Large post-war open-ocean seaplanes - references

[AeroFranz]

I am looking for good references discussing open-ocean seaplanes. I have already scoured this site, DTIC, and the other usual sources, of course.
Is there a book on the ShinMaywa US-1/US-2 you would recommend? Bear in mind, sadly i do not read Japanese.
I have also thought about inquiring with government archives. Pardon my ignorance in the matter, but what institution would hold technical information on seaplanes? Is it the Navy Archives in DC?

 

[TomcatViP]

Have you checked with the San Diego Museum?

 

[Bill S]

US National Archives Proposal Files for Airplanes, Helicopters, and Missiles, 1934–1961
As an example Boxes 46-47. The Spangenberg Index is your friend

 

[AeroFranz]

Those are excellent suggestions. Indeed, it's likely the San Diego Museum inherited a lot of the Convair material. I will start with the National archives, which are closer by (I'm on the East coast).
@Bill S , much appreciated the links!

 

[Richard N]

These Famous Aircraft of the World books are the best Shinmaywa flying boat references I've found. I got them from eBay and https://www.amazon.co.jp/

I have never seen an English Shinmaywa book and these are in Japanese. To read all of my non-English publications and especially digital media on my tablet, I have been using the Google Translate app on my iPhone.

The following video shows how to use the Google Translate app and at 3:30 it shows how to use your phone's camera to do realtime translation of print text. It works very well on a monitor or tablet screen. I assume you can probably use this app with an Android tablet or iPad.

View: https://www.youtube.com/watch?v=W0JQqkKjHZw