The Influence of New Technology On The Design and Manufacture of High Speed Craft With Special Reference To Recent Monohulls, Multihulls, Air Cushion Vehicles and Surface Effect Ships

2004 ◽  
Author(s):  
J L Allison ◽  
◽  
B G Forstell ◽  
D R Lavis ◽  
J Purnell ◽  
...  
Keyword(s):  
Special Reference ◽  
High Speed ◽  
Surface Effect ◽  
New Technology ◽  
Air Cushion ◽  
Design And Manufacture ◽  
Air Cushion Vehicles

Jets, Props and Air Cushions: Propulsion Technology and Surface Effect Ships

1968 ◽  
Author(s):  
Alfred Skolnick ◽  
Z. G. Wachnik
Keyword(s):  
High Speed ◽  
Surface Effect ◽  
Broad Scope ◽  
The Status ◽  
Air Cushion

Following a brief review of the background and formulation of the jointly sponsored Navy/Commerce Department’s Surface Effect Ships (SES) Program, the paper offers a broad scope presentation on propulsion for SES, e.g., waterjets, supercavitating propellers, and lift fans. The problems associated with establishing the feasibility of successful designs and construction of such ships are considered, the status of development assessed and the efforts still remaining accordingly” defined. The paper deals primarily with the propulsion considerations of high speed ships using the air cushion principle in combination with vestigial rigid sidewall design.

Full-scale Performance of the SES Motion Control System

2015 ◽  
Author(s):  
Øyvind F. Auestad ◽  
J. William McFann ◽  
Jan T. Gravdahl
Keyword(s):  
Control System ◽  
Motion Control ◽  
High Speed ◽  
Wind Farm ◽  
Surface Effect ◽  
Vertical Plane ◽  
Full Scale ◽  
Offshore Wind ◽  
Motion Control System ◽  
Air Cushion

The pressurized air cushion on a Surface Effect Ship (SES) can lift up to 80% of total vessel mass. The SES Motion Control System (SES-MCS) controls the vent valves which again controls the air cushion pressure, assuming lift fan air flow is pressurizing the air cushion. By controlling the air cushion pressure one can significantly counteract vertical sea wave disturbances, ensure high passenger comfort and reduce sea-sickness. The case studied in this work is the Umoe Mandal Wave Craft prototype, ’Umoe Ventus’, which is a high-speed offshore wind-farm service vessel specially designed for control in the vertical plane. The SES-MCS can adjust the draft from 1m to 3.2m in less time than the wave period. The SES-MCS can reduce motions significantly in order to perform Operation and Maintenance (O&M) in high seas. The craft is the fastest wind-farm service vessel of its size with high comfort in all relevant sea states. The performance of the SES-MCS is demonstrated through full-scale sea trials.

Paper 2. Problems and Requirements of Directional Stability, Control and Manoeuvrability; High-Speed Craft

1972 ◽  
Vol 14 (7) ◽  
pp. 6-13
Author(s):  
M. C. Eames
Keyword(s):  
High Speed ◽  
Stability Control ◽  
Paper Briefly ◽  
Planing Craft ◽  
Stability And Control ◽  
Directional Stability ◽  
Air Cushion ◽  
And Control ◽  
Air Cushion Vehicles

The problems of stability and control of high-speed craft are somewhat different for the various vehicle types. The first part of this paper briefly compares characteristics of air-cushion vehicles and planing craft. This is followed by a more detailed discussion of the problems and requirements of hydrofoil craft.

Dynamic Interactions Between Long, High Speed Trains of Air Cushion Vehicles and Their Guideways

1971 ◽  
Vol 93 (1) ◽  
pp. 16-24 ◽  
Author(s):  
James F. Wilson ◽  
Sherrill B. Biggers
Keyword(s):  
High Speed ◽  
Span Length ◽  
Static Deflection ◽  
Dynamic Interactions ◽  
Suspension Systems ◽  
Passenger Safety ◽  
High Speed Trains ◽  
Air Cushion ◽  
Vertical Accelerations ◽  
Air Cushion Vehicles

Trains of high speed air cushion vehicles traversing simple spans are modeled as uniform pressure segments traveling at arbitrary speeds over identical Bernoulli-Euler beams. Series solutions are found for the transient span and vehicle responses where the trains overlap several spans at a time. Elastic foundation, span tension, and span damping effects are included. Conclusions reached after studying some realistic numerical examples for constant-speed trains on elevated spans are: (a) for trains which are longer than one span length, the dynamic deflection factors (maximum ratios of dynamic to static deflection at midspan) approach 2.0 at speeds between 300 and 600 mph, and occur as the end of the train approaches, midspan; (b) these dynamic deflections may be reduced by the addition of damping, by a reduction of span length, by the addition of span tension, and by an increase in span stiffness; (c) the high vertical accelerations of the vehicles, which may approach 2 g’s at speeds of 300 mph, show the need for advanced suspension systems to insure passenger safety and comfort.

III—The Rhyl–Hoylake Experiment

1962 ◽  
Vol 15 (4) ◽  
pp. 369-374
Author(s):  
L. R. Colquhoun
Keyword(s):  
High Speed ◽  
Air Cushion ◽  
Air Cushion Vehicles

This paper has been written with the SRN-2 and VA-3 type of craft in mind; they are basically over water craft but with a capability of operating over land for the purpose of embarking or disembarking passengers and freight or of crossing mud flats or sandbanks. Immersed sidewall craft have not been considered since their problems are similar to those of high-speed launches. Overland air-cushion vehicles will, as Mr. Lamb has pointed out, most likely operate over prepared routes and therefore navigation should not present any problems.The main advantage offered by air-cushion craft is speed. The second advantage is its amphibious capability. Because of this an air-cushion craft can operate routes that are out of the question for any other kind of vehicle except perhaps a helicopter. An example of such a route is the proposed Rhyl–Hoylake ferry, which at low water is almost an overland route.

Multihull and Surface-Effect Ship Configuration Design: A Framework for Powering Minimization

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Ronald W. Yeung ◽  
Hui Wan
Keyword(s):  
High Speed ◽  
Surface Effect ◽  
Early Stage ◽  
Base Line ◽  
Total Displacement ◽  
Surface Effect Ship ◽  
Linearized Theory ◽  
Air Cushion ◽  
New Formula ◽  
Analytical Expressions

The powering issue of a high-speed marine vehicle with multihulls and air-cushion support is addressed, since there is an often need to quickly evaluate the effects of several configuration parameters in the early stage of the design. For component hulls with given geometry, the parameters considered include the relative locations of individual hulls and the relative volumetric ratios. Within the realm of linearized theory, an interference-resistance expression for hull-to-hull interaction is first reviewed, and then a new formula for hull-and-pressure distribution interference is derived. Each of these analytical expressions is expressed in terms of the Fourier signatures or Kochin functions of the interacting component hulls, with the separation, stagger, and speed as explicit parameters. Based on this framework, an example is given for assessing the powering performance of a catamaran (dihull) as opposed to a tetrahull system. Also examined is the wave resistance of a surface-effect ship of varying cushion support in comparison with that of a base line catamaran, subject to the constraint of constant total displacement.

Sign in / Sign up

Export Citation Format

Share Document