Our wooden masts and spars are made with the same uncompromising quality and attention to detail as our oars and paddles. We have made hundreds of masts and spars for boats as small as nutshell prams, for many Herreshoff designs, and numerous larger boats like Concordia yawls. Due to our shop size, 80 feet is our maximum length. We offer solid and hollow masts in a variety of cross-sections Wooden spars are still being used in light aircraft such as the Robin DR400 and its relatives. A disadvantage of the wooden spar is the deteriorating effect that atmospheric conditions, both dry and wet, and biological threats such as wood-boring insect infestation and fungal attack can have on the component; consequently regular inspections. J-3 Wood Spars, FAA/PMA'd; J-3 Wing Root Fairings; Jury Struts, Clamps, Tie Down Assemblies; Metal Rib Wing Repair Kit; Replacement Wing Parts; Ribs. J-3 Ribs with Wood Spar Wings; J-3 Ribs with Metal Spar Wings; Strut Rebuild Kits; Trailing Edges; Wing Strut Forks, Barrels; Windows, Windshields. Landing Light Lenses; Skylights; Windows; Window. Wooden Mast and Spar Building. A mast or spar made from wood not only looks and feels good but it also takes advantage of the naturally ability that trees have developed over the centuries for creating a tall, strong, flexible pole
Laminated spar technology is not a new phenomenon; it was routine in the Golden Age of wooden aircraft design in the 1930's and 40's. The process requires more labor than solid spars, but since thinner sections are used, any defects such as knots or pitch pockets are much easier to find The Spar Shop at the Historical Seaport custom-builds wooden masts, yards, booms, and gaffs for sailing ships and modern large sailboats, as well as flag poles, interior and exterior single-log wood columns for premium homes, and custom-turned poles for special projects Wooden poles are the main ingredient in building a pioneering structure. Everyone knows what a pole is. Depending on the project at hand, we use them in all different lengths and diameters. But, what are all these references to spars? Is a spar different than a pole? What is a spar? Simply stated, in pioneering, a spar is a thick, strong pole Wooden spars can be spliced according to procedures found in AC 43-13. Basically, a spar may be spliced at any point except under wing attachment fittings, strut fittings, etc. The fittings themselves must not overlap any part of a spar splice. Again, splicing a spar should only be undertaken with the help of someone who has experience with the. Wood wing spars are fabricated in various designs. Recommended method to repair either a solid or laminated rectangle spar; The use of a scarf joint to repair a spar or any other component of an aircraft; Wood wing spars repair procedure; A longitudinal crack in a solid spar may be repaired. Doublers extend the minimum distance beyond the crack
Getting back on the subject of Wood Spars. I too am looking to purchase a Decathlon which is subject to the same wood spar AD as the Citabria. A friend advised that I only look at planes that have had the wood spar replaced with the aluminum spar or buy a newer 90's Decathlon that came from the factory with the AL spar Flaherty is a spar builder in the employ of Jim Thompson, who runs a marine carpentry business at Newport Shipyard. It's a glued version of a tree trunk. This mast is made from Douglas fir and started out as a long octagon that was shaped by gluing eight staves together with bird's mouth joints, then whittled to a round shape
Wooden spars/ribs/everything are patched and repaired all the time, but it's best to get some experienced eyes and hands on it. If there's a local EAA chapter or place that works on older airplanes or restores airplanes, those will likely be good places to start to find somebody Aircraft wood spar splic The spar varnish name is related to the wooden poles on a marine vessel that offer support to the sails, the ship's spars. This part of the vessel gets maximum exposure to wind, sun and moisture, so the wood needs an exceptionally high protection level
Wooden Spars. The Beetle Boat Shop has a long history of spar building dating back to the whaling days when they built the spars for the Beetle whaleboats, and also the whaling ships, most notably the Charles W. Morgan. That tradition continues, as the Beetle Cat spars are all built in-house using 4x4 Douglas Fir, carefully sourced and brought. Wooden spars (PAINT-PREP)should also be finish-sanded to a medium-fine grit, such as a 220. You can then use wood bleach or oxalic acid to brighten and clean the wood if applying a clear finish. Be sure to rinse the this acid with vinegar to neutralize it and remove any residue that may conflict with the finish adhering properly 1. TotalBoat Gleam Marine Spar Varnish. It is arguably the best varnish for wood that you can shop for, especially if you are a sailor. This formula is a certified marine grade varnish with UV inhibitors, phenolic resins as well as Tung oil. It gives your wooden surfaces an impressive, bright color finish So, 15K to rebuild and cover my wood spar wings, or 30K for ACA metal wing and a piece of paper saying a full tank and passenger won't kill me. B. Bob Turner Well-known member. Joined Apr 4, 2018 Messages 1,400. Aug 2, 2020 #7 There is a fine line between obeying regulations and getting really down in the weeds with them. Just carry enough.
