My first model boat that I built, was a model of the Donald Cambell " Blue Bird", It was built of balsa and covered in tissue, like a model 'plane, waterproofed by the dope on the tissue. Power was a Jetex 50, it ran, very fast( nearly flew!!) for about 15 seconds, then you had to hope you could get to it before the heat from the motor set it on fire!! It had half a dozen exhillerating runs before it got stuck in some reed and incinerated!! I salvaged the Jetex motor, which floated, and went home.It was a kit, but don't ask me whos! Next Model was a KeilKraft Eezi build "Neptune", great fun for the kids, lasted for years.