OTHER:Helicopter - Outside - Intermeshing - Stepniewski (concept)
CICHE WIROPŁATY (Quiet Rotorcraft)
Implications of the Low Tip Speed Design Philosophy
byStepniewski, Wieslaw Z
NACA Report Published: Jan 01,1997 ~ Book Published: 1999
Abstract; Common to the NACA Report (23 pages) and the Book (119 pages):
In this report implications of the low tip speed design philosophy are studied with respect to
rotorcraft capable of fast cruise speed, roughly 50% higher than that of conventional helicopters.
This is done by examining effects of tip speeds on some performance and structural-weight
aspects of compounds, based on the following concepts:
His preference is; #3, the Intermeshing-ABC (Synchropter-ABC).
Sketch of the Synchropter-ABC ~ from the above two publications:
The NASA Technical Report:
TITLE: Quiet Rotorcraft
Document ID: 19970040549 N (97N31691) File Series: NASA Technical Reports
Report Number: None
Sales Agency & Price: CASI Hardcopy A03 o CASI Microfiche A03 - No Copyright
Stepniewski, Wieslaw Z. (Instytut Lotnictwa)
Journal Title: Transactions of the Institute of Aviation Scientific Quarterly o Issue: Nos. 149-150
Published: Jan 01,1997
Instytut Lotnictwa (Warsaw, Poland)
Contract Number: None
NASA Subject Category: Aircraft Design, Testing and Performance
119 pages written by Prof. Wiesław Zenon Stępniewski, which is the full version of the above report.
Initial work on translating the Intermeshing portion of this book can be found atQuietRotorcraft.html
Direction of rotation:Is outside forward. This differs from all other intermeshing helicopters, except for the UniCopter w/ ABC.
Tip speed: (Vt) 513 fps - fixed.
Some of Wiesław Zenon Stępniewski's89+ Publications:
Introduction Page | SynchroLite Home Page | Electrotor Home Page | UniCopter Home Page | Nemesis Home Page | AeroVantage Home Page
Last Revised: August 27, 2009