Spar Varnish Wood Finish. Rust-Oleum Spar Varnish is a marine grade clear finish that is great for exterior applications where the finish will be exposed to water. First, not all finishes were made to be in contact with water. But Spar varnish is one of the exceptions and was made for contact with water You may repair wooden wing spars as you have been told in this group. You have not said what type of spar (solid wood, laminated or box type) is being repaired and whether or not it is in an experimental or certified aircraft. Repair of a wing spar is considered a major airframe repair and requires a form 337 be filed The term spar varnish comes from the boating world, where the long wooden poles that support the sails are known as spars. A spar varnish is a finish specifically designed withstand the rigorous conditions of seafaring life, which means it can also handle anything your backyard throws at it Wood does not fatigue, it yields. But unlike metal, it attracts fungi and rots. A consistently hangared wooden spar'd airplane should be fine if it is regularly inspected and properly designed like the Aeronca and Bellanca airplanes. We flew two Aeroncas that were over 20 years old and both had wooden spars, one built in '42 and one in '46
Varathane 1 Gal. Clear Satin Oil-Based Exterior Spar Urethane Model# 9331 $ 42 98 $ 42 98. Schedule delivery. Set your store to see local availability Compare. Copper-Green 1 gal. Wood Preservative WaterGuard for Wood Waterproofing Clear Sealant offers convenience WaterGuard for Wood Waterproofing Clear Sealant offers convenience and value. Wood is only half as strong in compression as it is in tension so the spar must handle the compression forces at work on the top side. When the time comes to re-cover the wood wings of an aerobatic aircraft, the spars often reveal compression failures The wood removed from the shear web area will bring the weight of the spar down. The wood be ing stronger will likely provide equal strength (stiffness). So if you are building a traditional Cub/Taylorcraft style wing with solid wood planks for spars, you have a fairly easy task. The previously flat ends of the wooden or metal wib sections. Aug 3, 2013 - This is a typical logging setup - spar tree is in the center. . Wood Lumber. This is a typical logging setup - spar tree is in the center. Saved by Kristen Enumclaw. 26. Wood Lumber Logging Equipment Location Scout Wood Lumber. This is a typical logging setup - spar tree is in the center Just epoxy the scarf joint, then shape the blank to your design. This is the same spar stock we use in our boat kits. Blanks are planed on four sides to the maximum dimensions needed for the design specified, ready for final shaping. Due to ground shipping restrictions, the maximum spar length is 90. Use the pull-down to select the spar design.
Editorial Input from 2006; The wooden spars of the original airplanes were fine until the 1990's, when a serious cracking problem developed. These generally are horizontal cracks running out from under the plywood doublers right where the wing struts come into the spars. It's important any airplane be inspected thoroughly for this problem Minwax® Helmsman® Spar Urethane is specially formulated as a protective clear finish for exterior or interior wood exposed to sunlight, water, or temperature changes. Contains UV blockers to reduce the sun's graying and fading effects. Forms a protective barrier against rain and moisture Rust-Oleum Marine Spar Varnish deserves mention as the best exterior polyurethane product due to its reputation as a reliable product. It's a formula that gives your outer wooden structures sufficient protection against damaging elements such as sunlight, water, as well as chemicals on wood surfaces above the waterline Wood spar Airworthiness Directive. A number of Scouts were involved in accidents—many fatal—that involved wing spar failures. More than a few of these accidents involved aerobatics, maneuvers that the aircraft was neither designed nor approved for. The Scout suffered, in this respect, from a close resemblance to the Citabria line of. I make signs out of wood and last Spring (2008), I purchased a gallon of Helmsman Spar Urathane since I go through quite a bit of it (and absolutely love it). I had used a little more than a 1/4 of the gallon then stored it for the summer in the basement
Pleasant Bay Boat and Spar Company continues the long standing tradition of building all types of beautiful hand crafted wooden spars and wooden flagpoles from traditional un-stayed gaff rigs to performance box construction masts and booms, as well as flagpoles built to the same high standards as our spars With twice the durability as conventional wood finishes, it is the perfect top coat for your marine projects. From the Manufacturer. Rust-Oleum Marine Spar Varnish adds a warm golden glow to enhance wood's natural beauty. It is recommended for exterior wood above the water line Laminated wood spars may be substituted for solid rectangle wood spars. Glue. The strength of a well designed and properly prepared wood splice joint is provided by the. AC 43.13-1B. Where is information found concerning acceptable species substitution for wood materials used in aircraft repair The spar finishes you buy at home centers and ordinary paint stores generally either don't contain the absorbers or contain too little to be effective against sunlight. To find exterior clear finishes that contain an adequate amount of the UV-resistant additives, you usually have to go to a marina in a coastal area, or find one of these.
