Downwash and Outwash Library

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Title Authors Publisher Source Year Public Availability
On the Application of an Actuator Line Model for Rotorcraft Outwash Predictions Nicholas Peters and Dorsa Shirazi AIAA AIAA SciTech, Jan 2025 2025 Public link
Effects of Wake Separation on Aerodynamic Interference Between Rotors in Urban Low-Altitude UAV Formation Flight Cong Liu, et al MDPI Aerospace, Vol 11 No 11 2024 Public link
Electric Vertical Takeoff and Landing (eVTOL) Downwash and Outwash Surveys Maria J. Muia, et al FAA DOT/FAA/TC-24/42 2024 Public link
Downwash/Outwash Investigation in Support of eVTOL Landing Operations Jan Goericke, Zoren Habana, Jagdeep Batther, Maria Muia Vertical Flight Society TVF 2024, Feb. 2024 2024 Public link
Analysis of VTOL Downwash and Outwash to Establish Vertiport Safety Standards: A Theoretical Approach David Ison University Aviation Association University Aviation Association 2024 Public link
Do eVTOL Aircraft create an inherently more problematic Downwash than Conventional Helicopters? Richard Brown n/a 49th ERF, Sept. 2023 2023 Public link
Report on the accident to Sikorsky S-92A, G-MCGY at Derriford Hospital, Plymouth, Devon on 4 March 2022 n/a UK AAIB Aircraft Accident Report 2/2023 2023 Public link
Understanding the downwash/outwash characteristics of eVTOL aircraft n/a UK Civil Aviation Authority CAP 2576 2023 Public link
Safety risks from rotor wash at hospital helicopter landing sites n/a Australian Transport Safety Bureau AD-2022-001 Final – 27 Sep 2022 Public link
Helicopter Rotor Downwash Safety Guidebook n/a French Civil Aviation Safety Directorate n/a 2022 Public link
Investigation of the helicopter downwash effect on pedestrian comfort using CFD Paul Bernardo, et al ICE Publishing Infrastructure Asset Management, Vol. 8 No. 3 2021 Public link
Airbus Helicopters Safety Promotion Notice: Noise & downwash considerations for ground operators Airbus Helicopters No. 3684-P-00 EN 2021 Public link
Wind Basics for Safe Helicopter Operations n/a US Navy CNATRA P-421 2021 Public link
Draft Advisory Circular: Aircraft Wake Vortex Encounter Risk Mitigation Lawrence Fields Federal Aviation Administration AC 90-23H (circa 2020) 2020 Public link
Evaluation Of Rotor Blade Models For Rotor Outwash F. Rovere, George Barakos, etc n/a 44th ERF, Sept 2018 2018 Public link
Helicopter Wake Encounters in the Context of RECAT-EU Jimenez-Garcia, A., Barakos, G.N., Treve, V., et al n/a 43rd ERF, Sept 2017 2017 Public link
Helicopter downwash measurement using Doppler lidar Naoki Matayoshi, et al Vertical Flight Society 6th ARF, Nov. 2017 2017 Public link
Measurements to Understand the Flow Mechanisms Contributing to Tandem-Rotor Outwash Manikandan Ramasamy, Mark Potsdam, Gloria K. Yamauchi Vertical Flight Society Forum 71, May 2015 2015 Public link
Experimental Investigation of Rotorcraft Outwash in Ground Effect Philip E. Tanner and Austin D. Overmeyer Vertical Flight Society Forum 71, May 2015 2015 Public link
Rotorwash Operational Footprint Modeling John R. Preston and Sam Ferguson n/a 40th ERF, Sept 2014 2014 Public link
Advisory Circular: Aircraft Wake Turbulence n/a Federal Aviation Administration AC 90-23G 2014 Public link
Real-Time Simulation of Rotorcraft Downwash in Proximity of Complex Obstacles using Grid-Based Approaches Ludwig Friedmann, Phillip Ohmer and Manfred Hajek Vertical Flight Society Forum 70, May 2014 2014 Public link
Helicopter Downwash Effects on Ship Airwake: Predictions, Modeling from a Database, and Simulation Kyle A. Schau, Gopal H. Gaonkar, Susan Polsky Vertical Flight Society Forum 70, May 2014 2014 Public link
Rotorwash Operational Footprint Modeling John R. Preston, Sam Ferguson, et al US Army RDECOM Technical Report RDMR-AF-14-02 2014 Public link
The Selection and Application of Pedestrian Wind Criteria H.W. Fricke, J.D. Holmes JDH Consulting 16th Australasian Wind Engineering Society Workshop 2013 Public link
A Comparison of Pedestrian Wind Comfort and Safety Criteria H.W. Fricke, J.D. Holmes JDH Consulting 15th Australasian Wind Engineering Society Workshop 2012 Public link
A Comparison of Pedestrian Wind Comfort and Safety Criteria H.W. Fricke, J.D. Holmes JDH Consulting 15th Australasian Wind Engineering Society Workshop 2012 Public link
CH-47D Tandem Rotor Outwash Survey Mark J. Silva and Robert Riser Vertical Flight Society Forum 67, May 2011 2011 Public link
New criteria for assessing local wind environment at pedestrian level based on exceedance probability analysis Zhen Bu, et al Elsevier Building and Environment 2009 Public link
A High Fidelity Brownout Model For Real-Time Flight Simulations And Trainers Daniel A. Wachspress and Glen R. Whitehouse VFS VFS Forum 65, May 2009 2009 Public link
Rotorcraft Downwash Flow Field Study to Understand the Aerodynamics of Helicopter Brownout Alan J. Wadcock, Lindsay A. Ewing, Mark Potsdam, et al Vertical Flight Society Next Gen of Vertical Lift, Oct 2008 2008 Public link
