Fiberglass floor Boat, Fiberglass floor Yacht, Fiberglass hull Yacht, Fiberglass Yacht, Model No.
Ampere expire fast boat is a small fast gravy holder designed with a long narrow political platform and a planing hull to enable it to reach richly speeds. FYI: I've started a sister thread over at the Hoverclub of America, where you have to be a member to participate. We compare hovercraft designs from around the world and analyze them for strengths and weaknesses. These efforts may lead to a description or list of desirable features in future design exercises. If the hovercraft bag side skirt is made to be of such high pressure that it acts as a inflatable pontoon - or RIB (rigid inflatable boat), then it would act like one, right? The wave impact on a RIB is turned into mechanical energy by the air-spring effect which then allows for higher speeds, right? NOTE: My design started out as a catamaran type as above, however it soon became apparent that it should be develop into a tri-hull because of it's pointed bow. I have chosen the above designs because they seem to hold the most promise for rough sea conditions, and yet are still fully amphibious. Location: Michigan Wow, I finally got a bite on this thread, kind of like fishing in a boat. When I was 13 years old (1973) I saw the inablity of the traditional hovercraft to overcome tall obstacles (as viewed by me) as a serious short coming. In retrospect the mass and weight of the craft never changes, so my partially undeveloped brain (unbiased mind) and lack of understanding eventualy grew to understand this (I hope). Location: cornfields On the helo, I would worry about the relatively wide top surface of the vehicle taking a lot of the pressure.
Note: These landing systems were very high pressure, operated with tiny holes all over the bottom of a closed bag skirt allowing escaping air to lubercate the path.
Howe was testing a new air-cushion landing gear (ACLG) developed by Textron's Bell Aerosystems Co.
Bell's ACLG permits landings on the most rudimentary runways and also on ice, water, sand, swampland, and terrain dotted with obstacles, such as rocks half the height of the inflatable bag. Originally Posted by tom kane ,and safe form of cheap transport to take the family for a picknic.The roto system is not the usual helecopter design and is simple and the mechenics have been used for years.
Location: Michigan Tom, I don't want to try to change your mind on your design - my only intent in mentioning the gyrocopter is that is one of the cheaper answers to heavier than air flight. The reason I like to make similarties between different designs is to learn what works and why.
Looking at your project with a more critical eye, one may ask; What is the problem you are trying to solve? If I could project my own personal thoughts into this - just do it because it can be done, and has not been done before! Well, that's good enough for me as long as it's not a cash or time hog impending on other worthy projects.
In a practical sense your design even on a good day has limited applications, but then again so does a basic hovercraft.
In the end, I can't see large whirling blades of a low flying, not very manuverable craft being safe or economical - sorry. Hover people are a tight nit group (so few of us) perhaps you could get a tour or free test ride. One thing that I know from watching the Universal WIG craft is that the constantly inflated skirt (while in flight) is a huge safety feature. People always say helicopters are more manuverable than fixed wing craft, I have to agree as I almost lost my lunch (felt sick) in a helicopter when I was 16 years old. When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Read on to find out how we made the conversion, what worked and what didn’t, and how we plan to get some speed in the next revision. The goal of this project was to mod an existing low-end RC boat into a magnetohydrodynamic boat, to take a lot of the effort (and cost) out of building an MHD-powered craft. Having verified that the system basically worked, the next step was to reverse engineer the existing electronics. The thrust motor was hooked up to two wires: a blue one connected to zero volts (the middle tap of the battery pack), and a brown wire connected to the RX PCB.
To interface the new battery and FET to the radio control system, we essentially want to use the signal (the brown wire) that originally controlled the motor to now control the gate of the FET. Whereas the seal between the deck and hull is a tidy O-ring, the seal around the drive shaft consisted primarily of a giant pile of grease that had to be scooped out.
Rather than using quarters for the MHD drive electrodes, I used a couple of soft steel brackets that I cut (with a hacksaw) from an old HP plotter paper tray.
To space the electrodes apart correctly, and hold them in place with respect to the magnets, I cut two black plastic brackets from another part of that same paper tray. To cover up the hole, I used a thin sheet of clear, flexible plastic (.030 copolyester) from Plastruct. In the photos you can see the hollow white shaft that the propeller shaft previously occupied. To test the ship, we filled a giant trough in our driveway with salt water and gently lowered the craft it.
The gentle breeze in our neighborhood was enough to give it pause, and the maximum velocity that we could get in our six feet of travel was only barely enough that the rudder could start to do any steering at all. The second thing that I observed is that the pattern of electrochemical etching on the electrodes was fairly uniform. Putting it all together, a good design for the next version would be to start with a larger craft that can carry one or two RC car batteries.
