The Model Craftsman: Volume 9, Issue 11 – April 1941

ULI 1| CUTIE ee ere rye TT strength. Brass screws are used for the ends and edges of the planks adjacent to the rabbet. Screws may be used to fasten planks to frames also, although toothpicks are just as satisfactory. Further, series of several articles on the subject by Mr. Farley, a nationally recognized authwrity.) PRELIMINARY REMARKS T HE plank-on-frame method of constructing model yachts all plank-edges coated are with adhesive, so that the entire hull, backbone, frames, and planking are a closely knit unit. Celluloid cement or Ambroid is the most convenient adhesive for use in sealing plank-edges, adhesives do and not neither of necessitate these perfect The best stock for the backbone is straight, close-grained pine or mahogany. Freedom from warping or twist will be assured if, instead of a solid piece of wood, TWO pieces are glued together with water-proof glue. Don’t use celluloid cement or similar adhesives for this kind of work. The glue-joint between the two pieces will provide a permanent center-line, and the two layers re-enforce one another and make a stronger member than a single piece of wood. is the most modern, simple, and accurate in use. The photo shows the It yacht set up on the building-board, with is employed by many builders of note and skill, and affords complete satisfaction, frames and clamps (or inwales) fitted. The rabbet has been cut. The yacht is shown right-side-up. This is not the pres- makes a light-weight, water-tight hull that won’t let go either when sailing or in “dry-dock,” and is considered by experts to be a great improvemerit on methods previously in use. As far as the writer knows, this system has never be- ent design, but will serve to show the set-up. Further pho- fore been published, but has been passed by word of mouth, for a number tos and drawings by Mr. Farley will ap- of years. Older methods, described in text-books, include using the forms (or molds) as a temporary expedient to provide a form, guide, or jig, upon which to bend the pear soon. joints or much pressure. Small cracks or imperfections are sealed and made practically invisible. If you prefer, The keel-appendage, including pattern for lead ballast, would best be of pine for easy shaping, and glued in two pieces as described above. but these generally did not provide for water-proof glue may be used, but successful use demands fairly good “faying” joints and considerable pressure. The only disadvantage in using celluloid cement or Ambroid is that it dries rap- strength. idly. tinually replaced, often, incorrectly. By careful planning, the backbone can true timbers or ribs, or for an anchor- age for battens, over or under which steamed timbers or ribs are shaped. Sawed-out frames were also described, Too much cross-grain was evident. However, by using two containers, The value of main- taining a permanent center-line is obvious, as, in cutting down and shaping, there are no pencil marks to be con- The plank-on-frame method obviates one with a fairly thick mixture, and another thinner, the operation is simplified. be kept an equal width through its entire length in most cases. The rabbet line – steaming or bending operations, ard al- Acetone added to either Ambroid or cel- though analogous to the sawed-out frame can generally be shifted to allow this. luloid method mentioned above, differs ir that the molds, or frames, are laid out in must such a manner that no difficulty rezard– dry, Backbones of most models are made in two or three pieces, according to the profile of the yacht, and very seldom is ing cross-grain is encountered. lightly together. such frames are re-enforced by floors. The plank-on-frame method provides ample frames reserve in strength their and holds the correct positions until planking is completed, after which the excess wood is cut down with knife or chisel to the molded depth, an, of course, remains a part of the hull. Round hardwood toothpicks, procurable in any five-and-ten cent store, and coated with adhesive, are used to ‘asten the planks to the frames, and in them- April, 1941 be will taken to thin use it out. TWO Care COATS. Apply one coat to each plank-edge, let and then add a second and press result in trouble. Excessive pressure will A SINGLE COAT is useless. If pressure is desired (when using water-proof glue) brad (or screw) battens, approximately 1/8 or 3/16 x 1/4”, across the frames, much as you would planking, but leaving a space of about a quarter inch or more between each. Prepare a dozen small wedges of soft wood, each two or three inches long, and place them between the batten and plankedge, pushing wedges in just enough to it advisable to use one continuous piece. A good width for backbone for any size model, from an M Class