I've seen bits and pieces of pipers original drawings but outside of the National Archives this is the best collection I've found. I'm using a lot of these at full size to assist in our rebuild in my high school class.
(edit) You have to find individual drawings for the J-3. There is a mish-mash of different drawings from L-4s to PA-18s Always check the title box in the lower right corner of the drawings and look for J-3 cub . You'll need Adobe Acrobat reader or a clone at a minimum to look at them.
If you can help support this site do it, they have an amazing assortment of stuff.
https://archive.org/details/buildapiperj3
(edit) You have to find individual drawings for the J-3. There is a mish-mash of different drawings from L-4s to PA-18s Always check the title box in the lower right corner of the drawings and look for J-3 cub . You'll need Adobe Acrobat reader or a clone at a minimum to look at them.
If you can help support this site do it, they have an amazing assortment of stuff.
https://archive.org/details/buildapiperj3
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