PBY-5 and -5A Manuals can be read here, but downloading requires registration and a payment :-
https://www.avialogs.com/search-resu...s&word=UEJZLTU
We had a USAF War Studies Instructor at Cranwell at the start of the 60's. He said that the PBY took-off at 90, flew at 90, and alighted at 90. Methinks he may be outed by close study of these manuals as having been somewhat economical with the truth...