Chris Walby Posted August 8, 2022 Share Posted August 8, 2022 Hi, I can think of a number of ways of doing this, but am sure there will be a far more elegant options out there by grater minds than mine! Ok so what I have is my GTC (electric) with separate channels for each motor (THRO mixed to GEAR channel) and ailerons on split channels, the rest is standard. What I want to do is practice dead motor on either side via a 3 position switch. Mid switch position throttle stick to both motors and switch up/down cuts one or other motor so I can select in flight. In the unlikely event things get ugly I can flick the switch to the mid position and both are working ok. The questions are, can I do it with the existing mix or do I need to do that another way and then what's the best approach? Easiest way of explaining what I need is a throttle cut on one or other motor via a 3 position switch. Thanks and lastly I have a DX8 gen 2 if that helps. PS could we keep answers specific to questions, cheers Quote Link to comment Share on other sites More sharing options...
Nigel R Posted August 9, 2022 Share Posted August 9, 2022 Would have though two separate mixes would be the easy way? Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted August 9, 2022 Share Posted August 9, 2022 Agree with Nigel, just because the way my brain works, would set up 2x 2 way switches. Switches on outer right and outer left So that I reach the minimum distance to cut either left or right motor. Quote Link to comment Share on other sites More sharing options...
Chris Walby Posted August 9, 2022 Author Share Posted August 9, 2022 Thanks for the information, I'll try a few things out. I was just wondering if I could do something with switches menu option as in switch either the throttle stick to throttle channel off rather than a mix? Quote Link to comment Share on other sites More sharing options...
Nigel R Posted August 9, 2022 Share Posted August 9, 2022 Could you use the throttle stick with two mixes, 100%, into say both gear and aux. Then use gear and aux on the receiver to connect the ESCS. Use the switch or switches to enable each mix. Quote Link to comment Share on other sites More sharing options...
Chris Walby Posted August 11, 2022 Author Share Posted August 11, 2022 Thanks guys and I like Nigel's suggestion, but will need to Y lead the ailerons (only did that as I thought I might play with drooping ailerons for landing). Once I sort it I'll report back. Quote Link to comment Share on other sites More sharing options...
Nigel R Posted August 11, 2022 Share Posted August 11, 2022 Let us know how it goes. I'm interested in trying to do something similar for my twins (I have the exact same TX). Quote Link to comment Share on other sites More sharing options...
MattyB Posted August 11, 2022 Share Posted August 11, 2022 18 minutes ago, Chris Walby said: Thanks guys and I like Nigel's suggestion, but will need to Y lead the ailerons (only did that as I thought I might play with drooping ailerons for landing). Once I sort it I'll report back. Sorry, but I think you are a little confused on this one... If you want to configure flaperons, you must have both servos on separate channels and utilise mixes; you can't use a y-lead. This is universal truth, irrelevant of the radio brand used. Quote Link to comment Share on other sites More sharing options...
Chris Walby Posted August 11, 2022 Author Share Posted August 11, 2022 (edited) 14 minutes ago, MattyB said: Sorry, but I think you are a little confused on this one... If you want to configure flaperons, you must have both servos on separate channels and utilise mixes; you can't use a y-lead. This is universal truth, irrelevant of the radio brand used. MattyB...What I meant to say is that the ailerons are currently on separate channels ready for that bit of playing, but because as Nigel suggests for the independent throttle cuts to work on a 3 position switch I'll need to assign one throttle servo to the AUX channel (which is currently used for an aileron servo). and the other is already assigned to the gear channel. I might be able to reassign the Throttle channel, gut come to that bridge if I need to. Simples 😉, but I feel a sketch coming on... Edited August 11, 2022 by Chris Walby 1 Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted August 11, 2022 Share Posted August 11, 2022 Chris I did use a switch 'throttle cut' on my Cessna Skymaster using a Spektrum DX6i. With its tandem inline motors I was happy to cut the power to one, actually the front, although if at full throttle the switching the power back on again was pretty violent on the motor mountings and the resulting instant amps was not that kind to its ESC. 😉 Quote Link to comment Share on other sites More sharing options...
Sheepish Posted August 11, 2022 Share Posted August 11, 2022 I did something similar to this many years ago using a JR X347 when I wanted to have two separate pairs of engine throttles on a Chris Golds Lancaster I built. I found the easiest way at the time with the X347 was to use a helicopter setup and have the inner pair of engines on the throttle function and the outer pair as the pitch function. The standard heli set up then used two servos, one for pitch and one for throttle. I then had available throttle and pitch hold switches and curves for everything. It worked really well at the time and you could do the same here by using a left and right split. Quote Link to comment Share on other sites More sharing options...
MattyB Posted August 11, 2022 Share Posted August 11, 2022 6 hours ago, Chris Walby said: MattyB...What I meant to say is that the ailerons are currently on separate channels ready for that bit of playing, but because as Nigel suggests for the independent throttle cuts to work on a 3 position switch I'll need to assign one throttle servo to the AUX channel (which is currently used for an aileron servo). and the other is already assigned to the gear channel. I might be able to reassign the Throttle channel, gut come to that bridge if I need to. Simples 😉, but I feel a sketch coming on... OK, gotcha. It is threads like these that make me glad I don't use one of the proprietary OS radios - doing what you want to do here would be so much easier on OpenTX, EdgeTX or erSkyTX (or the proprietary Jeti or ETHOS for that matter, but then they have both taken considerable inspiration from the Open source firmwares). 1 Quote Link to comment Share on other sites More sharing options...
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