Explore hovercraft with free download of seminar report and ppt in pdf and doc format. Assistant professor, new horizon college of engineering, bangalore. Hovercraft finger or segmented skirt provided by 4 wings. Note the 10mm step at the bottom edge formed by the duct front and duct front doubler. Hovercraft seminar report, ppt, pdf for mechanical. Construction of a hovercraft model and control of its motion by jeffrey schleigh advisor. A hovercraft is a vehicle that, flies like a plane but float like a boat drive like a car it can hover over or move across land or water surfaces while being held off from the surfaces by a cushion of air. Straight fingers are best used at the bow of a hovercraft. The early skirts were designed on the basis of model testing and prartical. This craft differs from pervious attempts at skirtless hovercraft in several ways. The design of the shape of the skirt panels so that when they are sewn together they take up the desired 3d shape is not immediately intuitive. A hovercraft, or aircushion vehicle acv, is a craft.
You can make skirts out of various materials, but the skirt has to be heavy duty and able to withstand abrasions. Development of a integrated air cushioned vehicle hovercraft. The photograph in figure 3 shows the royal national lifeboat institutions rnli hovercraft. This was made as an experimental machine to test out a construction technique.
It is light and very strong, the skirt is still going without holes after 12 months use on land and water. It worked but i decided that it was not an improvement on existing methods. After the skirt was made, the hovercraft was inverted and a soldering iron was used to poke holes in the skirt while it was inflated by the lift fan. The model hovercraft association page 1 of 8 kiddy craft mkiii by. Hovercraft skirt design and manufacture sage journals. High quality replacements provide better performance than original equipment. The flow of air leaving the hovercraft air cushion is directly proportional to the craft peripheral length and hovercraft height. Blowing air into the hovercrafts skirt, creating a highpressure pocket, produces lift. The outer skirt edges are now attached, completing installation of the bag skirt. We are always adding but if you need some help let us know and we will add it here to help you and others. Richard bristow introduction the kiddy craft is intended to suitable for the unskilled hovercraft pilot being as indestructible as is possible.
As the hovercraft lifts, the skirt extends below it to retain a much deeper cushion of air. Building a hovercraft requires more than just woodworking skills. The proposed design also claims to have the ability to navigate obstacles such as. A hovercraft international journal of engineering and management. However, its not too difficult to generate the shape needed, as long as you limit yourself to a skirt. Keerthana assistant professor, new horizon college of engineering, bangalore. New segments slide into a special slot along the crafts edge without the need for mechanical fasteners, which enhances the hovercraft s sleek, agile appearance.
This page contains hovercraft seminar and ppt with pdf report. Hovercrafts need a durable skirt around their perimeter to entrap air. The air rider hovercraft hybrid skirt features the stability of the loop skirt and the frontal non buffeting smooth ride of the segment skirt. Hovercraft skirts feature an inventive quickchange system that allows the pilot to replace skirt segments in the field without the need for any tools whatsoever. The hull, with skirt installed, back on the ground for installation of the bench seat and topside paint. Home built hovercraft plans freeallowed to the blog site, on this time i will explain to you with regards to home built hovercraft plans free. Most of my models are based on marks design and i must give him credit for his skirt design which i have used on all but one of my models. The construction of the skirt is done by sowing the material at the corners given a design that is sufficient for the craft to hover. How to build a hovercraft free plans plans 1 to 8. Hovercraft skirt design and manufacture r l wheeler, a n. It is filled by air and creates a cushion for the craft to be supported on. What materials can you use to make a hovercraft skirt. Construction and analysis of a remote control hovercraft.
Our x0 denier polyester has better tear resistance than the commonly used vinyl coated nylon fabrics. A hovercraft has 1 giant or 2 fans mounted centrally which helps to lift it above the surface. The hovercraft s skirt, which is labelled in figure 3, traps much of the air being forced under the craft and creates a cushion of air pressure. Draw a rectangle of width equal to half the hoverheight and of height equal to the skirt length from the nose of the hull to the ground contact point. Hovercraft projectseminar report pdf and ppt download for. These hovercraft are unique because they feature reverse thrust buckets that are able to close behind the thrust fan and redirect airflow towards the front on the craft, causing it to slow down or move in reverse. Pdf the design and development of a hovercraft prototype with full hovercraft basic functions is reported. The skirt of a hovercraft is one of its most design sensitive. We chose a bench seat, which we are installing here. Body and frame jeremy siderits 2 figure 2 shows a hovertrek, manufactured by neoteric 4. The development of the skirt enables a hovercraft to maintain its normal operating speed through large waves and also allows it to pass over rocks, ridges and gullies. Often imitated, but never surpassed, each neoteric hovercraft is a fusion of advanced technologies and skilled, handson workmanship, always adhering to the highest quality standards in.
