03 Feb. 2007|
Wooden raft building,restoration hardware trestle table diy,plans for cedar window boxes,different kinds of tools and equipment in woodworking - How to DIY
Coming up with a good raft design first starts with thinking about what and how your home made raft will be used. The frame or structure that creates the platform and holds the floatation together on most rafts is typically constructed from wood.
Home made rafts that float on Styrofoam have been built and the results can depend greatly on the type of material that is used. The frame of a raft can be constructed from just about anything from wood to metal or even plastic. Rafts that move in the river typically only need to be moved from one shore to the other so that obstacles can be avoided. Typically found on larger rafts sweeps are used to position at raft from left to right in a river and they are very efficient at doing so. If you want to fulfill that Huckleberry Finn fantasy adventure of camping on a log raft, here is a good way to build a simple log raft.
That said, if the crosspieces appear to be too loose in the notch grooves, wedge with pieces of wood taken from a dead log. The raft will probably be really heavy so you should build it on logs horizontal with the beach so you can easily roll it out to the ocean.
Note: If you want to have more stability, stay higher above water and carry more things, build a pontoon raft, which is like a catamaran!
Building a fire not only keeps you warm, but it will help to signal any rescue planes that are flying overhead. The last thing you want is to find out that your raft needs repair after you have already left the island.
What a raft is build from is typically determined by the materials that are locally available or easy to get. Normally any structure that is used for shelter is also made from a wood frame and can have a tarp or even a metal roof. A raft that is going in the river that is not being raced actually fairs better when there is more drag on the structure below the water.
Rigged up either to be used by hand or more like an oar on a row boat paddles will give the raft the ability to be controlled. For example the Yukon river feeds into Lake La Barge which is 50 kilometers long and fortunately most of the time the north blowing wind will help push a raft through the lake so that it may continue on it's Yukon River raft trip.
It must be dead because dead, dry wood swells on contact with water and creates the necessary tight seal.
Light poles can be added on top of the raft to form a deck that will keep you and your traveling companions, plus gear, drier. Materials that rafts have been made from include logs, 55 gallon drums, tractor trailer inner tubes, Styrofoam, sealed boxes, used bottles or cans and just about anything else that floats.
The drawbacks of a PVC raft include the cost of the PVC and fitting, the weight of the PVC and the concern about leaking into the tube that would then weight the raft down.
Blocks of Styrofoam may be hard to attach to the frame with unless they are in something and it may be hard to acquire enough Styrofoam to make a larger Styrofoam raft. So if you are designing a raft for river travel you don't need to or even want to worry about drag or aerodynamics. These are great for very large payloads but because you can't paddle backwards there are no brakes for the raft. Putting a motor on a raft will make the registration process harder but you will have more control as you enjoy your travels. However if you are designing a raft that will float in a lake or if you are in a race on the river and expect to be propelling the raft quicker then the water moves then the less drag the better. Care should be taken when considering adding a sail to a raft as it may make the boat registration process more difficult in some states.