Yep, I saw this too - looks very useful!

The Fs i6 can also be easily flashed to increase to number of available channels from 6 to 10 and even 14 -- the four switches and two pots become independant of each other.
The software is on

Github.com

I have lost the link but a google search should find it, also search on Youtube!
Pm me for info!
Good luck if you try

openrcforums.com/forum/index.php?sid=b316c404489b5bb15db3a9097f26eeb2

Follow the link to an excellent forum, the developer, mike blandford is based in Dorset, lots of transmitters covered, mods etc -- a very helpful group, the one i have found most useful!
They will give links to other sites for tx flashing etc, just a little solder skill needed then trials!
Another site, - ER9X.com for mods to the flysky/turnigy/eurgle/taranis etc ranges.

Thanks for sharing this short resume. The Taranis is a really fantastic radio and as it is open source has always been able to be modified to meet many different formats for individual users. The possibilities are endless but do require a certain level of computer literacy.
dave976

I have just received this by mail from Hobbyking, it might be of use, follow the link

https://hobbyking.com/en_us/blog/cat/planes/post/setup-differential-thrust?utm_campaign=271666_Monthly%20Newsletters%2028%20Jan%202022&utm_medium=email&utm_source=dotmailer&dm_i=4SQP,5TMA,9UXYV,LOH5,1

Thanks so much Dave, sorry for not responding sooner, day job getting in the way!! Hope to try this at the weekend..👍👍

It's on this thread, posted 2 days ago,
dave976

Maybe I have missed it, but the programming of the TX starting from your recent posting!

Hi Stotty1111
Not surprising really as the gimbals on the Flysky are not that good. Then again the price has to have compromised the build and for most modellers the FSi6 works fine and offers many of the functions of the more expensive offerings at an affordable cost. The Radiomaster offers Hall effect gimbals and they remain spot on at all times but again at an increased cost. What exactly would you like to see, the equipment or a working demo?
Cheers
Dave

Spent some time last night trying various mixes, none of which worked as smoothly as that on my Turnigy 9X, the 6 seems a little rigid in the setup stage, whereas the 9X has more variables which does make it more flexible.
I will be interested to see the system suggested by Dave976!

Hi, I use motor control on my model ps Lulonga.I had a mixer problem with the HK6A somewhat simple transmitter. I solved it using an external V-tail mixer, and two ESC.I control the model using the right stick (throttle), the external V-tail mixer mixes me 3rd (throttle) + 1st channel (ailerons). another is on youtube >
http://www.paddleducks.co.uk/smf/index.php?topic=6336.45
Lulonga is a paddle steamer, but I think a similar principle can be used to drive propellers.
more videos you can view > google> lulonga model tomarack <
I add next modification of wiring

Tom

Hi Eric
Finally found some time to write up the procedure to program the FlySkyi6. Hopefully this will help you decide a way forward to control your twin props. The percentages I have used in the mix functions are more for guidance than hard and fast rules as different models and motors will benefit from some fine tuning.
FlySky Fsi6 – Using Mixing functions

Before commencing set your Tx to the settings I had on my TX
SYSTEM
Model – I suggest selecting a spare model and naming it Mixing until you are happy with the settings
Type – Airplane or Glider
RX setup – settings suitable for your equipment ie it will not affect the mixer
Trainer mode – off
Student mode – off
Sticks mode- Mode 2
SETUP
Reverse – all normal
End Points -all 100%
Display – Select this to see the individual channel out puts and the effect of Chanel 1 via the mixer on channel 3 and 5.
Aux channels Channel 5 – none
Subtrim – all centered
Dual Rate – Ch1 Normal Rate 100% exp 0
Throttle Curve – Normal L 0% 1 25% 2 50% 3 75% H 100%
Mix – this will link channel 3 and 5 and mix Channel 1 with channel 3 and 5
Mix#1 – On Master Ch3 Slave Ch5 Pos mix 100% Neg mix 100% Offset 0%
Mix#2 - On Master Ch1 Slave Ch3 Pos mix 50% Neg mix 50% Offset 0%
Mix#3 - On Master Ch1 Slave Ch5 Pos mix -50% Neg mix -50% Offset 0%
Elevon – Off
V Tail – Off
Switches Assign – not important
Throttle Hold – Off.
I am assuming owners of the i6 are familiar with the use of the buttons to operate the menu. I will mention for anyone new to the set that you need to save the settings on each screen by pressing and holding the Cancel button until the display changes. Yes the Cancel button. Took me a while to understand this logic when I first got the TX.
Have fun and boldly go
dave976

