Yes, multiple receivers will work off the same transmitter, but...
The transmitter needs to have more channels than the individual receiver.
For example, a transmitter can control 12 channels, but the receiver is an eight channel receiver. The first receiver will receive channels 1-8, while the second will receiver 9-12.
With older analog systems, it is possible to run multiple receivers off the same transmitter. As long as the channels used by each receiver, are not used on the second receiver. : receiver 1 uses 1-4, receiver 2 uses 4-8. And so on.
Note that each radio system is different, so research what your system can and can not due. new radios(computer types) are extremely sophisticated now.

Most certainly on the FRSky tx ‘s in fact you can have 3 rx per model

Hi Denis. In answer to the question "can 2 receivers work off one transmitter" The answer is yes. There is a big but. Because it all depends on what transmitter and receiver you have. I have only come across it using Radio Master and Express ELRS as shown in the video clip. I think you can do it with OPEN TX and EDGE TX but is receiver dependant.

Then I use a y lead to my reciever my next query is can 2 receivers work off one transmitter?

I have heard of it being done but that was with more expensive and sophisticated ESCs. Generally speaking the advice is to use an ESC for each motor. The reason being that brushless motors work on very accurate timing/pulses in their interaction with the ESC, hence three cables, and running two motors would interfere with this.

Can you use one esc to operate two brushless motors?

Ssorry it should read How's models, also excellent service. '👍

Taken your advice and bought two 80amp escs from homes at a good price the motors came from there as well, as soon as they arrive they will be fitted in the Aero-naut Pilot. Will be posting pics ASAP. Thanks again.👍👍⚡

I will be following this type of subject very closely in the coming months because of this 4.8 pound piece of 3D printed madness.
More to follow on an appropriate blog as things develop.
😜😉

What type of boat are you using the motor in, as that is a very high kV and as suggested the ESC needs to have a high capacity.

Unless it's a very high speed boat or being used with a water-jet it might be better to use a lower kV motor with a lower capacity ESC?

Chris

For my part, SimpleSailor goes into detail.
The very detailed explanations are not boring for me, in fact I find them very informative.

Hi Denis. The attached might help. Not my handy work. You will see from the chart it does depend on the battery voltage/pack size. I have used a 3S running the same motor as you. It runs on a FlyColor 90 Amp and runs with just a bit of heat in it. I measured the max current at 60 Amps under load. As a rule of thumb, I always buy the highest capacity ESC I can afford, then I know I have plenty of leeway. I could go into lots of detail but it gets boring.😁