Looking for original 1920 printing of 'A Treatise on Airscrews' by Whyrill E Park. Must include foldout drawing between pages 162 and 163 and another foldout drawing between pages 172 and 173. Cover quality not important. Pages must be clean and free from writing. Not interested in current...
FLIGHT International, 20 August 1977
https://www.flightglobal.com/pdfarchive/view/1977/1977 - 2478.html
Popular Mechanics, January 1980
Popular Mechanics, July 1983
I have a set of Pober Pixie plans that has a very poor rib template. The original sheet was cut and taped together. The template was then rolled and stored poorly. Over the years water and heat have damaged the template. It is unclear what the distance between the spars is supposed to be. Also...
I have for sale, unused, like new, set of plans for the Hütter Hü 17. 20 large sheets. $65 plus shipping. Drawings will be sent rolled in a hard mailing tube.
Here is a bit about it on Wikipedia: https://en.wikipedia.org/wiki/H%C3%BCtter_H%C3%BC_17