up, is one inch. This means, two one-half inch pieces of stock glued together. Accurate lining up of the whole backbone and keel-appendage, also the skeg, is simple if the width is kept equal, say one inch. When checking the assembly, it can be laid on a flat surface, fastened together with screws, turned over and re-checked, and any twist, rock, or irregularity detected and corrected. (Continued on page 65) Ww ios) Further, cement re This is the first of a ceeds. eV na By CHARLES H. FARLEY (EDITOR’S NOTE: transverse additional constitute selves PLANK-ON-FRAME CONSTRUCTION FOR MODEL YACHTS give the required pressure. Remove battens and wedges as the planking pro- wa eT EDITED BY R. P. DEZENDORF up to full size. The scope of this article will not permit full details of this and PHILLY SHOW (Continued from page 64) Three layouts representing the popular gauges were in operation during the show. All of these proved very interesting to the srowds attending, and no doubt they made several converts to the hobby. An occurrence, which may be of interest to Mr. Robert Ripley of Believe-it-or-Not fame, was the theft of a tiny race car from the exhibit of the Haines Hobby Shop, Reading, Pa. The day following the theft, the car minwas mysteriously returned by mail. The iature jalop was the property of Del Reinhold other operations, as such information will be found in books already published. If not shown on the plan, a base or (Continued from page 33) If the middle portion of the backbone requires more width than the forward and after parts, the required amount of stock may be glued on either side AFTER the assembly is lined up on a flat surface as described. Or, if it re- quires LESS width, this may be worked off after lining up. This method obviates the usual one by which lining up is attempted, more often unsuccessfully, by using a taut cord or line and sighting the longitudinal center-line of the backbone. The distance between frames may vary according to the spacing which the designer employed, but any distance from the face of the building-board. Draw a straight line from the stem, about one inch above the same, clear across the plan to the end of the transom, or stern, and parallel to a water line, preferably the load-water-line. (Continued on page 69) BACKBONE and KEEL APPENDAGE (See Figs, 1-2-3-4) The backbone is sometimes called the “keel,” but the latter term is confusing, as the fin is sometimes termed the “lead keel.’ “Backbone’’ will be used to indicate the complete main member to which the frames are attached. Save delay-order now from TROST MODEL SHOP Ill. Chicago, Sill W.63rd St., TRACKSIDE EQUIPMENT Specially designed \ to scale with your HO layout. Colorful, attractive, low in cost. (A) HO Picket Fence (White fibre, diestamped) …. 8e ft. (B) HO Hedge (Soft, green sponge rubber) … 10¢e ft. (C) HO Trees (Very realis- yacht beneath the hull proper, or canoe- tic, easily shaped) 10c ea. Send 10c for big Hobbycraift catalog. body, and must also show the lead-line, or lead ballast line, if it is composed of both wood and lead. (See Fig. +.) MEGOW #2. Phila., Pa. RABBET AND BEARDING LINES The rabbet-line must be plotted on the plan, if not shown. Showing the “beard- ing line,” or point at which the cutting of the rabbet is started, is helpful, but not necessary. By placing the backbone {| 4 (coin) for sample dozen, illustrated circular, and hints on using. able, stem, and stern-piece are transferred to light cardboard and cut to shape. Include markings showing frame stations, rabbet-line, and water-lines. accordingly. Frame-patterns may be traced on thinner material. A good quality of type- We will assume that a full-sized plan of the yacht to be built is available, otherwise it will be necessary to draft of MODEL CRAFTSMAN) avail- Fill up the gaps in your collection now. If you delay, it may be too late. Patterns for shapes of the backbone, accompanying this article will be shown plans. sheet, 2c. At your dealer or send 25c BACK ISSUES FRAMES, ETC. on the building board, all illustrations pl Eastern Dist.. Polk’s Model Craft Hobbies. N. Y. C. PATTERNS FOR BACKBONE, As the yacht will be built upside down : own imagination or to your for homes, schools, factories, Styles churches, etc. 4 or 5 Windows per LIL spotted easily. to use. buildings according Create your own | If the building-board, the bearding-line and the varying angles of the rabbet can be which of the three adhesives you elect D DOOR O O HO Gauge – 18 styles – 3 ply Bristol in the frame-mortises when set up on ment, or water-proof glue, according to BREMER S theHouse that has the Goods Ready to Deliver! The keel-appendage is the part of the In order to save unnecessary wordage writer bond paper is suitable, and is : DISTRIBUTOR FOR Rexner Ariel, Peerless, Speedway