Analytical Studies of the Lift and Roll Stability of a Ram Air Cushion Vehicle

Barrows, Timothy M.; John A. Volpe National Transportation Systems Center (U.S.)

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Analytical Studies of the Lift and Roll Stability of a Ram Air Cushion Vehicle

1972-12-01
By Barrows, Timothy M.

[PDF-1.16 MB]

English

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Details:

Creators:

Barrows, Timothy M.
Corporate Creators:

John A. Volpe National Transportation Systems Center (U.S.)
Corporate Contributors:

United States. Department of Transportation. Federal Railroad Administration. Office of Research and Development
Subject/TRT Terms:

[+]

Aerodynamics Air Cushion Vehicles Design Drag Ground-effect Machines Ground Effect High Speed Ground Transportation Mathematical Models Momentum Pressure Rolling Stability (Mechanics)
Publication/ Report Number:

DOT-TSC-FRA-72-10 ; FRA-RT-73-21 ; PB-219 820

DOT-TSC-FRA-72-10 ; FRA-RT-73-21 ; PB-219 820 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Department of Transportation. Federal Railroad Administration
Abstract:

A ram air cushion vehicle (a type of ram wing) is described schematically and compared with a conventional air cushion vehicle design. The nonlinear equations for the flow in the cushion region are derived. A review is made of the most recent literature on the subject of wings operating in a rectangular channel, and an approximate solution is developed which shows the relative effects of momentum and viscosity on the pressure distribution. Several analytic solutions are presented which show the effect of a small roll angle on the flow pattern; equations for the rolling moment coefficient are also obtained. It is recommended that future efforts be aimed at developing proper numerical techniques which can solve the nonlinear flow relations and that recent experimental efforts to obtain the lateral stability coefficients be continued and expanded. (Author)
Format:

PDF
Funding:

DOT-FR-307
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:e16b3a7ecf4af0eb1ba621b83a3161cc753e6853d0e1d474338be7c449ad48f5
Download URL:

https://rosap.ntl.bts.gov/view/dot/11090/dot_11090_DS1.pdf
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Analytical Studies of the Lift and Roll Stability of a Ram Air Cushion Vehicle

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