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Location: Holland Longtail Think the river boats bhnautika mentioned are know as longtail boats. The flat bottom makes it plane easy and becouse it is not to wide it will be quite efficient when it does not plane.
When rechargeable batteries are not permitted it is very unlikely the solar panels alone will provide the power needed to plane. Please forgive missing prop, this is just a very basic scetch, hope proportions or sort of right. Location: Holland Planing solar models Great to see you have this experience already, sorry if my remarks about hulls not planing offended you. One of the problems is that you need to get to planing speed so the hull also must be efficient in non planing mode.
Perhaps you can post a new thread asking for advice on a book on powerboat design that explains the basics. As the race track is in a straight line it is a very good idea to tilt the solar panels towards the sun. Location: Perth, Australia Solar Boat Design My son is also wanting to build a model solar boat but is uncertain on hull design, motor size and propellor. Location: australia Dill the main decision that needs to be made is, do you want to go fast or slow and the available power you have.
Location: Bundaberg Australia dill, is your son involved in the same competition as my son and students are? Location: Bundaberg Australia dill, if you're in australia there is the opportunity for your son to enter solar challenge if you wish.
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Julian Edgar, 50, has been writing about car modification and automotive technology for nearly 25 years. The MTC consists of technical competitions designed for school students, both primary and secondary. I went along primarily to watch the human-powered race but found myself much enjoying the solar-powered boats.
The differences in boat performance were extraordinary – some boats just plugged along while others lifted their polystyrene noses and powered through the water, leaving a substantial wake. The CO2-powered drag racers also looked fascinating; however time constraints meant I could only see a few runs made. The course, a street circuit with an added hairpin, was largely an endurance layout rather than having challenging corners.  And endurance was certainly needed – for this was a 24 hour race. I went back to my motel, had a few drinks, checked the current race standings on-line, then went to bed. At 9 o’clock the next morning I was back, having had a good sleep and a relaxing morning coffee.
And there were crashes – I saw one very tired rider make the mistake of pulling on the right-hand brake caliper instead of the left and steer straight into a barrier – and the teams were talking about a roll-over.
I wasn’t there for the finish but the top six machines didn’t change much over the last 12 hours of the race. I was a rider in the racv energy breakthourgh evert in maryborough, victoria, & it was sponsored this event 2!
Enter your email address to subscribe to this blog and receive notifications of new posts by email. This image is featured as part of the article Vripack Solar Team to race in the 2012 Frisian Solar Challenge. While most, if not all, information has already been transferred from the old website, the new Tasmanian Model Solar Challenge website is still under construction and new material is expected to be added.
All new information regarding the 2008 TMSC and AIMSC events will be posted on this website. The Tasmanian Model Solar Challenge Committee would like to provide as much information as possible on this website to challenge competitors. The Tasmanian Model Solar Challenge is an exciting hands-on Science, Engineering and Technology competition for schools. The TMSC consists of 3 separate sub-events: a model solar sprint car, model solar boat and model solar AIMSCC car Challenge.
The Tasmanian Model Solar Challenge resides in under the umbrella of the Australian-International Model Solar Challenge which sees the top entries from all states and territories compete against one another in the quest to be crowned the fastest model solar powered car or boat in the country. While the challenge is all about having fun and learning, there is a competitive side to the event and vehicles are often produced to a very high standard. Below is a short promotional video clip produced by the Sustainable Energy Association of Australia for the WA event.
Melbourne's Swinburne University of Technology, major sponsor of the Victorian Model Solar Challenge, also recently put together the following video on the solar challenge. New rules for all 3 TMSC competitions are released at the start of each school year by the event's national body, the AIMSC. Some schools integrate the Challenge into their curriculum as an elective short course while others set aside lunchtimes and occasional after-school sessions to work on their cars and boats. Students may even like to undertake the Challenge as a personal project and complete their entire car or boat at home. Model solar boats are even simpler to construct and ideal for younger primary school-aged students, yet the thrill of competition and the learning outcomes are just as great.
The 2013 Powercom Tasmanian Model Solar Challenge will be held on Saturday November 9th at New Town High School.
There are no event entry fees and teams must simply fill out an online entry form before the day of their event to register.
Parents, friends and other interested spectators are welcome to come along and observe the day's competition. The event will be held on a portion of the New Town HS oval which is most easily accessed from the visitor parking area around the back of the school. Things will kick off at around 9:00am and a detailed schedule of the day's competitions will be issued over the coming weeks. Given that tracks and pools will need to be assembled on the day, teams (particularly from southern-based schools) are encouraged to come along a little earlier and assist the committee with setting these up.
Placegetter and other awards will be presented at the conclusion of the event with top teams then being selected to represent Tasmania at the National Championships in Melbourne on November 23 & 24.
For car design hints and help see the website's CHALLENGE HELP page or checkout photos of past cars on the GALLERY page.
Top place getters in this event will then be eligible to represent Tasmania at the national event in Melbourne on the 23rd and 24th November.
Please note that only teams selected to attend the national event will be required to construct a poster as per regulation 3.6.

Please note that teams will not be required to produce a poster for the Tas boat event as has been outlined in section 2.6 of the national rules.
