Paul and Jean, Scaling the 3Dm  surface model is a single
command operation
if you are scaling  to the same scale.I looked up a few Piaggio
designs and
found the listed airfoil as a NACA 23012 at the root and a 4412 at
the tip
on both the main wing and the stabilizer and a NACA M-12 on their P7
series.  You may want to leave the wing scaled down less than the
fusaloge.          Hopefully the DXF files will have the airfoil
elements plotted with
the flap amd aleiron % of chord, if not the ordinates can be
downloaded. I
search      ae.illinois.edu canard airfoils     and use the reverse
directory to find out what is used on airframes of similar
designs, then the
main list for the ordinates.  Personally I like the Harry Riblett
airfoilson the main wing, and Rontz on the canard.
         Have you got any idea what prop clearance you need at
the rotation
point on take off.  I am thinking at the stall angle of attack of the
canard  something like 8" clearance.  It is not as much angle as
it seems
since the incidece on the canard has 3 degrees more incidence  The
full size
version has five blade props so you will likely need a minimum of
threeblades with one RH and one LH to get the disk diameter scaled
down to a
workable size.
        We will need to know if the CNC foam cutting shop wants
the airframe
sliced into workable size pieces or would want it as a complete
solid that
he can devide up at his location.  As I remember the depth of the
machineaccomodates 20" deep sections and the width and length are
something like 5
feet by 20 feet
          When you start looking for Glass cloth you might want
to call
Steve Thayer at  thayercraft.com in High Point NC.  I get 73 inch
wide from
him which reduces the number of seams. He has 3 million yards on
hand and
probably that much more lost to the inventory system. They ride
bicycles to
check stock quantities. He is building a Cozy and flies a Cessna 175

george grimes

Do you guys have a shop picked out for making the mold Bucks?  The cnc machine I use is
able to cut 20" deep x 80" x 18ft long, longer if the mold can be put on an angle [depending
on the o/a width of the buck but upwards of 20ft would be possible]. I'm in the process of
getting a 5 axis head [head/head style] designed and built for it, should make building
molds/bucks that much easier over my current 3 axis system.

Interestingly enough, I've actually designed my own 'Piaggio' type aircraft but have never built
it to date. I'll send some pics of the model later today.

Jarrett Johnson