Hi David and welcome to the forum. With this type of model it would be normal for the entire superstructure to lift off as a single piece. The screwed down hatches will probably give to access to steering linkages and would not need to be removed unless you encounter any challenges with the rudders.

First job will be to see if the superstructure simply lifts up. If it does then take some pictures of the insides and we can see what we've got to work with. I would not do a float test until you can see the insides so the first job is to access the hull.

How do you know it is a radio controlled model and not a static version? Assuming someone told you surely they know how to access the internals otherwise how would they know it is radio control?

Value is very much dependent on the quality of the build and most RC modellers you will come across will want to see the insides before agreeing to buy.

It would be a great help if you could post some pictures of the internals. As Colin has said you first have to create an album, upload your pictures to the album then you can insert them from the album into a post.

Seeing what you have will be a great help in trying to determine what you need. There is basically no such thing as a 'control box' so not surprising you cannot see one. You basically need a radio transmitter that is paired with the receiver in the model. Into the receiver is plugged your servos for rudders and accessories, speed controllers for the motors and a power supply to the receiver if it is not getting it from one of the speed controllers. If you have a speaker you may have a sound system and you may have bow or stern thrusters to complicate the issue.

Try to get some pictures sorted out.

David,

You may find it useful to have a look at this article on model boat electrics by the late Dave Milbourn. It was written a while back but most of the information is still valid and will give you a good overview of the subject and what to look for in the model.

**LINK**

Colin