In business since 1990, Elk Spar & Boat Shop specializes in both new wooden mast and spar construction, and boat restorations. ESBS is experienced in all types of wooden boat construction and has completed repairs and restorations ranging from heavy double sawn frame schooners to exquisite yachts. We would love to talk to you about your project Wooden Mast and Spar building. February 2021. Wooden Mast and Spar building for your wooden boat, comparing solid wood spars with hollow spar making techniques. Article by Steve Fromholtz. 119. Canoe Boat Building Plans Sparring Boat Building How To Plan Sailing Wooden Small Boats Boat Bondo Rotted Wood Restorer, Penetrates into Spongy, Dry-rotted Wood Fibers Creating a Solid Surface, 8 Fl oz 4.5 out of 5 stars 494 $16.15 $ 16 . 15 $26.99 $26.9 A friend I replaced my 7ac conv.wood spars w/millman spars, I also added new safe air 13 gal tanks,new leading edges,trailing edges,and about 6 or so new ribs,and with fabric and paint and rigging had about 7500.00 in the planeless than half for new champion wings and no more ad--well worth it and millman co. great to deal with even custom drilled for new tank installation.. the way to go in.
. What is the statement about wood decay would be correct? Decay is not acceptable in any form or amount. The strength of a well-designed and properly prepared wood splice joint is provided by the what Spar varnishes are typically designed to not only protect the wood, but also give it the flexibility and UV protection it needs to last for years. And the name spar varnish comes from the boating world, where the long wooden poles that support the sails are know as spars Making a Boom / Gaff Spar Introduction. This section covers the making of a boom or gaff spar for a Fowey 14' river sailing dinghy. It uses a different technique than other solid wooden spars (see 'Making a Wooden Spar'); in this example the spar is made in two halves to enable a boltrope channel to be machined into it
The primary use for this wood will be wing spars, but Ron will also use it for window frames and stringers and stuff like that, but the primary aim is spars. Spars require a piece of wood about 16 feet long. It's fairly easy to find a good board that's eight feet long, but getting a good board that's 16 feet long is much harder Read the plans carefully. The spar material is specified as douglas fir not sitka spruce. If you buy spars from Wicks or Aircraft Spruce, it will be sitka spruce not douglas fir. The Model 12 must have DOUGLAS FIR SPARS. While most wood wing airplanes were designed for Sitka Spruce spars, the Model 12 was not The wood is from the spar of a 1946 Aeronca Champ aircraft. The spar was replaced due to an incident which damaged the wing. It is Sitka Spruce which comes from the west coast of the US. Likely cut during the war, when totally irresponsible cutting took place because of urgency. A spar today costs almost a thousand dollars due to limited supply. Varnishing Basics. The following tips on how to varnish wood apply to both boats and other wooden items. The art of varnishing wood goes a long way back in history, and although there have been many modern attempts to make it easier to create the ultimate in bright-work (and to reduce the amount of time that is required), these basic concepts can be applied to all of your paint and varnish.
. This was definitely a case of measure twice and cut once, but both pieces came out okay. Another piece of spruce forms the aileron spar ac 43.13-1b 9/8/98 contents (continued) paragraph page page vi chapter 3. fiberglass and plastics section 1. repair of light load laminate structure Q: I built an outdoor swing out of all-new oak wood. I finished it with spar urethane, and it all peeled off. What would be the best finish for outside? A: Spar urethane was the right thing to use, though spar varnish would also have worked. The fact that your spar urethane all peeled off almost certainly had nothing to do with what finish you chose, but everything to do with how you applied it Here, two or more wood shapes are glued and nailed together to obtain a strong cross-section and length of the finished spar needed in building structures using ropes and spars. This method of gluing and nailing pieces of wood together has long been used by wood workers to gain the strength that a single piece of wood does not provide
West Marine is committed to outfitting your life on the water. With over 250 store locations, 100,000 products in stock, and knowledgeable Associates, trust West Marine for your boating, sailing, fishing, or paddling needs. Shop with confidence - get free shipping to home or stores + price match guarantee At the time, this wooden glider was in use a lot in France, and some old spars were breaking up. Avions Mudry's solution repaired and saved 250 gliders with a glass fiber repair procedure. For the Cap 10, it meant they put carbon reinforcement strips over the whole length of the spar, on top and at the bottom Varathane® Diamond Spar Urethane provides the ultimate protection for your outdoor wood projects in an easy-to-use, water-based formula. It has been specifically formulated to provide the best protection from UV light and weather, both of which can take years off the life of your outdoor wood. When it comes to polyurethanes, one formula does not fit all projects. Only Varathane® offers.
