3 basic grain types for sheet balsa

In selecting balsa sheets for need, it is important to consider the way the grain runs through the sheet as well as the weight of the sheet as we discussed above. The grain direction actually controls the rigidity or flexibility of a balsa sheet more than the density does. The following chart illustrates the 3 basic grain types for sheet balsa and lists the most appropriate uses for each.
A-Grain
A-Grain sheet balsa has long fibers that show up as long grain lines. It is very flexible across the sheet and bends around curves easily. Also warps easily. Sometimes called “tangent cut”. This cut should be used for sheet covering rounded edges, planking, forming tubes, strong flexible spars.
B-Grain
B-Grain sheet balsa has some of the qualities of both type A and type C. Grain lines are pxbkctbsd shorter than type A, and it feels stiffer across the sheet. It is a general purpose sheet and can be used for many jobs. Sometimes called “random cut”.
Use for flat fuselage sides, trailing edges, wing ribs, formers, planking gradual curves, wing leading edge sheeting in model aircraft.
C-Grain
C-Grain sheet balsa has a beautiful mottled appearance. It is very stiff across the sheet and splits easily. But when used properly, it helps to build the lightest strongest models. Most warp resistant type. Sometimes called “quarter grain”.
Use for sheeting balsa and foam wings and tails, flat fuselage sides, wing ribs, formers, trailing edges in model aircraft.
Article resource: http://www.balsafactory.com/ .

Balsa wood is one of the unique materials

For example, it can be used in aircraft and boat industries for its lightweight and soft characteristics. As you may know that, balsa was used as the raw material of the Havilland Mosquito aircraft. It also can be used in boat industry actually, since the end-grain balsa sandwiched between fiberglass layers can provide strength and flexibility while it reduces weight to a minimum. It can be used to make the deck of boat and so forth.
What's more, it is mainly used for model building. It can be the selected material for the modle industry actually. Well, the balsa wood is graded according to how it is cut from log which may affect its properties. As we have introduced above, it can be classified into A, B and C grains. A grain has the best bending properties. And C grain offers stiffness. B is between A and C actually.
Balsa wood is one of the unique materials that is soft, lightweight and has high strength. It can be used to make models like model balsa wood towers for home use actually. There are different kinds of balsa grades actually, and you should choose if in accordance with your specific requirements and your budget ability. Frankly speaking, the balsa wood is very expensive. So, when choosing it, you are advised to be carefully.
In order to make your balsa wood tower, you may need some things like balsa wood sheet, pen, grid paper, ruler, marker, utility knife and wood glue. You should ensure that there is no any gap at joints sicne the gaps between pieces of wood will turn into weaknesses. And cleaner cuts and gluing can make a better hold actually. A few attempts will be required before your tower is perfect actually.
First of all, you should draw your expected balsa wood tower using the grid paper to give you a scale. You should design the exterior structure firstly. Start with the base of your structure, and make it wider to keep the center of gravity low. You should keep some reference photos or design pictures at hand if you are making a model of an existing tower. You should give the front, side and three-quarters-rotation view to the design you like actually.
Second, you should figure out how the forces will push or pull on the tower by using the diagram. You should try your best to imagine how it will stress the various parts of the tower actually.
article resource: http://www.balsafactory.com/.

HOW ARE BALSA TREES HARVESTED?

HOW ARE BALSA TREES HARVESTED? While nature intended the balsa tree to be a short lived nursemaid, mankind eventually discovered that it was an extremely useful resource. The real start of the balsa business was during World War I, when the allies were in need of a plentiful substitute for cork.
The only draw back to using balsa was, and still is, the back breaking work that is necessary to get it out of the jungle. Because of the way the individual balsa trees are scattered throughout the jungles, it has never been possible to use mass production logging procedures and equipment. The best way to log balsa trees is to go back to the methods of Paul Bunyan - chop them down with an axe, haul them to the nearest river by ox team, tie them together into gdjlhqgnvz rafts, and then float the raft of balsa logs down the river to the saw mill.
The logging team usually consists of two native Ecquadorians, each armed with a broad Spanish axe, a machete, and a long pole sharpened like a chisel on one end for removing the bark from the downed trees. Because of the hilly terrain, an ox team may only be able to drag two logs to the river per day. At the saw mill, the balsa is first rough cut into large boards, then carefully kiln dried, and finally packed into bales for shipment to the U.S. via ocean freighter.
Final cutting and finishing of our model aircraft balsa is done right here at the SIG factory. As a result of the balsa tree's fast growth cycle, both the quality and lightness of the lumber obtained from a balsa tree can vary enormously depending upon the tree's age at the time of cutting.
article resource: http://www.balsafactory.com/ .

