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Approach Considerations in Aircraft with High-Lift Propeller SystemsNASA's research into distributed electric propulsion (DEP) includes the design and development of the X-57 Maxwell aircraft. This aircraft has two distinct types of DEP: wingtip propellers and high-lift propellers. This paper focuses on the unique opportunities and challenges that the high-lift propellers--i.e., the small diameter propellers distributed upstream of the wing leading edge to augment lift at low speeds--bring to the aircraft performance in approach conditions. Recent changes to the regulations related to certifying small aircraft (14 CFR x23) and these new regulations' implications on the certification of aircraft with high-lift propellers are discussed. Recommendations about control systems for high-lift propeller systems are made, and performance estimates for the X-57 aircraft with high-lift propellers operating are presented.
Document ID
Document Type
Conference Paper
Patterson, Michael D. (NASA Langley Research Center Hampton, VA, United States)
Borer, Nicholas K. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
June 29, 2017
Publication Date
June 5, 2017
Subject Category
Aeronautics (General)
Report/Patent Number
Meeting Information
AIAA Aviation Technology, Integration, and Operations Conference (AVIATION 2017)(Denver, CO)
Funding Number(s)
WBS: WBS 107210.02.06.07
Distribution Limits
Work of the US Gov. Public Use Permitted.

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