Archive for February, 2010
How to build an archimedes boat?
Author: admin
Each team will construct, on site, a boat using only a 300 mm by 300 mm piece of Aluminum Foil. We will provide the foil and the pennies. Your goal is to make a boat that will carry the most washers. The boat must float unloaded for at least 77 seconds to count as a boat. Your team will have a limited amount of time to build, float and load your boat.
~can anyone please give me tips on how to win the contest?~~
thanks
wikipedia.org
"On Floating Bodies (2 volumes)
In the first part of this scroll, Archimedes spells out the law of equilibrium of fluids, and proves that water will adopt a spherical form around a center of gravity. This was probably an attempt at explaining the observation made by Greek astronomers that the Earth is round. Note that his fluids are not self-gravitating: he assumes the existence of a point towards which all things fall and derives the spherical shape. One is led to wonder what he would have done had he struck upon the idea of universal gravitation.
In the second part, a veritable tour-de-force, he calculates the equilibrium positions of sections of paraboloids. This was probably an idealization of the shapes of ships’ hulls. Some of his sections float with the base under water and the summit above water, which is reminiscent of the way icebergs float, although Archimedes probably was not thinking of this application. "
OK – I thought that this might be easy to research, however, your teachers have come up with a good one as it does not seem that you can use a direct search to find much. So, now we try some other ideas:
* my gut feel is that you should turn up the edges of the foil to create a pan type struture (think of your mothers deep pans with 3" to 4" side – roll the edges for strength and bold the corners in). This would be a version of a flat boat. You should practice to ensure that it works.
* also, why not try to contact some actual boat engineers! – try searching under "aluminum boats" and see if you can sent them emails to try to talk to an actual boat engineer.
* I would also suggest trying to contact makers of aluminum foils to see if any of their engineers could give you any ideas.
* Since this type of contest is run at other locations, you might also try tracking down some of the past winners to see what they learned and what their secrets were.
* then try looking for foil boat !!!
http://juniorengineering.usu.edu/workshops/buoyancy/boats.html
http://www.new-sng.com/foilboat.cfm
http://www.sciencenetlinks.com/Lessons.cfm?DocID=143
http://pbskids.org/zoom/activities/sci/boatsafloat.html
http://www.newton.dep.anl.gov/askasci/phy00/phy00291.htm
http://www.nps.gov/archive/miss/programs/brj/brjactivities/aluboat.html
http://education.jlab.org/beamsactivity/6thgrade/designandengineering/designandengineering.pdf
http://www.sciencenetlinks.com/lessons.cfm?BenchmarkID=3&DocID=143
http://www.lessonplanspage.com/ScienceWillTheBoatSinkOrFloat4.htm
http://www.monroe2boces.org/programs.cfm?subpage=955
http://www.nps.gov/archive/miss/programs/brj/brjpdfs/aluboat.pdf
http://users.marshall.edu/~bady/rsi/4th/4bouyancy.html
http://www97.intel.com/en/ProjectDesign/UnitPlanIndex/FloatThatBoat/
* Ah Ha – and the secret is (as I suspected):
http://www.nps.gov/miss/forteachers/brjralumboat.htm
Note to teacher:
Give students the opportunity to be as creative as possible with the hull shape. Make no suggestions, unless to show how to fold up one side to make an edge. The best designs are flat barges with small sides. The placement of pennies also makes a difference in the number held. The record for one sheet of 8" x 12" foil is around 280 pennies. Recycle the foil along with your pop cans.
Science Museum of Minnesota, 2001.
OK, now that you know how to win the contest, I would still recommend contacting the engineers at the boat companies and the aluminum foil companies and be ready to talk about what you learn as you win the contest. You will impress the judges so much with your knolwedge and skill of floating all those pennies that they will have to give you the prize.
Good Luck.
read comments (1)
I thought maybe a pirate ship type of sail… not sure
my boat has to catch the wind to go across a pond in less than 3 minutes.
There is a lot of factors that go into what is the best sail layout.
If you are sailing straight downwind a square rigged ship does great.
A gaff riged boat is also good downwind.
A bermuda rig can be easier to handle and can point upwind better.
A gaff rigged boat will have a lower center of effort than a bermuda rig.
Chad
Might look into boat donation charities.
They get them free & sell or auction them off.
Some marinas may have abandoned boats they would love to have removed, esp wooden boats.
"Project" boats can be money pits, but if you find an older classic to restore, could be fun.
Best regards.
I plan on buying a large boat (65ft) for personal use, if I choose to start a commercial use of it, (i.e. charging for fishing or touring on Lake Huron), what requirements are there for me or the boat. I do not have a captains license, do I need one? If so, how do I obtain one?
If you operate a boat with passengers for hire you will need a Captains License. 6 passengers or less you can get a "6 pack " license and would be an operator of uninspected vessel. 7 or more and your vessel would need to be inspected and you would again need a license. To get a license you will need verifiable time underway and would have to sit for a test. Contact the USCG about the license requirements. There are prep schools that give courses for the test.
I’m building a 1/35 scale diorama of a navy Patrol Boat River.How do i make the water effect of a river.?
brown flat paint . This is the color of the water in vietnam rivers. The bow wave and wake are made with cotton.
How to Build a Boat: The Landing School In Maine
Author: admin
Gary Jobson, renowned sailor/broadcaster, interviews Barry Acker, president of The Landing School, in Maine about how his students become boatbuilders.
Duration : 0:3:44
Advanced Boat Design Software Tools
Author: admin
Looking for a project that is rewarding and challenging? Building a boat may be just the thing. The 3d boat design software at http://www.3dboatdesignsoftware.com will make it much easier for you. Software like this is very easy to use even though it is very powerful.
Duration : 0:0:50
1982 Pantara Jet boat restoration project
Author: admin
Here is a restoration project I bought from a friend and is soon to be listed on ebay….1983 pantara 18 foot jet boat, chevy 454 30 over, new brass pump, shift cables etc. Sorry the end of the video is messed up its my first microsoft movie maker attempt…
Duration : 0:9:33
GT Pro Powerboat Racing, June 2007
Author: admin
An epic battle between the Dillon Mini tunnel boat, driven by Dave Halver, and the Dillon Mini Vee, driven by Bob Dillon. Detroit Lakes, MN, June 10, 2007. Boat plans available from dillon-racing.com
Duration : 0:5:7
Boat Building; Wooden International Moth Scow
Author: admin
Chris H. of New York builds an International Moth scow to the Bunyip design by R Hilton of Australia.
These hulls weighed between 21-28 kg when finished.
Music by Michael Rogers; “Sauropod Shuffle” from the complilation CD “Sound of Light”
Duration : 0:3:55