It is extremely difficult kiwiness to obtain blueprints, plans or drawings for the early aircraft, even reference material is very hard to come by. The Battaille for example, this was built from photos of the original machine and a restored example in the museum at Brussels, I had to scale the photos to get some sort of dimensions. It is always better if there is a machine in a museum somewhere, close-up detail photos can be made which certainly helps a lot, but this is not always the case, so in reality some of the build details are guess work. I have had to abandon my latest scratch build project for lack of reference material, all I have are a couple of photos and some crude drawings, not enough to build a model from.
Des.