I recall reading back between 1988 and 1992 that Mitsubishi Heavy Industries was experimenting with MHD and had built an expensive 90 or 100 foot boat.


To help with some of your weight issues on the boat, I would suggest using Lithium Polymer or Lithium Ion batteries.
When you remove power from an inductive load, the magnetic field around the load collapses, producing a BACKWARDS flow of current. If you use a single sided the currente will flow only in the field camp and are not magnetic.
An inductor attempts to KEEP the current flowing through it in the same direction at the same value.
When you have two switches, one pulling down (as above) and another one pulling up (for driving current both ways through the load), this switch now needs reverse voltage protection when its companion switch opens. The exponential decay of current in an inductor (and now in the speaker) is very smooth – EVEN THOUGH there is many kV across the air gap in the ionized air spark! The solution is a much stronger magnetical device without resistance against the electric flood. I have brass plates on hand i will make the prototype use brass but what should i use on the final design? I've given some more though into the design and it's much smaller, total volume is about 30-50 liters. Having a prop and a high powered engine would surely make this thing a rocket What changes should I make to the design? I also tried to find suitable propellers, but that wasn't easy - is there any shops carrying these kind of high speed propellers? I think this is a bigger factor on goofy projects than in their intended use on mopeds, because the first thing that happens with goofy projects is you get the motor running but then need to fiddle with other stuff for a few minutes. Plus, the Ciao motor seems much more compact with the carb very snug to the rear of the motor, rather than at the end of a intake tube. Guest625101138 Previous Member   With the dimensions and weight you have given I expect you could get it to fly with the power you have so I want to correct my earlier comment on this.
A correctly size air propeller for this application can achieve an efficiency well above 80%.
I have not checked if they have any large enough for you hydroplane but they are the biggest I have seen for RC boats. Originally Posted by Squidly-Diddly Air cooled motors need airflow at all times and are prone to overheating otherwise. Also, Ciao's aren't as good as the vertical minarelli engine and certainly doesn't have the accessabillity to tuning parts that minarelli does. Originally Posted by Rick Willoughby With the dimensions and weight you have given I expect you could get it to fly with the power you have so I want to correct my earlier comment on this. Rick W I'm abit scared of the thought of flying that thing really, so I think I'll start off making it fly on water. You will certainly get the best speed with an air prop but a lot of factors to account for. I've been searching around for someone doing something similar, but I haven't found anyone with a air prop.
As I see it, the goal is to build a as aerodynamically stable vessel as possible while minimizing drag. I will try to make some more detailed drawings later - but atm my exams are coming up so I'll have to focus on them.
There was some outrigger designs in that first tube video there yep - but the thing is scalabillity. The fact that a water propeller would enable my boat to go in my car would be a huge plus, so size just got abit more important atm. Wallpaper that displayed are from unknown origin, and we do not intend to infringe any legitimate intellectual, artistic rights or copyright. Also I have many sketches and concept models which may never get built, but are still fun to theorize and dream about. So even a non-displacement hovercraft should be able to deflect more of the wave energy impact, or so it follows to think so. I will post model photos eventually, but want to explore concepts of others before picking away at my own work in public.
Not that should stop you from having fun with a novel idea, always something to be learned. I mean the hovercraft could not crush or roll over things that got in the way like a heavy tank could. I don't know if they landed on water, they did land on ice & snow, and they did traverse puddles along the airfield with ease (and some spray). Deflated in flight, the ACLG hugs the bottom of the aircraft without causing aerodynamic drag. I feel that if one only looks at the differences the larger picture gets lost in minor details. However horsepower limits (5 hp) are very common, hard to get a nice stretch without hitting a dam or low bridge in most cases. Form strictly a design study viewpoint you may want to address some of the day to day operating problems I've described in my hovercraft experiences. What we hoped to inherit from the RC boat was (1) a nicely shaped hull, (2) a steering mechanism, and (3) a radio control mechanism that could be hacked to control the the MHD drive. In our modified version, the thrust motor (driving the propeller) will be replaced with a magnetohydrodynamic drive.
The first step in construction is to remove all the parts of this sea creature that we don’t want. The gears between the thrust motor and the drive shaft were covered in a different kind of grease.
I screwed the FET to one of the plates, which not only heat sinks the FET (to a water-cooled fin!) but also establishes the electrical connection to the plate, since the FET’s tab is connected to the drain of the MOSFET.
After hooking up the battery and the gate of the FET, I tested the drive unit (in the kitchen) in a bowl of salt water.


