overscan said:
Topic renamed in light on new information received.
Its possible MHTV-1 and -2 could refer to existing designs - MHTV-1 might be the X-15 itself for instance.
That's an interesting idea overscan, so I decided to do a search in a few of the normal places.
I started with a search of "Hypersonic Revolution". I wasn't able to find it in several attempts.
However I did find a few matches as follows:
From pubkuc sources:
MATCH 1 - Found In/At:
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NASA Research and Technology Operating Plan Summary
Fiscal Year 1973 Research and Technology Program
Publication Year: 1972
Document ID: 19730004251
Accession Number: 73N12978
Report/Patent Number: NASA-TM-X-68856
Updated/Added to NTRS: Feb 26, 2010
What was found:
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W73-70025 501 -22-06
Flight Research Center, Edwards. Calif.
HYPERSONIC VEHICLE STRUCTURES TECHNOLOGY
Andrew E. \lano 805-258-331 1
The program will attempt to experimentally validate
significant hypersonic-vehicle structural concepts and investigate
flight-loads measuring techniques for these structural concepts
as they apply to the MHTV.
MATCH 2 - Found In/At:
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AIAA Paper No: 67-780
IMPACT OF FUTURE AERONAUTICAL VEHICLES ON DEVELOPMENT TEST FACILITY PLANNING
Lockheed-California Company
Burbank, Gulifornia
What was found:
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"A third area in which continued improvement
in test capability is required is that influencing
the development of future hypersonic aircraft.
Figure 12 shows the flight envelope of two representative
hypersonic vehicles, an aerodynamically
maneuverable lifting entry spacecraft and the
manned hypersonic test vehicle (MHTV)." ...
MATCH 3 - Found In/At:
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"DTIC Online" Search:
7.No data available
...
Collection: U.S. Air Force
http://www.au.af.mil/au/awc/space/books/spires/notes.pdf - 2.506 MB - 20 AUG 2010
What was found in that .pdf
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"Notes
Introduction. The Dawn of the Space Age"
...
62 . The remaining programs listed are:
Lifting Body Re-entry Vehicle, Manned
Hypersonic Test Vehicle, Manned Maneuverable
Spacecraft, Strategic Earth Orbiting
Base, Space Logistic Support System,
...
MATCH 4 - Found In/At:
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http://abbreviations.yourdictionary.com/mhtv
What was found (MCDonnell reference?):
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MHTV
Manned Hypersonic Test Vehicle (MCD)
Acronyms, Initialism & Abbreviations Dictionary. Copyright 2010 The Gale Group, Inc. All rights reserved.