Electric-Powered Ww Ii British Biplane
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HOMEBUILT BY ROBERT CASO Although nearly obsolete when WW II fbegan, the Fairey Swordfish generated an impressive combat record with the Royal Air Force (RAF) and Navy (RN). Although it served with distinction, it’s most famous for its 1941 attack and disablement of the German battleship Bismarck. Referred to as the “Stringbag” by its crews, a few Swordfish survive today, mostly in England, and some even fly at airshows. I designed the model using 3-views contained in Hall Park Books’ “Warpaint Series No.12: Fairey Swordfish,” which features many detail photos and color drawings. Framing the model goes pretty quickly. If you’ve built one or two models, the Stringbag is a snap. CONSTRUCTION Building the Swordfish is not at all difficult but requires some kit-building experience. The fuselage is built using an internal frame that the formers are glued to. This is done with the frame flat on the building board with the parts assembled upside-down. The bottom halves of the formers and associated parts are glued into place first. The structure is then removed from the building board, and the top halves of the formers are added. Some bulk- heads are made of two 1⁄16-inch layers of balsa that are laminated together to form a cross-grain 1⁄8-inch-thick part. Some formers require a scrap piece of 1⁄32-inch The dummy radial engine detail balsa to improve their strength. After the wing-saddle Designer Robert Caso poses with his newly adds a lot of character to the doublers have been added, the stringers and balsa sheet- completed Fairey Swordfish. completed model. ing are glued into place to give the fuselage its shape. Aluminum tubes are installed in the fuselage to accept the wire landing-gear struts which will be plugged into MODEL: 1⁄15-scale SPEED CONTROL: Jedi place. The forward fuselage section is formed of soft Fairey Swordfish JES 350 1⁄2-inch balsa blocks. I installed the servos and pushrods WINGSPAN: 37 in. RADIO REQ’D: 3-channel before I added the stringers, so I’d be able to install the pushrod support tabs. An opening between the lower WING AREA: 360 sq. in. (elevator, rudder, throttle); optional torpedo drop wing panels allows access to the radio gear. FLYING WEIGHT: 32 oz. The motor-attachment tube is made out of rectangular COMMENTS: designed by WING LOADING: 13 oz./sq. ft. 1 Robert Caso, the Fairey sections of ⁄16-inch balsa and two nine-sided formers ELECTRIC-POWERED SPECS 1 LENGTH: 28 in. Swordfish is a sport-scale, (one made of ⁄8-inch lite-ply, the other made of balsa). This assembly is also used to support the nine dummy WW II BRITISH BIPLANE POWER USED: Graupner electric-powered biplane that FAIREY Speed 480 (geared 3.45:1) uses traditional balsa-and-ply engine cylinders. Test-fit the motor, and trim the internal construction. It features formers as needed for a good fit. BATTERY USED: 7-cell, permanently attached wings The tail fillet is built with an 1⁄8-inch balsa-sheet spacer 8.4V, 1200mAh and is painted with custom- temporarily glued into place to support the parts. Glue PROP USED: APC 10x7 mixed latex paint. the two tail blocks to the turtle deck while they are SWORDFISH PHOTOS BY ROBERT CASO 2 BACKYARD FLYER MAY 2005 3 HOMEBUILT The top wing center section is built over the plans, and the end ribs are glued at a 90-degree angle to the building board. The dihedral is formed by canting the outer-panel root ribs to the angle cut in the main spars. The easy way to build the wing panels is to pin a leading edge to the board, dry-fit a few ribs to the main spar and then fit this assembly to the leading The basic parts of the Swordfish fuselage. Be Fuselage construction begins with the assembly edge. Lift the rear of the ribs to fit over the sure to run the wood grain in the parts in the of the formers on the center crutch. Use a square proper direction. to ensure that the formers are properly aligned. secondary spar; then slide on the trailing edge, and pin it to the board. Glue this supported on each side by the spacer; edges have slots, and the ribs fit into assembly together, and then fit the rest of then sand them to shape. The finished tail place between them. Use a piece of soft, the components. Use a sharp razor plane surfaces can then be slid into place after 3⁄16-inch-square balsa for all leading edges to shape the leading edges, and finish you’ve covered the plane. and hard, 1⁄8-inch-square