Model & full scale tiltrotor download reduction tests using active flow control

M. A. McVeigh*, J. Kiedaisch, H. Nagib, A. Stalker, T. Wood, I. Wygnanski

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


The paper describes the experimental development and full-scale demonstration of the use of periodic excitation (Active Flow Control or AFC) to reduce the airframe download on hovering tiltrotor aircraft. The initial 2-D wind tunnel experiments on a wing and flap model are described. Based on positive results from these tests, a full span, scaled, powered model of the Bell XV-15 tiltrotor was built and tested and the data used to prepare for full-scale flight test evaluation on the XV-15 aircraft. The powered model results are also described. In parallel with the model tests, a design effort was conducted to build and qualify actuators for the XV-15 flight test and to prepare the aircraft for their installation. The paper details the flight test program that successfully demonstrated the use of AFC as an effective means of reducing hover download.

Original languageEnglish
Pages (from-to)24-32
Number of pages9
JournalAnnual Forum Proceedings - American Helicopter Society
StatePublished - 2004
Externally publishedYes
Event60th Annual Forum Proceedings - American Helicopter Society - Baltimore, MD, United States
Duration: 7 Jun 200410 Jun 2004


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