Pretty sure I just found a few 'reports' for this on USAHEC. All Awfully archived though, the text is all messed up. 'Report' Volume 2 and 3 along with a 'aircraft engineer officers course', couldn't find volume one. If this isn't it, please move to where its appropriate.
Although it says 'reports' and 'volume', most/ parts of these seem to be stitched together correspondences/ sheets plus parts of a presentation and some of these 'volumes' seem like/are duplicates of another volume. These are not the final reports or any substantial studies/ presentations/ reports of the program.
According to these, these designs were apparently considered as 'adequate candidates' for the Army's UTTAS/ utility helicopter among other roles. No mention of Hughes here sadly. Presumably Hughes lost out in 1966.
Box:
FORT RUCKER PAPERS; BOX 2, CONSTABULARY SCHOOL COMPOSITE AIRCRAFT EVALUATION:
arena.usahec.org
All reports can be found there if links below do not work. If this link does not work, copy the title above the link into USAHEC's search bar.
Individually linked reports/ boxes within the box:
FORT RUCKER PAPERS; BOX 2, FOLDER 6, ARCHIVES AAS? VOL. 2 [PART 1 OF 3], [CIRCA 11 AUGUST- 26 AUGUST 1967] / [REPORT] COMPOSITE AIRCRAFT EVALUATION CRITERIA [PART 1 OF 3]
FORT RUCKER PAPERS; BOX 2, FOLDER 6, ARCHIVES AAS? VOL. 2 [PART 2 OF 3], [CIRCA 11 AUGUST- 26 AUGUST 1967] / [REPORT] COMPOSITE AIRCRAFT EVALUATION CRITERIA [PART 2 OF 3]
FORT RUCKER PAPERS; BOX 2, FOLDER 6, ARCHIVES AAS? VOL. 2 [PART 3 OF 3], [CIRCA 11 AUGUST- 26 AUGUST 1967] / [REPORT] COMPOSITE AIRCRAFT EVALUATION CRITERIA [PART 3 OF 3]
FORT RUCKER PAPERS; BOX 2, FOLDER 1, ARCHIVES AAS? VOL. 3 [PART 1 OF 5], CIRCA 1967 / [REPORT] COMPOSITE AIRCRAFT EVALUATION [PART 1 OF 5]
FORT RUCKER PAPERS; BOX 2, FOLDER 1, ARCHIVES AAS? VOL. 3 [PART 2 OF 5], CIRCA 1967 / [REPORT] COMPOSITE AIRCRAFT EVALUATION [PART 2 OF 5]
FORT RUCKER PAPERS; BOX 2, FOLDER 1, ARCHIVES AAS? VOL. 3 [PART 3 OF 5], CIRCA 1967 / [REPORT] COMPOSITE AIRCRAFT EVALUATION [PART 3 OF 5]
FORT RUCKER PAPERS; BOX 2, FOLDER 1, ARCHIVES AAS? VOL. 3 [PART 4 OF 5], CIRCA 1967 / [REPORT] COMPOSITE AIRCRAFT EVALUATION [PART 4 OF 5]
FORT RUCKER PAPERS; BOX 2, FOLDER 1, ARCHIVES AAS? VOL. 3 [PART 5 OF 5], CIRCA 1967 / [REPORT] COMPOSITE AIRCRAFT EVALUATION [PART 5 OF 5]
P.S: Aircraft engineer officers course is not linked here, go to box if you want it. Not much to see in it, it isn't relevant.