Hi Rob,

I got the link to work (actually google found it for me) and have taken a look.
There's not much to see, but I guess shipyards have to be careful about what they show on their websites in terms of line plans or clear photo's, showing the lines of the hull.

As the cruicial part of boating (the water) can't be scaled down, you'll have to compensate with the motorization.

To get performance in a relative small hull, you need to build light and slightly overpower the hull.
Weightwise, Lipo's and brushless motors would be the best option as NiMH and brushed motors would make the hull too heavy (mind you, it will perform, but it would sit much too deep at rest, as two 700 motors and 10-14 cells for each motor, is heavy).

Running a hull in semi displacement is torture for the motors and ESC(s) as they have to work very hard at over half throttle, making heat a real issue.
Running the boat as displacement hull would require substantually less power, but if you want to emulate the real thing, make sure everything in the drive train is 'properly' oversized, and very well watercooled, to avoid smoke on the water.

How fast does the boat have to get?
If you want to go for twin motors, two of these will certainly make the boat jump on the plane on 3S Lipo:
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5146&Product_Name=HXT_36-56_2700kv_Brushless_Inrunner_(WaterCooled)

More sedate (and civilized) would be two of these on 2 or 3S Lipo:
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5145&Product_Name=TR_28-45_3600kv_Brushless_Inrunner_(WaterCooled)

For each motor you'll need an ESC, the large motors require minimal a 100A ESC, the smaller motor need a 60-70A ESC.

The forward only brushless ESC are relatively cheap, the reversing type is a tad more expensive and hard to find.

Regards, Jan.