The wings consist of a modified Clark Y airfoil and are given a 2 1/2 deg. angle of attack and a 1 1/2″ deg. dihedral setting. Ailerons are operated by a pair of push/pull tubes and torque tubes running in phenolic bearings. Leading edges of the wings are covered with 1/16″ plywood and spars consist of two caps and plywood webs TotalBoat Wood Sealer can seal in the color of stained wood without muddling, just be sure the stained surface is completely dry before applying sealer, and do a small test first to ensure compatibility. Does this varnish primer dry clear, or is it a stain? Wood Sealer is not a wood stain, and will dry to a clear, glossy finish Traditionally the Champion line of aircraft used wooden wing spars nailed to aluminum ribs as the primary wing structure. With the redesign of metal spar wings, certain engineering aspects could be taken into account to improve performance and reliability
Unlike the wood spar wing, the leading edge wraps all the way around the the leading edge from the top of the spar to the bottom of the spar. It is attached along the span to the ribs and to the spar through attach angles (affectionately known as Z-brackets). This arrangement differs from the wood spar wing in two ways They are used on wooden spars and are not intended for use where they will be walked on or otherwise subject to wear. They are not used on decks, for example. What you want is an exterior marine varnish. This product is designed for exterior use and is quite a bit harder. It will stand up to much more abrasion FLOORS BY SPAR, BEST BY FAR! We are a proud 3rd generation family business serving the Hudson Valley since 1961. Learn More. Hardwood & Plank. From half inch solid walnut to luxury vinyl plank and engineered hardwoods, we offer the full range of best value, durable floors for any floor of your home or business. Invest in a name you can trust
Crystal clear or amber tone: Many clear finishes add a rich, warm, amber tone to the wood. Others remain crystal clear. You can choose whichever look you prefer for your project. However, if your project is a light color—whether stained or unfinished wood—it is best to protect it with a finish that remains crystal clear Compression cracked test spar specimens may not represent wood spars where compression cracks occur randomly along the spar length. The only assurance that the specimen was in a Pass condition was if the specimen's compression crack was identical to that of a failed spar To waterproof wood that will be placed outdoors, choose marine varnish, which contains UV absorbers to resist sun damage. For interior use on end tables and coffee tables, spar varnish is a good.
Spar urethane, on the other hand, is commonly used on wood that is commonly exposed to the light, heat and sun. This is also a common finishing used for things that are submerged in water like boats because of its resistance to water To protect varnished wood, apply a coat of paste wax. You don't need to do this very often. While applying wax helps protect from moisture and dust, never do this more than once a year to prevent wax buildup. If there is wax buildup, remove it with a cloth dampened with mineral spirits or synthetic turpentine
Polyurethane finish features a few downsides because it cures, sets and rises more slowly than spar urethane that could dry in a matter of minutes. Both finish types come with a spray application. However, brushing spar urethane is a hardworking job because it tends to harden faster, and will produce as result visible brush line Mccloskey Voc Man O'war Sparmarine Spar Varnish: This gives the ultimate protection to both interior and exterior woods therefore remains flexible and absorbs the expanding and contracting seasonal movement of wood. It is ideal for wood doors, trims, window sills, outdoor furniture and craft, railings and wooden boat. Where to use Some professionals add extra solvent to the first few coats of spar varnish they are applying over wood. This makes the varnish thinner and helps it soak into the wood better, thus giving (in theory) better adhesion for the entire system of multiple coats of varnish (some folks will apply 8-12 coats of varnish rather than a simple 2 or 3) Marine Spar Varnish can be sprayed with proper precautions and techniques. Refer to the System Three Clear Finishing of Outdoor Wood for detailed information on the application. Available in Gloss or Satin finish. A high solids, VOC compliant finish. Designed for marine and exterior wood surfaces. Offers excellent protection from salt air and.