For boat design hints please see the website's CHALLENGE HELP page or checkout photos of past boats on the GALLERY page. The Solar Sprint Car Challenge is a simplified and lower cost version of the main model solar car challenge and is aimed to introduce new students to model solar car racing. The 2013 sprint challenge will be held in conjunction with AIMSC car and boat events on Saturday November 9 at New Town HS. Registration for the 2013 Tasmanian Model Solar Challenge is now open and will remain open up until November 7.
This will be updated regularly and teams are advised to check this list to make sure that they have been entered.
In case of any discrepancy, please contact Marc at the email address provided on the website's CONTACT page.
The 2013 Australian-International Model Solar Challenge will take place at Science Works, Melbourne, Victoria on Saturday 23rd and Sunday 24th of November. Originally Posted by portacruise Rick, I picked up a bolly yesterday approximately 11X8 inches from a discontinued bin for $2 from a hobby shop. The amount of power in the sprint is getting beyond what the Bolly will deliver efficiently so there might be something else more suitable. There is also the fact the the 90 minute efficiency run gets a lot more points so that it what needs to be the focus. The rules require the boat to have controllable speed and you do not want to achieve that by manual switching.
Location: USA Rick, I agree it wouldn't be practical to use series-parallel switching for this racing situation. Looking at the motor curves and the 55# battery limit, what do you think of using 3 -17 or 18 lb. At least for the drag racing part, the batteries only need to hold maybe 30 volts for probably under 30 seconds, or whatever the record is. The motor and controller look well suited to 24V and this gives a good motor shaft speed for direct connection to the Bolly prop. For the sprint the current is starting to get high for cables that are not going to be significant in the total weight. They are permitted to use two different battery packs but they must be charged from solar power through the day.
I have not looked at what a smallish outboard prop might do but it is worthwhile considering.
Location: los angeles Sorry Rick, when I refer to the Da Rules, I am referring to the rules of the Solar Cup Competition that dictate and control all aspects of design.
We can use no more than 24 volts, I just read there is a mandatory 350A fuse inline btwn the batteries and the motor. As a final note these competitions aim to encourage leadership and teamwork as well as the technical aspects. Location: los angeles Rick, your outlook on this project and the importance you place on organization and division of the duties is something I am stressing with the kids. As far as the batteries, we will be getting new batteries this year so They should be putting out pretty much peak volts and amps. With respect to design from motor to propeller, you would run the spring steel from the motor shaft through the stuffing box and shaft log to the strut?
That prop may actually be better than a Bolly for the high speed but the Bolly will definitely be more efficient for the efficiency run. If you give me the pitch and diameter of the prop you have I will do some performance comparisons with the Bolly boat prop. Going for efficiency with a high aspect blades requires the prop to be aligned with flow to avoid high shaft loads and vibration.
The Bolly prop is 390mm in diameter and only needs to have about 20mm clearance to the hull. Location: Hawaii I am in the process of designing and building a live aboard solar catamaran.
You should know that using Solar Photovoltaic Energy request some calculations, to define the total power needs, and quantity of solar panels in order to succeed electrical requirements (notice that monthly solar radiation average is not the same according period of the year). You would probably be really disappointed to discover the total solar panels quantity is quite big and you will start to worry not to get enough place on board for that!!! Location: Saint John New Brunswick I concur with HB Marine that solar panels can be misused. Originally Posted by Jamie Kennedy I concur with HB Marine that solar panels can be misused.
HB Marine Previous Member   SunSeaRider 16 (Solar Electric Catamaran) Innovation is great guys! The propellor in the pictures is tilted very much this also is not very efficient, i'd place the engine as low as possible to make it more efficient, also good for balance.
Perhaps you can make them adjustable to compensate for the sun angle at the time the race is run.
A lightweight catamaran will move along with much effort where as planning hulls need more power.
He has owned cars with two, three, four, five, six and eight cylinders; single turbo, twin turbo, supercharged, diesel and hybrid electric drivelines.
One student that I quizzed told me the electric motor driving his craft was Swiss-made – it was about as big as an AA cell yet gave the boat amazing performance. Constructed by the schools involved (although, some schools had done all the construction themselves and others had farmed things out to external tradespeople – a bit of a cop-out), these vehicles consisted almost entirely of recumbent trikes. The school teams, complete with pit area tents and full support teams, ran a roster of riders but each machine had to go the full 24 hours. The headlights and tail-lights were on by now, and the first signs of mechanical failings were starting to occur.
And there they still were, those racing machines, pushing their way around the track, the local SES emergency volunteers looking sleepy and bored, the dwindled spectators subdued and red-eyed. The steering on one machine went into radical shimmer as the tie rod fell off and some machines literally rattled their way around the whole course.
Their second task was to research sustainable energy and present their findings in a short movie using an ipad. We have crewed charter boats in the favourite yachting hotspots in the Mediterranean and Caribbean as well as worldwide locations.
It links concepts learnt in the classroom with the physical world and acts as an effective motivator for students to remain engaged in the areas of science and mathematics at school.

