The comment was passed that there was not a warship in the club. Muggin's here decided to have a go.
A Drawing was found by another member, I'll just call him TC. Having built this boat in the mid 1980's with a single screw, and a variable speed controller from a car, which gave FULL speed in reverse or the alternative was a Bob's Board, I hate them things, but they work, to a degree, if you match the motor Current to the model of board. This all drove a 540 motor, this was all in a balsa hull and upperworks/cabin. Its fate was a Viking funeral, not planned, the speed control must have overheated and it all caught fire, most sank, a few remnants surfaced but it was all scrap.. Anyway here we go again. Decided on a 6mm ply keel and Bulkheads and planked in 1/2" x 1/8" Balsa with a .8mm ply deck and upperworks, details probably in plasticard and wire.

Cutting out the keel and bulkheads , lightening wherever possible by removing the innards of the bulkheads.
Stringers tacked in or onto a dry fit trying to keep the whole square.

Glueing up the frame Keel Bulkheads and Transom.

Planking the Hull in 1/2" x 1/8" Balsa and tissue covering the hull. Start with 3-5 coats of dope and thinners 50/50 then apply the tissue with dope again thinned and finally about 3-5 coats of dope/thinners, lightly sanding between coats.

Marking out the cabin/upperworkks and fitting the .8mm ply deck, the cabin is 1.5mm ply.

Further pics of the hull build.

Motors and drive shafts. 3 drive motors fitted and independently controlled. Managed to get hold of an old Futaba Navy with marine sticks fitted, so the outboard motors were controlled from the twin stick's andd the centre screw was controlled off the rudder stick, hopefully giving a one stick operation on the rudder side, if required and the twin stick if wanted giving extra propulsion, although having a slender hull not a very big beam, 3 drive motors made it a bit tight, for me that is.. Also the rudders are not fitted as scale, i wanted more control of the steering. so they were moved forward towards the screws. Several motor types were tested for fit, but i settled on some 386, with the opertunity of slightly larger and more powerful motors.

Motor Mounts and Rudders, have always used 2 UJ couplings to a shaft from motor, and the brass bar is just drilled out either end to suite the motor shaft or the drive shaft, just an alignment assistant really. Then came the rudders.. Ohh deary me, what a performance trying to get them all to rotate in the same direction with the commercial types I had chosen, but finaly made it with the help of a mirror jiggery poker'ed into the hull to assist the fitting. One of the last things to be done was to fit the Transom ( shaped ) and rubbing strips..
So we are nearly there...! Regards Muddy happy Building..