The radio I refer to is the FlySky FSi6 and I have used this on several models without problem. This set uses the built in mixer function which allows three mixing options. This is not the same as using Flapperons etc.
I was a fan of the FRsky Taranis but their latest offerings (Horus) appear to have abandoned the Open source route so I switched to Radiomaster. For most Model Boaters the FlySky offering ( in several guises) meets most of our requirements and is expandable for those who may need more control channels.
I will be posting details when I have time to document the procedure.
Happy days
dave 976

Dave 976 Having read your last post re twin motor control etc using an FS6 tx and trying to achieve similar programming as per the 9X tx, I don't think it can be achieved, see the attached sheet to explain how my system works and also the mixing of the 2 channels.
Interested to hear your views!
Tony S(Finistere)

Ah ha, That is different to my mix using a 9X tx with the ER9X software loaded, with the left stick vertical, both motors running forwards and back, and with independant rudder control on the right stick in a horizontal movement. If time permits tonight I will note the other motor activity as they are fully variable dependant on the stick position in the full 360' movement.
The tx is fully programable on all 8 channels with the 'flashed' ER9X software!

Hi Eric
I thought you wanted to use one stick to control the motors? The only way you can have individual control is to use two sticks.
I will explain briefly to help you understand.
The motors would be proportionally controlled via your left hand vertical stick giving forward and reverse. This would control output 3 on the rx and also output 5. This would use one of the 3 mix functions.
The right hand horizontal stick would control the "rudder" function giving left and right. It would also control via a mixer (2) channel 3 and via another mixer (3) channel 5.
So with the rudder at neutral both motors would be controlled by the left hand stick both forward and reverse.
Moving the rudder stick will cause the motor on the inside of the turn to slow and the other to increase. The actual amount can be configured to be as much or as little as your model requires. Full rudder can cause the inside motor to reverse if required. The mixing is reversed when the motors are running in reverse and again the control is fully configurable.
I have assumed Rx output 3 is the normal output for the left hand stick and channel 5 or 6 could be used.
I think this is possibly what you require as it will make your model very steerable using just two sticks whilst retaining proportional control.
If this is what you want I will give detailed instructions on how to Program the i6.
Cheers
Dave976

You should achieve that with a mix on the tx ie lhs gimbal for contol of motors and rhs for steering - up and down centrally forward / reverse of the 2 motors,then top rh corner one motor forward the other in reverse , the other way round in top lh position , centally/horizontally lhs inner motor stops, outer continues etc --- its easier to demonstrate than describe!

Thanks Dave, yes - they're very similar, just slightly different button setup but with the same tech inside I think! I'm using Mode 2 with throttle on the left and rudder on the right. Ideally I'd like individual proportional control of the motors without input from the rudder, but realise this may not be possible without the upgrade that BobbyN has suggested!
Look forward to hearing more 👍

Thanks Bobby, I'm now in touch with the seller so hoping to be able to get the upgrade sent over to the UK, I'll keep everyone posted on this as I'm guessing it may be of interest generally - I've certainly not seen anything like it over here! Please do keep me in touch with any other similar developments (i.e. Spektrum) too. Thanks again.. Eric👍

Hi Eric
The FlySky i6 is simple and easy to use and set up. I don't have the T6 version but it looks similar and probably has the same functions.
I believe you require both motors to work off one stick with the rudder off another but mixed with the motors so they reduce according to the rudder position. Which stick are you using for the throttle and which for the rudder?
Once you let me have this info I will set my i6 Tx up the same and then post the details.
Cheers
Dave

Eric no problems happy to have helped. Although I did learn that a twin throttle upgrade for a Skektrum I6 is on the cards (being developed). As opposed to the Flysky upgrade being sold now. As the seller is hard to find in the UK, given Eric's experience, I would be happy to keep an eye out and publish an update if anyone is interested. Just let me know so I can pass on details as I find out more. For this simple old sailor I still think the dual throttle upgrade provides the simplest most straightforward and uncomplicated way to achieve twin motor control. Albeit at a cost.

