. I have two avian 60 escs. I have "y" the throttle cable and "y" the battery cables. I have disconnected one positive wire on the throttle cable so that the receiver is only running on one bec. I get dual reversing sometimes and other times not. I don't care about the telemetry information. Someone out there must understand the electronics of this system enough to come up with a way to make the dual escs act as one reliably.

[RRHandy]

HH has made the avian reversing escs mated to there receivers for reverse to work with this setup.

[xviper]

Robbie and I have been in PM communication on this topic. I got around the problems of activating reverse thrust on my PJ by using dual receivers. One (AR637T) controls the plane and one ESC and the other (AR410) controls the other ESC. That's all the AR410 does and has only one lead going to it (throttle lead). Reverse is programmed separately via each RX, bound separately, then powered up together to make it all work. My situation was that NOT using dual RXs, it worked the first time (once) and then never again. After the first time, only one ESC went into reverse.
I believe this is what Robbie also experienced. I don't understand why it only worked once and can only "guess" that running 2 feedback signals (via the "ghost" channel 7) through the Y'd throttle leads somehow overloads or confuses one or both signal paths. I doubt this is a proper explanation and this is what Robbie is trying to ascertain. Why does it not continue to work after that ONE time? We're both curious as to the real explanation or possible a work-around solution so that only ONE RX need to be used.

PS. FYI for those who don't know .......................... Avian smart ESCs and Spektrum smart RXs have this neat feature whereby a signal on channels 7, 8 and 9 get fed back through the throttle signal lead and the ESC listens for it. A RX doesn't have to have those channels, only the TX needs to have them.
PPS. I've flown my PJ with perfectly functioning reverse thrust many times on dual RXs and it has never failed.

[Aaron]

How did you get the Rx to work in one plane.

[RRHandy]

How did you get the Rx to work in one plane.

You bind at the same time.

[Evan D]

I didn't understand his question so I didn't answer him but "You bind at the same time." to me seems like you are trying to bind multiple receivers. If two ESCs on one receiver there is no binding of ESCs but you should calibrate both of them together.

[xviper]

Since I believe Aaron posted this question as a result of my post from 3 years ago, I will respond with a clarification.
We were dealing specifically with dual engine, dual reversing ESCs at the time. Things have advanced quite a bit since but back then, it was difficult to get this to work. It was not as simple as using 1 RX and "Y'ing" together the throttle leads. The 2 reverse signals that went back thru the throttle lead got scrambled and both ESCs did not reverse all the time and together. Thus, it was necessary (then) to use a second RX (I chose a simple 4-ch smart Spektrum) to control only the throttle and reverse on the 2nd ESC. It is not necessary to bind both RXs at the same time. I have bound up to 3 RXs, one after the other (disconnecting the previously bound ones) and when all plugged in, all 3 worked. The TX remembered the first 2. Each ESC was calibrated individually (but can be done at the same time) with one being disconnected when not being calibrated.
Today, it is possible to use a single high channel RX to operate twin motors with reverse - just mix the 2nd ESC (throttle lead) to an empty channel and the reverse feed back signal will be sent back thru that channel, keeping both reverse signals separate. I did the above with my latest Hanger 9 20cc Twin Otter. I abandoned the 3 RX set-up in favour of a single 10-ch Spektrum smart RX.
Now, you can simple get reversing ESCs from (eg.) HobbyKing or Hobbywing. These use an actually physical reverse lead that can be Y'd together on twin set ups. (Spektrum doesn't use a physical reverse lead, but rather, a feed back signal thru the throttle lead.)
I still fly the PJ50 with the dual RX set-up - still works flawlessly. I had a similar set up on my AL-37 but have gone to a single RX for simplicity and it still flies today. Both have reverse.
NOTE: I am dealing ONLY with throttle and reverse when using multiple RXs. You CANNOT (and should not) use multiple RXs to send commands to servos, especially control surface servos.