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Hi,
in NASM reports,I found this drawing to a Fritz Freytag,for a strange airplane,the file is under Higgins,was
there any relationship between them ?.
in NASM reports,I found this drawing to a Fritz Freytag,for a strange airplane,the file is under Higgins,was
there any relationship between them ?.
Slideshow | NASM.1993.0055_ref541
edan.si.edu
US2315117A - Airplane construction - Google Patents
patents.google.com