"The documents were so old, however, that they were not listed in the modern computerized library search systems, and some of these documents were out of print." 1

NACA Cleveland library, circa 1945.
Summary
I can usually get even rare and obscure publications through inter-library loan from my public library, but these were reported as having no loanable copies available.
Discussion
I have tried the many excellent search tips at Gwern's Internet Search Tips, and now I am at the "request help" stage.
I would appreciate any help anyone can offer finding them as loanable print copies or digitally.
Recently made available
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Richard Jeck: "Icing Characteristics of Low Altitude, Supercooled Layer Clouds." 1980 FAA/RD-80/24 archive.org [ntrl.ntis.gov has a listing, but does not have a pdf file].
Thanks to the FAA Tech Center for providing a copy. -
Heat Transfer Calculation for Aerofoils RAE Rep. No. Aero …