Thanks Dave, I’m using a few TXs but mainly a flysky FS-T6 and i6.
I’ve got a W-tail mixer from Mtroniks I was going to try, but would quite like some more independent control of each outboard. Any help with mixing on the radio gratefully received!
Regards, Eric

Hi EricMB
Action supply a dual ESC and mixer which would achieve your wish to control the motors with one stick and mix the rudder control to keep the model straight and help with the turns.
You have not said what Tx system you have. Modern 2.4Ghz sets now come with mixing functions which would do the same and you already have another ESC so that could be another option at little additional cost.
I have used mixing on several of my twin propped models using the tx mixing functions and they all work incredibly well.
If your system is one with which I am familiar I may be able to help you with setting up the tx to work with your model.
dave976

I use a Turnigy 8 channel unit, as below, running ER9X software i have motor functions on the LH stick, gives 360' movement for all combinations of motor control, rudders on RH stick horizontal movement.
The radio software allows for programming of sticks ie changing functions, also for individual motor speed control

An ESC with outputs for two motors will not allow individual conrol of the motors. it will run both motors at the same speed, ALL of the time. In order to acheive independent control of multiple motorsand to be able to runn them of f of one control requires an ESC for each motor, a channel to run it from, a channel and switch channel to turn on/off the mix funtion. Otherwise you will simply match the two mottor speeds manually or hook them together. In either case you limit your functionality. One key question here is what radio system are you using? Even some of the older analog sets, using the manufacture's or after market mixer, allowed individual control of the motors while also giving control of both motors on one stick. Almost all "modern" computer radios will provide mixing, some unlimited, that allows the user to select/create mix features to suite their needs. I am using taranis and Horus radios and teir programing allows me to mixmy motors, weaponssystems(not together), and anything else I care to. FlySky, Futaba, and pretty much the rest do so as well.
There used to be available, I have not looked for one in quite a while, aftermarket mixers that were plug and play for systems that lacked that feature. You may want to check into that.

You could control them with a mix on your tx assuming it is an adapted aero unit, but you do need 2 x esc's!
I have a Graupner Jules Verne(named H G Wells - because i am english) with 2 x drives and a 'v' tail mix, that allows up and down for forward reverse control, and sideways for forward on 1 x motor and reverse on the other etc
I do competitions here in brittany and the system gives superb control,
If you have a Turnigy/Flysky/Eurgle tx there is a software developer in the uk with a mix selection.
pm me for details if you want more info!
Tony S

Scratch that, he’s just replied! Thanks for your help..

Thanks Bobby, I found him on the Aus.com eBay- I’ve sent a message but no answer. Could you find out how much it would cost to send one to the UK do you think? He doesn’t offer international postage..

Eric I am in Australia the ebay seller is lucken_8114 if that helps to track it down. Have not been able to track down the email but will keep trying I have some other leads.

Thanks Bobby, nope, nothing coming up here. Are you in the UK? I’ve tried on eBay.co.uk as well as .com without success. If you do have the email that would be ace..
Thanks again! Eric

Eric

The link I posted works fine for me, Try searching ebay with dual channel gimbal. If you have any more issues I can try to get the email address for the seller.

What a great idea! Just like the throttles on the boat itself!! I can’t open the link on eBay, could you repost it here too pls?

Yes. I bought an esc with 2 sets of output wires on ebay. Only £12 from China. Using 9.6v nimh battery on an old graupner boat with 2 motors it works well. I connected it so motors run in opposite directions, left and right hand propellers.

Some time ago I posted a link for twin throttles. Perhaps a left field solution but it would allow you control each motor separately.

https://model-boats.com/forum/95058#95058

Here’s a video of one of them on test in the sink..

Thanks Mark, you mean you split the output into two? I was assuming I’d do the same. My motors are brushed too (although very high speed!)

On my twin motor boat I am using one esc with twin outputs, one for each motor but this only works with brushed motors.

Many thanks Dave, I already have a second ESC, I’ll just need to work out how to control two of them from one stick, whilst allowing independent speed control!! Maybe mixing on my TX?

I believe you will need two ESCs if you wish to match the two motors. I suppose you could buy a matched pair of units but I suspect the cost might be high. The W tail would also alter the direction which could be a 50/50 chance of achieving your goal. Worth a try though and cheaper than two Escs. You may be correct in thinking the closeness of the outboards will negate any speed/power differences.