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Project Final Report – CUDBF April 30 th , 2009 ASEN 4028: Aerospace Senior Projects 11.2 Wing Sub-Assembly The wing sub-assembly consists of the main wing assembly and the vertical assembly. 11.2.1 Wing Assembly The main wing assembly is composed of a core of 1pcf EPS foam. The foam cores will be outsourced due to the geometric twist of the wing. This will ensure that the foam cores are the correct dimensions. The balsa motor mount blocks are then glued into the foam using epoxy. Also, the main gear mount plywood mount will be glued into the core before sheeting. The foam core will then skinned with 1/32” light weight balsa. The control surfaces will also be sheeted with 1/32” light weight balsa after a balsa insert is glued into the foam for the control horn. The ailerons and elevators will then be attached to the wing halves. Both wing halves will be constructed in parallel and can be seen below in Figure 95. Figure 95: Main Wing Assembly 11.2.2 Vertical Tail Assembly The foam cores for the verticals will also be outsourced in order to achieve the desired tolerances. The verticals and rudders will be sheeted the same way as previously mentioned. After they are sheeted, the carbon support tubes will be inserted and glued in place. These will then be glued to the balsa vertical spar mount. The rudders will then be attached to each winglet. Both vertical tails will be constructed in parallel. A vertical tail can be seen in Figure 96. 116
Project Final Report – CUDBF April 30 th , 2009 ASEN 4028: Aerospace Senior Projects Figure 96: Vertical Assembly The wing assemblies and the winglet assemblies will then be joined. The two wing halves with winglets will then be joined with the root wing joiner to form the wing sub-assembly. The wing sub-assembly is shown in Figure 97. 11.3 Structures Sub-Assembly Figure 97: Wing Sub-Assembly The joint required to fold the wing must be structurally sound since a considerable amount of the wing folds. This is also a very critical element of the aircraft. The wing tips need to fold and 117
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University of Colorado Design/Build
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