ACCESS: Above Top Secret
- Apr 2, 2006
- Reaction score
McDonnell Douglas 1991 high-speed rotorwing (Ground Attack Role) and tiltwing (Military Transport) projects
NASA commisoned McDonnell Douglas to do the study.Skyblazer said:These seem to be labeled "NASA", not "McDonnell Douglas"...
The rotor wing was a Hughes design, so it is possible that these as MDD after all, but one is never careful enough with these reports, which often contain merely notional designs and not necessarily company projects, even if the report itself was commissioned from a certain company by NASA!
yasotay said:NASA commisoned McDonnell Douglas to do the study.
In order to not restrict concept selection and creative thinking, NASA only specified the concepts to be of helicopter-like disk loading and capable of forward flight in the 450-kt range.
Due to the amount of initial concept exploration in the mid-60s, including whirlstand, wind tunnel, dynamic model conversion, and transonic tests, much is known about this configuration. The XH-17 and XV-9A technology demonstrators incorporated reaction drive rotors in their designs. (...) Data from the 1960s wind-tunnel tests, completed by Hughes Tool Company, determined the lift and drag characteristics of various centerbody shapes.