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Cardboard Boats

You want me to race across a pool in WHAT?! Let's learn about buoyancy, stability, and structural engineering to design and build a cardboard boat that can win a high-stakes cross-pool race.
Rainer O. | STEM 8

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STEM 2019-2020 Year End Reflection video Rainer O. | STEM 8

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this is the video of page of 3 different types of boat hulls

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BOATERexam.com® - Educating Boaters Online

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Leading provider of safe boater education and certification across the United States and Canada. Our online boat safety course and exam allows boaters to meet mandatory education requirements.

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20 pounds if regular cardboard 60-150 pounds for corrugated and double walled cardboard and up to 300 pounds for triple walled boxes

Rachel

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shapes of hulls

Rachel

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ryan

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The Kirksville Parks and Recreation Department will be putting on its third annual cardboard boat race April 27. At the event, sailors will show off their homemade crafts by taking to the sea - or at least, the waters of the city's indoor pool - to see whose designs can stay afloat.

The boat race will be held at noon at the Kirksville Aquatic Center. Participants will compete to see who can propel their boat through a lap in the pool the most quickly, and without sinking.

According to Assistant Parks and Recreation Director Robin Harden, the point of the event isn't so much to compete as to have fun.

"Our goal is that everyone comes out and has a great time," Harden said.

But just because the event doesn't have a competitive spirit doesn't mean you can't get competitive. With a little research, you can build a cardboard craft that's suited to keep you floating while your competition sinks. In that spirit, there are a few steps you can follow to build an impressive craft.
Choose a design
Before you begin constructing your cardboard boat, you'll need to decide what you want it to look like. Keep in mind that number of people you'll want your boat to support (the cardboard boat race allows teams of two to four people). Make sure your boat isn't too large to get it through the door of wherever you're building it, or the Aquatic Center.

Popular designs for cardboard boats include boats based on canoes, kayaks and sailboats; design templates for more elaborate boats imitating the structures of cruise ships and viking longboats can be found online. Another popular design is simply using a large, square cardboard box, by choosing something a little more elaborate, like a boat with a V-shaped hull, can help your vessel move more smoothly through the water.

When using cardboard as a construction material, a flat bottom is the best design to prevent tipping over. A wider boat is also more stable than a long, narrow one.
Collect the right materials
The only materials allowed in the construction of your boat are cardboard, duct tape, adhesive and water-based paint. Corrugated cardboard may be used, but it cannot have any wax, resin or vinyl coating. Decorations can be made of any material, but should not help the boat stay afloat or keep its structure together.

Of course, to construct your boat, you'll need large cardboard boxes or sheets of cardboard. Old appliance boxes are a great basis for your construction - ask local stores or recycling centers if you can use the boxes they have available.

Other things you'll need are tape to hold your vessel together(duct tape is sturdy, but hard to paint, while masking tape is easier to paint but less watertight) and waterproof glue (carpenter's wood glue is frequently recommended). You'll need to choose a type of paint that is water-based but also waterproof. House paint is a good choice; you can also use a sealant if you want to make sure your paint doesn't smudge. Remember to paint the inside of your boat as well as the outside to help protect the craft from splashing water.
Calculate the size of the boat
Sure, any boat can sink - just ask the passengers on the Titanic. But there is a good way to give yourself a better-than-average chance of staying afloat.

In a guide to building a sturdy cardboard boat, the website Instructables offers a formula. Sixty pounds displaces about one cubic foot of water. Start by adding up the weight of your crew, then divide by sixty. That provides the cubic feet of water you can expect your boat to displace. You'll want to choose dimensions for your boat that roughly multiply together to get that number. For example, if you can expect 15 feet of cubic water displacement, you should be able to stay afloat in a boat that's five feet long, three feet wide and one foot tall.

You can make your boat bigger than that, and it's important to make sure you can reach the water with your oars. But if it's much smaller than your calculations show it should be, you can expect your team to end up in the water.
Pay attention to detail
If you want to make sure your design is going to stay afloat, it's a good idea to try it out on a smaller scale before you construct the real thing. Construct a small version of your craft out of cardboard (for example, if you're planning a boat that's 10 feet long, build a 10-inch model), fill it with coins or rocks proportionate to the weight of your crew, and see if it floats.

If it doesn't, you should be able to identify the weaknesses in your design and head back to the drawing board.

It's also important to keep the practicalities of your design in mind while you're constructing it. Many competitors in cardboard boat regattas have been taken down by paddles or oars that were made of cardboard and not waterproofed. In Kirksville's race, you can use standard paddles or oars, but if you're making yours from cardboard, be sure to paint them as well.
Add design elements
Once you've completed your cardboard boat, it's time get creative. Decoration is a major part of any cardboard boat race, with participants showing off innovation ideas for what they can transform their cardboard boats into.

Harden said previous years' races have included whimsical designs patterned after animals or pirate ships. Other designs that have turned up in cardboard boat regattas include school buses, planes, bananas and even the Oscar Meyer Wienermobile.

Awards will be given out at the event for most original design, most innovate construction and best decoration. And if you can't win a race or a design contest, there's another award that might be perfect for you - the "Titanic Award," for the most entertaining sinking.

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5 ways to build an unsinkable cardboard boat

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The Kirksville Parks and Recreation Department will be putting on its third annual cardboard boat race April 27. At the event, sailors will show off their homemade crafts by taking to the sea - or at least, the waters of the city's indoor pool - to see whose designs can stay afloat.

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ezekiel

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Rubber band powered boat | Science Project 2022

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why speedboats are good 🤓☝Speed boats are designed for performance, offering a blend of power and agility that allows them to slice through the water at impressive speeds. Most recreational speed boats can reach speeds between 60 and 100 knots (69-115 mph). (liam)

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A heavier boat is more comfortable in any kind of chop, easier on the crew and, chances are, not much slower at cruise speeds. Top speed is nice for bragging rights, but most of the time even a fire-breathing raceboat is throttled back. We'd opt for a heavier, more comfortable boat.

-Slim Shady

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Sailing Stats: Types of Sails and What they

If you want to sail upwind or downwind, you will need to use several types of sails, which could include jib, genoa, spinnaker or gennaker. Depending on the type of sailing vessel, and the weather conditions, it may have all these sails or just one or two of them. (johnny)

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good question... but what shape is best for the sails? (Peyton's post)

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good question... but what shape is best for the sails? (Peyton's post)

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Boats float by a force called buoyancy, which works when the ship displaces more mass of water than its own weight. So if the ship weighs more than the amount of water it displaces it will sink, and if a ship displaces way too much water compared to its weight it will stay too high and sink.

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Craft Ideas For Kids - Sail Boat | World Of Art | Øistein Kristiansen

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How do big cargo ships and ferries float, even though they are so heavy? Why do boats float but stones sink? How do paddles make boats move? What’s inside those enormous container ships? We learn about the physics of floating with Fahad Mahmood, professor of physics at the University of Illinois Urbana-Champaign. If you do any of the activities we mention in the episode, send us your videos!

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I <3 tim cheese