The foil is pretty small in comparision with other boats
My forestay was shortened 5" inches by previous owner so
a furler could be installed - It does make gybing with the spinnaker a pain sometimes as it wants to catch on the bridle foil





Patrick ragens website shows some good pictures

http://home.comcast.net/~ragenpl/nacra/nacra.htm

also you can get the assembly manual here

http://www.cathouse1.com/nacraarchive.htm

I can measure the foil this weekend for you

Hope this helps

Gordon