We are working on a seastead design which is kind of a funny trimaran.


Above the water there will be a big triangle frame.  The two sides will be 80 feet front to back and 
the back part will be 40 feet side to side.

There will be 3 floats/legs/wings that will be the buoyancy.
Each leg will 19 feet long and in the shape of a NACA wing with 10 foot chord and 3 foot width.

Each of the 3 legs will be attached to the underside of the big triangle near one of the 3 points and going down into the water.
For each leg will be 50% under the water (so 0.5 * 19 feet) and the top 50% out of the water.

Please give the dimension for a Fraude model 1/10th scale in both inches and feet.   

We will use a 2 part foam mix that is 2 LBS/cubic-ft when expanded.  We will use the same mold
3 different times to make the 3 legs.   In each batch of foam (for one scale leg) how much 
in cups of each part of the mix should we use?

Also give the total target weight for the full scale and the scale model in lbs (both will be in Caribbean sea water).

Also, we want to pull the scale model at a speed simulating 5 knots and get a number in lbs.
What speed to we aim for in feet/second?
Please do the math to get one costant that I can multiply the lbs reading from our sensor on the scale model
to get the electrical watts needed going into the thrusters on the full scale to move full scale at 5 knots.

If we can measure a natural roll period on the model what do we multiply that by to get the roll period of the full scale?