Fuselage: This Lindner-type fuselage is basically two sides separated by a pylon and two carbon reinforced full length balsa longerons. Both have a piece of 3 mm × 0.5 mm carbon strip glued to the 1⁄8-inch side of the longerons to add lateral stiffness. (See Carl Redlin’s article “Building Light-Car- bon Reinforcing”, National Free Flight Di- gest, Nov-Dec, 2012). Pin one side of the fuselage over the wax paper covered plans. Position the pylon and longerons in place, pin and glue. Place the other half of the fuselage side over the assembly, pin and glue. CA is used although a slower drying carpenter’s glue like Titebond can be used. The orientation of the pylon is extremely important as the angle the wing mount makes with the stabilizer is the flying inci- dence. It’s 1.5 degrees (3⁄16-inch). Eyeball the
surface of the pylon that supports the wing platform and make sure it’s exactly as shown
on the plans. The wing platform, made from 3⁄32-inch sheet, is supported by 1⁄4-inch trian- gular strips on each side of the pylon. They are also used as the wing rubber band hold down points. With the wing attached, locate the wing so the c.g. is 75%–78% back from the leading edge. Engine mounting: If you are using the Cox fuel tank/motor mount, use the rectan- gular firewall shown on the plans. If you are using a pressure fuel system and radial mount, use the other one shown, shaping the nose to streamline the structure. Use 3-48 blind mounting nuts and as short of a bolt as you can find for weight savings. The firewall is attached with CA and the front end is covered fiberglass cloth and epoxy.
Preflight inspection
The flying surfaces should be keyed. Check for any warps or irregularities. The right main panel should have 1⁄8 inch washin or trailing edge stock adjustment. This is necessary for a pylon model as they must climb to the right in the power phase and this helps keep the right wing up. Pylon models, where the wing is mounted above the fuselage, naturally want to fly in a climbing right hand helical pattern. This is caused by the location of the wing and stabi- lizer, relative to the engine thrust line. If they roll too much to the right—a natural tendency—they crash in a cloud of dust. To counter this, a little washin is added to the right wing panel to induce a little left roll in the climb. It's still climbing in a right hand helix, but won't go over hard
FLYING MODELS
Order Plan CD465 for $11.00 43
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