Champion, Bremer Whirlwind, Race cars. Atwood Champion motor and parts. BOONE’S 810 W. Washington Jackson, Mich. transparent enough to trace the shapes direct from the plan, cuts easily, and is thick enough to run a pencil point around CARVED HULL KITS | Mode! Fittings, Fittings, Sails anc Separate RR CLUB NEWS Blueprints NeWaby Store| | MODEL. WATCH THESE PAGES FOR NEW ITEMS TO BE RELEASED CATALOG “C” 10c The Model Craftsman prints more railroad club doings and photos than any other magazines. Watchs for news of your own club. 17 S.T. Dural heads, %” deep fins. ished inside and outside. Made to any Ratio RAILROADS you desire Will 1007 Penn Ave. | many revs. Please send 3.65 + Om do. ° Wi8 wim) 0:00.0:9.9:0:950 M.O. with your order. 7520 Melrose Ave. Los When writing to advertisers please mention MoveL CrartsMan for April, Angeles, 1941 Wilkinsburg, Pa. wi PRR. Switcher des ugned for beginners 65¢. Complece lines covering the popula CONTAIN LOADS OF ARTICLES Calif. COMPANY boys! 32″ Baby $1 3.95. Other contest Carslog Se Busld « locomotive! Highly pol- 8. B. KORN SPECIALTY MFG, co. | | add MFG. STAPLES mall gages. Our big RR Catalog Se ……..-……..+-+-8 SPECIAL HIGHLY POLISHED EXHAUST STACKS P.P. MOTORS G Write for Stock Offer Dealers! “WIN YOUR RACE” with H1-SPEED PARTS FOR G.R. CYCLONE MOTORS New Catalog Just Out | aippLANEs Model R.R. Exhibit And many others line. hereinafter, the term “frame” will be used to indicate form, mold, or frame. The words “glue” or “gluing” will be used to include Ambroid, celluloid ce- TRYMO, 85 Cortlandt St., N. Y. Gity “€, Od backbone. Keep backbone one inch (or 4 nominal distance) wide athwart-ships. If extra width is needed, show by dotted if the latter is used. SUPPLIES ep® pieces rest on the middle piece of the which makes a neat finish with no holes to fill up. The ribs can be mortised into the backbone, or not, and will take their shape from the planking, or the battens, Miniature Car Racing See Our Permanent Ss VOIT ONE poweRMIST tions, using a long “scarph” or over- If the builder has any qualms about this, he can easily insert a few thin ribs between some of the mid-ship frames and possibly in the way of the bow of the yacht, screwing these to the planks from the inside and filing off the screw points, Every Tuesday 8:00 P.M. OE NNY PSER eS Pp lapped joint where the forward and after of strength on even the larger models. Send 5e for your copy For Immediate Shipment If not shown, the shape of the backbone, stempiece and transom, must be drawn on the plan, in profile, and in the case of the stempiece and transom, also in section. Show backbone in three sec- 4 to 6 inches apart will provide plenty Yacht Spinnakers, NOW IN MIDDLE-WE datum-line will be required to represent of Reading. MODEL YACHTING S FAMOUS MAKE ST TO MAKE 24” a” Preston with cerved bales hull, fat $2.50. make: + Others 25< up. Fittings. B 13 F anew ‘ Shin Catalog Se wrwe ee Tri TP rrr (Continued from page 65) without slipping when marking on wood stock. Frame-patterns may be made showing only one-half the frame, or BOTH sides. For the latter process, which is recommended, fold paper carefully to make center-line, making sure top edge is an exact right angle. Test each folded paper for squareness of top edge and ctnter-line before proceeding. By laying straight, a heavy jack-plane object, or exactly other on the base-line, the top edge of the paper may be kept exactly straight while tracing. Trace shape of section, making sure the center-line is accurate. Also include buttock, water-lines, sheer-line, frame mor- tises and clamp or inwale notches. Fold pattern and cut out with scissors. When opened out, both sides will be exactly the same. Fold paper together and prick through both “pages,” then duplicate the lines already drawn on original half of pattern. Check pattern carefully on the plan, and correct any irregularity. Fine sandpaper wrapped around a small block may be used to fair the edge of paper to eliminate any flats or bumps caused by scissors. It will be necessary to allow for the thickness of the planking, so take a pair of bow-dividers and set to the thickriess of the planking to be used. Mark pat- tern all around outside edges, but NOT the top, or base-line edge. Trim this excess paper off, Now mark in the inside finished line of the frames. Usually about % of an inch is sufficient transverse thickness. Re-check patterns on the plan. They will now be a little smaller, according to the thickness of the planking just trimmed off the pattern, and all edges except the base-line edge should be ex- actly parallel to the full-sized sections on the body plan. The paper-work is now finished, and we are ready to transfer the patterns to the stock preparatory to sawing out and shaping. PREPARING MATERIAL, BUILDING THE YACHT