An Experimental Investigation of Ground Effect on a Quad Tilt Rotor in Hover and Low Speed Forward Flight Anand Radhakrishnan Univ. Maryland Ph.D. Dissertation 2006 Public link
Analysis of Rotor Wake Aerodynamics During Maneuvering Flight Using a Free-Vortex Wake Methodology Shreyas Ananthan Univ. Maryland Ph.D. Dissertation 2006 Public link
Full-Scale Rotorcraft Downwash Surveys in a Shipboard Environment Mark J. Silva, William P. Geyer and John Nelson Vertical Flight Society Forum 60, June 2004 2004 Public link
Rotorwash Prediction Using an Applied Computational Fluid Dynamics Tool Marvin A. Moulton, James A. O’Malley and R. Ganesh Rajagopalan VFS VFS Forum 60, May 2004 2004 Public link
Rotor Outwash Ray Prouty Vertical Flight Society Vertiflite, Summer 2003 2002 Public link
Single- and Dual-Rotor Flowfield and Outwash Predictions John Liu, Michael A. McVeigh, and Ganesh Rajagopalan Vertical Flight Society Runway Independent Aircraft Specialists' Meeting, March 2001 2001 Public link
AV-8B -408 External Environment Outwash Flow Speed and Temperature Survey Robert Lake, et al US Navy NAWC-AD NAWCADPAX/RTR-2000/114 2000 Public link
Reducing the influence of helicopter rotor wash on fire behaviour Alen Slijepcevic and Liam Fogarty New Zealand Forest and Rural Fire Research Fire Trechnology Transfer Note, No. 16, February 1998 1998 Public link
Modeling Of The Dynamic Inflow On The Main Rotor And The Tail Components In Helicopter Flight Mechanics Pierre-Marie Basset Vertical Flight Society Forum 53, May 1996 1996 Public link
Rotorwash Analysis Handbook. Volume 1. Development and Analysis Samuel W. Ferguson FAA DOT/FAA/RD-93/31,I 1994 Public link
Rotorwash Analysis Handbook. Volume 2. Appendixes Samuel W. Ferguson FAA DOT/FAA/RD-93/31,II 1994 Public link
Safe Heliports Through Design and Planning: A Summary of FAA Research and Development Robert D. Smith FAA DOT/FAA/RD-931/17 1994 Public link
VTOL Downwash/Outwash Operational Effects Model John R. Preston Vertical Flight Society Forum 50, May 1994 1994 Public link
Analysis of Heliport Environmental Data; Intracoastal City, LA (data plots) Rosanne M. Weiss FAA DOT/FAA/CT-ACD33089/10 1991 Public link
Analysis of Rotorwash Effects in Helicopter Mishaps Samuel W. Ferguson FAA DOT/FAA/RD-90/17 1991 Public link
On The Estimation of Jet Induced Fountain Lift and Additional Suckdown in Hover for Two-Jet Configurations Richard E. Kuhn, David C. Bellavia, Victor R. Corsiglia, and Douglas A. Wardwell NASA TM-102268 1991 Public link
Analysis of Heliport Environmental Data; Intracoastal City (results) Rosanne M. Weiss FAA Technical Note DOT/FAA/CT-TN89-43 1990 Public link
Analysis of Heliport Environmental Data: Indianapolis Downtown Heliport Wall Street Heliport. Volume 2. Wall Street Heliport Data Plots Rosanne M. Weiss, et al FAA DOT/FAA/CT-TN87/54,II 1989 Public link
Analysis of Helicopter Environmental Data: Indianapolis Downtown Heliport, Wall Street Heliport. Volume 1. Summary Rosanne M. Weiss, et al FAA DOT/FAA/CT-TN87/54,1 1988 Public link
Fountain-Jet Turbulence William H. Foley and Dennis B. Finlay US Air Force Office of Scientific Research 1980 Public link
Prediction of Helicopter Rotor Downwash in Hover and Vertical Flight K. R. Reddy Australia DoD DSTO ARL-AERO-REPORT-150 1979 Public link
A Method for Assessing the Impact of Wake Vortices of USAF Operations George Kurylowich US Air Force Flight Dynamics Laboratory Technical Report AFFDL-TR-79-3060 1979 Public link
Helicopter Downwash Data Grady W. Leese and John T. Knight, Jr. US Army Materiel Command Miscellaneous Paper S-74-17 1974 Public link
Downwash — The Dangers and Defense Col. William B. Schane, MD, US Army Vertical Flight Society Vertiflite, May/June 1972 1972 Public link
Design Considerations for Tilt-Rotor VTOL Aircraft to Minimize the Effects of the Recirculating Downwash Environment Richard R. Pruyn and Robert B. Taylor Vertical Flight Society VFS Joint Symposium on Environmental Effects on VTOL Designs 1970 Public link
Adverse Effects Of Downwash Upon Man LTC William B. Schane, MD, US Army Vertical Flight Society VFS Joint Symposium on Environmental Effects on VTOL Designs 1970 Public link
A Report On The Heliport Environment Arthur L. Fornoff Vertical Flight Society VFS Joint Symposium on Environmental Effects on VTOL Designs 1970 Public link
Helicopter Downwash Blast Effects Study Grady W. Leese US Army Transportation Research Command Technical Report No. 3-644 1964 Public link
An Investigation of VTOL Operational Problems Due to Downwash Effects Richard R. Pruyn and Leonard Goland Vertical Flight Society Forum 18, May 1962 1962 Public link
An Investigation of the Effect of Downwash from a VTOL Aircraft and a Helicopter in the Ground Environment Thomas C. O'Bryan NASA Technical Note D-977 1961 Public link