balsa for the sec- shaping it with a sanding block. Sand the ondary wing spars. The wings are glued undersides of the leading and trailing THE WINGS into place permanently and are not edges to blend into the contour of the The main upper wing panels are swept removable. ribs. I glued soft, 1⁄16-inch balsa to the and have a slight amount of dihedral, so f To order the full-size plan, turn to be sure to properly position the root ribs “RCStore.com” on page XXXXX. during assembly. The leading and trailing wingtips on the upper wings and sanded balsa for the strip stock and an 1⁄8-inch- butyrate dope to the covered airframe, them to shape. square spruce strip to connect the eleva- and use a heat gun to dry the dope and TO WAR IN A Some ribs in the center section have to tors. Remove any covering from where the to shrink the covering. Avoid overheat- be slotted to receive the cabane struts. empennage will be attached to the fuse- ing it. The sheeted portions of the model STRINGBAG These slots should be backed up with 1⁄16- lage. Hinge the surfaces using CA hinges. were doped with nitrate and then sanded inch scrap balsa to provide an 1⁄8-inch-wide and filled with spackling compound fol- t’s impossible to look at the Fairey cavity for the struts to fit into. The inter- FINAL ASSEMBLY lowed by auto primer. I painted the Swordfish—affectionately known as the plane struts also fit into 1⁄8-inch-wide wells Attach the motor to a 1⁄16-inch plywood model with latex paint. All the markings “Stringbag”—and not say, “You have to built into the wing structures. The lower plate; then screw the plate to the motor were applied with an airbrush, and I be kidding! This was one of the Royal wing panels simply plug into holes and tube. Shim the plate (top and bottom) used clear shelf paper for masking. The INavy’s most effective weapons of WW II?” slots in the fuselage using 1⁄8-inch dowels. with 1⁄16-inch ply to provide a cooling air torpedo was vacuum-formed, and the A gigantic, bi-wing embodiment of the word A little dihedral can be incorporated into vent. For proper balance, place the battery nine cylinders for the simulated Pegasus “anachronistic,” the Swordfish, as the saying these panels for a better scale appearance. as far forward in the fuselage as possible. radial engine were made by stacking goes, may have been ugly but was really slow Test-fit the upper wing in place to I used foam blocks to prevent the battery balsa and paper rings. I made the engine besides. And though ugly may be in the eye of ensure that it is level and square to the from moving. I attached the servos to the cowl out of fiberglass and resin formed the beholder, slow is definitely not. How would PHOTO BY NORMAN FELTWELL fuselage, and then epoxy it into place. As fuselage sides, and I access them through over a mold. you like to be down in the whitecaps, boring in you attach the lower wing panels to the the belly hatch. Balance the model with all on a German battleship that’s looming over you while you’re doing barely six battleships, sinking one and so severely trashing the others that the fuselage, make sure that the inner and equipment installed; move your equip- FLYING 100 knots? Italian Navy never again posed a serious threat to the Royal Navy in the outer struts are cut to the proper lengths. ment accordingly to obtain the correct I flew the model from a paved surface, and The Swordfish would have looked right at home with Snoopy in its cock- Mediterranean. I rigged the plane with Kevlar thread center of gravity location. it looks quite realistic in the air. The model pit, but the truth is, the features that made it look so badly out of place Earlier, in Norway, the Swordfish began what was to become anotherof attached with CA glue. requires quite a bit of elevator and rudder, amongst its warrior peers—its ungainly, form-follows-function design and its specialties: sub hunting. Its initial victim was U-64, the first sub to be COVERING & FINISHING so max out the control throws. With all decidedly slow speed—were exactly what made it so lethal. Its solid, slow- sunk from the air by the Royal Navy in WW II. By War’s end, dozens of TAIL SURFACES I covered the prototype with white that stuff hanging off the aircraft, it will speed handling characteristics made it the perfect platform from which to U-boats had fallen prey to bombs and depth charges laid down by the rat- These are self-explanatory and are built Litespan using Balsaloc adhesive.