I started out by cutting a square hole in the bottom of the craft with the Dremel tool as shown here, just large enough to fit the drive unit. While we might imagine the electrical current as running in a straight line between the two electrodes, it turns out that current was flowing (more or less) out from one electrode in every possible direction, in a great diffuse path towards the other electrode.
Because the electrodes themselves were ferromagnetic, they significantly distorted the field lines, reducing the volume of relevant space where the field lines could be essentially perpendicular to the direction of electrical current. I seem to recall that they had two water-flow pipes (parallel, running the length bow to stern) similar to what you mentioned as a possible improvement to your RC MHD boat here– to have sea water flow through a pipe or pipes with the magnets and electrodes appropriately located. Even though the air prop will get me better efficiency - it will probably add 4 kg just in gearing and sprockets and prop mountings to make it solid. I have some plans of how to tune it in nicely by trial and error - then to make the final welds on the offriggers.
Their propeller and motor was quite small compared to the hull - it would take a pretty big hull for me to do the same. Also a outrigger brings the huge plus that it could be built so that it can be taken apart easyer.
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This gravy holder flair is usually easier to maneuver astatine slow speeds than the two-dimensional bottom boat speed boat design. I've been building hovercraft study models since I was 11 years old, and have been aware of the existence of hovercraft since I was six years old - I'm 44 now and never grew up.
I know that the solid sidewall wall cushion vehicles are a form of non-displacement cat, in a general way.
You should know that someone has posted a computer model of a similar concept on the internet - it's blue. The hovercraft could not fly overhead like a helicopter and escape danger by going over the next hill or tree line. The varaiation on this was out board arms looking like the landing pipes of helicopters which would swing down and hop the craft up. As in the case of the simple MHD craft, that means that we need a (strong) magnet and a (large) electric current that flows perpendicular to the magnetic field. That’s an N-channel power MOSFET rated for 75 A and 25 V, with logic-level input and a nine milliohm on resistance. I screwed a standard solder-lug to the other electrode-bracket to make its electrical connection.
I then enlarged the hole significantly so that I could patch it up in a streamlined fashion that would (1) get the magnet as close to the water as possible and (2) not cause way too much drag in the water.
I’ve also reinstalled the steering motor and mechanism, so the rudder is back in place here. A straightforward way to a get moderately large volume with a strong and uniform magnetic field is to surround the region with two parallel permanent magnets. As far as a larger hull, if your budget can support it I would suggest the ProBoat ShockWave 26.
I am asking because i’m trying to build a switch that uses a FET to control a high powered motor with a low voltage remote control car pcb. All of the content we display the wallpapers are free to download and therefore we do not acquire good financial gains at all or any of the content of each wallpaper. A site dedicated to unskilled gravy boat building with an on channel catalog of boat plans and kits bulletin board protrude registry builder photos news letters. Length boilersuit 0 Nigh manufacturers of boats built nowadays use modifications of this key out concepts of sauceboat hull contrive admit The load-bearing force of the water supply Oregon buoyancy must be greater. There is a thread somewhere on this site about it - the boys bashed it around a lot - no takers. I know this is a crazy idea, but the weight of the craft is already floating on air (weightless in a sense), how much extra force would be required to gain a little altitude? And so last year, the Air Force awarded Bell a $99,000 contract for wind-tunnel tests of the ACLG.
Wide rivers can become partialy blocked by fallen tress and have powerlines and bridges crossing them. While that particular FET is obsolete, there are hundreds of suitable replacements, such as the IRF3709PBF, $1.86 at Digi-Key. In principle, you can reverse the direction of either the electric current or the magnet to flip the thrust, but I had everything glued in place already, so I just wanted to see which way to install my drive unit. The original stock radiator will be swapped for a ligthweight aluminium Intercooler that I'll rebuild to use with water. Eggington, the system employs an elastic bag made of laminated nylon and rubber attached to the underside of the plane. Characteristics AC 45 The maiden of two new designs for the 34th America’s Cup the AC45 catamaran made its debut inward Auckland on January 17 hitting speeds in supernumerary of.
For takeoffs and landings, the bag is inflated through louvers in the plane's underbelly by a fan on board. More often they fly along side terrified that they can't out run you and exhaust themselves until banking off (your design would chop them up in a worst case). If the boat were somewhat larger, I could have used one or two cheap high-performance high-capacity RC car batteries that provide more current capability.
Air is forced through hundreds of openings on the underside of the bag, producing an air cushion that holds the aircraft off the ground for silky take-offs and gentle touchdowns.
Here it is, 2006, so I take it they have not had much success with that as yet or we’d have heard about it.



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