Matt476
I have a bit of a problem with a twin-engine plane I built this summer. It is a flite test Sea Duck and it flys great except for one thing, I didn't properly hook up differential thrust. It wasn't until after the maiden and I went back to add rudder that I realized my mistake. I used a Y harness to connect the two esc's to the receiver and with the connection buried deep inside the plane I can't get it out without serious excavation. Is there any way I can add differential? If I can't find a suitable fix i will cut out the back pannel and try to solve the problem but there still might not be a solution if the Y harness is buried somewhere inside the wing. Hopefully, someone can give me a hand the plane flys really great except for this problem.

Thanks to everyone who takes the time to read this.! (:

Matt476
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notamedclosed
No sorry, the only way to have differential thrust is for the ESC’s to have separate wires from either an onboard mixer or the receiver itself. If they are sharing the signal from a Y cable they will only work together. You need to replace the Y Cable. Luckily foam is somewhat easy to cut in strategic locations....make the change..and then glue/tape back together.

Also I assume you can reach the Y split? Can you cut those wires and rewire that back to the receiver?
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Matt476
I can reach the Y cable.
Thanks for letting me know.
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bogusbandit56
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I can reach the Y cable.
Thanks for letting me know.

This video will help.
Wot, no Depron?
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bogusbandit56
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This video will help.

But you can do it just as easy with a Vtail mixer as per this video.
I haven`t tried this way so I`m not to sure how well it works.
Wot, no Depron?
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whatmovesyou
The first video shows how to program where the result is one motor goes on or the other. So the net result is there is a jerking action on one side or the other.
The second video is totally different so when rudder is applied, one motor increases say 100rpm's and the other side decreases 100 rpms. That way, the action of equal forces on each side (fore and aft) gives a smoother turn.
The second reason it's better is there is no programming to do. All you do is plug the elevator into throttle(like both side of a plane, they go equally up or down, so both throttle go up or down. The aileron is plugged into rudder(just like a plane, one side goes up (add's rpm to that motor) and the other aileron goes down(so that motor decreases the same as the other side increases) and produces an even force around the CG, so it doesn't jerk.
So for about 12-$15 dollars, just plug it in and your set to go.

Works real good with EDF's, where if you do the first of only 1 motor adding or subtracting, it makes terrible turns with rudder.
I like to design and fly unique planes.
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bogusbandit56
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The first video shows how to program where the result is one motor goes on or the other. So the net result is there is a jerking action on one side or the other.
The second video is totally different so when rudder is applied, one motor increases say 100rpm's and the other side decreases 100 rpms. That way, the action of equal forces on each side (fore and aft) gives a smoother turn.
The second reason it's better is there is no programming to do. All you do is plug the elevator into throttle(like both side of a plane, they go equally up or down, so both throttle go up or down. The aileron is plugged into rudder(just like a plane, one side goes up (add's rpm to that motor) and the other aileron goes down(so that motor decreases the same as the other side increases) and produces an even force around the CG, so it doesn't jerk.
So for about 12-$15 dollars, just plug it in and your set to go.

Works real good with EDF's, where if you do the first of only 1 motor adding or subtracting, it makes terrible turns with rudder.

I don`t know the exchange rate but the hobby king Vtail mixer is £2.74 in the UK which is very cheap.
I have mixed diff thrust in my Turnigy 9xr to the rudder and it gives a very smooth transition of power depending on what percentage of mix you have. One motor drops and the other increases, I suppose it is how the softwear is written in the TX.
Wot, no Depron?
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DualDesertEagle
Unless ur electronics are within easy reach of the battery hatch or hanging in thin air anyway (like they would on profile planes) u should always have a hatch to get to them either for replacements or for andjustments. I've learned that lesson briefly when I wanted to take the receiver of my radio set with embedded V-tail and delta mixers out of my 3-channel Magnum Reloaded and use it in my RCP F-18. The whole plane was glued together and thus left me no choice but to cut it open, risking grazed wire insulation and a damaged model in the process. Fortunately I could get it out and put the plane back together without leaving major scars.
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Matt476
Thanks for all the feedback guys!!
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