I’m looking for photographs, articles,books, letters about the development of the helicopter for a book I’m writing. All materials will be available to the public free on this web site.

The American Helicopter Magazine is a model of how I’d like to presnent the materials I collect here.

If you have such materials, in text, Word, PDF, jpg, .mov, avi, then check with me at helihistory@robertcmason.com to see if I already have it.