K & K HOBBY SHOP GEORGE R, WILSON MODEL Telephone: Parkside 51/94 Complete line of HO, OO and O gauge trains, boats, airplanes, gas engines, and 511 E. Winspear Ave., Buffalo, N. Y. BUFFALO'S only Hobby 2 Model, Radrosdes for. Mod ‘Letras? ( Whatever may be your needs, call on wé, we can sup ly you promptly. Open evenings until 9 P. M. except an¢) Thursday. Supplies for the Model Builder A_ complete line of model railroad Also model ships, finished and in Fittings and parts. and gas engines; Airplane supplies, steam machinery cars, motors, and parts. and tools. Race HOBBY CRAFT STORES, Inc. 112 W. Wisconsin 7-2197 42nd St. New HOBBY York City OO - HO Kite and Supplies Boats - Racing Cars - Motors - also leathercraft & handcraft supplies. ATTENTION BRONX HOBBYISTS! Ave., Nr. Bronx, N. Y. 159th St., YOU CAN GET ALL YOUR MODEL PATTERSON BROTHERS 12 Pam, Row New York City BAsclay 7-8320 Complete Walthers. id Midlin & Scale Craft lines in Stock NEW YORK’S COMPLETEST KITS - PARTS - ACCESSORIES - TOOLS AIRPLANES - SHIP MODELS - POWER BOATS RACE CARS RAILROADS HO-OO-CD.0O and the botiom of the T is useful to hold the whole building board in a large vise when working. The upper face, upon which the frames are screwed, must be perfectly flat and true. Plane on a good power planer, and check with a taut string. The upper face should be at least 4 or 5 inches wide, and the whole board about one inch thick, and slightly lon zer than the L.O.A. of the largest yacht to be built upon it. Mark center-line, and Station-lines on This article, with photos and drawings, model builders. N. Y. ¢. 100 per cent be- Troy’s New Hebby Headquarters HOBBY MART Open Evenings HOBBY HEADQUARTERS Trains—Race Cars—Airplanes Ships—Motors—Accessories WEST PHILA. MODEL SHOP 711 So. 52nd Street, Phila., Pa. pen 12 hours daily except Tuesday. 10.00 AM to 10.00 PM, Tue. till 6.00 PM. Trade-ins Accepted THE WHOLESALER WHO NEVER RETAILS THEO. 3054 Serving lowa Troy, Laconia, Western When writing to advertisers please mention Move. CRAFTSMAN for April, 1941 Ideal, Westbrook, uel Pittsburgh, Pennsylvania, Pa. Varney, W_. and Eastern Ohio Virginia IT’S NEW! ! Completeness. Distributing All Leading Lines. Railroads - Ships - Aircraft - Buildings ools - Accessories - Motors. Visit our large operating R.R. Layout. HAINES HOBBY HOUSE 44 South 6th Street Open Evenings Reading, Pa. FOR CANADIANS, 0, 00, HO, MODEL RAILROAD SUPPLIES 1935 We sell used equipment. Y. State Gauge. RILEY’S MODEL RAILROADS 56 Fairleigh N. PARKER A Hobby Service Outstanding in its Airplanes, ACCESSORIES FOR ALI. Phone Trey, 202) R. St. Established Feb. ns. Third St. Philadelphia, Pa. 213 W. Chelten Ave., Gtn. Phila., Pa. vic 0811 ele of all kinds, Stamp Collecting, and Rare 88 Railroads, ships and airplanes. Large gtock of kits and parte of better known for FRENCH Ohio Model Planes — Boats — Trains & Accessories hind the merchandise they offer you. It is their most sincere desire to please you so that they may continue to serve you. A. Toledo, HERBACH & RADEMAN, ING. New York City Barclay 7-6395 Shipbuilding, Ave. 522 Market Street Mantua, Supplies for Railroads, Airplanes, Boats See our Operating RR. Layout Railroading, Airplanes, Modelers’ tools & accessories. 85 Cortlandt St. Model of Model HOBBY GENTER and Racing Carg. These dealers stand lines Dealer Accounts Solicited Phone LOngacre $-2434 & 2435 top face of building board. will continue in the May Model Craftsrian. Jefferson POLK’S MODEL CRAFT 429 Seventh Ave. Ohio's finest hobby store special- all leading We carry a complete line of suppliea for all Railroad, Boat and Plane Supplies in New York’s most COMPLETELY EQUIPPED HARDWARE STORE. ept. Qhio You will always find it at the TRYMO HOBBYCRAFT & SUPPLY CO. twist, in 707 Cars & Railroads Join with glue and/or screws into 4 T section (Fig. 6). The T section will or izing For Outstanding Values Third Akron, Motors, HO Gauge RR, Race Cars and Motors, Ship Models and fittings. Jackson’s Models & Supplies 3079 St., SUPPLY COMPANY Northwestern Each month we feature special items at substantial savings. All types of mode) Airplanes, Race Bowery Railroad TOLEDO MODEL AIRPLANE Oakwood 8435 Kita, warp W. Cars, of seale craft equipment. BL. 9719 Open Wednesday and Saturday Evenings 46 East 3rd St. Mt. Vernon, New York straight-grained wood, straight and free prevent 82% face line See our fares operating model railroad exhibit. O Airplanes - 1. BUILDING BOARD from twist (planned four sides squire. Complete LIGHT SUPPLIES MODEL (Bet. 33rd & 34th Se.) The building board should be of clear, equipment. kit form. SHOP Ave.. South, Hamilton. Canada Dealers: Include your name in thig section and get the model builders and hobbyists right see the into..your merchandise store before where they they can - purchase. 69