Macchi 202
The cavity for the landing gear box is cut out after the wings are sheeted (above left). Be careful not to damage the top sheeting. The plywood
various types of woods and bond them in place. Plank the top of the fuselage from F1 to F11 with soft ³⁄₁₆-inch balsa strips, ³⁄₈-inch wide using Sig Sig-Bond. Sheet from the bottom of F1 to the bottom of F2 with a sin- gle piece of ¹⁄₃₂-inch plywood with the grain running fore and aft. Use Gorilla glue to bond it in place. Make provisions to secure the Robart air tank 180 behind F3 that will be installed through the wing opening. Cut out the empennage from medium ³⁄₈-
inch balsa sheet. Slot them for the Sig Brand- XX hinges SH701. Epoxy the ³⁄₈-inch square spruce post into the vertical stab. Epoxy the ¼-inch plywood control horn mounts in place. Protect the top of the wing covered by the fuselage with wax paper. Apply a mixture of Z-Poxy Finishing Resin and Sig Micro-Bal- loons to the wing saddle and rear face of F2 that makes contact with the wing. Use enough of the mixture to bridge the gap be- tween the two as shown on the plans. Epoxy the horizontal stabilizer in place
landing gear box should fit right in (above right). Trim or shim as required. A generous amount of Gorilla glue bonds it in place.
aligning it to the wing. Add the ½-inch tri- angular balsa to the joint. Epoxy the verti- cal stabilizer in place. Use Gorilla glue at the bottom of the spruce post. Temporarily fit the balsa blocks to both sides of the ver- tical stabilizer. Carve and sand them to shape and then glue them in place. Apply a piece of fiberglass tape over the junction of FT11 and the blocks. Carve and sand the balsa tail cone to shape and glue it in place. Remove the wing and sand the en- tire fuselage. At this stage of the fuselage construction
it is a good time to lay out and install your radio and pushrods. Futaba FP-S9101 and 5101 servos were used in the prototype. The blue Sullivan Gold-N Rods were used for the rudder, elevators, tail wheel and throttle control. There is one servo for each elevator and the rudder servo is also used for the tail wheel. There is easy access at this time to make the arrangements for the CH ignition and battery pack. Plan to have access to
them only through the opening in F2 after the fuselage is completed. Sheet the re- maining bottom of the fuselage with ¼-inch balsa with the grain running crosswise. Carve and sand the bottom surface. Reinstall the wing. Cut the ¹⁄₃₂-inch ply-
wood wing fillet platform with the grain running crosswise. Sand the edge against the fuselage as required for the slight bow- ing of the side of the fuselage. Tape it in place and glue small pieces of ¼-inch tri- angular stock along its length at the junc- tion to the fuselage. Remove the wing. The fillet is formed using a thick mixture of resin and micro-balloons. Use an offset spatula to shape it as close as possible and after the mixture cures, sand it with 100- grit paper. Cut the pieces for the coolant radiator
from ½-inch balsa. Glue them together and then carve and sand them to shape. Cut the screw supports from ¹⁄₈-inch plywood and after drilling a ¼-inch diameter hole in the
Full Size Plans Available Through Carstens Flying Plans 20
JANUARY 2012
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