Hi Roy

I can confirm that the one I recommend you get 100% full throttle though I ditched the differential only setup after a painfully twitchy 10min of run, stop, adjust of the manual rudder and added in a working rudder alongside the mixer which made handling a breeze

Regards
Scott

Hi Happy H Do you know if the power to each motor is 100%? Many years ago I built a mixer electronics kit and the power was shared 50:50 never getting full speed on both motors.
Roy

PS1

Do you have speed controllers? (Esc's)

PS1,
Take a look at this unit.
https://www.componentshop.co.uk/p94l-dual-esc-and-mixer-2-x-10-amp.html.html
Not knowing your motor size, they make one for bigger motors too.
Unfortunately it appears to be out of stock at the moment.
However, you can download the directions and see if it fits your bill.
cheers.

This is what you need. It's a mixer for rudderless boats. One lead plugs into channel 1 and the other channel 2. The other two leads connect to the 2 esc's and then that's it as it mixes everything accordingly for you. Just make sure you have a right hand and a left hand propeller or the boat will try drag itself one way or another without a rudder to counteract that. That's why you'll always find a small manually adjustable rudder on the differential boats

Kindest regards
Scott

https://www.mr-rcworld.co.uk/shop/twin-screw-mixer/

Thanks you all for your help, I think I get the picture
The tx I intend to use will be a very simple basic one no bells and whistles.
The boat will not have a rudder, steering via motors only.
I would woukd like a setup of two stick tx left stick for forward and reverse / speed.
With right stick controlling steering via motors.
In this case what is the simplest/ best configuration.
Many thanks
👍

I should have mentioned that you can find Andy in the Boats section, both on "Dock Talk" and "Scale Boats".

PS1,
There is a gentleman who hangs out on RC Groups, (www.rcgroups.com). His name is Andy Kunz and he is a factory representative for Spectrum. I would suggest that you attempt to contact him and, having your radio model available, explain what you would like to do and ask him for his input.
It is entirely possible that your radio will allow you to set up mixing to run the motors without having to purchase additional electronics.
Apologies to the moderator is I am violating protocol here.

PS1

I don't know how to set that up via Spektrum however I know that you can set it up within a few seconds on a transmitter I use. You need two esc's which plug into channel 1 & 2. The transmitter does the mixing for you. It's a Surpass Hobby 6 channel wheel & trigger transmitter and receiver which are available from Amazon at £37. Receiver range is approx 350m and it's proven very reliable so far

From what I've read it's very difficult to control two motors with separate sticks apart from at very slow speeds.

Better to use one of the mixing boards mentioned - Action Electronics do them and Component Shop supply them though they are showing as out of stock at the moment.

PSI,
OK. Tank steering is what you would like. I don't have the manufacturer on the tip of my tongue, maybe someone else will chime in here, but there are units available that mix the two throttle channels.
Otherwise, if you were to set it up the "old" way, you will need two ESC's, (electronic speed control) one for each motor. Each ESC will be plugged into the receiver in the channels appropriate for, 1) throttle, and 2 Elevator. This will give you a throttle output on each stick( in the vertical direction) This is assuming that you have a two stick radio, yes?
Wire the ESc's according to the manufacturer's directions and Viola' you should be all set.

👍

OK thanks for all the responses.
I should have said more about the operational use of the RC.
I would like to run the two motors independently to steer the boat ie no rudder, doth motors on straight running and left or right motor for turns.
I will probable us a spectrum 6 tx and rx.
Thank you
Oh and details of available manufactures equipment would be helpfull please.

As Scott eluded, you have several options open to you. You need to decide what you want your model to do. For instance, do you want independent control over your motors? That would give you greatly enhance control and maneuverability. This would require two electronic speed controls(ESC's). If this is not important than you could run both motors off the same control. They would respond the same, ie, direction(forward/reverse) and speed. This would require only one ESC, but it would have to be able to carry the current of both motors. A third option would be to use a mixer. Your radio may be able to do this for you, but if not, a specific mixer is available that will mix your rudder and your motors. As you input rudder control, one motor, usually the inboard one, slows down, helping with the turn. It will also allow you to "spin" the model in place.
As you can see, there are a number of ways that you can go. If you are near a club, I would suggest spending some time chatting up the members. They should be able to help you decide which way to go.
Then, hooking up the radio will depend upon which model radio you have. As Scott asked, it will help us to help you.
Cheers

Hi and welcome

What Spektrum transmitter and receiver do you have? Also do you have one or two esc's?

Kindest Regards
Scott