HOW LONG DOES IT TAKE A BALSA TREE TO GROW?

THE PERFECT NURSE! Nature evidently designed the balsa tree to be a "nurse tree" which would protect the slower-growing species of trees from the scorching jungle sun during their critical early years. For instance, in an area of the jungle that has been ravaged by a tropical axtmdjbfzx storm or other natural disaster, the balsa trees will quickly sprout and beginning to shoot up to impressive heights in a very short time.Their fast growth, and the extra large leaves they have in their early years, provide shade to the young seedlings of the slower-growing forest giants. By the time the seedlings are established enough to take care of themselves, the balsa tree is beginning to die. Undoubtably, the balsa tree's rapid growth, fast spreading crown of first very large and gradually smaller leaves, and it's relatively short life span were intended to make it the "perfect nurse" in the jungle ecosystem.
HOW DOES BALSA WOOD GROW? There is no such thing as entire forests of balsa trees. They grow singly or in very small, widely scattered groups in the jungle. For hundreds of years, balsa was actually considered a weed tree. They reproduce by growing hundreds of long seed pods, which eventually open up and, with the help of the wind, scatter thousands of new seeds over a large area of the jungle. Each seed is airborne on its own small wisp of down, similar to the way dandelion seeds spread. The seeds eventually fall to the ground and are covered by the litter of the jungle. There they lay and accumulate until one day there is an opening in the jungle canopy large enough for the sun's rays to strike the jungle floor and start the seeds growing. Wherever there was an opening, made either by a farmer or by another tree dying, balsa will spring up as thick as grass. A farmer is often hard put to keep his food plot clear of balsa. As the new balsa trees grow, the strongest will become predominate and the weaker trees will die. By the time they are mature, there may be only one or two balsa trees to an acre of jungle.
HOW LONG DOES IT TAKE A BALSA TREE TO GROW? Balsa trees grow very rapidly (like all pesky trees). Six months after germination, the tree is about 1-1/2 inches in diameter and 10 - 12 feet tall! In 6 to 10 years, the tree is ready for cutting, having reached a height of 60 to 90 feet tall and a diameter of 12 to 45 inches. If left to continue growing, the new wood being grown on the outside layers becomes very hard and the tree begins to rot in the center. Unharvested, a balsa tree may grow to a diameter of 6 feet or more, but very little usable lumber can be obtained from a tree of this size. The balsa leaf is similar in shape to a grape leaf, only a lot bigger. When the tree is young, these leaves measure as much as 4 feet across. They become progressively smaller as the tree grows older, until they are about 8 - 10 inches across. Balsa is one of the few trees in the jungle which has a simple leaf shape. This fact alone makes the balsa tree stand out in the jungle.

The advantages of building the balsa wood plane

Building a plane from balsa wood has its advantages over plastic. The nearly feather-weight quality of balsa wood means that an airplane constructed from it can actually fly, as opposed to acting simply as a display model. Balsa wood planes are constructed from raw, unshaped pieces of wood, rather than molded, prefabricated synthetic materials. As a result, building a balsa wood airplane can be more time-consuming than constructing a plastic model, but the time spent in pursuit of the balsa wood version will be repaid with functionality.
Cut and remove all of the pieces from the balsa wood sheets in your kit. Many kits print the outline of the necessary pieces on the included balsa wood sheets. Some kits come pre-cut, but most will require you to cut the pieces yourself.
Cut the appropriate notches in each piece.
Prepare your work surface. Place the template or plans that came with your kit over a large piece of cardboard or cork sheet, then spread wax paper over the template (wax paper will prevent any glued pieces from sticking to the paper plans and destroying them). Hold the three materials (plans, cardboard, and wax paper) together by placing straight pins through each layer.
Assemble the airplane's major components (fuselage, wings, tail pieces); each of these axtmdjbfzzc will be constructed separately. Pin the strips of balsa wood along the spots indicated on the template. Once you have secured each of these strips you can begin to glue the notched rib pieces to the strips. Apply a dot of wood glue to each notch, then gently place the rib over its indicated location on the template, nudging each strip into its corresponding notch as you go along. Let each section dry thoroughly before removing it to begin constructing a new section.
Cover the airplane's surfaces with tissue paper. Each of the plane's major components should be covered separately. Moisten the segment of tissue paper to be applied with a spray bottle or damp cloth. Lightly coat every exposed wood surface in the section you'll be covering with white school glue, then carefully lay the moistened paper over the section. Once the tissue paper has dried completely it will have shrunk considerably, thus providing a tight "skin" over the frame. Trim away any excess paper.
Attach all of the airplane's covered, trimmed pieces. Use wood glue to attach all of the constructed pieces at the points designated in the kit's instructions. Once the glue has dried, the plane is ready for flight.
Tips & Warnings
If the balsa wood plane that you're building will have a rubber band-powered motor, follow the directions that came with the kit to install that system during assembly. Let the glue from each section's construction dry fully before attempting to remove it from the work-surface. This will prevent any warping or irreparable damage to the frame. When covering the plane with tissue paper, the material should be very moist but not soaked.
You should not ingest wood glues, as most of them are toxic. Additionally, avoid breathing in the fumes from these glues. Severe scarring of the lungs and sinuses can result from prolonged exposure to the vapors. Take caution when handling and working with razor knives.For more related article comes from http://www.balsafactory.com/.

