There are some blurry cross sections, for a German WWI plane here:

http://www.homebuiltairplanes.com/forums/firewall-forward-props-fuel-system/17719-reverse-engineering-wwi-wooden-propeller.html

http://www.woodenpropeller.com/DVII.html

The length of the propeller is said to be 2800 mm.
The pitch seem to vary with engine HP, ranging from 1780 mm, 1890 mm, to 2120 mm pitch.
I've read that pitch is measured at 75% of the radius of the blade.

There is a Rhino tutorial, and a thesis with Solidworks, on google...

- Brian

A general jpg: http://www.woodenpropeller.com/blueprint.jpg
That site has more information.

Which bi-plane are you modeling?