Then join the skirt together and mount it to the hull. To design a straight finger you must draw the crosssection of the skirt under the bow and make a paper template to this shape. Also, this type of skirt system is not prone to snagging in shallow stony rivers or undulating terrain. The material i used is a rubberised nylon material used for tent making. Also explore the seminar topics paper on hovercraft with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020. When in hovercraft mode, it uses hydraulic powered lift fans with belt driven ducted fans for propulsion. No water has ever entered the interior of the skirt chamber during this time. What type of skirt is best suited to small scale hovercraft. A great place to start with rc hovercraft is mark porters website all you need to get a good working hovercraft first try. Most of the free hovercraft plans identified below require knowledge of mechanics and the ability to work with a variety of materials including plastics and metals. After some initial investigation it was found that there were three different types of hovercraft skirt which we could use. The skirt design determines the life of an acvs to hover. The first action when designing a skirt is to decide upon the main use to which you will put the hovercraft and the type of terrain over which you intent to operate it. A hovercraft is a vehicle that, flies like a plane but float like a boat drive like a car it can hover over or move across land or water surfaces while being held off from the surfaces by.
Actually no it wasnt in the film, but it i has been on both those craft i was doomed from the beginning. The aim of this project was to design and model a hovercraft with. The latter chapters describe a design methodology, including design criteria and standard methods for estimating craft performance, lift system design, skirt design, hull structure, propulsion systems and power unit selection. The skirt of a hovercraft is one of its most design sensitive parts. First, the jet stream producing source is positioned outside the main body in the form of rotor blades above the main body. The development of skirts enables a hovercraft to maintain its normal operating speed through large waves and also allows it to pass over rocks, ridges and gullies. When this force equals the weight of the hovercraft, it hovers. In october 1961, latimerneedham sold his skirt patents to westland, who had recently taken over saunders roes interest in the hovercraft.
The model hovercraft association page 3 of 8 the duct and the air splitter require that the the duct front, the duct front doubler and the duct ring are glued together. In order to better understand hovercraft design for our scale of a craft, we purchased three sets of plans from universal hovercraft a. The hulls design depends on the load that will be carried by. Construction of a hovercraft model and control of its motion.
Bag skirt pattern design for model hovercraft the following is one of many methods to design a bag skirt pattern for model hovercraft such as the griffon 2000. Always insure that the hovercraft that you have built is 100% safe before you let the kids play with or ride on it. Hovercraft are perfect for coastal and inland commercial usage, where boats and other commercial vehicles simply cannot operate. The skirt in hovercraft acts as a wall to cover the air cushion underneath the vehicle. Please contact me if you want any further details on the craft shown. In order to reduce the flow and the power required to maintain it, flexible skirts were developed, allowing the hovercraft to maintain a reasonable hover height with a few centimetres air escape gap and minimal bleed. The variables used in this equation are the same as the variables used in the previous equation. Includes newlydeveloped antiplow front segments that. Hovercraft design and operation four basic parts of a hovercraft. An englishman named christopher cockerell developed and patented the first official hovercraft in 1950s. The responsive skirts fitted to large crosschannel hovercraft, the super 4, and the latest coastal craft, the ap 188100 were developed using these. I used uhu por for this instead of the hot glue used elsewhere. This was carried out by developing computer programs to design the sectional shapes, investigate the quasistatic behaviour and derive the flat pat tern shapes from which the skirt is made.
Design and analysis of winged hovercraft longdom publishing sl. Much technical information, data, and references to further work on hovercraft and ses design is provided. Australian hovercraft for cost effective custom built quiet oceangoing hovercraft and surface effect craft takeoff fully laden on natural surfaces at boat costs. Hovercraft projectseminar report pdf and ppt download for mechanical engineers introduction to hovercraft. Basically, the hovercraft design and fabrication process is quite similar to boat. For a cruising craft that will be operated over water you will probably opt for the smooth but stable ride of the bag and finger skirt. It is a vehicle that flies like a plane but can blow like a boat, can drive like a car but will cover dump and gullies as it is a flat terrain. Please study the figs 1 to 5 to help understand the process. Abstract a hovercraft, or aircushion vehicle acv, is a craft designed to travel over any smooth surface supported. Little research appears to have been done on the theoretical aspects of nozzle design fcr skirt application e. Specifically for our hovercraft, has three main design groups.
You can see the thrust duct used on a later design. As the hovercraft lifts, the skirt extends below it to retain much deeper cushion of air. Hovercraft service is suspended for several weeks each year while the river is beginning. The first plan for a hovercraft was made, but it was never made because no human effort lifted it. There are two options for seating on the pegasus hovercraft. Design of a hovercraft model during the first two weeks, a literature survey on. The skirt also helps to force air against the surface directly below the hovercraft. The hovercrafts skirt, which is labelled in figure 3, traps much of the air being forced under the craft and creates a cushion of air pressure. Pdf design of a working model hovercraft unyime okon. For the people who have asked, this should help you make the skirt. Control of the motion of the constructed hovercraft model.