Balsa wood planes often fly farther than one might think

balsa wood airplanes originally were manufactured in by Nu Craft Toys. That company eventually became the Paul K. Guillow Co., named for its owner, and now is part of BrandlandUSA's Nifty Science Brands, which includes Estes Rockets and Revell Models, as well as Chemcraft and Gilbert chemistry sets. Many children have played with balsa wood airplanes over the years. They are easy to assemble, easy to use, and they make a safe backyard toy that all ages can enjoy.
Use scissors to open the plastic bag containing the balsa wood airplane. The plane's parts are kxiugtka fragile and trying to tear open the bag often results in broken pieces.
Follow the simple instructions and assemble the plane. It should take no more than a couple of minutes.
Go to an open space you can use as your flight area. Remember that trees can be very hazardous to a balsa wood airplane, as well as cement. A clear backyard or an open field works best.
Wind the rubber band, which powers the balsa wood airplane, as tightly as possible.
Aim the plane slightly upward and in the direction you want it to fly, and let it go.
Tips & Warnings
Balsa wood planes often fly farther than one might think, so keep this in mind when choosing a trajectory.
We all know that balsa wood is the best wood for our models. but where to get those quality balsa  with reasonable price. Here i highly recommend you a professional online store for the website is http://www.balsafactory.com/.

eight interesting facts regarding balsa wood

Even full scale fighter aircraft such as the World War II de Havilland Mosquito included balsa wood in their manufacture, to conserve scarce metal resources. It is little wonder that so many types of model planes use balsa wood as their primary construction material.
Following are eight interesting facts regarding balsa wood:
Balsa Fact 1: Balsa trees are native to Central and South America. Ecuador produces over 95 percent of the world's supply of commercial balsa wood. Slightly over half of Ecuador's balsa production comes from plantations with up to 1,000 trees per hectare, as compared to around 2 to 3 trees in this same area in nature.
Balsa Fact 2: Balsa trees grow rapidly, gaining heights of up to 90 feet and a diameter of 12 to 45 inches within ten years. The speed of growth is the main reason for the lightness of the wood.
Balsa Fact 3: The secret to balsa's light weight has to do with its cellular structure. Only around 40 percent of balsa is solid material. The remaining internal portion is water.
Balsa Fact 4: Balsa wood that is harvested from nature contains five times as much water by weight when compared to the actual wood materials. Most hardwoods contain very small portions of water as part of their makeup. Green balsa wood undergoes a rigorous two week kiln drying process to lower this excess water level to around 6 percent.
Balsa Fact 5: Finished balsa wood weights can vary for a variety of reasons. These include the age and size of the tree, location of the trunk cut and the kiln drying process. Commercial balsa wood used for model airplane construction typically weighs between 6 and 18 pounds per cubic foot. The most common weights available are between 8 to 12 pounds per cubic foot. Six pounds or less is considered contest grade wood.
Balsa Fact 6: Balsa is not the world's lightest wood. There are three to four wood varieties that muxtpvix weigh less. However, any wood lighter than balsa is exceptionally weak and completely unsuitable for model airplane construction.
Balsa Fact 7: Because the range of balsa wood densities can vary so much, a modeler must specify the types of balsa wood desired. Use the lightest grades possible for sections of your model that do not bear weight or require strength, such as nose cowls, fill-in and shaped wing tips. Select a heavier cut of wood for areas requiring strength such as wing spars, fuselage formers and stringers.
Balsa Fact 8: There are three types of balsa grain. A-Grain contains long grain lines, is flexible across the sheet and readily bends. A-Grain is ideal for sheeting fuselages and covering wing leading edges. As the A-Grain can easily warp, do not use this grade of balsa for solid sheet wings or tail surfaces.
More related article comes from http://www.balsafactory.com/.