Technology Needs for High-Speed Rotorcraft

[kolibri282]

report : nasa-cr-177585
title : Technology Needs for High-Speed Rotorcraft (I)
author :J. B. Wilkerson, J. J. Schneider, and K. M. Bartie
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19910016825_1991016825.pdf

report : nasa-cr-177578
title : Technology Needs for High-Speed Rotorcraft
author: John Rutherford, Matthew O'Rourke, Christopher Martin, Marc Lovenguth, and Clark Mitchell
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19910013823_1991013823.pdf

report : nasa-cr-177592
title : Technology Needs for High-Speed Rotorcraft(3)
author: Jack DeTore and Scott Conway
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19920004821_1992004821.pdf

[kolibri282]

Please note that another two parts have been added.

[Rotor Rooter]

Thanks Juergen,

Two of the current contenders for the future are Sikorsky's X2 (ABC) and Eurocopter's X-cube. Both were built 20 years after the reports, and, both of their concepts were flown many years before the reports. Yet, neither are considered in this 3-part report.

Perhaps it is because no one, yet, has been willing or able to derive lift from the reverse velocity region of the retreating blades.
Perhaps Axial Flow is the Way to Go (http://www.unicopter.com/1612.html). http://www.unicopter.com/Devil.gif


Dave :)