Preface

Amyot, J. R.

doi:10.1016/b978-0-444-88152-6.50004-1

Cited by 2 publications

(2 citation statements)

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“…When ACV is operating on smooth surface, cushion flow demanding Qc could be calculated by Qc=2(Lc+Bc)*He*(2Pc/ρ)^1/2，or Qc= 2Lc^5/2(He/Lc)(2Pc/ρLc)1/2(1+Lc/Bc)/(Lc/Bc), where He is the equivalent air gap between the skirt hemline to operating surface, Lc is equivalent cushion length, Bc cushion beam, Pc cushion pressure, ρ air density. For early ACV designs, He/Lc=0.05W^-1/2, while with the development of skirt technology in design and materials, statistical average hover gap was lowered to He/Lc=0.0014W^-1/3 [3].…”

Section: Based On Hover Gap (He) Methodsmentioning

confidence: 99%

Lift System Design of Air Cushion Vehicle

Zhang,

Fan,

Chen

et al. 2024

J. Phys.: Conf. Ser.

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Lift system plays key role to Air Cushion Vehcile overall performance, whose design includes cushion flow demanding analysis, lift fan design, airflow distribution and pressure control. The method to calculate cushion flow exit velocity variation with craft speed was firstly presented based on cushion induced wave. Through application development in CATIA, a full solution was presented to check if craft keeps in safety flight boundary at maximum calm water speed. Through analysis, current cushion flow demanding method based on statistic former ACVs seems conservative for particular ACV with super high cushion density, which was adviced to decrease by 10%∼15%. New double discharge lift fan for polar hovercraft was developed through CFD simulation, model test, full-scale utilizing. To reach designed bag-cushion pressure ratio, polar ACV model skirt feed holes was added by 1/3 more than simple geometrical scale. Larger bag feed holes and lower bag-cushion pressure ratio are effective means to lower lift power.

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Section: Based On Hover Gap (He) Methodsmentioning

confidence: 99%

Lift System Design of Air Cushion Vehicle

Zhang,

Fan,

Chen

et al. 2024

J. Phys.: Conf. Ser.

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“…Another solution for the maneuverability problem is an autonomous surface vehicle lacking any underwater steering or propulsion gear, such as a hovercraft, which uses airside propulsion fans and rudders to maneuver [20]. Hovercrafts are known as air cushion vehicles because they float on top of a thin layer of air.…”

Section: Introductionmentioning

confidence: 99%

Creating an Autonomous Hovercraft for Bathymetric Surveying in Extremely Shallow Water (<1 m)

Troup,

Hatcher,

Barclay

2023

Sensors

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Coastal shallow water environments (<5 m) are extremely biodiverse and dynamic yet are often mapped too infrequently or at too low resolutions to capture the important processes occurring in these regions. Common forms of coastal surveying can leave gaps in data in the shallow water zone due to optical instrument capabilities and a vessel’s ability to navigate in this region. One solution to these issues is an autonomous hovercraft that can fly over land and water and begin surveying at sub-meter water depths, bridging the gap between common optical and acoustic surveying methods. The craft’s autonomy is tested via four autonomous flight paths, or missions, and the desired path is compared to both the observed heading and direction of motion. Although the accuracy for each track in the mission varies, most headings and directions of motion of the hovercraft are within 50 degrees of the desired direction. A single-beam echo sounder was used to map the bathymetry of the study site, showing a gently sloping beach.

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Preface

Cited by 2 publications

References 0 publications

Lift System Design of Air Cushion Vehicle

Lift System Design of Air Cushion Vehicle

Creating an Autonomous Hovercraft for Bathymetric Surveying in Extremely Shallow Water (<1 m)

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