New rules for all 3 competitions are released online at the start of each school year and students then have most of the year to complete their solar vehicles for racing. Teachers and mentors involved in a school team participating in the inaugural World Solar Challenge had found it to be highly educational and felt that a simpler and lower cost version of the event should be created to bring the experience to schools with much lower budgets, funding and technical knowledge. This contains footage from the 2010 Australian-International Model Solar Challenge finals and features a number of Tasmanian teams and cars. Please upgrade your browser to a later version such as Internet Explorer 9, Firefox 4, Chrome 6, Safari 5 or Opera 10.6. The competition is open to any school-aged teams up to year 12 and there are no entry fees. Teams then have the majority of the year to design, construct and get their entries prepared for the event.
Teams are not just restricted to working on their vehicles at school either and students may also choose to continue building and testing at home.
Teams of students ranging from year 9 to 12 typically enter this event although students younger than this have been known to compete in the past. Although this challenge is open to students up to year 12, the event is primarily aimed at primary (year 5 and 6) and early secondary (year 7 and 8) students. The boat event is split into 2 divisions, a Junior and Advanced section, where the junior section is open to students up to grade 6.
Late on-the-day entries will still be accepted but teams are encouraged to enter online so the TMSC Committee is able to form some idea of entry numbers. There is no requirement of such a poster for the Tas event, nor are any team interviews conducted as per regulation 3.7. Only those teams selected to attend the national event held in Melbourne on the 23rd and 24th of November will be required to supply a poster. The challenge is a basic entry level competition and has been designed to give primary and lower secondary students an introduction to the scientific, mechanical and electrical engineering concepts involved in designing, building and racing a model solar car. If the rules allow, the batteries could be switched out for others with better reserve capacity (if needed) for the 90 minute run. Appoint a project manager - someone with leadership skills, respected by the team members, able to delegate and include, ability to get others enthused about the project etc.
A quality manager - someone assigned to know the rules inside out and exactly how the scoring works.
If your engineering group would be interested in the facts on the subject send me an email. Batteries are heavy and according the total requested power, you will be surprise of total requested batteries to be loaded on board!!! The technology can be misused, but the energy return on energy invested is not great, and depends a lot on where it is used, how it is placed, and whether or not the energy available can be utilized.
They also solved the shaft trough hull problem (please see picture, the bow ends in a very high point, would like an explanation for this but think students can omid it).
As mentioned before wheight is a very important factor here, the less weight to lift out of the water, the easier it planes.
He lists his transport interests as turbocharging, aerodynamics, suspension design and human-powered vehicles. Amongst other events, they consist of pushcart races, solar-powered boat races, robotics challenges, CO2-powered miniature drag racing and a human-powered vehicle race.
I watched them head off at 1pm, the students fired with enthusiasm and riding like their lives depended on it. A chain not meshing smoothly, a drink bottle hose trailing behind a red-faced rider, one machine without its headlight working.
Parents were invited to view the movies and the whole school enjoyed exciting racing on our purpose built 10m pool.
The TMSC is generally held in October with teams usually having up until about a week before the event to fill out an online entry form.
The model solar challenge was thus formed with many of the concepts and problems faced by those competing in the World Solar Challenge being preserved.
Exact dates for the TMSC will vary from year to year but the event is typically held around mid to late October.
The advanced division is aimed at older secondary students and doesn't have cost limits on components such as motors and other materials. Filling out an online entry form also means that teams are submitted to the TMSC's entry database and can then be contacted in cases where the event needs to be postponed due to inclement weather. AN ALTERNATIVE IS THE APC 16X16 IF YOU CAN FINE TUNE THE VOLTAGE (RPM) AND CURRENT TO OPTIMUM, BUT THERE WILL BE LOSSES DUE TO FLEXING AND POSSIBLE FAILURE WITHOUT CONTROLLED ACCELERATION IN THE DRAG PORTION.
In many cases better alternatives may exist including such things as sails, oars, paddles, wind generators, batteries recharged off the grid, renewable carbon fuels, and non-renewable fossil fuels. As a way of integrating into the curriculum concepts of hydrodynamics, solar cell and motor efficiency, propeller pitch, renewable energy (and of course team-work and co-operation), I thought the boats were fantastic.
Top teams in the boat and AIMSCC car events are then selected to represent the state at the national finals. All teachers and students need is the motivation to build a model solar powered car or boat. I ran troll motors overvolted with series-parallel switches for years without damage or need for a controller. IF YOU CAN FIND A METAL CRAFTSMAN WITH WELDING SKILL, RICK HAS A DETAILED PROCEDURE FOR MAKING THE BEST PROPS. With this in mind I have created a survey asking about certain aspects of boat design (see below). The first step should be reducing the energy needs to begin with by not building boats bigger or faster or heavier than they need to be, and by minimizing non-propulsive energy use as well.
I think a lot of solar design projects are well intended but not the ones that focus too much on speed. Except flat bottom boats the centered position will be a bit better, because the VCG is lower than in the two row case at the chines. The fast bullet trains have good enough trade off speed and better efficiency per passenger compared to personal vehicles and airline but have never caught on in the USA.

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